CN1018395B - Optical recording medium - Google Patents

Abstract

The present invention relates to an optical storage medium, a minitype disk for example; and the method to manufacture the storage medium (such as the disk). The storage medium is made of a substrate material firmly sticking with a soft metal alloy with high reflectivity. The soft metal alloy has at least two selected metals from cadmium, indium, tin, stibium, lead, bismuth, magnesium, copper, aluminum, zinc and silver, and the weight percentage of each is not less than five hundred percent.

Description

Optical recording medium

Present invention generally relates to the material of canned data coding and make the method for this material, particularly this material be for the optical information storer custom-designed.

The recoverable information storage system of optics can be carried out business-like use (more commonly the form with mini disk provides, as card) with the form of video disk and recording disc.Recently, such as light belt (Gelbart, United States Patent (USP) the 4th, 567, No. 585) with by the De Laitesile of California Meng Tingweiyou, United States Patent (USP) the 4th, 544, No. 835) just causing the attention of business circles.Information carrier or memory storage are as video disk and recording disc, usually as ROM (read-only memory) (ROM).Say that typically information permanently is pressed in the disc in manufacture process with very little structure concavo-convex characteristic storage.The optical reproduction of this data is finished by the different reflection technology that uses the laser of frequency modulation light source.

Information can be placed on those optical memory with very high density, its limit is determined (λ/2NA by the size that diffraction light limited that the laser beam that focuses on definitely resolves into it theoretically, wherein λ is a Wavelength of Laser, and NA is the numerical aperture of focused beam).Be stored on the information principle on the ROM (read-only memory) and can use initial time value of method of optics access, electronic then decoding offers the user with significant form.

In the storage system that is read-only function design, information is stored on the device with minimum concavo-convex form (concaveconvex structure) usually, is showed by the high reflecting background layer on the device.When device moves with respect to laser beam,, but so provide the coded signal of electronic code because the difference of the reflected light signal that the existence of these jogs produces is detected.The essence of detected modulation signal is because the phase relation between the reflected light of the reflected light of concaveconvex structure and its peripheral part changes for the maximum light resolution of reflected signal during the optical reading of ROM (read-only memory) from the coding structure of these systems, information carry a little the surface and the physical distance between the surface of its peripheral part, should make the composition surface laser light reflected between these surfaces on phase place, be ahead of about 180 ° of other surface.When the laser spots of imaging was described in the marginal portion of information point, the harmful interference of the reading light beam that is produced made the strength degradation of folded light beam.

Typically, these concaveconvex structures are made groove and/or burr shape, make the servo-drive system of laser read device can the trace information signal.These tracks guide exactly and laser beam are focused on these aspects so that maximum signal contrast to be arranged between the guarantee information.Usually, the width of the part of depression and projection and the degree of depth are uniformly but are often changing on the length of track.Therefore, the space representation form that the time that these features can more contained frequency modulated signal changes, these signals are because video, or the more complicated form of expression digital data encoding.

The typical manufacture method of ROM (read-only memory) (for example disk) is with these depressions and projection or track punching press or the surface of annotating stock, the most frequently used is the compound substance of polymerization, or photosensitive paint is sprayed directly into the photopolymer that forms on the substrate.Temperature that former is strict and pressure control are with the distortion of minimizing dish and the impurity (reducing by 2 refractions) with inhomogeneous optical characteristics of trying one's best.Following saturating fault of sending out of both of these case is particularly crucial for the system of reading from substrate.

The forming surface of the substrate of the substrate of ROM (read-only memory) as aluminium, can be distinguished the digital signal that with jog branch produce the substrate of an i irradiating light beam reflection to be provided, to make coated with the skim highly reflective material.On the coding reflecting surface of being everlasting, add a suitable protective seam then,, guarantee that simultaneously this system is not subjected to any contamination by dust or galled spots when reading light not by substrate to prevent this surface by mechanical damage or environmental aging.

Except that ROM (read-only memory), write medium and reading and writing, scavenge system again and introduced market recently.Being typically these systems utilizes diode optical excitation device that coded message is read or write from device.Information material can have several forms: comprising some nonvolatil record materials in advance (being similar to ROM (read-only memory)), in addition can also by the user with light beam directly or indirectly reciprocation for good and all form (writing again); Full detail is written into by laser; Maybe can form or eliminate and (write with the laser reciprocation.Read.Remove).

The effect of writing again of optical information storage usually provides in " direct read after write " mode (DRAW), and perhaps further, " repeatedly read-write " be medium (WORM).On this, light storage device or dish have used suitable track with relevant access information preformatting.Some devices have suitably merged reflection and active layer becomes sandwich construction.

Keep the write device again of recording or video signal to be called recordable mini disk memory storage.For these devices are used on the standard device under the present industrial standard, they must have about 70% reflectivity, its sensitivity simultaneously will be enough to write under the speed of about 4.3 megahertzes, and this is recording or the desired check speed of video signal reproduction.Under this check speed, the susceptibility of medium should be enough to make it to allow the work of writing with the laser of about 10 milliwatts.Till now, without any can reaching these standards, device comes into the market.One embodiment of the invention just have this about 70% reflectivity levels, in the ability of about 4.3 megahertzes with the laser log of about 10 milliwatts.

In the present invention, reflection is same one deck, i.e. alloy with active layer.This active layer is applicable to that new data is by the apparatus for encoding with the reciprocation of light.For example, a branch of light modulated is through making coded message enter its surface on the size that it is closely gathered a point, and the size of this point is the power ratio change of optical property of the mobile layer of detection dish effectively on the unit area.The essence of detected modulated light signal is because the polarization state difference of coefficient, catoptrical phase relation and the folded light beam of absorbed reflection in reading process.

The representational form of the WORM medium textural association of data coding (will finish together) comprising: phase change system people such as (, United States Patent (USP) the 4th, 579, No. 807) Boulogne morals, and configuration is revised, and light magetic device, bubble form, and ablation/melting appartus.The comment of these devices can be seen " vacuum technique periodical " A3(3), 1985, the 640th to 645 page, author Li Wenyang.Ablation/melting appartus is repeatedly the most conventional form of read-write system.Data stores with little concavo-convex form, these little concavo-convex be will approach active layer (the most frequently used metal or metal alloy) with optical radiation (spot heating begins to form from the surface melting of dish or the bottom line of ablation to the material on the active layer.In this method, the surface structure of ablation changes, and detects thereby can carry out light.

In these examples, because tellurium has lower fusing point/ablation point, so generally on the part of active layer, contain its alloy.Fusing/ablation along with the tellurium alloy of part has produced the fine porosity and has exposed following substrate.This hole can carry out the light inspection with at least two kinds of structural shapes.

In first kind of pattern, second substrate suitably is attached on first, the substrate that it and first are coated with tellurium from a distance so that between two substrates, produce an airspace.Because tellurium alloy has level and smooth reflecting surface, ray correspondingly reflects from its surface, and after hole formed, light passed across first transparent substrate and internal reflection and loss in the airspace.Therefore, unaltered surface reflection occurs and hole divides and deceives.This pattern often is called as " the sandwich dish of writing again of air " (Kenny, United States Patent (USP) the 4th, 074, people such as No. 282 and Lai Heliee, United States Patent (USP) the 4th, 308, No. 545).

In second kind of form, low reflexive tellurium alloy overlays on the medium that is made of the metal substrate (as aluminium) that overlays on successively together.This form provides with the three-decker of reflex reflection usually.The thickness of medium is carefully selected, and penetrates light to the i that makes the information that reads from disc and produces harmful interference.Therefore before writing, device has almost absorbed the radiation of all reading light sources, and in the place that hole forms, because the shortage of tellurium alloy has been eliminated harmful interference of optical radiation, light can reflect the metal surface below it.

These two kinds of forms show that numerical information exists in the dish with the form of different absorptions and reflective surface area, and require it to carry out comprehensive Design by satisfying signal to the standard of sound conversion.

Although carried out extensive studies, still show a lot of utmost points based on the system self of tellurium and alloy and do not meet the characteristic that commercial repeatedly read-write system needs, can not be used for the record of mini disk memory storage.At first, very unstable when tellurium and alloy are exposed in oxygen or the moisture, therefore need expensive dish airtight sealed structure, to guarantee the minimum 10 years filing storage life (Mei Shita etc., United States Patent (USP) the 4th, 433, No. 340) of data.Secondly, because tellurium and the peculiar toxicity of alloy thereof are careful in the extreme when using tellurium in manufacture process.In addition, unchanged tellurium film and low by the catoptrical contrast between the hole of laser beam generation makes the storage of data and extracts important mistake to occur.Theoretically, accurate and reliable matching requirements has the contrast greater than 5 to 1.That is to say, be that the system of stock only shows about reflectivity of 35% to 40% with the tellurium, so it can not satisfy the standard of mini disk memory means record.

Several criterions of being considered when selecting and design active layer depend primarily on the contrast of optimizing in these devices.For example, because speed is important consideration when data logging and recovery, therefore in the repeatedly read-write or mini disk memory storage of ablation/fusing type, active thin metal alloy reflection horizon is very desirable as suitable material, so that can make laser emission promptly form jog under the little energy consumption of trying one's best.In addition, to keep relatively unaffected when datum recover also be important in the metal surface that forms the activity of sunk part circumferential surface and reflection.Any destruction on this surface all will cause the decline of optical signal quality in reading process, thereby the error rate (BER) of increase sunk part becomes the ratio of sound with the reduction conversion of signals.

(ROM in above-mentioned all references are used, WORM and recordable mini disk storer), the most important thing is that active reflecting surface wants evenly, and can between information point and circumferential surface thereof, provide significantly, contrast clearly be that the ratio of sound reaches maximum so that make conversion of signals.In addition, in order to ensure the long preservation of coded message, require the surfacing of active reflection to have corrosion-resistant and anti-oxidation characteristics highly, corrosion and oxidation can make signal rotten.Reflecting material is attached on the support substrate securely and stability with size and environment be reflectivity that important active surface has a height thereby not need second reflection horizon also be favourable, this will reduce the expense of light storage device.

The invention provides a kind of improved light storage device and manufacture method thereof, it can be finished at an easy rate and not need too much expense, and has the fabulous size and the stability of environment.The present invention utilizes a substrate that posts a metallic film, and the substrate made from glass, pottery, epoxy resin, plastics, fiber-reinforced plastic, metal and their compound substance all is applicable to the present invention.

Soft metal alloy with highly reflective energy is by comprising that from one group at least two kinds of metals selecting the metal of cadmium, indium, tin, antimony, lead, bismuth, magnesium, copper, aluminium, zinc and silver are formed, and every kind of shared percentage by weight of metal is at least 5%.

Reasonable metal alloy comprises that percentage by weight is about 5% to 95% tin, and percentage by weight is about 5% to 95% bismuth, and percentage by weight is about 0 to 40% copper.

Preferable soft metal is the alloy that percentage by weight is about the copper of 5% to 95% tin, about bismuth of 5% to 95% and 0 to 40%; Or the alloy of about tin of 5% to 95%, about bismuth of 5% to 95%, about silver of 0 to 49.9%; Or be about zinc of 5% to 95%, about cadmium of 5% to 95% and about silver of 0 to 49.9%; Or be the alloy of about zinc of 5% to 95%, about cadmium of 5% to 95% and about magnesium of 0 to 10%; Or be the alloy of about tin of 0.1% to 95% and about indium of 5% to 99.9%; Or for containing the alloy of about tin of 5% to 95%, about lead of 5% to 95% and about copper of 0 to 40%; Or be the alloy of the silver that contains about tin of 5% to 95%, 5% to 95% plumbous and 0 to 49.9%.

The compound substance of this metallizing is suitable for manufacturing sheet form and very high uniform outer surface and reflection characteristic is provided very much.In an embodiment of ROM (read-only memory), track or coded message can directly be pressed onto on the surface of substrate metallizing, deformable compound substance (for example plastics).Substrate (for example disc) with the pre-mold pressing of the metallized process of metal alloy of the present invention also obtains considering.In another embodiment of ROM (read-only memory), track or coded message produce with conventional method, for example use the method for injection molding, then with its surface spray coating alloy of the present invention.Its progressive is that ROM (read-only memory) has stronger corrosion resistivity.At another repeatedly in the embodiment of the embodiment of read-write equipment and recordable mini disk storer, track, form and/or permanent information or data are to be pressed onto on the disc the described mode of ROM (read-only memory), perhaps use other present employed manufacture method described above, but on dish, should keep the space of new light writing information coding.These methods can not carried out mold pressing, and comprise the substrate that glass, pottery, epoxy resin, plastics, fiber-reinforced plastic and compound substance thereof are made.These devices are all patterns approximately, comprise ROM (read-only memory), repeatedly read-write equipment, recordable mini disk storer and their combination in any, can be made according to the method for the present invention, with the optical read/write system (that is: dish, card, band or the like) of any size, shape or the form that meet existing device.Coded message directly is pressed onto on the metallized surface by continuous mould pressing processing or pencil effect.Therefore the displacement of the part that coded message can be by compound substance is compiled in metal or the deformable thin compound substance.Formed dish can downcut from the thin type raw material with suitable technology, and diaphragm and label etc. are provided, and obtains complete ROM (read-only memory) or read-write equipment system repeatedly.Ability that the dish of finishing forms continuously and the metallization thin type raw material that can downcut the dish of finishing are better than being used for now producing these ROM (read-only memory) and the conventional method of read-write equipment dish repeatedly significantly on expense.In addition, metal alloy of the present invention shows good anticorrosion properties and other characteristics important and an urgent demand.This alloy can be simultaneously as the reflection horizon and the active layer of medium.Therefore, with can the improve device of permanance of alloy of the present invention.(for example, disc).This device can be handled by above-mentioned mold pressing and make, or handles or any other technology (for example corrode the hard epoxy resin of a slice, glass, pottery, fiber-reinforced plastic or metal substrate, use alloy of the present invention then) by molding process, 2P.

By the description of back and claim of enclosing and corresponding accompanying drawing, other advantage of the present invention and characteristic can become more clear.

Fig. 1 represents to use material of the present invention, uses the technology of continuous mould pressing to make a possible production schedule sketch of optical devices (for example, coiling);

Fig. 2 be optical medium made according to the method for the present invention (sectional drawing of) a amplification for example, a dish, this part has formed suitable rail groove, these rail grooves can be coaxial, spiral or be divided into the coaxial track of several classes;

Fig. 3 is the section view that utilization according to the present invention is pressed onto digital code information an amplification of the stamping machine part on the metal layer of medium (for example dish);

Fig. 4 is similar to Fig. 3, but its expression is that coded message is pressed onto another kind of stamping machine form on this medium (for example dish);

Fig. 5 is the section view of a kind of medium similar to Fig. 2 (for example dish), but expression to be the method for ablating with mold pressing and light be imprinted on numerical information on separately the track;

Fig. 6 is similar to Fig. 5, but the coded message of its expression is positioned at the recess of track;

Fig. 7 is also similar in appearance to Fig. 5 and 6, but expression is the both sides that coded message is imprinted on track;

Fig. 8 is the sectional view that passes the amplification of an optical medium (for example dish), represents that two kinds of coded messages according to the present invention are pressed in two kinds of forms on the medium (for example dish);

Fig. 9 is the sketch that produces the process of point shown in Figure 8 with light beam;

Figure 10 represents to calculate the schematic form of test unit that is mapped to the metal/polymer composite material surface according to the present invention and makes it to produce the light quantity of physical change; And

Figure 11 is the synoptic diagram of the difference of the reflectivity of height between point on the medium of making according to the present invention (for example dish) and circumferential surface.

The present invention includes multiple layer metal/substrate compound substance and manufacture method thereof.The definite metal alloy that develops as the production of the reflection of automobile and other means of transports and setting part before this invention is directly used provides very useful material to be used for producing the data storage material readable and/or that can write of optics now.These compound substances and manufacture method thereof can be with reference to the data of following announcement: Ke Fuman etc., U.S. Patent number the 4th, 115, No. 619, distribution on September 19th, 1978; Ke Fuman etc., United States Patent (USP) the 4th, 211, No. 822, issue on July 8th, 1980; Ma Dun etc., United States Patent (USP) the 4th, 241, No. 129, issue on Dec 23rd, 1980; And Ke Fuman, U.S. Patent number the 4th, 510, No. 208, issue on April 9th, 1985.Each all relates to manufacture method at the polymer matrix film of a surperficial metal clad alloy particularly these patents, and wherein metal alloy shows high reflection characteristic, loses in the use of the metalized surface that this specific character can be not afterwards.

The United States Patent (USP) of Ke Fuman etc. has been announced a kind of metal/organic polymer composite material of multilayer for the 4th, 115, No. 619, and this article also provides through metallized polystyrene or polycarbonate membrane.This metal alloy can contain weight and be at least one or more metals in 50% antimony, indium, bismuth, tin, zinc, cadmium and the lead; Weight accounts for one or more in 10% silver, copper, gold, aluminium and the magnesium.Better scheme is that this metal alloy contains 5～95% tin, 5～95% bismuth and 0～40% copper.The metal/polymer compound compound substance that the United States Patent (USP) of Ke Fuman etc. is announced for the 4th, 211, No. 822, soft metal alloy wherein uses 25～90% tin, and 8～-60% bismuth metal alloy uses 25～90% tin, 8～60% bismuth and 1～25% copper.

The United States Patent (USP) the 4th of Ma Dun etc., 241, announced a kind of metal/organic polymer composite material structure of multilayer for No. 129, organic polymer wherein is polycarbonate, thermoplastic polyester, the polymkeric substance of acrylic resin, monovinyl arene polymer, vinyl chloride or vinylidene chloride or diethanol resin, and metal is indium or is at least two kinds alloy in cadmium, indium, tin, antimony, lead, bismuth, magnesium, aluminium, zinc, copper or the silver.Polymeric layer can contain the soft adhesive phase of one deck, and this adhesive phase is a dience rubber, perhaps contains the multipolymer of polystyrene, and polybutadiene, polyisoprene, pliable and tough polyurethane and the material of other thermoplastic elastomer polymkeric substance.Alloy-layer comprises 5% to about 95% tin, and 5% to about 95% bismuth and weight ratio are about 0% to 40% copper.

The United States Patent (USP) the 4th of Ke Fuman etc., 510, metal/organic polymer composite material of announcing a kind of multilayer No. 208, wherein plastic layer is that one deck is attached to the thermoplast on first metal level of being made by the alloy of two or more metals, second layer metal is made by a kind of metal or by the alloy that two or more metals constitutes, and is attached on the ground floor metal.The alloy of ground floor is formed by the two or more metal from one group of cadmium metal, indium, tin, antimony, lead, bismuth, and contains 5% to 40% copper.The second layer metal alloy is to be formed by two or more the metal in cadmium, indium, tin, antimony, lead, bismuth and the zinc.Contain weight ratio in the second layer metal alloy and be at least 30% tin and at least 40% bismuth.

It has been found that the alloy of being announced has very low fusing point in above-mentioned referenced patent.In addition, the degree of corrosion of these alloys is all extremely low, therefore make it chronically the store information coding read repeatedly and do not reduce the ratio that conversion of signals becomes sound.Except fusing point is low, material preferably has lower thermal diffusion coefficient, so that the heat that in the process of writing, produces neither can the loss adjacency substrate layer, can transverse dispersion do not make expanded in size a little yet, and only in reactive metal layer, form cleaning, distinct point.

In addition, this metal alloy should have suitable surface tension, so that the point edge that is produced when the light beam that use is write is clear, thereby for the process of reading provides obviously, signal clearly.This alloy also must easily be attached on the substrate securely and be plated on the substrate, so that form all even continuous layer on the microcosmic in the above.Unexpectedly, exist in the material that in fact these characteristics of having relatively high expectations have all been announced in the patent of above-mentioned institute reference.

In addition, produce the process suitably explanation of this metal/substrate compound substance, a kind of is to contain the thin slice mold pressing processing continuously of substrate material, another kind of method, produce the metal/polymer composite material film, be divided into substrate material with suitable method then.In one embodiment, on-chip metal alloy can also obtain by inserting layer of copper.This is a kind of copper wire arrangement.Substrate can be any material that metal alloy is sticked and the physical strength of supporting is for it arranged.In another kind of embodiment, substrate is repeatedly to put another on-chip thermoplastic sheet after mold pressing.Glass, pottery, plastics, fiber-reinforced plastic, epoxy resin, metal and compound substance thereof can be as substrates.

With reference now to Fig. 1,, represented a kind of feasible method of the present invention among the figure, but the data storage dish that wherein light is read and/or but light is write can be at an easy rate and produce admirably.In illustrated method, the compound substance substrate of polymerization can be any suitable material that resembles makrolon material, organic glass, polystyrene etc. with material continuous or semi-continuous mold process formation substrate.This thin slice can form or form separately with extrusion molding or other ironed processing procedures with continuously shaped effect.Plate the extremely thin emtal alloy film of one deck in its surface, for example use vacuum evapn depositing operation or spraying technique, see No. the 4th, 107,350, the United States Patent (USP) of Burger etc.The metallized thin material of Zhi Zaoing is compared the advantage with many weight with the optical disc of using existing technology manufacturing by this way, it has not only improved productivity, saved basic charge, and the detection of many useful quality controls can carry out before coded message is forced up, and therefore finally suppressed the remarkable minimizing of effective production time in the production of dish.

Then thin material is carried out the mold pressing treatment process and handle, there, one or more trace informations, format information and/or digital code information can be printed directly on its metal surface.This die work can be finished with Fig. 3 or standard stamping machine shown in Figure 4, represents with reference number 10 and 12 respectively among the figure.In the drawings, digital code information is imprinted on respectively on the surface 18 and 20 of block press 10 and 12, and is expressed as salient point 14 or hyporeflexia point (as the hole) 16 respectively, and the shape of block press depends on the form that requires the track that forms on the surface of thin material.

As shown in FIG., the form of these tracks all comprises convex surface and concave surface 17,18 and 20,21 respectively, and is connected by angled side walls 22,24 respectively.In this dish type memory storage, these tracks can be little by little radially move inward with the form of helical.From Fig. 3 to Fig. 6 also as can be seen, the coded message of representing with salient point 14 and concave point 16 respectively on block press 10 and 12 can form the surface of protruding or caving in.

Needed stamping machine generally is placed on (i.e. continuous thermoforming system, or suitable mechanical hook-up are taken turns in pressure rolling) in the suitable thermoforming system, heats thin material then, and extrudes track and coded message in its surface.Because the plastic character of the height of the metal/polymer material among the present invention can not make the reflection characteristic of spectrum that significant loss is arranged, this effect is very suitable to the optical memory of thermoforming, thereby does not need in advance with the thin layer overlay metallization.

Fig. 5 represents for example dish of medium 26() a part, it is formed by the block press shown in Fig. 3 10.As shown in FIG., the initial shape of substrate 28 and metal coating 30 is plane forms, so that produce desired track and coding concave point 32.

Similarly, Fig. 6 represents for example dish of medium 34() a part, it is formed by block press shown in Figure 4 12, and contain track with the coding salient point 36.

The medium of handling through mold pressing (for example dish) can hob or punching press is come out from thin material, then respectively apply be coated with metallic surface 28 and 28 ' on be covered with the protective seam (respectively in Fig. 5 and Fig. 6 with reference number 38 and 38 ' represent) of one deck relative thin.Formed device (for example dish) can be paid merchant's fortune with packing through suitably labelled.

It should be noted that the formation of these tracks and numerical information can carry out with continuous technology, for example the method for being discussed among Fig. 1 in front; Perhaps other schemes of carrying out continuously comprise that the film that will handle through mold pressing is layed onto on the substrate; Perhaps use some semi-continuous technologies, its each step all carries out in order; Perhaps use conventional batch process, its blank disc will pass through injection molding, carry out the deposited plating of metal with alloy of the present invention.The right explained hereafter that extrudes numerical information and track is come out.

Fig. 7 represent one for example coils similar in appearance to Fig. 5 and medium 40(shown in Figure 6) sketch, different is the track form.In this medium, the shape on surface contains inclined wall 42 and 44, and each inclined wall can have the coded message of concave point 46 forms.This device 40(for example coils) also comprise and be similar to substrate 48 with the polymerization that is similar to metal alloy coating 50 having of said apparatus.

Referring now to Fig. 8, its expression medium 52(for example coils) the detailed sectional view of amplification of a part, the coded message on this apparatus surface is in order to mold pressing point 54 and writes the form formation of the ablation point 56 that technology obtains with ablation light.Wherein be noted that the expression these coded messages point 54 and 56 minimum, in general the diameter for mold pressing point 54 is 0.08 micron, about 0.05 to 0.5 micron dark.What these points wide should be for beam diameter more precisely is about 1/3, and the degree of depth is about (2n-1) λ/4, and n is an integer here, and λ is the wavelength of light beam.This minimum size can make a large amount of coded messages be placed on to compare on the less surface area, thereby the data storage amount of very high density is provided for light computer-readable recording medium (for example dish).Fig. 8 also represents the typical structure of guide rail.The width of guide rail is preferably the about 1/2 of λ irradiating light beam diameter, and the degree of depth is about ((2n-1 λ/4)-λ/8).

And, as Fig. 5 to shown in Figure 8 have metal apply coating 30,30 ', 50 and 60 substrate 28,28,48 and 58 thickness preferably is about 1 * 10 ^-1To about 1 * 10 ^-1Rice, optimum thickness is about 0.1 to 5 millimeter.The thickness of metal alloy film is preferably in about 20 between about 10,000 dusts, and optimum thickness is to 2000 dusts from about 20 dusts.In some reasonable film embodiments, the thickness of metal alloy film is in 80 to 320 dusts and 200 to 320 dusts and 260 to 320 dust scopes.In other mold pressing scheme, the thickness of metal alloy film is preferably in the scope of 100 to 200 dusts.

The metal alloy of being announced in above-referenced is preferably formed by two kinds in the following metal at least, and its weight ratio is no less than 5 percent.These metals are: cadmium, indium, tin, antimony, lead, bismuth, magnesium, copper, aluminium, zinc and silver.Best combination is that weight ratio is about 70% to 75% tin, about 20% to about 25% bismuth, and 0 to 5% copper, and wherein copper is preferably 5%.In the thin material thermoforming, find that the mold pressing head can be heated to about 30 to 340 degrees centigrade under 10 to 500 pounds the pressure per square inch.The time of moulding is depended on many factors to a great extent, generally finishes in about 0.5 to 60 second time.

As mentioned above, the medium made of the method according to this invention (for example dish) can be encoded with the master die press.Therefore, these same devices (for example dish) all are highly suitable for ROM (read-only memory), repeatedly read-write equipment or the application of recordable mini disk storer or their any combination.

Fig. 9 illustrates laser instrument 66 and is launching the light beam 68 of a branch of high order focusing and pass protective seam 70 and be mapped to process on the metal active layer 72.Light beam 68 on metal level 72 promptly spot heating so that form the front portion of point (as the hole) the 74(diagram part of hyporeflexia therein).At the duration of work of writing, the place of beam intensity maximum will directly produce fusing or ablation owing to the thermodynamic property of metal in the laser, and its surface tension will make to close and produce a concave point and form a ring edge around formed point at last.Certainly, if necessary, laser beam can focus on the metal active layer 72 and penetrate substrate.

Except this method of the present invention, the medium that any usefulness alloy of the present invention forms can carry out moulding with casting process and/or other present employed technology of routine.The selection that is used for repeatedly the material of read-write equipment and readable mini disk storer (for example dish) is very important, this is because laser can very rapidly produce mark or point on the surface of active layer, and these points are wanted and can be differentiated well, so that produce the ratio that becomes sound than higher conversion of signals in using repeatedly.Furtherly, the thickness of control reactive metal layer is write dish effectively with coded message to go up required performance number also is important to reduce laser as far as possible.Certainly, must keep the net thickness of this alloy, so that the minimum differentiation of used power when obtaining writing required power with the work of reading on CD is any rotten thereby the quantity of power of the function of reading can not make alloy film produce in the process of reading.

Figure 11 represents is when CD is read coded message, with the difference of the light signal of reading shown in the test unit indication shown in Figure 10.Wherein can be clear that the rapid variation between the measured signal of the unmarked surface (shown in the top among the figure, representing) of dish and the point (shown in the bottom among the figure, representing) that gets on punching press or laser-light write with reference number 64 with reference number 62.This variation is represented with the spiking that diagram sharply descends.The small unevenness of the surface configuration of formed dish produce figure like this top (this zone represent with reference number 62) shown in intensity of sound.

In development with assess and generally adopt following condition in the example of the actual work of finishing of the present invention: film thickness is determined with R.D.Mathis TM-100 thickness monitor, quartz transducer is placed in the same plane of substrate material, uses the density of material and 6.15 * 10 of every cubic centimetre 7.80 gram when determining alloy thickness ⁵The gram/(centimetre. second) acoustic impedance.

Example 1

A kind of industrialized 1 * 10 ^-3Polycarbonate thin plate (the Lexan that rice is thick ^Fm) be used as the polymerization substrate, there is the optical lens paper of methanol/water solution that it is gently cleaned with inhaling.Then thin plate is placed on the drying of carrying out in the vacuum of 100 24 hours.

The sample of 3 inches and 3 inches square stocks covers with the thick metal alloy film of 200 dusts, and metal alloy contains tin/bismuth/copper, and the weight ratio of mixing is respectively 75/20/5.With the alloy steam of speed heat Bill in routine.Make coating in the vapor deposition device of Zha Er.The wire examination of the alloy of one 0.02 grammes per square metre is placed on the electric current with 120 amperes heats its resistive ground in 1.5 centimetres the tungsten evaporating pan, makes it to evaporate.Employed pressure is 8 * 10 mm Hg in this system.The speed of thin film deposition and thickness are monitored with a vibrating quartz crystal sensor.

The plasticity thin plate of making that is covered with metal is subsequently with the hard ambrose alloy block press mold pressing of the numerical information that has several sizes that etch on the surface.Block press contains four quadrants, the one micron dark hyporeflexia point (for example hole) (diameter is respectively 5,7,10 and 15 microns) with circle.This metal pattern press is made by this photoelectricity scientific company of the prominent human relations in California.

Thermal control parallel-plate hydraulic means is used for the numerical information on the stamping machine is stamped on the plastic composites that is covered with metal.Staking punch is heated to 180 degree Celsius, and stress is transferred to 150 pounds per square inch.All clamp time is 30 seconds.After the mold pressing, the plasticity thin plate that will be covered with metal separates with block press and cools off.

The device of Chan Shenging shows the accurate mirror image image of the block press of the application that is suitable for optical memory at last.Electron scanning micrograph shows that the whole metal alloy film of substrate surface is continuous.

Example 2

Similar described in the ratio 1, polycarbonate substrate covers with the thick metal alloy film of 2000 dusts, and metal alloy is made up of tin/bismuth/copper, and the weight ratio of mixing is respectively 70/25/5.This coating is to make by the rapid thermal evaporation of the alloy of a circle circle continuous rolling.Subsequently, produce the digital metal block press described in the part use-case 1 of the plasticity thin plate be covered with metal and carry out mold pressing.

The parallel-plate hydropress is used for numerical information contained on the block press is molded on the plastic composites that is covered with metal.The mold pressing head is heated to 200 degree Celsius, and pressure is adjusted to 300 pounds per square inch, and all the punching press time is 18 seconds.After carrying out punching press, the plasticity thin plate that is covered with metal separates with stamping machine and cools off.

The device of Chan Shenging shows the reflection of mirror image accurately of stamping machine at last.Electron scanning micrograph shows that the film of the metal alloy on the surface that covers dish is continuous.The laser scanning of the numerical information of punching press the analysis showed that accurately duplicating of stamping machine finish.

Example 3

Prepare one 2 inches * 4 inches * 0.125 inch organic glass substrate, and use with example 1 in the polycarbonate substrate similar methods clean.Be covered with the thick metal alloy film of one deck 200 dusts on the substrate, metal alloy is respectively tin/bismuth/copper of 75/20/5 by the weight ratio of mixing and forms.This coating is by the Bill of alloy in routine.Thermal evaporation promptly in the Zha Er vapor deposition apparatus is made.

Among Figure 10 the diode laser read/write system shown of letter be used for being covered with that the ablation diameter is about 0.9 micron the numerical information of writing on the plastic composites of metal.This laser aid comprises the difficult to understand special 30 milliwatt Ga Al As semiconductor lasers (representing with reference number 76) of a scalable light intensity, and its output is directly proofreaied and correct by Glan-Tang Pusen ahrens prism and a quarter-wave plate.(using reference number 78,80 and 82 expressions respectively), then, light beam is being covered with closely focusing and imaging on the plastic composites of metal.The surperficial institute laser light reflected radiation of compound substance is returned and is passed these optical elements, and is separated also directly to photodiode detector (reference number 84) by above-mentioned ahrens prism (80).The optical signals system ensemble (86) of reflection is handled, and makes IBM personal computer (88) and business software and hardware (Stamford research company) carry out computational analysis and demonstration then.

When laser power 10 milliwatts, with these points of 1000 nanoseconds pulse width measurings, its read rate generally surpasses 30 to 1.System hereto, the minimum value of power of laser-light write of carrying out read/write is preferably lower than 0.1 milliwatt near 1 milliwatt for the power magnitude of reading light.

The micro-analysis of these points shows around these level and smooth points it is the loop configuration of projection.

Example 4

With one 1 * 10 ^-3The thick industrial polycarbonate thin plate of rice is as the substrate of polymerization, with inhaling the optical lens paper wiped clean mildly that methanol aqueous solution is arranged, places it in the vacuum of 100 drying then 24 hours.

Then with this no coating polymerization thin plate of digital metal stamping machine punching press that has the numerical information that etches.This stamping machine comprises circular four quadrants, one micron dark hyporeflexia point (for example hole) (diameter is respectively 5,7,10 and 15 microns).

With the parallel-plate hydropress numerical information contained on the stamping machine is stamped on the plasticity substrate of exposure.Staking punch is heated to 200 degree Celsius, and pressure is adjusted to 300 pounds per square inch.All the punching press time is 30 seconds.Carry out after the punching press, plasticity thin plate and stamping machine are separated and cool off.

The device of making at last shows the relation of mirror image accurately of stamping machine.

Containing the thick metal alloy film of 600 dusts that weight ratio is respectively tin/bismuth/copper of 75/20/5 through the substrate of punching press with one deck covers.This coating is to be used in conventional Bill. the method with the rapid heating evaporation of alloy in the Zha Er vapor deposition apparatus forms, and the basic pressure of system is 8 * 10 ^-6Mm Hg.The speed of thin film deposition and thickness are monitored by the vibrating quartz crystal sensor.

In fact following example 5 to example 15 is not used, and believes that they also can be used for producing effectively and at low cost optical storage.

Example 5

Polycarbonate, organic glass, polystyrene or other are any can be used as substrate with the compound substance that is fit to that the form of thin plate is used, and its thickness is preferably in 1 * 10 ^-4To 5 * 10 ^-3In the scope of rice.This plasticity thin plate is preferably in the clean environment and forms, so that the optical material that obtains cleaning manages in clean environment then.

Then substrate is covered with the thick metal alloy film of one deck 20 to 200 dusts, this metal alloy can be made up of cadmium, indium, tin, antimony, lead, bismuth, magnesium, copper and silver, the percentage by weight that alloy constitutes is that every kind of metal is no less than 5 percent, and contained metal is at least two kinds in the above-mentioned listed metal.

Coating is the most handy with the Bill of alloy in routine.Promptly the method for heating and gasifying or active method of spraying are made in the Zha Er vapor deposition device.

The plasticity thin plate of making at last that is covered with metal can have the digital metal stamping machine punching press of numerical information with etching on the surface.

Continuous feed thermoforming system is used for the numerical information on the stamping machine is stamped on the plastic composites that is covered with metal well.The drift of system is heated to 30 to 450 degree approximately Celsius, and pressure is adjusted to per square inch between 10 to 5000 pounds.All the punching press time was preferably between 0.5 to 60 second.

Example 6

Polycarbonate, organic glass, polystyrene or other any suitable plate-shaped compound substances can be used as substrate, and its thickness is preferably in 1 * 10 ^-4To 5 * 10 ^-3In the scope of rice.This plasticity thin plate is preferably in the clean environment and forms, and the optical material to obtain cleaning manages in clean environment subsequently.

Substrate is covered with the thick metal alloy film of one deck 20 to 2000 dusts, and metal alloy is made up of at least two kinds of metals in cadmium, indium, tin, antimony, lead, bismuth, magnesium, copper and the silver, and the mixed weight ratio of alloy is no less than part 5 percent.

Coating is with the Bill of alloy in routine. and the method for heating and gasifying or the method for injection are made rapidly in the Zha Er vapor deposition device.

The diode laser read/write system is write on the plastotype compound substance that is covered with metal this information of reading back again then with the numerical information of micron size with the method for ablating.

Under the laser power of 0.5 to 30 milliwatt, be 10 to 1,000 with pulse width, 000 nanosecond pulse can obtain these points greater than 50 to 1 read-around ratio.The power magnitude of reading light preferably should remain below 0.001 to 0.5 milliwatt.

Example 7

Being similar to example 1 described polycarbonate substrate can cover with the metal alloy that the thickness that be respectively tin/bismuth/copper of 70/25/5 by the weight ratio of mixing is about 200 dusts.

The formed plasticity thin plate that is covered with metal can have the digital metal stamping machine of helical type or radial track to carry out punching press with etching on the surface subsequently.Reasonable scheme be the track on the stamping machine be 0.1 micron dark and about 1.5 microns wide.

The parallel-plate hydropress is used for the orbit information on the stamping machine is stamped on the plasticity thin plate.Staking punch preferably will be heated to 180 degree approximately Celsius, and pressure is adjusted to 150 pounds per square inch.All the punching press time is about 30 seconds.Carry out after the punching press, the plasticity thin plate that is covered with metal can separate with stamping machine, and cools off.The accurate mirror version that stamping machine will appear in resulting device is expected.

The numerical information of the micron size that the diode laser read/write system can be used for ablating is write on the formed plastic composites that is covered with metal.

Recall factor with the laser power of about 10 milliwatts and the about 1000 nanoseconds point that pulse width produced is estimated to be greater than 30 to 1.Concerning this system, the minimum limit value of the laser power of writing will be controlled at about 1 milliwatt.This minimum limit value is the function of film thickness.The power magnitude of reading light should preferably remain below 0.1 milliwatt.

The microscopic analysis of expecting these points shows that level and smooth concave point well places on the track.

Example 8

Being similar to example 1 described polycarbonate substrate contains the metal alloy film that thickness that percentage by weight is respectively tin/bismuth/copper of 75/20/5 is about 200 dusts with one deck and covers.

Use etching from the teeth outwards that the formed plasticity thin plate that is covered with metal of digital metal stamping machine punching press of helical or radial track and numerical information is arranged then.Stamping machine preferably includes the degree of depth and is about 0.1 micron, width and is about 1.5 microns track, and the dark about 0.13 micron concave point and/or the salient point (0.8 micron of diameter) that are positioned at these track tops.

The parallel-plate hydropress is stamped into the orbit information on the stamping machine on the plasticity thin plate.Staking punch is heated to 180 degree approximately Celsius, and pressure is adjusted to 150 pounds approximately per square inch.All the punching press time is expected to be about 30 seconds.Carry out after the punching press, the plasticity thin plate rain stamping machine that is covered with metal separately and cool off.Formed device will show the mirror image reflection of stamping machine.

The diode laser read/write system can be used for numerical information is write on the formed plastic composites that is covered with metal with the form of ablating micron size.

Use laser power and about 1000 nanoseconds pulse width of about 10 milliwatts, estimate that the surpassing of read rate of these points 30 to 1 can measure.

System hereto wishes the minimum limit value of about 1 milliwatt of the power can monitoring laser write, and this minimum limit value estimates it is the function of film thickness.The power level of reading light should remain below 0.1 milliwatt well.

The microscopic analysis of believing these points will show that level and smooth concave point determines in track well.

Example 9

Be similar to example 1 described polycarbonate substrate and be used as substrate.

The digital metal stamping machine punching press that helical or radial mode track is arranged with etching on the surface is the polymerization thin plate of overlay film not.Include about 0.1 micron dark, about 1.5 microns wide tracks on the stamping machine, and have about 0.1 micron dark concave point and/or salient point (diameter is approximately 0.8 micron) to be positioned at the top of track.

The parallel-plate hydropress is used for the orbit information on the stamping machine is stamped on the plasticity thin plate.Staking punch is heated to 180 degree approximately Celsius, and pressure is adjusted to 150 pounds approximately per square inch.All the punching press time is estimated to be about 30 seconds.Carry out after the punching press, formed plasticity thin plate is separated with stamping machine and cool off.Formed device expectation can show the accurate mirror image reflection of stamping machine.

This substrate can cover with the thick metal alloy film that percentage by weight is respectively tin/bismuth/copper of 75/20/5 that contains of about 200 dusts of one deck.This coating passes through the Bill of alloy in routine.Carry out heating and gasifying rapidly in the Zha Er vapor deposition device and produce.

The diode laser read/write system can be write the numerical information of micron size on the formed plastic composites that is covered with metal level with the method for ablating.

Use laser power and about 1000 nanoseconds pulse width of about 10 milliwatts can make these reproductions of putting generation than surpassing 30 to 1.System hereto, the minimum limit value of laser Writing/Reading power estimates it is to be about 1 milliwatt.This minimum limit value is the function of film thickness.The power magnitude of reading light preferably remains on below 0.1 milliwatt.

The microscopic analysis of these points will show that level and smooth concave point places track well.

Below these examples the production of completed CD and whole assembling process of packing are described, although in fact do not carry out.

Example 10

The polycarbonate ball of optical grade is squeezed into a thin slice under the indoor cleaning condition.Formed thin slice is about 1.2 millimeters thick, about 16 centimetres wide.Birefringence by this thin slice is less than 100 millimicrons.

This thin slice in a continuous metal deposition system by coated with metal level.This metal level is by containing the alloy composition that percentage by weight is respectively tin/bismuth/copper of 75/20/5.

This polycarbonate sheet that is covered with metal is carried out punching press with a continuous feed stamping system subsequently.Stamping machine comprises the information with user's compatible mode of mini disk.The temperature of punching press chamber is about 110 degree Celsius, and all the punching press time is about 4 seconds.

During punching press, dish can be downcut from thin slice, wrap layer protective layer and packing then.

This dish is applicable to read-only optical memory.

Example 11

The polycarbonate of optical grade or polyester ball are squeezed into a continuous belt.Thick about 0.2 millimeter of formed belt, wide about 1.5 centimetres.

Belt overlay metallization in a continuous metal deposition system then, this metal is the alloy of tin/bismuth/copper, percentage by weight is respectively 75/20/5.

This polycarbonate band that is covered with metal carries out punching press with a continuous feed stamping system.Stamping machine includes the track and the numerical information of the formation consistent with the optical storage effect.The temperature of punching press chamber is about 110 degree Celsius.

Then this band is wrapped layer protective layer, and packing.

This belt is applicable to writes optical memory and read-only optical memory again.

Example 12

With a diameter is that 5.25 inches polycarbonate disc carries out injection molding, to form the substrate of polymerization.Formed dish is about 1.2 millimeters thick.Comprise a liner that the track of spiral is arranged at surface etching in the mould.

This substrate is with thick being respectively the metal alloy film that tin/bismuth/copper of 75/20/5 forms by percentage by weight and covering of about 200 dusts of one deck.This coating forms by the rapid heating and gasifying of alloy.Electron scanning micrograph will show that a continuous metal alloy film entirely covers the surface of dish.On the metal surface, cover one deck polypropylene glued membrane then.Formed dish can be used as memory write again.

Example 13

Be similar to example 1 described polycarbonate substrate and can be used as substrate.

The polymerization thin slice that this no coating of digital metal stamping machine punching press of helical type track is arranged with etching on the surface.Comprise have an appointment 0.1 micron dark, 1.5 microns wide guide rail and about 0.3 micron dark hyporeflexia point (diameter is about 0.8 micron, is positioned at the top of guide rail) on the stamping machine.

The parallel-plate hydropress is used for the guide rail information on the stamping machine is stamped on the plastic foil.Staking punch is heated to 140 degree approximately Celsius, and pressure is adjusted to 120 pounds approximately per square inch.All the punching press time is about 15 seconds.Carry out after the punching press, plastic foil is separated with stamping machine and is cooled off, and covers with layer of metal subsequently.Formed device shows the accurate mirror image reflection of stamping machine.

Example 14

One deck through the polyester film of 100 micron thickness of precleaning by the optics of metals covering that percentage by weight is respectively tin/bismuth/copper of 70/25/5 that contains with skim (about 500 dusts).This coating forms with conventional vapor deposition technology.

The polymer composites that is covered with metal carries out punching press with stamping machine, adhere to then on the poly-carbonic acid film thin slice and form sandwich construction, dish type or similarly optical storage can above it, downcut or punching press is come out.

Example 15

The polycarbonate ball of optical grade is squeezed into thin slice under the indoor conditions of cleaning.About 1.2 millimeters thick of formed thin slice, about 16 centimetres wide.Birefringence by thin slice reduces 100 millimicrons.

Dish is downcut from thin slice, carries out metal deposition then in metal deposition system.Metal level is by the alloy composition of tin, bismuth and copper, and its percentage by weight is respectively 70/25/5.

Be covered with the polycarbonate dish of metal with the punching press of continuous feed stamping system.Stamping machine has the information that adapts with CD user.The temperature of punching press chamber is about 110 degree Celsius.All the punching press time is about 4 seconds.

This dish can cover with protective seam subsequently and covers and pack.It is applicable to read-only optical memory.

Below example 16 be done to 23.

Example 16

With one 1 * 10 ^-3The thick glass sheet of rice is as substrate.This substrate covers with the thick metal alloy film that percentage by weight is respectively tin/bismuth/copper of 75/20/5 that contains of-220 dusts.This coating is by with the Bill of alloy in routine. in the Zha Er vapor deposition device promptly heating and gasifying form.The lead test specimen of one 0.02 grammes per square metre of alloy electric current with 120 amperes in one 1.5 centimetres tungsten disc carries out ohmic heating.Basic pressure in the system is 8 * 10 ^-6Mm Hg.The speed of thin film deposition and thickness are monitored with the vibrating quartz crystal sensor.

The diode laser read/write system of use-case 3 is ablated to micron-sized numerical information on the glass sheet that is covered with metal.The reproduction of the data of being write shows high read rate.

Example 17

With one 3 * 10 ^-3The thick organic glass thin slice of rice is as substrate, and it cleans with methanol aqueous solution.This substrate covers with the thick metal alloy film that percentage by weight is respectively tin/bismuth/copper of 73/25/2 that contains of one deck 150 dusts.These coating use-case 16 used hot gas methods form.

The diode laser read/write system of example 3 is used for the numerical information of micron order size is ablated in the organic glass thin slice that is covered with metal level.The ratio that high conversion of signals is a sound is expressed in reading of numerical information.

Example 18

With the polishing aluminium sheet as substrate.This substrate is that the metal alloy film that percentage by weight is respectively tin/bismuth/copper of 75/20/5 that contains of 140 dusts covers with a layer thickness.The hot gas method of coating use-case 16 forms.

The diode laser read/write system of example 3 is used for the numerical information of micron order size is ablated on the aluminium sheet that is covered with metal.The signal list of this test specimen reveals corresponding to laser-light write information and has higher reflectivity.Shadow surface and not the reflection potential between the shadow surface show hard contrast.

Example 19

With the test specimen of the cyanuric acid salt polymkeric substance (thermosetting) of 5 * 10 meters thick cast as substrate.This substrate covers with the thick metal alloy film that percentage by weight is respectively tin/bismuth/copper of 75/20/5 that contains of 220 dusts.The hot gas method of this coating use-case 16 forms.

The diode laser read/write system of example 3 is used for the numerical information of micron order size is ablated on the thermosetting dish that is covered with metal.The contrast height.

Example 20

With 0.5 * 10 ^-3The thick epoxy resin diaphragm of rice is as substrate.This substrate covers with the thick metal alloy film that percentage by weight is respectively tin/bismuth/copper of 75/20/5 that contains of one deck 205 dusts.The hot gas method of this coating use-case 16 forms.

The diode laser read/write system of example 3 is used for the numerical information of micron order size is ablated on the epoxy resin that is covered with metal.The contrast height.

Example 21

One group 5 * 10 ^-3The polycarbonate thin slice that rice is thick is used as substrate material.Several substrates cover with the metal alloy film of about 50 dusts to 300 dusts, and metal alloy is made up of tin, bismuth and copper, and percentage by weight is respectively 75,20 and 5.The hot gas method of coating use-case 16 forms.The reflectivity that formed test specimen records show reflecting properties approximately from 20% up to 90%.

Being different from example 3 described diode laser read/write system is used for the numerical information of micron order size is ablated on the glass plate that is covered with metal.Laser aid comprises the Sharp LT015MT semiconductor laser of 20 milliwatts that intensity is adjustable.It is exported through overcorrect, focuses on imaging on the plastic composites that then is being covered with metal.Light source is in the imaging of the side of test specimen correspondence, and the light of reflection is by the telephotography machine testing.The point that is produced by laser beam is detected as the point of the hyporeflexia in the material (for example hole) by video camera.

The power of laser beam and pulse width change with the various metal/polymer composite material of studying, and the minimum limit value ground of writing is also determined thereupon.This result is representational for industrial system.Recording layer can be by about 50 millimicro joules, and 50 nanoseconds pulse writes.

Example 22

With 3 * 10 ^-3The thick organic glass thin slice of rice is as substrate, substrate with one deck 150 dusts thick contain the metal alloy film covering that percentage by weight is respectively tin/bismuth/copper of 75/20/5.The radio frequency spraying technique that this coating is used in the argon plasma forms.Film thickness is determined by the reflection system of measuring.

The diode laser read/write system of example 3 is used for the numerical information of micron order size is etched on the polymer flake that is covered with metal.It has high-contrast.

Example 23

With 3 * 10 ^-3The thick organic glass thin slice of rice is as substrate, substrate with 150 dusts thick contain the metal alloy film covering that percentage by weight is respectively tin/bismuth/copper of 71/25/4.Hot gas method in this coating use-case 16 is made.

The diode laser read/write system of example 3 is used for the numerical information of micron order size is etched on the organic glass thin slice that is covered with metal.It has high-contrast.

Example 24

With 3 * 10 ^-3The thick polymerizable aromatic hydrocarbon carbonic ether multipolymer of rice is as substrate, substrate with 200 dusts thick contain the metal alloy film covering that percentage by weight is respectively tin/bismuth/copper of 75/20/5.Same hot gas technology described in the coating use-case 16 is made.

Diode laser read/write system in the example 3 is used for the numerical information of micron order size is etched into through in the polymer flake of overlay metallization.Data read the level that high conversion of signals becomes sound that shows.

Example 25

With 3 * 10 ^-3What rice was thick uses the reinforced glass fibre of polypropylene as substrate.Substrate contains the metal alloy film that percentage by weight is respectively tin/bismuth/copper of 75/20/5 with one deck and applies plating.This coating is used with example 16 described identical hot gas technology and is made.

Diode laser read/write system in the example 3 is used for the numerical information of micron order size is etched on the polymer flake of the deposited plating of metal.Data read the level that high conversion of signals becomes sound that shows.

Example 26

With 6 * 10 ^-3The thick green stone ceramic of rice is as substrate.Substrate applies plating with the thick metal alloy film that percentage by weight is respectively tin/bismuth/copper of 75/20/5 that contains of 220 dusts.Coating is used with example 16 described identical hot gas technology and is made.

Diode laser read/write system in the example 3 is used for the numerical information of micron order size is etched in the polymer flake of the deposited plating of metal.Data read the level that high conversion of signals is a sound that shows.

Example 27

With 3 * 10 ^-3The thick organic glass of rice is as substrate, and substrate covers with the thick copper film that forges out of 20 dusts.Then the compound of substrate and copper is applied plating with the thick metal film that percentage by weight is respectively tin/bismuth/copper of 75/20/5 that contains of one deck 200 dusts.This coating is used with the identical hot gas method described in the example 16 and is made.

Diode laser read/write system in the example 3 is used for micron-sized numerical information is etched in the polymer flake of the deposited plating of metal.Data read the level that high conversion of signals becomes sound that shows.

Although the optimum implementation that the present invention announced is clearly through the advantage and the above-mentioned characteristic that are provided are provided, estimate that the present invention is easy to improve, change and change, and do not break away from the scope of application of additional claim or suitable meaning.

Claims (9)

1, a kind of manufacture method of optical storage medium is characterized by and comprises:

Make the substrate of sheet shape with polymeric material;

On a surface of described shape substrate, add even metal alloy firm coating, described metal alloy coating provides and has been combined in described on-chip high reflection uniform outer surface securely, and described metal alloy coating is made of the alloy of selecting in the alloy with following percentage by weight composition: Sn (5-95), Bi (5-95) and Cu (0-40); Sn (5-95), Bi (5-95) and Ag (0-49,9); Sn (70-75), Bi (20-25) and Cu (0-5); Zn (5-95), Cd (5-95) and Ag (0-49,5); Zn (5-95), Cd (5-95) and Mg (0-10); Bi (5-95), Cd (5-95) and Ag (0-49.5); Sn (40-94), Sb (3-30), Bi (3-37) and Cu (0-40); Sn (8 or more), Bi (8 or more) and by the mixing of Mg, Au, Fe, Cr, Mn, Cu, Ag and Ni or wherein a kind of, and the content of Bi any greater than among Mg, Au, Fe, Cr, Mn, Cu, Ag and the Ni; Sn (25-90), Bi (8-60) and Cu (1-25);

Have the plate-shaped substrate sections of coating to carry out thermoforming continuously with described then, so that become to stamp out the track of reservation shape thereon, described thermoforming work has successional mode and carries out to keep covering described emtal alloy film on the predetermined configuration;

Described part through punching press is downcut from described thin type substrate;

For the surface of described film metal alloy clad provides layer protective layer.

2, optical storage medium manufacture method according to claim 1 is characterized by: but also be included in along forming discontinuous record coding information in the described emtal alloy film of described track.

3, optical storage medium manufacture method according to claim 2 is characterized by: described point of discontinuity is included in concave point and the salient point in the described emtal alloy film coating.

4, optical storage medium manufacture method according to claim 3 is characterized by: describedly form with ablating technics for continuity point, described protective seam is provided then.

5, optical storage medium manufacture method according to claim 4 is characterized by: described point of discontinuity forms with the light beam of high order focusing.

6, optical storage medium manufacture method according to claim 1, it is characterized by the step that comprises increase: thin uniform copper metal coating is applied on the surface of described substrate, and then will approaches even metal alloy coating and be applied on the described thin uniform copper metal coating.

7, the method made of optical storage medium according to claim 1, described coating layer ranges in thickness at 80 dusts between 320 dusts.

8, according to the method for making at the described optical storage medium of claim 1, described coating layer ranges in thickness at 200 dusts between 320 dusts.

9, optical storage medium manufacture method according to claim 1, described coating layer ranges in thickness at 260 dusts between 320 dusts.

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