TW200419567A - Optical recordable medium and process of recording thereon - Google Patents

Abstract

An optical recordable medium at least comprises a recording layer formed on a transparent substrate. The recording layer is sequentially formed on a first transparent layer, a semi-reflective layer, a dielectric layer, a reflective layer and a material layer. When a modulated writing beam irradiates the recording layer and data is written in a recorded area, the first transparent layer and the semi-reflective layer react to form a second semi-reflective layer. When a reading light irradiates the recorded area, the light wave phase is shifted and the recorded area becomes anti-reflective.

Description

200419567 V. Description of the invention (l) The technical field to which the invention belongs The present invention relates to a structure of an optical recordable medium (opticai ecordable media) and a recording method thereof, an optical disc made of inorganic materials, About-record. For the prior learning method, the previous technology m: (Recordable Disc) has gradually saved the media and has become an indispensable storage medium for modern people due to its advantages such as easy storage and low cost. Recording discs are shaped with organic dyes. # # 的 可 rn # 4 ± ^ ^ Η ^ τ ^ The 5th recording layer is turned on, and the organic dyes are converted to receive light at a specific wavelength. Therefore, 2 A light beam of a predetermined wavelength writes data. However, — the special recording layer will continue to absorb the special #, formed by ^ using organic music materials. The wavelength of light with a special wavelength is gradually limited, and when the life of a recordable disc made of an organic dye has a source, the life of a recordable disc is shortened. There are still two problems with the line of :: other 'organic dyes, and that's the applicability to the ancient high-speed discs. For organic dyes with a large size, it is quite difficult to apply the organic dyes to the grooves by spin coating (Spin oaing). 200419567, Description of the invention (2) In addition The bottlenecks encountered on pages and pages. Wen's data recording density also needs a faster recording speed to increase. Two a 'a is, for organic dyes, so the data is recorded at a high speed ^ ° has been recorded It is quite difficult to achieve a balance between stability. Therefore, some inorganic materials have been developed to make recording layers for recordable discs. Since the release / loss of organic dye discs has increased the data recording density and the recording speed, inorganic materials have been developed. The formed recording layer does not write data by irradiating it with a beam of a specific wavelength, and records the data by phase change of the inorganic material with the energy in the beam. For example, U.S. Patent Nos. 445 丨 9 丨 4 and 4 As disclosed in No. 4 5 1 91 5, a writing laser beam is used to form a hole in a reflective recording layer, thereby forming an anti-reflection-type ablation recordable disc. Another example is the double layer alloy method (Alloying of Bi layer) disclosed in U.S. Patent No. 44991 78, which uses two layers of materials containing different metals to form a alloy under laser irradiation to change the reflection characteristics. Another example is the U.S. Patent No. 5 1 88 923 discloses the formation of a non-continuous island-like metal layer over the substrate. The part where the data is not written is in an anti-reflective state. The data is written by a laser beam, and the discontinuous island is The metal layers will be connected to form a strongly reflective metal layer. As disclosed in U.S. Patent Nos. 445 1 91 4 and 4451 9 1 5, the $ Hero recording method of a dissolvable disc recordable disc is as follows: On the recording layer, data is written by laser burning out the holes. The material of the recording layer originally located at the hole position is stacked on the recording layer on both sides of the hole to form a protrusion. The recording layer is a reflection sound, and the hole is formed At a penetrating position, the protrusions cannot be uniform as the recording layer, and there will be scattering. This will cause difficulties in the interpretation of the data, and it will be easy.

200419567 Invention description (3) An error occurred. The double layer of the US patent No. 4,499,178 is 200 milliwatts to 400 milliwatts. At present, the writing energy required is generally as high as this energy, and the conventional multi-== writer cannot provide it. High energy write mode. Other materials are not suitable for use in such a way as disclosed in U.S. Patent No. 5,188,923, which will not form a reflective metal layer. Although the iron / island-like metal layer has a high melting level, there are still other problems. The design of the energy-non-recordable disc of this patent is generally as writeable. The beam is destroyed by reflection and deafness is highly reflective. The advantage of a general recordable disc is that the disc is bad. " No, if there is a flaw, the anti-reflection part on the right indicates that the disc = eliminated. The US Pat. No. 5 1 88923 reveals the opposite. The nature is exactly the opposite of the conventional one,-the reflection of the film is extremely difficult, which ★ s said that the detection of disc defects in the disciples of the princes has become quite difficult, but the recordable discs sold on the market are the reason for the strong reflection when the data is not written. The shortcomings of the present invention are actually inorganic recording type. The film name structure has some shortcomings. In this regard, the Zhuyue, ,,, and recording methods disclosed in the present invention overcome the conventional shortcomings described above. SUMMARY OF THE INVENTION Recordable discs made of inorganic materials cannot be overcome at the same time

Page 7 200419567 V. Description of the invention (4) In view of the shortcomings, the recording medium and the recording method of the recording media are based on the present invention. The object of the present invention is to provide an optically configurable film design. Disadvantages of coating materials and various items. In order to achieve the purpose of writing once, and not having the aforementioned t: to provide a kind of optical recordable medium and its recording method, a low-energy light beam can be used for writing. Gu = Yueren aims to provide an optical recordable medium and its recording. Judge II: II. The current read / write specifications of optical disc players (CD_R or DVD-R) and the future demand for optical recording media from the south. The purpose of this book is to provide _ optical recordable media and its recording side, which have the same reflectivity, low write power, high signal modulation (Hi Signal Signal Modulation), and conventional discs. An optical recordable medium provided with the same modulation polarity (Modulation Polarity). Please refer to Fig. I. Fig. 1 & shows a cross-section of the optical recordable medium disclosed in accordance with the present invention. schematic diagram. The optical recordable medium has at least one recording layer 200. The structure of the recording layer 200 is located on a transparent substrate 202, and includes a transparent layer 204, a semi-reflective layer 206, a dielectric layer 208, a reflective layer 210, and a material layer 212 in this order. The material of the 'transparent layer 204 can be metal, metal alloy, semiconductor material, metal phosphide, and metal arsenide. The material of the transparent layer 204 may be selected from the group consisting of silicon, germanium, filled germanium, filled indium, gallium arsenide, indium arsenide, gallium alloy, silver indium alloy, and any group thereof. The thickness of the transparent layer 204 is between about 1 nm and 200 nm. The material of the semi-reflective layer 2 06 can be metal, and in particular, can be selected from silver,

V. Description of the invention (5) Aluminium, gold, chromium, copper, indium, iridium, nickel, platinum, germanium, tin ^ Any alloy of any combination thereof, and any group and composition group thereof The thickness is about 5 nanometers to! 〇〇nm. The reflective layer can also be a metal, in particular, it can be selected from the group consisting of silver, indium, / ,, indium, iridium, metal, metal, copper, metal, tin, group ^, copper ^ and any combination thereof. Ethnic group. The reverse group sums between 300 and 300 nanometers. The thickness of the baffle reflective layer is between] Nai. In addition, the material of the dielectric layer 208 is selected from the group consisting of oxides, sulfides, and any groups and groups of them. The material of the dielectric layer 208 may be an organic interposer. And its thickness is between about 1 nanometer to dazzling bei 焱 only dazzling ^ ύ υ υ not wood. Material layer 2 1 2 can,-Bao Erman layer, "can be a protective layer of other material layers, and material layer 212 can be another transparent adhesive substrate. Please refer to Figure 2, Figure 2 is a drawing The cross section of the optical media disclosed in the present invention after writing data is shown in FIG. 4 and the figure is shown. When a writing beam 300 is irradiated to record 302, a reflective layer 306 and a transparent layer 304 will generate the semi-reflective layer 314 caused by the writing beam. The generation of the semi-reflective layer 314: the phase shift of the light wave when the term beam is irradiated will reverse the reflection characteristics of the recording layer. An optical recordable medium is provided, and the writing beam required = the monthly b is between about 5 watts and 30 milliwatts, depending on the thickness of the designed material layer =. The reflectivity of the recording layer is between Adjustment between 〇2 and 〇65 before and after writing

Bigger than 0.6. And the carrier-to-noise ratio (Carrier — Noise r τ A / 1 η d L, J can generally reach 60dB. 200419567 V. Description of the invention (6) This invention = the principle of using a beam of light for different The thickness of the material is different: transmittance (reflectance). When the semi-reflective layer 306 and the transparent layer 304 react with the energy of the incoming beam, a semi-reflective layer is generated. At the part where no data is written, read When the light beam is irradiated, the sub-reflective layer 310, the semi-reflective layer 306, and the transparent layer 304 generate a fraction of the reflective shell material. Only the semi-reflective layer 3 丨 4 and the reflective layer 3 丨 produce a reflection. The total thickness of the dielectric layer 3 008 that is generated and located below it = the phase shift of the light wave generated when taking the beam skin and inverts the characteristics of the recording layer. = Change the heat transfer characteristics of the film layer to reduce the recording point The error μ can be adjusted on the transparent layer, such as a layer of dielectric material, to adjust the heat transfer mode. In order to improve the reflectivity of the recording layer, it can be used to increase the recording layer before the transparent layer. The goal of the reflectivity = one, ^, can form a transparent between the dielectric layer and the semi-reflective layer & The transparent layer of ^ 达成 can also achieve the effect of improving the heat transfer of the recording film layer and reducing the false judgment rate of the recording point. ί t Γ The thickness of each material layer of the exposed road can be adjusted as required. Because the newly generated reflection 氺 = due to the irradiation of the writing beam, the total thickness of the dielectric layer will cause the reading beam to irradiate the two displacements and reverse the reflection characteristics of the recording layer. Therefore, the upper and lower sides are only For example, for example, you can adjust the material of each material ΐ 祖 # disc is anti-reflective or low-reflective when no data is recorded. After the entry, it becomes a strong reflection state, and its writing beam There will be 3 layers in the layer due to writing, and the reading will be 3 in the writing. The reflection judgement made by the half sum is δ, and it is better to plate a bright layer when it is recorded. The thickness of the layer is

200419567

As low as 1¾ watts. The required thickness of each material layer may not be within the foregoing range, but this still belongs to the patent scope disclosed by the present invention. Embodiments In order to make the optical recordable medium and the recording method provided by the present invention clearer, some preferred embodiments are provided as described below. Embodiment 1 Referring to FIG. 1, this optical recordable medium has at least one recording layer 200. The recording layer 200 is located on the transparent substrate 202, and its structure includes a transparent layer 204, a semi-reflective layer 206, a dielectric layer 208, a reflective layer 210, and a material layer 2 12 in this order. The transparent substrate 202 is a polycarbonate (PC) substrate having a thickness of about 1-2 cm. The transparent layer 204 is a thin layer of silicon material having a thickness of about 10 nm to 100 nm. The semi-reflective layer 206 is a gold metal layer having a thickness of 7 nm to 30 nm. ; I electrical layer 208 is a zinc sulfide-silicon oxide composite thin layer with a thickness of 10 nanometers to 5 nanometers. The reflective layer 210 is a thin aluminum metal layer having a thickness of about 10 nm to 100 nm. The material layer 2 1 2 is a protective layer. A commercially available read and write beam wavelength of 780 nanometers is used for electrical test (Dynamic Test), writing is performed at 4 times the speed, and the writing power is between 14 watts and 20 watts. . As a result, it was found that the reflectance of the recording layer was between 0.2 and 0.65, and the maximum modulation was more than 0.6. In addition, it was found in the test that the carrier-to-noise ratio of the disc as described above can be above 45 cores. 200419567 V. Description of the invention (8) ------- Example 2 凊 Referring to FIG. 1, this optical recordable medium has at least one recording layer 200. The recording layer 200 is located on the transparent substrate 200, and its structure sequentially includes a transparent layer 204, a semi-reflective layer 206, a dielectric layer 208, a reflective layer 210, and a material layer 212. The transparent substrate 202 is a polycarbonate (PC) substrate having a thickness of about 0.6 cm. The transparent layer 204 is a thin layer of silicon material having a thickness of about 0 nm to about 0 nm. The semi-reflective layer 20 6 is a thin gold metal layer having a thickness of about 7 nm to 30 nm. The dielectric layer 208 is a zinc sulfide-silicon oxide composite thin layer 'dielectric layer 208 having a thickness of about 10 nm to 150 nm. The dielectric layer 208 may also be an organic dielectric material. The reflective layer 210 is a thin aluminum metal layer having a thickness of about 10 nm to 100 nm. The material layer 212 is also a polycarbonate (pc) substrate having a thickness of about 0.6 cm. The Pulsetech DDU-1000 was used to write at a speed of 1x for electrical characteristics testing. The read and write beam wavelength was 650 nm, and the writing power was between ^ mW and 20¾W. As a result, it was found that the reflectivity of the recording layer is between 0.2 and 0.65, and the modulation can reach a maximum of 0.6 or more. In addition, it was found in the test that the carrier-to-noise ratio of the disc as described above can be more than 60dB. Embodiment 3 Referring to FIG. 1, this optical recordable medium has at least one recording layer 200. The recording layer 200 is located on the transparent substrate 202, and its structure includes a transparent layer 204 and a semi-reflective layer 206 in this order. Dielectric layer 20 8, reflective layer 210 and material

Page 12 200419567

Layer 212. Among them, the transparent substrate 200 is a polycarbonate (PCj substrate having a thickness of about 1.2 cm. The transparent layer 204 is a thin layer of silicon shell having a thickness of about ˜100 nm to ≦ 100 nm. A half The reflective layer 206 is a thin gold metal layer with a thickness of about 7 nm to 30 nm. The dielectric layer 208 is a thin zinc sulfide silicon oxide composite layer with a thickness of about 10 nm to 150 nm. The reflective layer The thickness of 21 ° is about 10 nm to 100 nm, and the material of the reflective layer 2 10 is selected from the group consisting of silver, aluminum, gold, copper, any combination thereof, and any combination thereof. The composition group. The material layer 2 丨 2 is a protective layer. The electrical characteristics are tested with a commercially available read-write beam wavelength of 780 nanometers. Test, write at 4 times the speed, write power Between 丨 丨 milliwatts and 20 * watts. It was found that the reflectivity of the recording layer was between 〇2 and 〇65, and the maximum modulation was 0.6 or more. In addition, it was found in the test that The carrier-to-noise ratio of some of the test discs mentioned above can be more than 45dB, and the highest can reach

Embodiment 4 Referring to FIG. 3, this optical recordable medium has at least one recording sound 400. The recording layer 400 is located on the transparent substrate 402, and its structure includes an electrical layer 403, a transparent layer 4G4, a semi-reflective layer 4G6, a dielectric layer 4Q8, a reflective acoustic 410, and a material layer 412 in this order. The transparent substrate 400 is a polycarbonate substrate (PC) having a thickness of about 0 J meters. The transparent layer 400 is a thin layer of silicon material having a thickness of about 10 nanometers to 100 nanometers. The semi-reflective layer 406 is a thin layer of gold metal with a thickness of about 7 mils to nanometers. The dielectric layer 408 is a zinc sulfide-silicon oxide composite thin layer having a thickness of about 10 nanometers to 15 nanometers. The dielectric layer 408 may also be an organic J.

Page 13 200419567 V. Description of the invention (10) G mass II = 410 is an aluminum metal layer with a thickness of about 10 nm to 100 nm. The material layer 412 is also a polycarbonate (polycarbonate) substrate having a thickness of about 0.6 m. The function of the dielectric layer 403 is to improve the heat transfer characteristics of the thermal recording of the recording film layer. The material of the dielectric layer 403 is the same, but the thickness is between about 5 nm and 200 nm. The phase 408 of the injustice uses Pulsetech DDU-1 000 to write at a speed of 丨 twice the speed to perform an electrical test. The read and write beam wavelength is 65nm, and the power of the write is between ^ mW to 20%. Between tiles. As a result, it was found that the reflectivity of the recording layer is between 0 2 and the modulation can be as high as U or more. 5_2%。 And the unit length spread (Jitter) of its recording points is lower than the recording layer in Example 2 by 0.5_2%. Embodiment 5 Referring to FIG. 4, this optical recordable medium has at least one recording layer 500. The recording layer 500 is located on the transparent substrate 502, and its structure sequentially includes a semi-reflective layer 503, a transparent layer 504, a semi-reflective layer 506, a dielectric layer 508, a reflective layer 510, and a material layer 512. The transparent substrate 502 is a polycarbonate (PC) substrate having a thickness of about 0.6 cm. The transparent layer 504 is a thin layer of silicon material having a thickness of about 10 nm to 100 nm. The semi-reflective layer 506 is a thin layer of gold metal having a thickness of about 7 nm to 30 nm. The dielectric layer 508 is a zinc sulfide-silicon oxide composite thin layer having a thickness of about 10 nm to 150 nm. The dielectric layer 508 may also be an organic dielectric material. The reflective layer 510 is a thin aluminum metal layer having a thickness of about 10 nm to 100 nm. The material layer 5 1 2 is also a polycarbonate (pc) substrate with a thickness of about 0.6 cm. 200419567 V. Description of the invention (11). Among them, the function of the semi-reflective layer 503 is to improve the reflectance of the recording film layer, and Γη has recorded characteristics. The material of the semi-reflective layer 50 3 is the same as that of the semi-reflective layer _, but the degree is between about 5 nm and 100 nm. Pul setech DDU — 1 0 0 0, write at a speed of Η 立 Η, 择, 隹 / 一 # ^ 今 胜 μ, mesh m M 1 1 speed to write electrical characteristics test, write beam The wavelength is 650 nanometers, and the writing power is between 丨 millimeters and 20 watts. As a result, it was found that the reflectance of the reverse recording layer of the recording layer increased by 0.03 to 0.10, and its signal modulation reached a maximum of 〇. = 上 0 Example 6 Please refer to FIG. 5 'This-optical recordable medium has at least one recording sound 6 〇〇. The recording layer 600 is located on the transparent substrate 602, and its structure includes: a layer 604, a reflective layer 60, a transparent layer 607, a dielectric layer 608, and a reflective layer. The layer 612 ° is a 4-carbonate (PC) substrate having a transparent substrate 602 series and a thickness of about 0.6 ^ m. The transparent layer 604 has a thickness of about ^ nm to 7 meters, and the // layer / semi-reflective layer 606 has a thickness of about 7nm to an electrical layer 608 has a thickness of about 10nm to 15 . Nano & zinc-silicon oxide composite thin layer, dielectric layer 608 may also be used ;; :: mass bi-emission layer 610 is about 10 nm to 10 in thickness. Nano's inscription "bottom". The material layer 612 is also approximately approximately thick. · Polycarbonate (pc) based on 6 hairs to adjust the function of the transparent layer m to improve the heat transfer characteristics of the recording film layer, 200419567

Heat transfer characteristics during the entire recording. The material of the transparent layer 607 is the same as that of the transparent layer 604 ', but the thickness is between about 5 nm and 50 nm. Take Pulsetech DDU- 1 000 to! Write at twice the speed for gas characteristics testing. The read and write beams have a wavelength of 650 nanometers and the writing power is between 丨 丨 milliwatts and 20 megawatts. As a result, it was found that the reflectivity of the recording layer was between 02 and 65, and the maximum modulation was 0.6 or more. The unit length spread of the recording points (Jitter) is 0.5-2% lower than that of the recording layer in Example 2. As will be understood by those familiar with this technology, the above are only preferred embodiments of the present invention, and are not intended to limit the scope of patent application for the present invention; all others that are completed without departing from the spirit disclosed by the present invention Equivalent changes or modifications should be included in the scope of patent application described below. ^

200419567 Brief description of the drawings. Figure 1 shows the cross section of the optical recordable medium disclosed according to the present invention _ not intended; Figure 2 shows the optical recordable medium disclosed by the present invention after writing data. 3 is a schematic cross-sectional view of the optical recordable medium disclosed in Embodiment 4 of the present invention; FIG. 4 is a schematic cross-sectional view of the optical recordable medium disclosed in Embodiment 5 of the present invention; And FIG. 5 is a schematic cross-sectional view of an optical recordable medium disclosed in Embodiment 6 of the present invention. Description of graphical symbols: 20 0, 302, 40 0, 50 0, 60 0: recording layer 202, 402, 502, 602 ... transparent substrate 2 0 4, 304 λ 404, 504, 604, 607: transparent layer 206, 306, 314, 406, 503, 506, 606: semi-reflective layers 208, 308, 403, 408, 508, 608 ... Dielectric layers 210, 410, 510, 610: reflective layers 212, 41 2, 5 1 2, 6 1 2 ·· Material layer 3 0 0: Writing beam

Claims (1)

200419567 An optical recordable medium, the optical-recording layer, the recording layer is located in a first transparent body: less has a structure in order at least includes: above the soil bottom, the recording layer 1. a first transparent layer; a brother half A reflective layer; a first dielectric layer; a reflective layer; and a material layer, when a writing beam is irradiated with the first transparent layer to react with the first transparent layer to generate a second = said, the reflection of the first semi-reflective layer characteristic. An optically reflective recording layer described in item 2 of the patent scope of the patent layer is inverted with a reflection layer, wherein the material of the μ-shaped transparent layer is selected from silicon, germanium, germanium phosphide, phosphide steel, Deified gallium, indium arsenide, bismuth-gallium alloy, bismuth-indium alloy, and any group and group thereof. 3. The optical recordable medium according to item 1 of the scope of patent application, wherein the thickness of the first transparent layer is between about 1 nm and 200 nm. 4. The optically recordable medium as described in item 1 of Shenjing's patent scope, wherein the material forming the first semi-reflective layer is selected from the group consisting of silver, aluminum, gold, chromium, copper, steel, watch, A group of nickel, platinum, baht, rhodium, tin, tantalum, tungsten, alloys of any combination thereof, and any combination thereof. - Page 18 200419567 6. Scope of patent application 5. According to the optical recordable medium described in item 1 of the scope of patent application, the thickness of the first semi-reflective layer is between 5 nm and 100 nm. 6. The optical recordable medium according to item 1 of the scope of patent application, wherein the material forming the reflective layer is selected from the group consisting of silver, Ming, gold, chromium, copper, indium, silver, nickel, Gu, recording, recording , Tin, button, Yan, any combination of alloys and any combination of groups. 7. The optical recordable medium according to item 1 of the scope of patent application, wherein the material forming the dielectric layer is selected from the group consisting of zinc, indium, indium, tin, titanium, magnesium, stone oxide, and sulfide And any combination of them. 8. The optical recordable medium according to item 1 of the scope of patent application, wherein the material forming the dielectric layer further includes an organic dielectric layer. 9. The optical recordable medium described in item 1 of the scope of patent application, the thickness of the dielectric layer is between about 1 nm and 300 nm. 10. The optical recordable medium according to item 1 of the scope of the patent application, wherein the inversion of the reflection characteristics of the recording layer is caused by the optical wave phase shift of the reading beam due to the generation of the second semi-reflective layer . 11. The optical recordable medium according to item 1 of the scope of patent application, the material layer may be a protective layer or a second transparent substrate. Page 19 200419567 VI. Application for patent scope 1 2. The optical recordable medium described in item 1 of the patent application scope further includes forming a second dielectric layer before forming the first transparent layer, wherein the The thickness of the second dielectric layer is between 5 nm and 200 nm. 1 3. The optical recordable medium according to item 1 of the scope of patent application, further comprising forming a third semi-reflective layer before forming the first transparent layer, wherein the thickness of the third semi-reflective layer is between 5 Nanometers to 100 nanometers. 1 4. The optical recordable medium described in item 1 of the scope of patent application, further comprising forming a second transparent layer before forming the first dielectric layer, wherein the thickness of the second transparent layer is between 5 nanometers to 50 nanometers. Page 20