TW201017655A - Optical data recording media - Google Patents

Abstract

An optical data recording medium (100) is disclosed herein. The optical data recording medium (100) includes a substrate (220), and at least one groove (G) formed in a surface (222) thereof. The groove(s) (G) have a groove depth (D) ranging from about 30 nm to about 40 nm and a groove width (W) ranging from about 140 nm to about 250 nm. A reflector layer (231) having a thickness ranging from about 50 nm to about 120 nm is established on the substrate (220), and a dye coating (230) is established on the reflector layer (231). The dye coating (230) includes an absorber (239) having a light absorption maxima within a 405 nm waveband, and a contrast agent (240) configured to undergo a chemical or physical change upon receiving energy from the absorber (239) and to produce an optical contrast at the 405 nm waveband. A barrier layer (236) having a thickness ranging from about 5 nm to about 50 nm is established on the dye coating (230).

Description

201017655 VI. Description of the Invention: [Technology of the Invention 彳 々 】 】] Background The present disclosure generally relates to an optical data recording medium. Materials that produce color and/or contrast changes when stimulated by radiation are used in optical recording and imaging media and devices. Furthermore, the widespread adoption and rapid advancement of technologies related to optical recording and imaging media has created a significant increase in data storage capacity requirements for this media. As a result, optical storage technology has evolved from compact discs (CDs) and laser discs (ld) to more compact data formats (such as digital versatile discs (DVD)) and Blu-ray laser formats (BDR) (such as BLU). -RAY and high density DVD (HD-DVD)). ’’BLU-RAY” is a trademark of BLU-RAY, Inc” Essex, CT, and “BLU-RAY Disc”

Sony Kabushiki Kaisha Coip” is a trademark of Tokyo, Japan.

According to an embodiment of the present invention, an optical data recording medium is specifically provided, comprising: a substrate; at least one groove formed on one surface of the substrate, at least one groove having a range a groove depth from about 30 nm to about 40 nm and a groove width ranging from about 140 nm to about 250 nm; a reflector layer built on the substrate, the reflector layer having a range from about 50 nm a thickness of up to about 120 nm; a dye coating on the reflector layer, the dye coating comprising: 3 201017655 an absorber having a maximum light absorption in the 405 nm band; and a contrast agent Constructed to undergo a chemical or physical change in the energy received from the absorbent and to produce an optical contrast at the 405 nm band; and a barrier layer formed on the dye coating, the barrier layer having a range from A thickness of from about 5 nm to about 50 nm. According to another embodiment of the present invention, a method for manufacturing an optical data recording medium is specifically provided, the method comprising: forming at least one groove on a surface of a substrate; establishing a reflector layer on a surface of the substrate; A dye coating is formed on the layer; and a barrier layer is formed on the dye coating. According to still another embodiment of the present invention, a method for i) optically recording data or visual images on an optical data recording medium, or ii) reading optically recorded data or visual images from an optical data recording medium is specifically proposed. The method comprises: emitting i) light from a 405 nm band of a light source to capture energy by the absorber and transferring the energy to the contrast agent to form an optically readable mark on the optical data recording medium; or ii) Light from a 405 nm band of the light source is used to optically read a mark previously formed on the optical data recording medium. According to still another embodiment of the present invention, a system for recording or reading at least one of optical data or visual images is provided, comprising: an optical data recording medium; and 201017655 a recording device or a reading device At least one of which comprises a light source 'which is placed to illuminate the recording medium with light of a 4 〇 5 nm band so i) to capture the amount of the absorbent and transfer the energy to the contrast agent to form a 〇 The optical reading of the light of the 5 nm band; or fi) reading a mark previously formed on the dye coating. BRIEF DESCRIPTION OF THE DRAWINGS The features and advantages of the embodiments of the present disclosure will be apparent from the following detailed description and FIG. For the sake of brevity, reference numbers or features having the functions previously described may be described or not described in connection with other figures in which they appear. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view and a block diagram showing an embodiment of an optical disc recording system. Figure 2 is a cross-sectional view showing one embodiment of a recording medium in combination with a partial block diagram of some elements of the system shown in Figure 1; Figure 3 is a perspective view of another embodiment of a recording medium. Figure 4 is a graph depicting the relationship between the groove depths before and after recording (R8H) and the push-pull (PP) of the media prepared on a substrate having a groove depth in the range of 20 nm to 50 nm; Figure 5 is a diagram depicting the trend of push-pull and reflectivity on a substrate having 2 different groove depths as a function of groove width; and Figure 6 depicts the thickness of the reflector versus the push-pull value of a substrate having a uniform groove. effect. t Embodiment 3 201017655 DETAILED DESCRIPTION In the embodiment of the optical recording/reading medium disclosed herein, the wavelengths within the 405 11111 band are used to write and read data. It has been discovered that media/systems capable of recording/writing and reading at a wavelength δ can unpredictably utilize a contrast agent having a minimum absorption rate for recording and reading wavelengths. In this single wavelength system, the recording medium contains a component that is highly absorbed at the desired wavelength and a minimum absorption agent at the desired wavelength. The absorbed energy is transferred to the contrast agent' causing chemical and/or physical changes in the contrast agent to form an optically detectable mark that can be read at the recording/writing wavelength. It is important to understand that the dye system (including the absorber and contrast agent) and the disc structure are chosen such that the characteristics of the media are within the desired BDR specifications. The single wave band system disclosed herein is suitable for forming optically detectable marks. Although not limited to any theory 'But it is believed that the mechanism used to obtain the mark contains 1) changing the properties of the selected absorbent and the complex between the contrast agents, 2) physically changing the markable coating via the formation of the grooves (For example, the absorbent is placed in the coating), 3) physically changing the thickness of the different layers of the disc (ie, changing the depth of the read light travel distance), or a combination of 1, 2, and 3. Certain terms are used throughout the following description and claims, which refer to particular system components. As will be appreciated by those skilled in the art, different companies may refer to a particular component by different names. This file does not want to distinguish between names rather than functionally different components. Reference is made to the BLU-RAY technology. The current BLU-RAY disc (BDR) disc specifications include the following: wavelength = 4 〇 5 nm; numerical aperture (ΝΑ) = 0.85; disc diameter = 12 cm; disc thickness = 1.2 mm; and data capacity 6 201017655 223.3/25/27 GB. BLU-RAY discs can now be used to store 2 hours of high resolution video images or 13 hours of traditional video images. A blue-violet laser with a wavelength between 38 〇 nm and 420 urn and especially at 405 nm is used as the light source for the BLU-RAY disc. Another technology that uses blue light (38 〇 nm ~ 420 nm light shot) is HD-DVD and ultra-dense optical (xjdO) discs. As used herein, "band", "absorbent band," or "band" refers to the optical frequency, radiation, and/or absorption of ±30 nm of the stated value. For example, a 4〇5 nm band • contains wavelengths ranging from 375 nm to 435 nm, and the 650 nm band contains wavelengths from 620 nm to 680 nm. The term wavelength is generally used to refer to the stated value. but. When discussing the wavelength of a laser diode, the wavelength term contains the value ± 5 nm. The system disclosed here can be defined at least in part by the wave band. In one embodiment, the wavelength of the band is defined to be used to write data and read data. It is important to understand that colors can be used to refer to the bands of media and systems. For example, using 405 nm, the blue 'media with the disclosure of the writing and reading media can be called, writing blue _ A reading blue.” 9 When used, the term "contrast agent" It is defined as any material that combines with the absorbent to cause a contrast in the desired band due to physical or chemical changes. The contrast agent can be a mixture of a leuco dye or a leuco dye and a developer/developer precursor. As used herein, it is meant to absorb a wavelength of a predetermined wavelength or range (ie, a band) and transfer the absorbed energy to a contrast agent, thereby causing the contrast agent to change its chemical and/or physical structure and produce an optical The altered substance is detected. In some instances, the absorbent is selected as the developer of the colorless 201017655 dye. "Non-color dye" as used herein means a colorless or present-comparative and non-activated state which is produced in an activated state. Or change the color of the contrast or the substance of the contrast. The term "developer," and "activator" as used herein is used to describe the reaction and cause the dye to change its chemical structure and change or Get color 2 material. The term "light" as used herein includes any wavelength or band of electromagnetic radiation from any source.

The disclosed recording medium 100 (shown in Figures 1 through 3) can be used with a belt to record optical or visual images, which can then be read while exposed to a beam of light within the same band. Media 100 is generally reflective or transmissive. The media is reflective and thus is read using a reflected beam. For use with reflective media 100, the system of Figure 1 for writing and/or reading data includes an optical component 148, a light source 150 that produces an incident energy beam 152, and a pickup or optical sensing The detector 157 detects the reflected beam 154. Additionally, for transmissive media 100 (as indicated by the dashed lines in FIG. 1), the system can include a lens or optical system 600 that is coupled to a top detector 15 8 (a non-limiting example of which is a light The detector detects the transmitted beam 156, which is also analyzed for the presence of the signal agent. It is to be understood that Figure 2 shows a reduced block diagram of the read' writing system 170, which illustrates some of the same optical components as shown in Figure 1. Figure 1 also depicts a cylindrical lens 159 which is typically used for astigmatism. The reflected beam 154 is focused (or concentrated) at a different point when the disc position is moved closer or further away from the optical device in the vertical direction.枉面透8 201017655 Mirror 159 further causes beam 154 to concentrate more rapidly along one axis than the other. When the surface of the disc 100 is moved closer to or more vertically with respect to the optical device, the light intensity distribution on the photodetector 157 is changed to become almost elliptical in shape. A focus signal can be generated by dividing the photodetector 157 into four quadrants and comparing the four quadrants to maintain the focus of the laser beam 152 on the disc 1〇〇. In some embodiments, system 170 includes a light source 150 that is capable of transmitting wavelengths of writing/recording and reading (e.g., wavelengths within a 405 nm band). φ Fig. 1 also illustrates a drive motor 162 and a controller 164 for controlling the rotation of the optical disc/image medium 100. The mark (as shown at 242 in Fig. 2) can be read/detected by an optical sensor (e.g., optical pickup 157). A sensor (e.g., optical pickup 157) is placed to detect at least one readable pattern of optically detectable indicia 242 on media 100. Typically, the sensor reads the symbol 242 as the medium 100 moves relative to the sensor. The laser beam of the sensor is focused on the marked surface and detects changes in the reflected beam. The sensor converts the signal from the optical detection mark 242 and converts it into n one or more electrical signals, which can be sent to a processor 166. Processor 166 and analyzer 168 may be implemented together or additionally with a return beam 154 from a signal 165 from optical sensor 157 (such as a photodetector) to processor 166. In some embodiments, processor 166 and/or analyzer 168 processes a transmitted beam 156 from a signal 163 transmitted from optical detector 158. A display monitor 114 is also provided to display the results of this processing (generally in data format). The system may also include a computer database (not shown) that collects and stores processed/analyzed data for subsequent retrieval. Signal 165 from optical sensor 157 can be used to detect symbol 242 recorded on media 1 〇〇 9 201017655, or various tracking signals, such as push-pull signals. The pull-up signal is derived from the difference between the electrical signals from the two sides of the optical sensor divided into at least two equal parts that are tangent to the track direction. The plane on the medium 100 and the groove G (Fig. 2) structure cause the reflected light to be diffracted. As the concentrated rays move radially across the orbit, the diffracted rays have a different amount of phase interference with respect to the primary reflected light between the two sides. The pull-up signal is used for radial tracking and can also be used to detect and read small variations in the groove G (or plane). This may contain various information such as format data or speed information. Figure 2 shows a reduced block diagram of the read/write system 17 , which illustrates some of the same optical components shown in Figure 1. In particular, FIG. 2 illustrates a read/write system 170 for applying an incident energy beam 152 to a media 1 . The dye medium 100 generally includes a substrate 220 and a dye formed on a surface 222 thereof. Coating 230. In an embodiment (as shown in FIG. 2), the medium 100 includes a dye layer 230 formed on the reflective layer 231 by a reflective layer 231' directly adjacent to the substrate 220, and a dye coating layer 23 The barrier layer 236 is formed thereon, and a cover or protective layer 234 is formed between the barrier layer 236 and the beam 11 . A cover or protective layer 234 is generally known and can be written to the coating 23 and read the indicia 242 while protecting the coating 230 from scratches, soiling, and the like. Other embodiments of the media 100 need not include a protective layer 234. When present, the cover layer 234 has a thickness ranging from about 80 μηι to about 120 μηη. In a non-limiting example, the thickness of the cover layer 234 is about ΙΟΟμηι. Barrier layer 236 has a thickness ranging from about 5 nm to about 50 nm. Non-limiting examples of barrier layers 236 suitable for 201017655 include zinc sulfide, silica dioxide, cerium oxynitride oxidized hammer, or mixtures or compositions of such materials. Although not shown, it should be understood that in other embodiments, the reflective layer 231 may not be present, and in this embodiment, the dye is attached to the reflective sheet 242 and the coating (not shown). The same degree of reflection 1 · raw another 'reflective layer 231 may not exist, and the substrate 22 may be permeable

The light can be detected from the incoming beam 110 on the opposite side of the disc 242. In the embodiment including the reflective layer 231, it is to be understood that the reflective layer 231 may be composed of a material having high reflectance to the laser light, such as Mg, Se, Y, Ti, W, Mn, Re, Fe, Co,

Zr, Hf, V, Nb, Ta, Cr, Mo

Ni, RU, Rh, Pd, lr, Pt, Cu, Ag, Au, Zn, Cd, A1

Ca, In, Si, Ge, Te, Pb, p〇, Sn, Si, and/or Nd. In a non-limiting example, the reflective layer 231 is formed of Ag, Au or A1. In addition, it is to be understood that each of the reflector materials can be used alone, in a mixture, or in an alloy. The thickness of the reflector layer 231 ranges from < 5 〇 nm to about 12 〇 nm. As shown in FIG. 3, other embodiments of the media may include a dielectric interposer 238 formed between the barrier layer 236 and the cap layer 234. Additionally or in addition to the dielectric interposer 238 between the barrier layer 236 and the capping/protective layer 234, a dielectric interposer 238 (not shown) may be present between the coating 23 and the reflective layer 231. Non-limiting examples of suitable dielectric materials include those that allow the desired wavelength to be transmitted therethrough. These dielectric interposers 238 typically have a thickness ranging from about 2 nm to about 10 nm. Layers 230, 231, 234, 236 and/or 238 may be established via the desired technique, and no. 11 201017655 may include, by way of limitation, roll, spin coating, spray, lithography, splashing, evaporation, or screen printing. It is to be understood that the features of the media 100 and the dyes comprising the dye coating 230 are selected such that the formed media 100 is constructed to be written using a 405 nm band and can be read using a 405 nm band. The blue laser recording improves the I8/I8H modulation and stability of the recorded data (i.e., symbol 242) without adversely affecting the push-pull, reflectivity, and other media 100 properties. The combination of facilitated modulation and adjusted structural features (eg, reflectivity, groove depth D, groove width w) is believed to enable media 100 to record data at 405 nm bands, then at 4〇5 ® nm Waveband reading. For a particular dye, the reflectivity and push-pull can be understood, for example, by adjusting the reflectivity of one or more of the layers 100, 231, 234, 236, 238 of the medium 100 (eg, via the thickness of the reflective layer 231, the reflective material used, the reflection The concentration of the material, etc.), adjust the depth D of the groove G in the substrate 220 (as shown in FIG. 2), adjust the width W of the groove G, adjust the wall angle of the groove G, adjust the thickness of the dye coating 230, and adjust The amount of dye coating 230 filling the individual grooves G is controlled by the concentration of the dye in the entire coating 230, and/or combinations thereof. The substrate 220 for the media 100 can be any substrate on which the indicia 242 is to be created, such as in conventional CD-R/RW/ROM, DVD±R/RW/ROM, HD-DVD or BLU-RAY. The polymer substrate used for the disc. Substrate 220 can be paper (eg, a label, ticket, receipt, or stationery), film, or another surface on which mark 242 is to be recorded. The substrate 220 includes one or more grooves G formed therein. In one embodiment, a plurality of concentric grooves G are formed in the substrate 220. In another embodiment, a single spiral groove G extending from the inner diameter to the outer diameter of 12 201017655 is formed on the substrate 220. In another embodiment, a combination of concentric and spiral grooves G is formed in the substrate 220 (e.g., a plurality of individual spiral grooves G are formed in the substrate 220). The wall of the groove G can have an angle such that it has a relatively sharp end edge. For example, 'the walls may have 40 with respect to the surface of the medium 100. Or a higher angle. It is to be understood that the depth D and/or the width W of the groove G can be varied to achieve the desired push-pull signal after recording or at the read wavelength/band. For the BDR format, the push-pull signal for φ is from about 0.4 to about 0.6. It is to be understood that this push-pull signal can be achieved (in combination with other structural features disclosed herein) when the groove depth D ranges from about 3 〇 nm to about 40 nm. In another non-limiting example, the groove depth 〇 ranges from about 33 nm to about 37 nm. As mentioned previously. It is also believed that the narrow groove geometry can help achieve the desired push and pull after writing balance. As a non-limiting example, the groove width W ranges from about 140 nm to about 220 nm. In some examples, the desired groove width W ranges from about 140 nm to about 250 nm. It is believed that the groove depth D and width W disclosed herein are particularly suitable for the bdr format. Because of this, the combination of dye composition, groove depth D and/or groove width W optimizes the push-pull and modulation values to the desired level. The media 100 disclosed here is about 32μιη + 〇·〇ι. The track distance measures the nominal distance between the intervals of the information tracks on the media 1 〇 。. This gauge can be particularly adapted to the bdr format in combination with the groovedness D and visibility W discussed herein. As described in more detail below, the dye coating 230 comprises suspension, dissolution, or fine dispersion in a matrix or binder (eg, a polymerization comprising, for example, polyacrylate, polystyrene, polyene, or oleic acid vinegar). One of the substrates) forms a color 13 201017655 or a comparative reagent 240 and an absorbent present. In some instances, the contrast and absorbent are completely soluble in the coated substrate or binder 1 - the solid dye coating 230 also contains a fixative (not shown). Also, in general, the matrix material may be a woven wire suitable for dissolving and/or dispersing the absorbent and contrasting agent. Acceptable filaments (4) Refractory UV curable substrates such as propylene g|derivatives, filaments and monomers' may or may not have a light suit. The light kit may comprise a wicking species that initiates a reaction for curing the substrate, such as a diphenyl ketone derivative. Other examples of the photoinitiator for the radical polymerization and the prepolymer of the prepolymer include, without limitation, a thioxanthone derivative, an anthracene derivative, an acetophenone, and a benzoin form. Optionally, a substrate that can be cured by radiation type that is not used for writing radiation patterns can be selected. A matrix mainly composed of a cationic polymerization resin may require a photoinitiator mainly composed of an aromatic diazonium salt, an aromatic halogen salt, an aromatic phosphonium salt, and a metallocene compound. An example of an acceptable substrate comprises Nor-Cote CLCDG-1250A or Nor-Cote CDG000 (a mixture of UV curable acrylic acid acrylate monomer and a polymer) comprising a photoinitiator (base ketone) and Organic solvent acrylates (eg, 'methyl methacrylate, decyl hexyl acrylate, β-phenoxyethyl acrylate, and hexamethylene acrylate). Other acceptable matrices include acrylated polyester oligos such as CN292, CN293, CN294, SR351 (trimethylolpropane triacrylate) available from Sartomer Co., SR395 (isobutyl acrylate) Ester), and SR256 (2(2-ethoxyethoxy)ethyl acrylate). In some instances, the photochemical and/or photothermal mechanism that causes the developer to become a developer (discussed further below) is slower than when the solid substrate is below its glass transition temperature. While not agreeing to a particular theory, the photochemical reaction of solids has an energy barrier to heat the substrate above its glass transition temperature (Tg). Accordingly, in some embodiments, it is preferred to provide sufficient photothermal energy in the region of the desired mark 242 to locally heat the substrate to its glass transition temperature Tg. The Tg is typically determined by the polymer composition of the substrate and, if desired, by the choice of polymer for the substrate. In certain embodiments, the Tg will range from about 12 °C to about 300 °C. In many embodiments, the desired dye coating 230 can have a thickness equal to or less than 100 nm. To this end, spin coating is a suitable coating technique for establishing coating 230 on substrate 220. Further, a dye composition capable of forming the coating 230 to a thickness equal to or less than 100 nm can be provided as desired. In such cases, the dye coating 230 is required to have no particles which would interfere with the formation of such a thickness, i.e., no particles having a size greater than 100 nm. In some instances, the composition of coating 230 can be a complete solution whereby a molecular degree of film agglomerates is produced. Moreover, in many applications, a clear dye coating 230 can be provided as desired. In this case, any particles present in the coating 23 will have an average size of less than half the wavelength of the light transmitted through the coating. Although all of the coatings having a particle size of less than 150 nm therebetween can be used for this purpose, the coating 230 in which the marking component is dissolved as opposed to the presence of the money particles is used as desired. In addition, when the density of the dry data increases, the size or record of the data can be used for small records. Some of today's technology is available in i5〇 nm or less. For all of these reasons, the dye coating 230 is thus desirably completely indistinct to the half-larger particles of the wavelength of the Han-ray. 15 201017655 Dye coating 23 0 contains an absorbent dye 23 9 and a contrast agent 24 4 , which are selected to achieve the desired modulation of the recorded data/mark 242. As previously mentioned, the combination of absorber 239/contrast 240 enables media 100 to be written in a wavelength or band to produce indicia 242 that can be read at the same wavelength or band. When the symbol 242 is to be generated, the marker energy 110 is directed at the media 100 in a desired manner. The energy pattern can vary depending on the equipment available, the surrounding conditions, and the desired result. One non-limiting example of energy that can be used includes, without limitation, blue light (380 nm - 420 nm radiation). In this implementation, the medium 100 is directed to form a mark 242 to illuminate the light having the desired writing wavelength (or within the writing wavelength band). Absorber 239 at labeling layer 230 absorbs this energy, causing some physical and/or chemical change in contrast agent 240, resulting in an optically readable mark 242 that can read the wavelength (or within the read band). It is to be understood that the formed mark 242 can be detected by an optical sensor that emits a read wavelength or a band. It is to be understood that the color forming or contrasting agent 240 can be any substance that responds to a critical stimulus (which is typically the energy received from the absorbent 239) to perform a detectable optical change. In certain embodiments, contrast agent 240 comprises a colorless dye and a developer as detailed below (which may also act as absorbent 239). The developer and leuco dye produce a detectable optical change when chemically mixed. Typically, the concentration and distribution of contrast agent 240 within the dye coating 230 is preferably sufficient to produce a detectable mark 242 upon activation. In the embodiment where the dye coating 230 comprises a developer and a leuco dye, the two components are soluble in the matrix. In other embodiments, one of the components may be dispersed in the matrix with dispersed particles, but a homogeneous coating is preferred. 16 201017655 A dye coating 230 in which both the developer and the leuco dye are dissolved, it is desirable to avoid premature mixing of such components and to produce optical changes throughout the marking layer 230. This can be accomplished by incorporating one of the components of contrast agent 240 into dye coating 230 as a precursor to the component. In these embodiments, incident light or heat initiates a chemical change in the precursor to cause it to become a desired component. Once the desired component is formed, the two components will be present locally and a contrasting reaction will occur. Thus, if the energy of the writing wavelength/band is applied to the desired region φ domain of the marking layer 23, an optically detectable marker 242 can be generated. This can be accomplished by using a developer that is adjacent to the dye within the dye coating 23". The developer precursor does not become activated as a developer until it absorbs a stimulus to cause chemical recombination. Therefore, the developer precursor can also function as the absorbent 239. After this reorganization, it acts as a developer when it is in contact with the dye. Thus, the substrate can be provided in a homogeneous single phase solution under ambient conditions' because the use of a precursor to the developer avoids the formation of a color/contrast reaction that occurs prior to activation. • However, in other embodiments, one or the other of these components may be substantially insoluble in the matrix under ambient conditions. By substantially insoluble, it is meant that the solubility of the component of contrast agent 240 in the matrix of the surrounding conditions is too low to cause a no- or minimal contrast change due to the reaction of the dye and the precursor to the surrounding conditions. Thus, in certain embodiments, the developer is dissolved in the matrix and the dye is present in small crystals suspended in the matrix under ambient conditions; while in other embodiments the dye is soluble in the matrix and the developer is Small crystals suspended in the matrix exist in the surrounding conditions. The particle size is preferably less than 15 inches. Depending on the choice of _24〇, the labeling composition will be more or less absorptive at the wavelength/band of the desired 17 201017655. Single wavelength light for reading and writing operations typically causes contrast agent 240 to produce a relatively dark (relative to unmarked area) mark 242 for reading at the same wavelength or the same wavelength band used for writing. In many cases (including the reading and writing of the 405 nm band described herein), it is desirable and convenient to provide a comparison when used in a relatively narrow wavelength range. The contrast agent 240 of the relatively more absorbent marker 242 in the narrow wavelength range. It is extremely common to use the single-wavelength recording medium disclosed herein, the absorber 239 having a high absorptivity at a desired wavelength, and the contrast agent 240 exhibiting a minimum absorption at a desired wavelength. As used herein, a 'minimum absorption' component refers to a component having a maximum absorption at any wavelength between 200 nm and 900 nm (human *) compared to a specific wavelength having a absorption rate of less than 20%. For example, CIBA's® IRGAPHOR® 1699 has a high absorption at 650 nm and a minimum absorption at 405 nm. Similarly, a “highly absorbable” component has a wavelength of > 10,000 at maximum absorption. The component of the extinction coefficient. For example, the CI solvent yellow 93 is strong and highly absorptive at 405 nm and has an extinction coefficient of > 50,000. Therefore, one of the non-limiting examples of the 'dye coating composition is IRGAPHOR® 1699 Or other suitable metal complex dyes as contrast agent 240 and CI solvent yellow 93 as absorber 239. Other non-limiting absorption absorbers 239 at or near 405 nm (eg, from about 375 nm to about 435 nm) Examples of sex include curcumin; saffronic acid; porphyrin and its derivatives (for example, porphyrin 1 (CAS 448-71-5), octaethyl porphyrin (CAS 2683-82-1), and secondary oxime Porphyrin IX 2,4 diethylene glycol 201017655 (D6309) 'available from Frontier Scientific); azo Dyes (eg, medium orange (CAS 224370-7), methyl yellow (CAS 00-11-7), 4-phenyl azoaniline (CAS 60-09-3), and Alcinc yellow (CAS 61968-76) -1)); CI Solvent Yellow 93; CI Solvent Yellow 163; 1,3-Dimethyl-5-[2-(l-methyl-pyrrolidin-2-ylidene)-ethylidene]-pyrimidine- 2,4,6-trione; 1,3-dimercapto-5-[2-(3-methyl-oxazolidine-2-ylidene)-ethylidene]-pyrimidine-2,4,6 - Triketone, etc. Other suitable examples include 1-(2-a-5-sulfophenyl)3-methyl-4-(4-sulfophenyl)azo-2-pyrazol-5-one _ Sodium salt ("large = 4 〇〇 nm"; 7-diethylamino coumarin _3_carboxylic acid ethyl ester (λ max = 418 nm) (CAS 287 〇 5-46-6); 3, 3 '-Diethyl thiophthalate ethyl sulfate (λ max = 424 nm) (CAS 2602-17-7); 3-allyl-5-(3 ethyl-4-

Methyl-2-Arsinyl) Rhodamine (Nine Max = "ο nm) (CAS 203785-75-5), (each available from 〇rganica Feinchemie GmbH

Wolfen), or a mixture thereof. Non-limiting specific examples of suitable aluminum quinoline complexes that can be used as absorbent 239 include tris(8-hydroxyquinolinyl)aluminum (CAS 2085-33-8) and derivatives 'such as, tris(5-chloro) 8(基基琳基)• 绍(CAS 4154-66_υ ; 2-(4-(1-methyl-ethyl)-phenyl)-6phenyl-4H-thiopyran-4-ylidene)-propane Dinitrile u dioxide (cas 174493-15-3); 4,4·-[1,4_benzene-phenyl bis(13 4n_5 2 diyl)] bis-fluorene fluorene diphenylaniline (CAS 1841 (4) 8 g); bis-tetraethyl bis(1,2-cyano-monothiopentenyl) zinc (1) RCAS; or 2-(4,5-monohydromethyldithiolaneylene subunit)_4 , 5_ two gas Caiji [^] 1,3-dithiocyclopentene, all available from Sy play GmbH. As mentioned in some examples, the contrast agent comprises a leuco dye and a developer f (which may be (10) help 9). A non-limiting example of a dye coating 23 with a leuco dye pair _24 〇 and a display 19 201017655 photographic precursor absorber 23 9 includes curcumin diacetate (absorbent 239) for the 405 nm band writing method And ugly cyanine (contrast 240) for the 405 nm reading method. Specific examples of other suitable leuco dyes include fluorin and alum, which include, without limitation, the following (which may be used singly or in combination): 丨, 2_benzo-6-(N-ethyl-N-nonanilide Pyridin, 1,2-benzo-6-(N-methylcyclohexylamino) fluoran, 1,2-benzo-6-dibutylamino fluoran, ι, 2-benzo _ 6_Diethylamino fluorescein, 2-(α-phenylethylamino)-6-(N-ethyl-p-toluidine) fluorination, 2-(2,3-dianiline) 3- gas-6-diethylamino fluorescein, 2-(2,4-dimercaptoanilino)-3methyl-6-diethylamino fluoran, 2-(di-pair _ Methyl phenyl oxime amino)-6-(N-ethyl-p-toluidine) fluoran, 2-(m-tris-methylanilino)-3-methyl-6-(N-ring hexyl-N-methylamino) fluorination, 2-(m-trichloromethylanilino)-3-methyl-6-diethylamino fluorination, 2-(m-trifluorodecyl aniline - 6-diethylamino fluorane, 2-(m-trifluoromethylanilino)_3_chloro-6-diethylamino fluoran, 2-(m-trifluorodecylphenyl) _3_methyl_6_diethylamino fluoran, 2-(N-ethyl-p-nonylanilino)_3_fluorenyl_6_(N_ethyl phenylamino) Rong Xuan>, 2 (N-ethyl-p-methylamine) Base)_3_methyl_6_(N-propyl-p-tolylamino) fluoran, 2-(o-chloroanilino)-3-chloro-6-diethylamino fluoran, 2_(o _ gas anilino)-6-dibutylamino fluorane, 2-(o-o-stupylamino)_6-diethylamino aryl, 2-(p-ethyl-based basic amine)-6- (N-n-pentyl-N-n-butylamine) fluorescein, 2,3-dimethyl-6-dimethylamino-based, 2-amino- 6-(N-ethyl-2, 4 dimethylanilino) fluoran, 2-amino-6-(N-ethylanilino) fluorane, 2-amino-6-(N-ethyl-p-aniline) fluorination, 2-amino-6-(N-ethyl-p-ethylanilinyl) fluorination, 2-amino-6-(N-ethyl-p-toluidine) fluorination, 2-20 201017655 Amino -6-(yilyl-2,4-dimethylanilino) fluoran, 2-amino-6-(team methylanilino) fluoran, 2-amino-6-(N-methyl -p-chloroanilino) fluoran, 2-amino-6-(N-methyl-p-ethylanilino) fluorane, 2-amino-6-(N-mercapto-p-aniline Pyridin, 2-amino-6(N-propyl-2,4-dimethylanilino) fluoran, 2-amino-6-(N-propylanilino) fluoran, 2- Amino 6-(N-propyl-p-chloroanilino) fluoran, 2-amino-6-(N-propyl-p- Alkylamino) fluoran, 2-amino-6-(N-propyl-p-indolyl) fluoran, 2-anilino-3-chloro-6-diethylamino fluoran, 2-aniline 3-methyl-6-(N-cyclohexyl-N-methylamino) fluoran, 2-anilino-3-methyl-6-(Nethyl--N-isoamylamino ) fluorin, 2-anilino-3-methyl-6-(N-ethyl-N-phenylhydrazino)amino fluorane, 2-anilino-3-methyl-6-(N-ethyl -N-propylamino) fluoran, 2-anilino-3-methyl-6-(N-isopentyl-N-ethylamino) fluorane, 2-anilino-3-methyl- 6-(N-Isobutyl-methylamino) fluoran, 2-anilino-3-indolyl-6-(N-isopropyl-methylamino) fluoran, 2-anilino-3 -methyl-6-(N-fluorenyl-p-indolyl-) fluoran, 2-anilino-3methyl-6-(N-n-pentyl-N-ethylamino) fluoran, 2-anilino-3-methyl-6-(N-n-pentyl-N-methylamino) fluorane, 2-anilino-3-methyl-6-(N-n-propyl-N- Isopropylamino) fluoran, 2-anilino-3-indolyl-6-(N-n-propyl-N-methylamino) fluorane, 2-anilino-3-methyl-6- (N-second butyl-N-methylamino) fluoran, 2-anilino-3-methyl-6-diethylamino fluorane, 2-anilino-3methyl-6- n-Butylamino fluorane, 2-anilino-6-(N-n-hexyl-N-ethylamino) fluoran, 2-phenylisodecylamino-6-(N-ethyl-2,4 -dimercaptoanilino) fluoran, 2-phenylisoindolyl-6-(N-ethyl-p-toluidine) fluoran, 2-phenylisoindolyl-6-(N-methyl -2,4-dimercaptoanilino) fluoran, 2-phenylisoindolyl-6-(N-methyl-p-toluidine) fluoran, 2-bromo-6-diethylamino Firefly 21 201017655 alkane, 2-chloro-3-methyl-6-diethylamino fluorane, 2-gas-6-(N-ethyl-N-isoamylamino) fluoran, 2-gas -6-diethylamino fluoran, 2-nitrox-6-dipropylamino fluorane, 2-diethylamino-6 (N-ethyl-p-methylamino) turmeric 2_ monoethylamino-6-(N-mercapto-p-tolylamino) fluorescens, 2 dimethylamino-6-(N-ethyl-amino-amino) fluorination, 2-dimethylamine -6-(N-methylanilino) fluorescein, 2-monopropylamino-6-(N-ethylanilino), 2-dipropylamino-6 (N-methyl) Amine, burnt, 2-ethylamino-6-(N-ethyl-2,4-dimethylanilino) fluoran, 2-ethylamino-6-(N-methyl-pair -toluidine-based fluorination, 2-methylamino-6-(N-ethylanilino) Alkane, 2-methylamino _6_(N-methyl-2,4-dimethylanilino) fluorination, 2-methylamino-6-(N-mercaptoanilino) fluoran, 2 -decylamino-6-(N-propylanilino) fluorane, 3-(1-ethyl-2-methyl-2-indol-3-yl)-3-(2-ethoxy-4 -diethylaminophenyl)_4-heterophenone, 3-(1-ethyl-2-indolyl-3-yl)-3-(2-ethoxy-4-diethyl Amino-based K7-azabenzoquinone, 3-(1-ethyl-2-indolyl-3-yl)-3-(2-methyl-4-diethylaminophenyl)- 4-Azabenzoquinone, 3-(1-ethyl-2-indolyl-3-yl)-3-(2-methyl-4-diethylaminophenyl azaphenylhydrazine, 3_ (1_ethyl_2_methylindol-3-yl)-3-(4-diethylaminophenyl)_4_azabenzoquinone, 3-(1-ethyl 2-methylindole -3-yl)-3-(4-N-n-pentyl-N-methylaminophenyl)-4-azabenzoquinone, 3-(1methyl_2_indenylhydrazine_3- 3-(2-hexyloxy-4-diethylaminophenyl)-4-azabenzoic acid, 3-(1-ethyl-2-methylhydrazinyl-3-yl)-3- (2-ethoxy-4-ethylethylaminophenyl)-4-azapine, 3-(N-cyclohexyl-N-methylamino)-6-methyl-7-phenyl Amino fluorane, 3-(N-ethyl-N-isopentylamino)-6-methyl-7-phenylamino fluorane 3-(N_ethyl_p-toluidine)_6-methyl-7phenylamino fluorane, 3,3-bis(2-ethoxy-4-ylethylaminophenyl)-4 - 22 201017655 Azabenzoquinone, 3,3-bis(2-ethoxy-4-diethylaminophenyl)-7-azabenzoquinone, 3,6-dibutoxy fluoran, 3 ,6-diethoxy fluorane, 3,6-dimethoxyoxy fluorane, 3-bromo-6-cyclohexylamino fluorane, 3-chloro-6-cyclohexylamino fluorane, 3-di Butylamino-7-(o-gas-phenylamino) fluoran, 3-diethylamino-5-methyl-7-diphenylmethylamino fluorane, 3-diethylamine -6-(m-trifluoromethylanilino) fluoran, 3-diethylamino-6,7-dimethylfluorane, 3-diethylamino-6-methyl-7-di Toluidine fluoran, 3-diethylamino-7-(2-carbomethoxy-phenylamino) fluorane, 3-diethylamino-7-(N-ethenyl-N -Methylamino) fluoran, 3-diethylamino-7-(N-methylethyl-N-decylamino) fluorane, 3-diethylamino-7-(N-A Benzyl-N-benzylamino) fluoran, 3-diethylamino-7-(o-phenylphenylamino) fluorane, 3-diethylamino-7-chlorofluoran, 3 -diethylamino-7-diphenylmethylamino fluorane, 3-diethylamino-7-di Ethylamino fluorane, 3-diethylamino-7-N-decylamino fluorane, 3 dimethylamino-6-methoxy fluorane, 3-dimethylamino-7 -methoxy oxane, 3-methyl-6(N-ethyl-p-toluidine) fluoran, 3-piperidino-6-mercapto-7-phenylamino fluoran, 3- Pyrrolidino-6-methyl-7-p-butylphenylamino fluorane, and 3-pyrrolidino-6-methyl-7phenylamino fluoran. Other non-limiting examples of suitable fluorin-based leuco dyes for single wavelength/band systems include: 3-diethylamino-6-methyl-7-anilinofluoran, 3-( N-ethyl-p-nonylanilino)-6-mercapto-7-anilinofluoran, 3-(N-ethyl-N-isopentylamino)-6-methyl-7-anilino Cyclohexane, 3-diethylamino-6-mercapto-7-(o-p-p-dimethylanilino) fluoran, 3-decrrolidine-6-mercapto-7-anilino fluorane , 3-piperidino-6-methyl-7-anilinofluoran, 3-(N-cyclohexyl-N-methylamino)-6-mercapto-7-anilinofluoran, 3-di Ethylamino group 23 201017655 -7-(m-trifluorodecylphenylamino) fluoran, 3-dibutylamino-6-methyl-7-anilinofluoran, 3-diethylamino-6 -Chloro-7-phenylamino fluorane, 3-dibutylamino-7-(o-anilino) fluoran, 3-diethylamino _7_(o-aniline) 3-di-n-pentylamino 6-methyl-7-anilinofluoran, 3-di-n-butylamino-6-methyl-7-anilinofluoran, 3_(n_ethyl_n_ Isoamylamino)_6_methyl_7_anilinofluoran, 3-pyrrolidino-6-methyl-7-anilinofluoran, 1(3H)-isobenzoxanone, 4,5, 6,7-four gas-3 , 3-bis[2-[4-(dimethylamino)phenyl]2-(4-methoxyphenyl)vinyl] fluoran, and mixtures thereof. Aminotriaryl leuco dyes can also be used in the disclosed embodiments, non-limiting examples of which include tris(N,N-didecylaminophenyl)methane (LCV); tris(N,N_diB Aminophenyl)methane (LECV); tris(N,N-di-n-propylaminophenyl)methane (LPCV); tris(N,N-di-n-butylaminophenyl)methane (LBCV) Bis(4-diethylaminophenyl)-(4-diethylphosphino-2-methyl-phenyl)methane (LV-1); bis(4-diethylamino)_2 Methylphenyl)-(4-diethylamino-stupyl)methane (LV-2); tris(4-diethylamino-2-phenyl)phenyl (LV_3); double ( 4_Diethylamino-2-methylphenyl)(3,4-dimethoxyphenyl)decane (LB 8); an amine having a different alkyl substituent bonded to an amine moiety a triarylmethane leuco dye, wherein each alkyl group is independently selected from the group consisting of CrC4 alkyl groups; and has the structure indicated by the first month 'J (which is further substituted with one or more alkyl groups on the aryl ring) An aminotriaryldecane leuco dye of any of the formula wherein the alkyl group of the latter is independently selected from the group consisting of Ci_c3 alkyl. Any suitable developer can be used with the leuco dye. The developer desired according to certain embodiments is provided in a scalloped form which can be photochemically or transcribed into a desired scene/agent. As mentioned before, by providing the precursor type 24 201017655 = agent, the necessity to physically separate the trace from the dye is removed. ^: One of the components which are not provided with the green color of the base f. The wood and the developer precursor are soluble in the matrix. Suitable for use in the disclosed embodiments of the present invention, without limitation, ageing t-like substances (such as, for example, sulphide, di-dipropyl propyl, s-naphthalene _ _ _ _ _ _, or Any other compound of the OR group to which the aromatic ring is attached) acetic acid vinegar or benzoic acid g vinegar.

Other suitable development systems involving photochemical reactions undergo molecular recombination to become a phenyl group which lacks colorless pure image (activation). These reorganizations are sometimes referred to as Flies (pools) reorganization. It is important to understand that Flies reorganization can be driven by heat. In a certain _ example, Flis recombination (sometimes called light Flis recombination) can be performed. Both recombinations (heat and light mobilization) are within the scope of the subtracted examples, and the stimuli used for such recombination may be light, heat, or combinations thereof. In certain embodiments, suitable developer precursors comprise a compound having the formula: φ ROCOR, wherein R is an aryl group and R' is an alkyl or aryl group. The exemplified compounds include, without limitation, di-O-acetylation and di-indole benzalization of curcumin. Further, any aryl ester that absorbs or has a peak absorption wavelength ranging from about 380 nm to about 420 nm, and more particularly from about 400 nm to about 410 nm, may be a precursor of a developer suitable for use herein. These developers are precursors for a suitable absorbent 239 for leuco dyes. Other suitable ester precursors for developers include bisphenol-A, bisphenol-S, hydroxybenzyl benzoate, TG-SA (phenol, 4,4,-sulfonyl bis[2-(2-propene) Base)]) 25 201017655 and gather together. An absorbent having a modifying group as described in U.S. Patent No. 6,015,896 and U.S. Patent No. 6,025,486, the disclosure of which is incorporated herein by reference in The contrast agent 240. Such modified groups may be present on the ring, atom or ion of the center of the naphthalocyanine or phthalocyanine complex. Some examples of suitable naphthalocyanines and phthalocyanine dyes are as follows: MPc' (S〇3H)x

(S03H)x

26 201017655

27 201017655

In addition, some of the commercial dyes previously recorded for low density optical media at 650 nm and 780 nm are useful as contrast agents 240 for the high density optical media 100 disclosed herein. These dyes are particularly useful in combination with an absorbent 239 such as c.l. Solvent Yellow 93 or C.I. Solvent Yellow 163. Examples of such commercial dyes include those used in conventional DVD or CD, such as IRGAPHOR® Ultragreen MX, IRGAPHOR® LASERVIOLET, IRGAPHOR® 1699 (all available from Ciba, Tarrytown, NY). Further examples of suitable contrast agents 240 include the following: 1) in U.S. Patent No. 5,079,135, Japanese Patent No. 2,910,042 B2, European Patent No. 0376327 B1, and Hong Kong Patent No. 1007621 A1. , all of which are assigned to Sony Corporation, Tokyo, and incorporated herein by reference for reference; and 2) U.S. Patent Application Publication No. 2002/0015858 and Japanese Patent Application Publication No. 2002-002112 Both of them are assigned to Toyo Ink Mfg. Co. Ltd., Tokyo' and are hereby incorporated by reference. A source of radiation (e.g., a laser or LED) that emits light having a wavelength in the band from about 375 nm to about 435 nm can be used to develop the color forming 28 201017655 or comparative composition of the present invention. Thus, a composition that forms a color or contrast can be selected for use in launching the wavelength of the wavelength within the range. In particular, sources such as those used in certain face and laser disc recording devices emit energy at a wavelength of about 405 nm. Additional radiation absorbers adjusted to select wavelengths can be included to promote localized heating. When recording, the media is placed so that the light emitted by the laser (with wavelengths from 375 nm to 435 nm) is incident on the dye coating 23 〇 •. Laser 150 is operated to transfer sufficient energy to the surface to form indicia 242. Laser 15. And the position of the media touch is controlled by the processor 166 to cause the light to be pulsed by the laser 150 to form a pattern of the record 242 on the surface of the dye coating 23A. The pattern of the formed record 242 can also be read at wavelength/band. The performance of the media 100 is facilitated by the combination of the collector 239/contrast agent 240 and the structural disc features disclosed herein. When the recorded mark 242 is to be read, it is understood that a radiation source (e.g., a laser or LED) that emits light having a blue wavelength ranging from about 375 nm to about 435 nm can be used. The medium 1 (8) is placed again so that the light emitted by the laser 150 is incident on the surface of the mark. The laser 15 is operated such that light incident on the surface does not cause a sufficient amount of A to be transferred to the surface to cause a mark Μ]. Alternatively, the incident ray is at a larger or smaller angle from the surface of the mark, depending on the presence or absence of the mark 242. When the media 1 〇 moves relative to the laser 15 ,, the change in reflectance is recorded by the optical pickup 157, producing a signal 165 corresponding to the marked surface. The position of the laser 150 and the media 1 is controlled by the processor 166 during the read process. It is to be understood that the disclosed read/write system 170 is merely illustrative, and that package 29 201017655 contains components of this skill. Various modifications can be made, including the use of multiple lasers, processors, and/or pickups, and the use of light beams having different wavelengths. The read component can be separated from the writing component or can be combined in a single device. To further illustrate embodiments of the present disclosure, an embodiment is shown herein. It is to be understood that the examples are provided for illustrative purposes and are not to be construed as limiting the scope of the disclosed embodiments. EXAMPLE A polycarbonate substrate having a diameter of 120 mm and a thickness of 1.1 mm was provided with a groove having a depth of 35 nm. The substrate was coated with a TTP99 silver alloy via sputtering. The silver alloy coating is 120 nm thick. The solution is contained in cyclopentanone with IRGAPHOR® Ultragreen MX as a contrast agent and 1,3-dimethyl-5-[2-(l-fluorenyl-βpyrylene-2-ylidene)-ethylene] - Xiaobiting-2,4,6-triazine was prepared as an absorbent (for 100 ml, contrast mass: ratio of absorbent mass = 1·3··0.16). Then, this solution was spin-coated on the substrate to obtain a dye film having an absorption ratio of 0.4 to λ**. The dye film was dried in a 7 Torr oven for about 20 minutes. Then, a ZnS-SiO 2 barrier layer (10 nm thick) was sprayed onto the dye layer. The last 100 um overlay (available from LINTEC) is laminated to the barrier layer. The disc was tested and recorded using the tester BD-ODU 1000 of Pulstec Industrial Co. Ltd according to the method described in the specification of BDR_Partl_Vl.29, which has a recording/reading light wavelength of 405 nm and a NA (numerical aperture) of 0.85 Optical system of 0.85. Recording and reading were performed at a line speed of 4.92 m/s. The laser power range is recorded from 2 mW to 8 mW and the read laser power is set to 0.35 mW. The following parameters are obtained for this spy (with 35 201017655 nm groove depth): Push-pull before the parameter recording 0.55 Reflectance before recording (%) 18.3 Recording and reading is performed in R8H (%) (reflection after recording) 31.9 I8/I8H Modulation 0.41 - Discs with a 25 nm groove depth and a 46 nm groove depth are also prepared as described above. Figures 4-6 generally show the changes in parameters (push-pull and reflectivity) associated with the design of the disc (especially groove depth, spacing, angle and reflective layer). Thus, the unique combination of groove depth, spacing and angle combined with the absorber-contrast agent achieves the BD disc disclosed herein. More specifically, Figure 4 illustrates the desired push-pull and reflectance range for a BD disc having a groove depth ranging from about 2 〇 nm to about 40 nm. When the groove depth is greater than 40 nm, the unrecorded groove is too large to push and pull. The trend of reflectance shown in Fig. 4 (before and after (R8H) recording) exemplifies that when the groove depth is lower than 20 nm, the reflectance after recording becomes too high. In Fig. 5, the groove depth 1" is representative of a disk having a groove depth of 35 nm, and the groove depth 2" is representative of a disk having a groove depth of 25 nm. As shown, the reflectivity increases with decreasing groove width. Push-pull before writing generally increases with increasing groove width. Figures 4 and 5 together illustrate that the push-pull system is strongly dependent on the groove width and groove depth. Figure 6 illustrates the push-pull as a function of the thickness of the silver alloy layer. The above method was used to prepare these discs, but the thickness of the silver alloy was varied between 3 〇 11111 and 12 〇 nm. As illustrated, the push-pull is reduced as the thickness of the silver alloy increases. Although many of the embodiments have been described in detail, it will be apparent to those skilled in the art that the disclosed embodiments can be modified. Therefore, the foregoing description is considered to be in no way limiting. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view and a block diagram showing an embodiment of an optical disc recording system. Figure 2 is a cross-sectional view showing one embodiment of a recording medium in combination with a partial block diagram of some elements of the system shown in Figure 1; Figure 3 is a perspective view of another embodiment of a recording medium; Figure 4 is a graph showing the relationship between the depth of the groove before and after recording (R8H) and the push-pull (PP) of the medium prepared on the substrate having a groove depth in the range of 20 nm to 50 nm; Figure 5 depicts a plot of the push-pull and reflectivity of a substrate with 2 different groove depths as a function of groove width; and Figure 6 depicts the effect of reflector thickness on the push-pull value of a substrate with uniform grooves. . [Major component symbol description] 100... Recording medium 156... Beam 110... Beam 157... Picker or optical sensor 114... Display monitor 158... Top detector 148...optical component 159... cylindrical lens 150...light source 162"....drive motor 152... incident energy beam 163"....signal 154...reflected beam 164... ...controller 32 201017655 165... ...signal 238··.. dielectric interposer 166...processor 239··.absorber 168". ...analyzer 240.. .... Forming a color or contrast test 170... Reading/writing system agent 220... Substrate 242..... Optically detectable mark 222... ...surface 600··. lens or optical system 230... dye coating G•.....recess 231...reflecting layer D.... groove depth 234.. . . covering or protective layer W··.. .. groove width 236... barrier layer 33

Claims (1)

201017655 VII. Patent application scope: 1. An optical data recording medium comprising: a substrate; at least one groove formed on a surface of the substrate, the at least one groove having a range from about 30 nm to a groove depth of about 40 nm and a groove width ranging from about 140 nm to about 250 nm; a reflector layer formed on the substrate, the reflector layer having a range from about 50 nm to about 120 a thickness of nm; a dye coating formed on the reflector layer, the dye coating comprising: an absorber having a maximum light absorption in a 405 nm band; and a contrast agent Constructed to perform a chemical or physical change upon receiving energy from the absorbent, and to produce an optical contrast at the 405 nm band; and a barrier layer formed on the dye coating, the barrier layer having a range Thickness from about 5 nm to about 50 nm. 2. The optical data recording medium of claim 1, further comprising a dielectric interposer formed between the reflector layer and the dye coating or covering the barrier layer Between the layers, the dielectric interposer has a thickness ranging from about 2 nm to about 10 nm. 3. The optical data recording medium according to any one of claims 1 to 2, wherein the absorbent is selected from the group consisting of solvent yellow 93, curcumin acetate, curcumin benzoate, saffron acid; Porphyrin and its derivatives; azo dye solvent yellow 163; 1,3-dimethyl-5-[2-(l-methyl-pyrrolidine-2-Asian 201017655)-ethylidene]pyrimidine-2 ,4,6-trione; 1,3-dimethyl-5-[2-(3-methyl-oxazolidine-2-ylidene)ethylidene]-pyrimidine-2,4,6-three Ketone; 1-(2-chloro-5-sulfophenyl)-3-.methyl-4-(4-sulfophenyl)azo-2-pyrazol-5-one disodium salt; 7-di Ethyl ethyl coumarin-3-carboxylic acid ethyl ester; 3,3'-diethyl phthalocyanine ethyl sulfate; and 3-allyl-5-(3-ethyl-4-methyl- 2-Thiazolinyl)rhodanine; and wherein the contrast agent is selected from the group consisting of metal complex dyes and phthalocyanines. 4. The optical data recording medium of claim 1, further comprising a cover layer, the cover layer being formed on the barrier layer. 5. The optical data recording medium of any one of claims 1 to 2, wherein the gauge of the medium is in a range from about 0.31 μηη to about 0.33 μπι. 6. The optical data recording medium of any one of claims 1 to 2, wherein the push-pull signal in the 405 nm band is in a range from about 0.4 to about 0.6. 7. The optical data recording medium of any one of claims 1 to 2, wherein the groove depth is in a range from about 33 nm to about 37 nm. 8. A method for producing an optical data recording medium according to claim 1, the method comprising: forming the at least one groove on a surface of the substrate; establishing the reflector layer on a surface of the substrate; Establishing the dye coating on the reflector layer; and establishing the barrier layer on the dye coating. 35 201017655 9. The method of claim 8, further comprising adjusting the depth of the groove to the range of 30 nm to 40 nm and adjusting the thickness of the barrier layer to the range of 5 nm to 50 nm, and The 405 nm band achieves a push-pull signal ranging from about 0.4 to about 0.6. 10. The method of any one of claims 8 or 9, further comprising forming a cover layer on the barrier layer. 11. The method of any one of claims 8 or 9 further comprising a dielectric interposer between the reflector layer and the dye coating or between the barrier layer and a cover layer, wherein The dielectric interposer has a thickness ranging from about 2 nm to about 10 nm. 12. A method for at least one of the following: i) optically recording data or visual images on an optical data recording medium as claimed in any one of claims 1 or 2, or ii) The optical data recording medium of any one of items 1 to 6 reads the optically recorded data or the visual image, the method comprising: transmitting i) the light from the 405 nm band of a light source to capture the energy of the absorbent And transferring the energy to the contrast agent to form an optically readable mark on the optical data recording medium; or ii) light from the 405 nm band of the light source for optical reading of a previously formed optical The mark on the data recording medium. 13. A system for recording or reading at least one of optical data or visual images, comprising: an optical data recording medium as claimed in any one of claims 1 or 2; and 36 201017655 a record At least one of the device or a reading device comprising a light source disposed to illuminate the recording medium with the light of the 405 nm band to i) cause the absorbent to capture energy and transfer the energy To the contrast agent a mark optically readable by the light of the 405 nm band is formed; or ii) a mark previously formed on the dye coat is read. 14. The system of claim 13, wherein the system further comprises: an inductor configured to detect a previous dye prior to the movement of the medium relative to the sensor for optically transmitting data and visual images a mark formed on the coating; a processor operatively coupled to the sensor to cause the processor to receive at least one signal from the sensor that is primarily characterized by the detected mark; an analyzer, An operatively coupled to the processor, the analyzer is configured to receive the at least one signal from the processor, the analyzer is configured to analyze the at least one signal and generate data therefrom; and a computer library The data is constructed to receive and store the data from the analyzer, wherein the system is available via the computer data inventory. 37