TWI257617B - A double sided hybrid optical disk with surface topology - Google Patents

Abstract

An optical disk has a multi-layer tuned optical coating overlying both small bumps to store pre-recorded information and lands onto which information is written to and read. The optical coating includes a phase-change metal/alloy layer formed over the disk substrate and a dielectric layer formed over the phase-change layer. An optical disk according to the invention has specific topological features and sizes.

Description

1257617

V. INSTRUCTION DESCRIPTION (1) The present invention relates to a small-sized optical storage disk for a light storage disk, a light coating. In particular, it relates to a data carrying layer that is usually formed with a multi-layer optical data storage medium. Because it is recorded by the illumination data carrying layer through the substrate, it is located in the classification of the substrate attached media. More illumination light is retrieved on the surface of the data carrying layer. The optical data storage medium or the magnetic disk read optical data storage medium or write-once is embodied. The read-only optical data is stored as a series of physical marks or bumps. It is formed using an injection molding process. A bump cannot be erased or repeatedly written. Diffraction characteristics when compared to the area of the read-only data bearing layer. The difference in the storage characteristics of the read-only optical data is achieved. A type of polycarbonate substrate that is written once to the optical data storage medium. The data is used to modulate the beam to illuminate the organic dyes. The selected regions of the organic dyes that are not affected by the high-density organic dyes are chemically compatible, that is, the regions with lower light reflectivity are stored. The data is recorded as One of the dark regions of the sequence with low reflectivity is formed in the data retrieval, especially before the first different optical resources media, such as the real and the lack of physical records in the disk carrier layer, so this is used first. Through-characteristics, material storage, and physical mark formation, the physical mark or the data in the polycarbonate test is the substrate on which the components usually read the data. And can be recorded as the media of the media, or the block usually has a different physical symbol or number or a block of bumps with different tethers, which are recorded by the density of the organic material system. The layers are recorded across the substrate. When the domain ratio is compared, the change of high-density light is accepted and the "dark" region is generated, and the difference between the & optical rate of the high reflectivity space is achieved.

Page 5 V. Description of invention (2) Search of materials. Chemical changes in organic dyes are not available in the organic dye layer and cannot be written in gold. Therefore, the use of a filial disk can be increased by including a write component on one or both sides of the disk. However, in order to manufacture the Shiweijing or _ people, the pattern is used to separately use the ☆reading part^organic spin dye =:. This increases the shielding of the composite I: and the surface of the cover system. "There are. Covered" coated coating disk t) or formed. In particular, the difficulty of this report does not affect the handling of good; :::= to reach the conclusion. Years and related waste costs, the disc is expected to be based on the traditional CD-ROM "=! Ming-- view, the disc has the information. The light coating includes _ 卩 卩 7 ^ 层 layer mining pre-recorded layer, and Phase change metal/alloy on the disk substrate + dielectric layer on the deformed layer. #Μ according to the invention has specific topography and dimensions. The disk of the month is at least ί: ί Ϊ relative The first and second surfaces. The pattern of the domain, and the _ represents::::: the bump and the metal/alloy layer di surrounding the planar region; the first surface of the substrate is covered. The first and the zinc electric life*, ,, The skin is formed from tin, tantalum and an element selected from the group consisting of indium, yttrium, ytterbium and yttrium. The first metal/alloy layer is formed = chain 1257617 V. Description of invention (3) ' --- - The "Electrical layer is formed to cover the first metal/alloy sound. Although it is not suitable for the electric material, the dielectric layer is formed from the nitrogen layer, and the first metal gold is formed. The layer is placed between the substrate and the first dielectric layer. The two layers are formed to cover the continuity and optical constants of the read-only and writable components. The wavelength of the material is adjusted. The thickness of the layer f. In the embodiment, the ruthenium oxynitride layer has significant advantages, for example; the shovel is achieved by sputtering a ruthenium through a mixture of oxygen and nitrogen. The ruthenium oxynitride layer is changed by oxygen. The ratio of nitrogen to nitrogen is adjusted and controlled by its optical index. Fine tuning of the j-sense can lead to a high degree of spectral modulation to achieve accurate optical enthalpy. The parameters that can be controlled and changed are controlled by the intrinsic indicators controlled by the mixture of oxygen and nitrogen. And thickness control. The optical modulation of the enamel layer produces a moderate surface reflection coefficient for tracking and aggregation while still maintaining sufficient laser absorption for writing capability. It does not require any single continuous layer structure that is shielded on the disk and is applied to the entire surface at the same time. The coating is continuous and does not change depending on the degree of pre-recording or writability of the disk. ^例十'A disc has a spiral pattern of bumps and/or a spiral domain surface, the outer diameter of the disk is not more than 50 mm, and is usually 32 mm or less, and the thickness is usually 〇6 mm. The domain system is formed to make the domain The wall is not perpendicular to the bottom of the disk. In order to maximize the push-pull signal rate, a suitable air-to-air output can be achieved. The angle is between 40 degrees and 50 degrees, and the typical angle is 45 degrees. , the variation is ± 15 degrees. Above this range, the disk is difficult to extract. The module '2' sounds the process output. Below this range, the signal strength is damaged. The height of the domain is 85 nm ± 5 Nano, and the track spacing, that is

6Θ7 Page 7 1257617, invention description (4) ^ The radiation distance between the center lines of the ground plane is 〇74 nm ± 〇 〇 3 nm. The width of the domain width measured at the half width of the most manned on the molded disk is 4 〇〇 nm ± 50 nm or about 55% of the track pitch. The domain system is formed to have a sinusoidal oscillation. In one embodiment, the oscillation frequency and amplitude are ^8·2051 Hz and 55 nm ± 15 nm (or 7.5% of the track pitch ± HFWMs) It is formed in the swing, its high-frequency wobble mark amplitude is about ± 2 5 % of the wobble amplitude, and the high-frequency wobble mark frequency is between 384.6 1 53 and 641.0256 Hz, corresponding to 3 to 5 times the wobble frequency. The bumps formed during the manufacturing process and storing the information to be filled have a width of 225 ± 20 nm or a track pitch of 3〇0/〇±3〇/〇 (the maximum half width measured on the molded disk) In one embodiment, the track pitch between the centerlines of the adjacent bumps is 〇·74 nm ± 〇· 〇 3 nm. When there is a domain surface, the bumps are formed with angled sides The wall has an angle of 45 degrees between 4 degrees and 5 degrees. The height of the bump is μ nanometer ± 5 nanometers, and the length of the bump varies by an integer length of 179 nanometers. The present invention will be more fully understood when referring to the following detailed description and the accompanying drawings. Figure 1 is a top view of the first surface optical disc according to the present invention; ^ - the figure is a side view of the first optical disc along the section line 2 - 2; the second figure shows the field side wall angle to the push-pull signal rate Illustration of the relationship between the system and the system; the fourth figure shows the swing and high frequency swing marks according to the embodiment of the present invention.

Page 8 1257617 Five 'Invention Description (5) part; The figure shows the iland and the relevant gray and push-pull signals. _ ; The sixth picture is the side view of the first picture disc along the section line 6-6; the seventh picture is the upper part of the readable memory part along the first picture CD; The ninth diagram shows the analogy readback signal from the random read only memory and various related parameters according to an embodiment. Do not touch: The same or similar reference numerals are used in the drawings to indicate the same or similar components. Description of the preferred embodiment, an aspect of the invention, optical storage disk is formed from -based /,:: small molded bumps for storing pre-recorded or filled information; writing information and reading information For the deposition of dielectric "2: the slave phase change metal / alloy layer is produced after the lu is deposited on the bumps and the domain surface. This range of fixed wavelengths is ί ί coating' and can be "tuned" To the characteristics and the light index to achieve and the system can be refined by changing the phase change and the thickness of the dielectric layer of the invention == one =::; According to this pre-recorded (or read-only memory) part and = low frequency = different density can be nested and related specific range. (5) and low-frequency swing, and these characteristics. The first figure is a top view of a paste according to the present invention. The magnetic disk 100 has a flaw on the surface of the optical disc 10〇, which includes the pre-recorded or filled information of the main type of the bump 1〇4 type.

6Θ9 Page 9 1257617 V. Description of the invention (6) The plane area 1〇6 between the bumps 1〇4 and the plane area 1〇7 between the convex tracks=1=4, and one It has a second light-writeable portion of 1⁄8 that can be written by the user. ... the domain surface and the bumps are prominent on the side of the armor. The domain area has a wobble and a small fluctuation that allows the optical head to follow the surface of the pendulum for accurate reading. Being filled = memory, 2 has a more detailed discussion below... 2: :& degree or storage capacity. It should be noted that although the first figure shows a specific part corresponding to the convex ghost (only memory part) and the domain surface (writable part), it is:: read, memory part} 02 and writable part !! 8 is placed anywhere and in the disk-filled area. Thus, the optical disc according to the present invention can still have all of the knives on one side, all writable portions on one side, or both. The disk system was stated to be filed on January 16, 2001. Qiu 2 2 Ϊ美^ Patent No. 9/764, 042 titled "The first ΐ ΐ 储存 储存 储存 储存 及 及 及 及The same method, the April 2000 CD ", for the title of Qingyi 9/764, 〇42 is " the smallest production magnet for data storage, Φ please: and the serial number is unknown, Among the double-density disks titled "related traits, all of which are incorporated into the reference. : The in-sequence part 1 〇 2 contains the 螺 3 snail domain 110 that is read to reproduce the stored information. The domain surface is exempt from the gentleman's 丨, ' 番 咨 % 又 又 β β β β β β β β β β β β β β β β β β β β β β β 储存 储存 储存 储存 储存 储存 储存 储存 储存 储存 储存 储存 储存 储存 储存 储存Special

__ This, the required disk is manufactured in the mother of the following description]

Page 10 1257617

The details of the manufacture of the disk are disclosed on January 24, 2002. The application is provided, and the summary of the person's summary is M-1 1 628. The title of the US patent application is unknown. The title is ''Use the female die. Molded discs "t, all of which are incorporated by reference. The female die has recesses and grooves corresponding to the original laser cut. Resin and ruthenium: flow into these depressions and grooves' as formed by injection molding to form the bumps and domains of the disc. When the disk is formed using the parent stamper, it is more difficult for the resin to completely flow into the small recess to flow on the small bump (forming the small recess). Therefore, the small size of the bumps (discussed in detail below) limits the size of the user's disc to about 50 mm or less 'and preferably 32 angstroms to Κ 〇 填 填 填 填 填 , , , , In the meantime, the ability of the tree to fill up the sub-quantity also reduces the very high and short mold resin. The minimum size of the mold is limited to the desired resin from which it is usually to be two kinds of squares; First. This can be attributed to the limitation of the viscous center of the grease due to the small depression towards the disk. The method of molding the bumps makes the resin, the low molecular disk use temperature: injection molding, so any three methods limit the diversity of the mold. This requires the resin to be as low as possible. The outer edge flows, so the optimum degree of the diameter of the disk is the minimum degree of viscosity. The amount of viscosity β will damage the maximum value of the disk t. In addition, the treatment has generally been used to increase the resin during the process of the recess process. The resin is completely filled with air and the heat is completely recessed. Because the injection molding period is filled along the outer edge, the smaller the depression, the easier it is to reach the method. In order to use low-score physical integrity, and the method is to heat the resin to the maximum temperature to obtain the ability to cause scorching, the cooling of the resin must flow outward in time.

1257617 V. Description of invention (8) Distance is reached. The current injection molding process is a diaphragm having an outer diameter of about 50 mm; ^ 疋 maximum distance result is less than one mm of straight: where; and == diameter causes the disc to have practically small storage capacity . Straight: The amount of resin to be injected is minimized ("injection" size is injected into ^ = the amount of resin used) to maximize the injection speed, which also helps to minimize the viscosity coefficient of the fat. This is due to the larger resin: in the case of larger cooling and smaller viscosity coefficient, "generate inflow = J: more difficult time. The less time to inject the resin, the more it stays in: and the process produces The less the cooling, the lesser the thickness of the polycarbonate is found to be between 5 grams and 0.8 grams, which results in a disc thickness of about 6 mm or less and a general thickness of 0.6 mm ± 〇. 3 mm. A smaller amount will result in a disc that is too thin and unstable, while a higher amount will result in an injection size that is difficult to maintain at the desired temperature. A higher amount also produces a thicker disc (unexpected from a product point of view) or requires a disc The outer diameter is increased, which deteriorates the flow problem described above. The second figure is a side view of the optical disc 1 包含 including the writable portion 1 〇 8 along the section line 2 - 2 of the first figure. 108 includes a domain surface 11 〇 and a groove 112 formed on a substrate 2 of a polycarbonate substrate produced by injection molding. The data surface of the substrate 200 includes a domain surface and a groove. a surface optical disc, so the light from the laser 2 5 被 is used to read and write data first hit The data surface of the substrate 200 is struck. The light coating 212 is formed on the substrate 200. The light coating 212 includes a phase change metal/alloy layer and a cover dielectric layer. Note that the light coating 212 is a cover. Read-only memory part 1〇2 and

Page 12 1257617

A solid continuous coating of 4 indentations 108 can be written, such as layer 212 deposited in the same manner and simultaneously on the read only memory portion 1〇2 and the writable portion 1〇8. The thickness of the phase change layer and the dielectric layer can vary depending on the desired wavelength of the read and write laser. The phase change layer and the "electric layer/child product details and the respective materials and characteristics are described in U.S. Patent Application Serial Nos. 9/764, 〇42 and 〇9/854,333. According to the invention, the data is written to the domain surface 丨i 〇 of the first surface optical disc instead of the recess 112. The first surface optical disc is a read or write laser impact and is reflected on the first surface (e.g., light coating 212), rather than a disc that passes through the substrate before impacting the information or data layer. When it is written in the groove, when it is written on the domain surface, the optical phase change will produce an effective shallow groove. This produces a higher contrast between the write and non-write parts. Therefore, the % system receives a higher reflected signal amplitude, thereby improving the performance of the system. Additional details of the grating structure and phase change material utility are disclosed in the US Μ 1 1 628 filed on the 24th of the year. The total number of US patent applications is unknown. The title is "For the mother pressure of the disc molding The use of the model, and, on February 26, 2002, the application of the United States Dijon 12013, unknown 'titled' " double-density CD with relevant characteristics, ", its ^ is incorporated into the reference. It should be noted that although the description relates to the early lean layer on the side of the optical disc, the two data layers on one side are also suitable, as disclosed in co-pending U.S. Patent Application Serial No. 09/764, 042. In a case of 5e, a tin-indium fossil-based alloy is used as a phase change material for oxidized stone as a dielectric layer, and the thickness ranges from 85 nm±, 3j touch nanometer to about 90 nm, and 56 The writable portion 108 of the nano-soil 3% from about 54 to about 58 nm includes a plurality of alternative domains n 〇 a — c and grooves

Page 13 1257617 V. INSTRUCTIONS (10) 112a-b, although their widths can be different, are shown to have the same width. The grooves 112a-b are grooved, have inclined left and right walls 2〇2 and a flat bottom 204, and can be placed in a rotating pattern or another desired pattern. The left and right side walls 202 are typically angled a (alpha) from about 3 degrees to about 50 degrees, with a typical angle of about 45 degrees. This angle is relative to the bottom of the groove 112 where the optical disk is not applied, and is measured along the groove wall between 〇.lTh and 〇.9Th, where Th is the height of the groove. This range should be 45 degrees nominal + 15 degrees. A third graph shows a graphical representation of the relationship between angle a versus push-pull signal rate and process output. A push-pull signal is herein defined as a measurement of an electronic signal that is priced by a separate detector component in an optical head that traces the erroneous signal. When expressed as a percentage, the push-pull signal is the differential strength given to the detector's total strength percentage. For example, in the light diffraction rate, the push-pull ratio is the relative ratio of the diffraction signal as the percentage of the total return intensity. Accurate mathematical derivatives can be found in Bouwhuis et al., 1985 Adam Hi lger, Ding Bristol, Chapter 2, "Disc System Principles,'. As shown in the third figure, there is a substitution relationship between process output and push-pull signal rate. The push-pull signal rate is shown as line 3 〇 〇 and the combined ordinate 3 〇 3 , and the process output is shown as line 302 and the combined ordinate 3〇4. For the present invention, a wall angle a of about 45 degrees provides premixing of process throughput and push-pull signal rates. It should be noted that if the design requires a higher process yield or a higher push-to-signal rate, the degree can be selected due to the relative reduction in performance of other features. % stomach Refer to the second figure again, the height of the side wall 2〇2 when there is no coating (also

1257617 V. INSTRUCTIONS (11) 1 = distance from the top of the domain to the bottom of the groove) ranges from about 8 nanometers to about two meters, with a typical height of 85 nanometers. The actual spacing or distance Tp of the adjacent faces of the domain faces 11〇a&11〇b, where the data is written or recorded, is usually about 米.m±〇·03 nm, and can be between about 〇·7〇约····························································· The width L* of the j-face 110 and the width of the bottom of the groove 112 are generally approximately equal in length to the left and right side walls. For uncoated discs, H is measured at a maximum half width of 400 nm or 50% of the product. However, as will be appreciated, (the width of the domain surface 2 2 〆 the width of the bottom of the groove 112) may vary depending on the application.钬, 仏:: The portion of the writable portion 108 that does not need to be filled during manufacture: the concave material density may be higher than the read-only memory portion 1 0 2 . This double density maximizes process throughput when it is invented to manufacture optical discs. The law of C: including the inclusion: for the continuous servo tracking party, the groove is broken 4 near the physical track sharing. The domain is a continuous oscillating spiral on each of the discs 2 . The oscillating system is described in U.S. Patent No. 4,791,627, which is incorporated herein by reference. The address is inserted into the oscillating domain surface. When the antique 楣猓 揭 ( 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四The mark is used to store the high frequency wobble at the domain of the physical bit = the negative slope of the Uyghur wave type: page 15 61: V. Description of invention (12) There is a finger-active bit The a swing does not exist as a non-active bit. Alternatively, the high-frequency oscillating mark at the coincident oscillating target does not exist. It refers to a punctual positive zero-crossing and the high-frequency oscillating mark at the intersection is in the presence of a zero-positive zero-crossing X-ray &; Set the high-frequency swing to ±1 of the position where the zero-crossing is zero. Within. ; 存 :: :: Sweep mark information, and - the physical sector used to correct the actual physical sector address - the error correction code to implement the misreading of the poor. Approximately equal to the swing amplitude, such as + 2 : the frequency wobble mark has a sinusoidal shape with a peak-to-peak == in the plane of the disc. For example, from

The mid-amplitude is measured as the slope of the trajectory following the internal movement of the SC first disc. In the second example, the two are in the swing cycle. Therefore, the slanting two households r the first sector of each sector including 248 bits can be inserted into the a ten ^ sector, reaching 248 high frequency swing marks eight feet / ρ machine cycle. The wobble frequency in the writable part is ι28·2〇51仟 with a cat speed of 2 g~3速度·corresponding to 384.6 1 _ oz to two = 56 people of the laser circumference 1 are pulse frequency 聿si circumference & Appropriate number, and is also an integer multiple of the run length limited code clock frequency and error check and correction block size. Ye Jizhi's connection can be written and written in the second and the second wide area for the swing and high-frequency swing to meet the following equation. The average value of the peak amplitude of the peak of the κ peak measured by the #迢 ,, is 1257617. (13) 0· 05 <Amppeak_t"eak/ Iland <〇· iq Iland is shown in Figure 5 and is defined as an integrated signal that is derived from the area of the sag disc (integrated into all detector quadrants) . As described above, the peak-to-peak amplitude of the moving and high-frequency wobble marks is within ± 25% of each other. The oscillating CNR is defined as the amplitude of the wobble signal carrier relative to the amplitude of the noise measured on the spectrum analyzer. When measuring the amplitude of the wobble signal (four) wave amplitude, the resolution of the spectrum analyzer is set to 1 Hz, and the center frequency of the spectrum analyzer is set to 1 28. 2051 Hz. The amplitude of the wobble signal carrier is usually larger than μ. The sixth figure is a side view of the disc 1〇〇 along the line 6-6 of the first picture including the read-only memory portion 丨〇2. The information that is filled or pre-recorded is not a series of bumps 104 and a planar area 1〇7 that radiates adjacent bumps 丨〇4. The fifth figure shows three adjacent bumps 104a, 1〇4b and 1〇4c, and three adjacent planar regions l〇7a, l〇7b& 107c. A series of bumps 1 〇 4 and planar regions 107 are typically configured as a spiral pattern on the surface of the disc. The uncoated width of the bumps 1〇4 ranges from 200 to 25 nanometers and is measured at the maximum: a typical width of 225 nm ± 5 nm. In the relative term, the visibility Wb of the bump 1〇4 is usually 3〇%± of the track pitch. In an implementation, the person / appears in the adjacent track, the plane area! The uncoated width % of G7 ranges from 485 to 545 nm, and the typical wide yield measured at the maximum half width is 515 nm. The track pitch Τρβ is the average 夂 distance between the centerlines of adjacent bumps, and in one implementation is 0.74 nm ± 〇 〇 3 nm. Each uncoated, 1〇4 two-degree Η ranged from 8〇 to 9〇N, and the typical height was ^Nemi. The bumps 104 are formed at a corner angle to the planar area of the optical disc. When there is a wall angle of the domain surface, the wall angle measured along the wall of the bumps 1H and 0·9H is between the nominal ± 15 degree offset. Between 40 and 5'0 degrees. After coating (in phase change material and protective coating), the bump width ranges from about 34 3 to 370 nm. Note that the molded optical disc in the read-only memory portion 1 〇 2 is also coated with the photo-coating layer 21 2, which is only used as a reflector and is not written. The seventh picture shows the upper part of the disc 1 〇 沿 along the 1 〇 2 area of the § ** recall. A series of bumps 104a-g and plane regions 1 〇 7a-d are shown, wherein the optical pickup scans or reads the bumps and plane regions in the longitudinal direction. The length of the bumps 04 has various lengths that are coated or uncoated, which are shown in Table 1 below. The planar area 107 is generally the same length as the bumps 104. The mark T represents a minimum timing mark, and the mark length corresponding to the pulse interval ranges from 3T to 14T 〇 mark T is applied after the typical bump length (nano) is molded by the bump length (uncoated) m)___ 3 537 387 4 716 566 5 895 745 6 1074 924 7 1253 1103 8 1432 1282 9 1611 1461 10 1790 1640 11 1969 1819 14 2506 2356

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Table 1. "", each bump and each flat - the above referenced US patent Shenan An M弋 = 0 is not a carry. As described in the use of an address π 4 甲明木 M-1 1 62 8 us, the bumps 104 and the planar regions m can be formed when the optical discs are used. 102 and writable part U8. Contains * two basic areas, the read-only memory part is on the eve of light. The read-only memory portion includes spiral tracks of embossed bumps during fabrication, 35 spaced apart recesses or &blocks; = write portions containing only spiral grooves and domain faces, which are also embossed read memories Some parts do not need to be included - because the #盘#卩1$ hard channel can be used by the optical head to track. In the writable part, the concave 'panel=screw domain system provides tracking information during reading or writing of information. 2::: The digital information in the 'writable part contains other non-f” Crystallization "bits." A day-to-day π system similar to the bundle in the read-only memory portion is formed on the domain surface. The clock-detail feature provides many advantages to the writable part. The data pair 咕 lθ is less than 9%. Use less than 25 on the disc surface. Micro-watts are mixed with the energy level of the carrier pair. The hand is more than 50 decibels. The adjacent track crosstalk level is less than one Torr: ί 3 sets the beam cross-tracking and then tracks the signal to be measured. - In practice, the parent tracking signal of the disc that has not been written and written to the area satisfies the following formula:

0. 0 5 < (I land

-I groove •land < 0 · 2 0

Page 19 1257617 V. Description of the invention (16) 1 2 is the summed signal of the self-domain portion of the 1st, and the integrated signal of the portion of the disc. 0 oq < p * u The push-pull tracking signal on the domain satisfies the following formula: · · Z9 < push~Pull Signal / τ 〇〇 and the disc is not written to the domain 〇.24< : is written The area PPw pair is not written; ak, the rate satisfies the following formula: The ratio of the peak-peak push-pull signal of the domain 1^^!. 65 < PPw / PpU < 〇 90 , split push-pull signal It is defined as the maximum peak-to-peak push-pull signal amplitude measured over the entire writable portion of the surface of the disc, except for the minimum peak-peak push-pull signal amplitude. The split push-pull is usually greater than 〇. 60. Further, according to an embodiment, the defined topology enables the following characteristics to be achieved in the read-only memory or pre-recorded portion of the optical disc. The cross-tracking signal is filtered by a 2-level low-pass filter at a 1 〇仟 〇仟 Hz cutoff frequency for summer measurements of the δ hexadecimal data. The filtered cross-tracking signal satisfies the following formula: 0. 05 < (Ispace ~ Ibump) / Ispace <0.20

Ispace and Ibump are shown in Figure 8, which is defined as the integrated summed signal from the quadrant of the debt detector when it is derived from the surface area of the disc where the bump characteristics and the bump characteristics themselves are spaced apart. The push-pull tracking signal is also filtered by the 2-level low-pass filter with a 〇仟 Hertz cutoff frequency for the measurement of the read-only memory data. The filtered cross-tracking signal satisfies the following formula: 〇. 11 < Push-Pull Signal——peak / Iiand <0 20

Page 20 1257617 V. INSTRUCTIONS (17) '~ The jitter is the standard deviation of the time variation of the binary read signal, which can be a positive or negative signal from the data. The front and rear edge flutter are relative to the phase-locked loop when the clock is measured' and is orthogonal to the channel bit clock period (for the 2 megahertz run length limited code clock). The measured jitter is usually less than g%. The ninth diagram shows an analog readback signal from random read-only memory data in accordance with an embodiment, and is used to further define the disc representation of the disc. The peak of the 3T signal %—the peak amplitude vs. the peak of the 丨4T signal^—the peak amplitude is super, that is, 丨3 / Ιΐ4 > 〇·3〇. The modulation depth is defined as the maximum amplitude of the 14 Τ L IUH divided by the 14 τ signal iu ridge amplitude. The modulation depth satisfies the following formula: 〇· 33 < I14 / I14H < 〇· 48 The read-only memory data envelope modulation is defined as the 14T peak-to-peak signal amplitude π / τ around a track and the entire disc surface. Nw is different, and the variation of the following formula 14T M1N / Il4"AX) is Ιΐ4τ μιν / IUT ΗΑΧ >〇.85 and the surface of the disc is Ι14Τ - / Ι14Τ ΜΑΧ >0 J 2 memory Data crosstalk is obtained by measuring the transcripts of the transcripts. The read-only memory data crosstalk system is defined as the largest envelope of the memory data envelope amplitude except for the minimum peak-peak read-only memory y匕,,,° amplitude. The read-only memory data crosstalk satisfies the following formula: M:atV,1C)Pe MIN / R〇Mdata envelope ΜΑΧ <0. 85 Divided by "τ,乂 is defined as (4) the average value of the signal minus the average of the 3T signal. The amplitude of _ J仏, where the labels Η and L· each represent the maximum and minimum amplitudes. Asymmetry satisfies the following formula:

Page 21 1257617 V. Description of the Invention (18) -0.05 < [(I14H H14L)/2-(I3h + I3L)/2] / I14 < 0.15 The above embodiment of the present invention is only intended to be a case and is not limited . It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the broader aspects of the invention. Accordingly, the appended claims are intended to cover all such modifications and modifications

Page 22 622 1257617 BRIEF DESCRIPTION OF THE DRAWINGS The first figure is an upper view of a first surface optical disc according to the present invention; the second figure is a side view of the first optical disc along the section line 2-2; Graphical representation of the relationship between the field side wall angle versus push-pull signal rate and process output; the fourth figure shows the wobble and high-frequency wobble mark portion in accordance with an embodiment of the present invention; the fifth figure shows the cross-track and push-pull signal The 丨land and I groove; the sixth picture is the side view of the first picture disc along the section line 6 -6; the seventh picture is the upper part of the readable memory part along the first picture disc; I space and I bump are shown for cross-track and push-pull signals; the ninth diagram shows analog readback signals from random read-only memory data and various related parameters in accordance with an embodiment. Element Symbol Description 100 102 104 First Surface Disc Covering Read-Only Memory Part Bumps 104a-104g: Bumps 106, 107: Planar Area 1 0 7a-1 0 7d: Planar Area 1 0 8 : Writable Part 110 : Domain 110a-110c: Alternative domain

Page 23 1257617 Schematic description 112: Grooves 112a-112b Groove 200: Substrate 202: Left and right side walls 2 0 4: Flat bottom 2 1 2: Light coating 250: Laser 400: Swing 402: High frequency Swing mark

Page 24 624

Claims (1)

12576171 public ¥朝 Case number 91109394 11⁄2 month 曰 IQ1) ^ V correction V) three! I I. Patent Application Range l 1 ^ ;: 1 V 1. A compact disc comprising: ^ a substrate having a circular first surface and an outer diameter of the first and second surfaces a spiral pattern of less than 50 mm; one of the first portions of the circular first surface, wherein the information is stored on and read from the bump; the circular first surface a spiral surface region of the second portion, wherein the information is written to and read from the domain surface; and a continuous multilayer coating of the bump and the domain surface on the first surface of the circular surface a layer, wherein the light coating comprises: a metal/alloy layer comprising tin, an element selected from the group consisting of: sin, aluminum, and zinc; and i bismuth oxynitride covering the metal/alloy layer Floor. 2. The optical disc of claim 1, wherein the first and second surfaces have an outer diameter of about 32 mm or less. 3. The thickness of the substrate is about 0.6 mm ± 0. 0 3 mm. 4. The optical disc of claim 1, wherein the width of the bump is between about 200 nm and 250 nm, and the width is measured at a maximum half width. 5. The optical disc of claim 1, wherein the bump width is 30% ± 3% of the pitch of the bump track, and the track pitch is a distance between the center lines of the adjacent bumps in the radial direction. . 6. The average distance between the center lines of the bumps is 0.77 nm ± 0.03 nm. page 1