US 20100014408A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2010/0014408 A1 MUSTO et al. (43) Pub. Date: Jan. 21, 2010

(54) TECHNIQUES FOR FORMING BURST Related US. Application Data CUTTING AREA MARK (62) Division of application No. 11/301,312, ?led on Dec. 12, 2005. (75) Inventors: James J. MUSTO, Pittston, PA (60) Provisional application No. 60/687,101, ?led on Jun. (US); James MYRTLE, Lehighton, 3, 2005. PA (US) Publication Classi?cation Correspondence Address: (51) Int. Cl. G11B 7/00 (2006.01) COOPER & DUNHAM, LLP B29D 17/00 (2006.01) 30 Rockefeller Plaza, 20th Floor NEW YORK, NY 10112 (US) (52) US. Cl...... 369/100; 264/133; G9B/7 (57) ABSTRACT (73) Assignee: CINRAM INTERNATIONAL, A BCA mark is applied prior to molding of optical recording INC., Scarborough (CA) media. A stamper including a BCA code is formed. The stamper including the BCA code is used in the molding of optical recording discs. This technique can be used in manu (21) Appl. No.: 12/567,886 facturing of read-only type discs, recordable discs, reWritable discs, hybrid discs, discs readable from both disc sides, discs (22) Filed: Sep. 28, 2009 having multiple information layers, high-density discs, etc.

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TECHNIQUES FOR FORMING BURST medium center hub and ending toWard the medium’s outer CUTTING AREA MARK rim. The light re?ected from a read-only medium’s surface in an player or reader varies according to the pres CROSS-REFERENCE TO RELATED ence or absence of pits along the information track. A photo APPLICATION detector and other electronics inside the optical disc player translate the signal from the transition points betWeen these [0001] This application is a divisional of US. application pits and lands caused by this variation into the 0s and 1s of the Ser. No. 11/301,312, ?led Dec. 12, 2005, the entire contents digital code representing the stored information. of Which are incorporated herein by reference. U.S. applica tion Ser. No. 11/301,312 claims the bene?t of US. Provi [0007] Read-only type optical discs generally are produced sional Application No. 60/687,101, ?led Jun. 3, 2005 and by an injection molding process. Initially, data representing entitled “METHOD AND APPARATUS FOR APPLYING the content to be recorded, encoded as a run length limited BURST CUTTING AREA MARK PRIOR TO REPLICA digital code (commonly knoWn as an EFM signal in CD TION”. manufacturing) Which contains its digital information in the timing betWeen transitions, is used to control a laser beam TECHNICAL FIELD recorder to form pits in a photoresist or a dye-polymer layer on an optical grade glass disc knoWn as a glass master. A [0002] This application relates to optical recording media. metalliZed glass master is used in an electroforming process In particular, the application relates to application of a burst to form (typically, metal) stampers Which are in turn used in cutting area (BCA) mark prior to molding of the optical injection molding of a plural of optical recording discs. recording media. [0008] Inthe molding process, a stamperis used on one side ofan injection molding cavity to emboss an information layer DESCRIPTION OF RELATED ART of pits and lands on a transparent polymer substrate formed by [0003] Use of CDs (compact discs) and (digital ver injection molding. The information bearing surface of the satile discs or digital video discs) as optical storage media substrate is then covered With a re?ective ?lm (of metal or (“optical disc”) for storing and transporting content (such as alloy) or the like. In the case of a CD, a plastic protective audio, video, graphics, computer software, etc.) in an opti coating is applied over the ?lm, and then art (for example, a cally readable manner has beenpopular for a number of years. picture, a design, text, etc.) is typically printed on the upper Several formats of optical discs are currently available, surface of the disc, to form an end product. In the case of including (A) read-only formats such as CD-DA (digital DVDs, tWo half-thickness substrates are typically formed, audio ), CD-ROM (CD-read-only memory), metalliZation is applied to one (for example, DVD-5) or both DVD-ROM, and other formats Wherein content is prere (for example, DVD-10, DVD-9, DVD-18) half-thickness corded on the disc (such as by using an injection molding substrates, and the tWo half-thickness substrates are bonded process), and (B) recordable formats in the form of (i) Write by an adhesive (for example, hotmelt adhesive, ultraviolet once read-many times formats such as CD-R (CD-record light-cured adhesive, etc.).A second information layer can be able), and DVDIR (DVD-recordable), etc., or (ii) reWritable formed for a DVD (for example, DVD-18) by applying a formats such as CD-RW (CD-reWriteable), DVD-RAM photo-polymer coating over a metalliZation layer applied to a (DVD-Random Access Media), DVD-RW or DVD+RW substrate and the second information layer is embossed by a (DVD-reWriteable), PD (Phase change Dual disk) and other stamper into the photo -polymer layer Which is then UV cured, phase change optical discs. Optical disc players for these metalliZed and protective coated. optical discs use a red laser (With a Wavelength range of 635 [0009] Recordable type optical media typically include a nm to 660 nm in the case of DVD and a Wavelength of spiral Wobble groove in the substrate. The groove de?nes approximately 780 nm in the case of CD). recording channels on the disc for recording data, provides [0004] Optical discs using a blue laser (With a Wavelength information for tracking of the disc While Writing or reading range of 400 nm to 420 nm) have also been introduced, such data, and has its Wobble frequency modulated to contain as HD DVD and BD (each of Which includes read-only, addressing and other information for the Write and read pro recordable and reWritable formats). The popularity of optical cesses. The substrate (including information layerbearing the storage media driven by advancements in computer, informa spiral Wobble groove) can be formed by injection molding, tion communication and multimedia technologies has been using a stamper electroformed With a glass master. In addi accompanied also by demands for a higher density and a tion, recordable-type optical media generally include a greater capacity of optical storage media. HD DVD and BD recording layer, and in addition a re?ective layer (of metal or provide high density formats Which attempt to meet such alloy) and a protective layer, and may include other layers. demands. Information is recorded in the recordable-type optical [0005] In addition, optical media having plural information medium by directing a laser light beam modulated by signals layers readable from the same side (for example DVD-9) or to selectively change optical characteristics (re?ectivity or readable from both sides (for example, DVD-10 and DVD extinction coe?icient) of the recording layer. The recording 18), as Well as hybrid optical media Which include a combi layer in Write-once read-many times optical media typically nation of formats, are also available. includes a photosensitive organic dye Which is heated during [0006] In conventional read-only type optical discs (for recording to irreversibly form a pattern of marks or pits into example, CD-ROM, DVD-ROM, etc.), data is generally the recording layer. stored as a series of “pits” embossed in a plane of “lands”. [0010] Each recording side of a reWritable disc also uses Microscopic pits formed in a surface of a plastic medium [for multiple layers beginning With a polycarbonate plastic sub example, polycarbonate or polymethyl methacrylate strate containing a shalloW spiral groove extending from the (PMMA)] are arranged in tracks, conventionally spaced radi inside to the outside diameter of the disc. A DVD-RW disc ally from the center hub in a spiral track originating at the may additionally include pits and lands and a DVD-PAM disc US 2010/0014408 A1 Jan. 21,2010

also inside or alongside the groove itself. The substrates (in For example, the speci?cations for DIVX, DVD and HD cluding information layer bearing the spiral groove, land DVD, respectively, include provisions for a burst cutting area, pre-pits and embossed areas) may be formed by injection intended for copy protection use. In the DIVX format, the molding, using a stamper electroformed With a glass master. burst cutting area is used on each disc for a disc identi?er Next in the multiple layers of a reWritable disc typically Which uniquely identi?es the disc. comes a dielectric layer, folloWed by a phase-change type [0017] The DVD speci?cation Which speci?es the format recording layer having a polycrystalline structure, another of data on DVDs provides for an optional Burst Cutting Area dielectric layer and a re?ective layer (of metal or alloy). Additional layers may also be incorporated above or beloW inside of the lead-in area of a DVD, betWeen an inner circum the dielectric layer, With a protective coating being applied as ference of 22.3 mm+0/—0.4 mm and to an outer circumfer a last layer, and art may be applied to at least one surface. ence of 23.5 mm+/—0.05 mm from the center of the center During recording of the reWritable optical medium, the laser hole of a disk. The Burst Cutting Area is intended to be a selectively heats and alloWs cooling of tiny areas of the location on a DVD onto Which a mark, such as a copy pro recording track to change the phase of each heated area from tection mark or code, or a bar code as a unique serial code for more crystalline into less crystalline (also knoWn as “amor the DVD, can be Written by a poWer laser (Annex K). It has phous”) phase, in order to create marks that can be called been proposed that the serial code can be used for tracking “pits”. During erase, the laser (in a process called “anneal DVDs and thereby also serve an objective of copy prevention. ing”) changes the amorphous areas back into more crystalline The DVD speci?cation does not preclude the possibility of areas. repeating the same mark on multiple discs of the same title. [0011] HD-DVD format discs can be produced using a [0018] A schematic representation of assorted areas of a process similar to the process for forming a DVD disc, except DVD is illustrated exemplarily in FIG. 1A. The disk has a that the minimum pit length is shorter and therefore the laser diameter of 120 millimeters With a center spindle hole of 15 beam recorder used in the mastering process must be adapted millimeters. Adjacent to the spindle hole is a disk clamping to form the shorter pits. area, depicted With dots, having minimum and maximum [0012] BD format discs are typically manufactured by diameters of 22 and 33 millimeters respectively. A guardband injection molding a 1.1 mm substrate With pits and sputtering is providedbetWeen the clamping area and a lead-in data area, a re?ective layer over the pits to form an information layer, depicted With horiZontal lines in FIG. 1A, (multiple dots in and applying a 0.10 mm transparent cover layer over the FIG. 1B) and occupying an area betWeen diameters of 45.2 information layer. and 48 millimeters. The data or “program” area is shoWn With [0013] Various types of hybrid optical media are available. vertical stripes and is located betWeen diameters of 48 and For example, one type of hybrid media has data pit patterns 1 16 millimeters, With a lead-out Width of at least 1 millimeter. prerecorded on a surface of a substrate and has in addition a To facilitate the individualiZation of disks folloWing mass recording layer alloWing a user to record data to the recording production an area is provided Where disk speci?c data, for layer. Further, optical recording media having multiple example serial number or identi?cation data can be added. recording layers are noW also available. In addition, in This optional marking area is knoWn as the burst cutting area another hybrid optical recording disc a read-only area and a or BCA, and is located betWeen diameters of 44.6 to 47 recordable area are present on one side of the hybrid optical millimeters (shoWn in FIG. 1B betWeen radii R1 and R3, disc, With a Wobble groove in the read-only area modulated by respectively). All dimensions stated above are nominal, and depressions in the substrate and extending into the substrate omit alloWable tolerances. Thus BCA data records are Written in the recordable area. Each of the hybrid optical media has Within the lead-in data area of the disk. one or more re?ective ?lms (of metal or alloy) or the like. [0019] Content Protection for Recordable Media (CPRM) [0014] The high capacity of optical recording media, is an option found in some DVD recorders that Write DVD coupled With recent enhancements to personal computers and RW and DVD-RAM discs using the DVD Video Recording the advent of recordable optical media technology, renders format (DVD-VR). Such an option alloWs material speci? optical media popular for illicit use. For example, unautho cally ?agged “copy once” to be Written to a single disc but riZed copying of proprietary and/or copyrighted, recorded prevents that disc from then being further duplicated. This content from optical media to optical media on a large scale restriction is accomplished by binding the content to the (also referred to as “piracy”) is a groWing concern. The piracy particular disc through encryption employing, amongst other typically entails using softWare on a computer system having information, a code (media identi?er) unique to each Writable an optical medium drive to copy content from a recorded disc compliant With the CPRM system. The code is inserted optical medium onto recordable media such as CD-R or CD into the Burst Cutting Area (or NarroW Burst Cutting Area or RW (or DVD-R, DVD-RW or DVD+RW) discs. NBCA in the case of a DVD-RW) of the disc, to keep the disc [0015] Many copy protection techniques and devices have from being further duplicated by a DVD recorder. been proposed to limit copying of content on optical media. [0020] Us. Pat. Nos. 6,608,804, 6,641,886, 6,885,629, Several of the proposed copy protection techniques are dis 6,891 ,788 and 6,894,962 discuss assorted uses of a burst cussed in commonly-oWnedU.S. application Ser. No. 10/903, cutting area and types of information Which can be Written in 099, ?led Jul. 30, 2004 and entitled METHOD AND APPA the burst cutting area. Some conventional techniques for Writ RATUS FOR PROTECTING AGAINST COPYING OF ing and processing of data in a burst cutting area are discussed CONTENT RECORDED ON OPTICAL RECORDING inU.S. Pat. Nos. 6,052,465, 6,081,785, 6,414,920, 6,453,420, MEDIA, the entire contents of Which are incorporated by 6,546,193, 6,708,299, 6,728,181, and in International Publi reference herein. cation No. WO98/ 58368. The entire contents of each of Us. [0016] Some optical recording media have a burst cutting Pat. Nos. 6,052,465, 6,081,785, 6,414,920, 6,453,420, 6,546, area (BCA) Which is speci?ed by the standards or speci?ca 193, 6,608,804, 6,641,886, 6,708,299, 6,728,181, 6,885,629, tions Which govern those types of optical recording media. 6,891,788 and 6,894,962, and International Publication No. US 2010/0014408 A1 Jan. 21,2010

WO98/ 58368 are incorporated herein in order to more fully optical recording media, such as onto a mastering substrate, illustrate the state of the art as of the date of the subject matter father, mother or stamper. The techniques of this disclosure described herein. avoids the use of special-purpose BCA Writer hardWare [0021] Conventionally, marks have been applied to a burst (Which cost approximately $500 k) When serialization is not cutting area after the injection molding stage by cutting a needed. mark With a loW contrast relative to the remainder of the disc, [0031] The terms “BCA mark” and “BCA code” are used onto the re?ective layer of the disc. This approach requires herein interchangeably to denote any mark, code, cut or sur either an o?line process to apply the mark to the burst cutting face re?ectance variation serving for copy protection, disc area or an inline BCA Writer. Marks are typically placed in the identi?cation or other information to be inserted in a burst burst cutting area on DIVX discs, DVD discs and Gamecube cutting area (for example, BCA, NBCA, etc.) of a disc. It is discs using these techniques. However, each process adds knoWn in the art (and it has been proposed) that the burst cost and time to the process and the large expense of BCA cutting area can be used for assorted purposes. The tech marking equipment (approximately $500 k per BCA Writer). niques of this application can be used to apply BCA marks or codes for any of such purposes that does not require serial SUMMARY iZation or varying other information in the BCA mark or code [0022] This disclosure discusses techniques for applying a from disc to disc in a molding run. BCA mark prior to molding of the disc. In instances in Which [0032] An overvieW of optical recording disc creation, serialization of a BCA code is not needed, the same BCA data according to an exemplary embodiment, Will be provided can be placed on each of plural discs in a molding run, by beloW With reference to FIG. 2. applying the BCA mark on a metalliZed mastering substrate [0033] Authoring (step S21) and pre-mastering (step S22) (made of, for example, glass, silicon, etc.), a father, a mother activities are performed in order to preprocess content into a or a stamper. The optical disc formed using the techniques of suitable form for generating an appropriate disc image for this disclosure comprises an information carrying area, a replication of read-only type optical discs. Preparation for burst cutting area, and an embossed BCA mark formed at the applying a BCA mark may include applying the BCA mark to burst cutting area. the disc image in pre-mastering. [0023] The techniques of this application can be used in [0034] It should be understood, hoWever, that the tech manufacturing of read-only type discs, recordable discs, niques of this application are not limited to creation of read reWritable discs, hybrid discs, discs readable from both disc only type optical discs and can be applied to any optical sides, discs having multiple information layers, high-density recording disc Which includes a burst cutting area, by apply discs, etc. ing a BCA mark or code prior to molding of the optical recording media. BRIEF DESCRIPTION OF THE DRAWINGS [0035] Mastering (step S23) is a process, folloWing pre mastering in the disc creation process, for creating a model, [0024] The features of the present application can be more on a mastering substrate, of the ?nal disc Which is used for readily understood from the folloWing detailed description generating a stamper used in a mold for molding the optical With reference to the accompanying draWings Wherein: media. Mastering includes reading a disc image (informa [0025] FIG. 1A shoWs a schematic representation of an tion) from a source media, and then formatting, encoding, and exemplary optical disc, such as a DVD; processing the information into a modulated data signal. The [0026] FIG. 1B shoWs an exploded vieW of a cutout area in modulated data signal is used to control a laser beam recorder FIG. 1A; to form pits and other marks, such as the BCA mark, in a [0027] FIG. 2 shoWs a How chart of a creation process for a photoresist or a dye-polymer layer on an optical grade mas read-only type optical recording disc, according to an exem tering substrate (of, for example, glass, silicon, etc.). As men plary embodiment; and tioned above, the BCA mark may be incorporated in the disc [0028] FIG. 3 shoWs a How chart of a method for applying image and therefore the modulated data signal Would cause a BCA mark prior to molding of optical recording media, the laser beam recorder to form the BCA mark in the master according to an exemplary embodiment of this disclosure. ing substrate. Alternatively, the BCA mark may be formed by the laser beam recorder in an additional pass over the master DETAILED DESCRIPTION ing substrate, such as When the disc image does not include [0029] The folloWing discussion of exemplary embodi the BCA mark, or by another device for forming BCA marks. ments of the techniques of this application is set forth to aid in [0036] In any event, the mastering substrate is covered With an understanding of the subject matter of this disclosure, but a metal layer (for example, silver), and the metalliZed mas is not intended, and should not be construed, to limit in any tering substrate is used in an electroforming process to form Way the scope of this disclosure. Therefore, While speci?c (typically, metal) stampers Which are in turn used in the terminology is employed for the sake of clarity in describing molding of a plural of optical recording discs. some exemplary embodiments, the present disclosure is not [0037] In the electroforming process (step S24), a father is intended to be limited to the speci?c terminology so selected, formed, for example, by placing the metalliZed mastering and it is to be understood that each speci?c element includes substrate into a vessel containing a nickel sulphamate solu all technical equivalents thereof. tion for a predetermined period of time (for example, tWo [0030] The techniques of this disclosure include adding hours) during Which a layer of nickel is groWn onto the data to a burst cutting area (BCA) prior to molding Which can metalliZed surface of the mastering substrate, and at the end be readable by the , such as for authentica of Which a sheet of nickel, constituting the father, is separated tion purposes. This application provides tools (in the form of from the surface of the metalliZed mastering substrate. The methodologies, apparatuses, and systems) for applying a father is a reverse image of the data and can be used to stamp burst cutting area (BCA) mark or code prior to molding of the discs. HoWever, a stamping device Which becomes an integral US 2010/0014408 A1 Jan. 21,2010

part of a mold is subjected to many stresses in the molding The burst cutting area of such a disc is in an annular region of process. Accordingly, the father is typically not used to stamp the disc at an inner radius of 21.0(+0.3/—0)mm and outer discs since if it is damaged the entire process of creating a radius of 22.2(+0/—0.2)mm. father Would have to be repeated. Therefore, the father is [0046] The techniques of this disclosure also may be instead used to form a mother, by applying an electroforming applied to form stampers for use in molding optical discs that process to the father to groW thereon a sheet of nickel consti comply With the requirements of the HD-DVD read-only tuting the mother. The mother is separated from the father and format. The information layer of such discs typically com in turn used in an electroforming process to groW another prises an information track comprising pits having a mini sheet of nickel Which constitutes the stamper. The stamper, mum length of approximately 204 nm and comprises infor like the father, is a reverse image of the data and therefore can mation marks con?gured for reading using a laser With a be used in the injection molding of discs. Several stampers Wavelength in a range of 400 nm to 420 nm and a numerical can be groWn from a mother. aperture of 0.65. The burst cutting area of such a disc is in an [0038] A method for applying a BCA mark prior to mold annular region of the disc at an inner radius of 22.3(+0/—0.4) ing of optical recording media, according to an exemplary mm and an outer radius of 23.15(+0.05/—0.05)mm. embodiment (FIG. 3), includes forming a stamper including a [0047] Similarly, the techniques of this disclosure also may BCA code (step S31), and using the stamper including the be applied to form stampers for use in molding optical discs BCA code in the molding of optical recording discs (step that comply With the requirements of the DVD read-only S33). format. The burst cutting area of such a disc is in an annular [0039] The BCA mark can be applied at the time of mas region of the disc at an inner radius of 22.3(+0/—0.4)mm and tering by creating a solid graphic mark that meets all of the an outer radius of 23.50(+0.05/—0.05)mm. physical speci?cations of BCA marking parameters such as [0048] In each instance, a BCA mark is formed in the depth, Width, length and spacing betWeen marks. The depth, stamper, and each disc molded using the stamper Would also Width, length and spacing may be adapted to accommodate bear the BCA mark. The optical disc formed using the tech contrast and shrinkage. The BCA mark can be mastered onto niques of this disclosure comprises an information carrying a mastering substrate and thereby alloWs all of the molded area, a burst cutting area, and an embossed BCA mark formed discs to contain the same BCA mark. at the burst cutting area. [0040] The laser beam recorder can be controlled appropri [0049] The above speci?c embodiments are illustrative, ately to form such a mark during mastering. As one example, and many variations can be introduced on these embodiments the mark may be formed by applying the laser beam recorder Without departing from the spirit or scope of the disclosure. in a non-continuous spiral mode that is timed With a pulse per For example, elements and/or features of different illustrative revolution signal according to the desired BCA mark. embodiments may be combined With each other and/ or sub stituted for each other Within the scope of this disclosure. [0041] Alternatively, the BCA mark can be applied during the electroforming process to a father, mother or stamper, by 1. A method for applying data to a burst cutting area (BCA) using, for example, a YAG laser, and thereby avoid the need prior to molding of optical recording media, said method for BCA Writer hardWare for applying a BCA mark after the comprising: molding process. forming a stamper including BCA data thereon; and [0042] After stampers are formed, a process (step S25) using the stamper including the BCA data in the molding of generally including the steps of molding, metalliZing, print optical recording discs to form optical recording discs ing and testing is performed. including a BCA mark thereon, Wherein the BCA data is [0043] Methodologies and apparatuses Which can be used applied by a laser to one of a father, a mother and the in a manufacturing process are discussed in US. Pat. Nos. stamper. 4,995,799, 5,766,359, 5,766,495, 5,792,538, 5,863,328, 2. (canceled) 5,900,098, 5,913,653, 5,932,042, 5,932,051, 5,932,058, 3. The method of claim 1, Wherein the BCA data is applied 5,935,673, 5,949,752, 5,958,651, 5,995,481, 5,997,976, to the father, and the father including the BCA data is used in 6,117,284, 6,124,011, 6,160,787, 6,261,403, 6,309,496, a process for forming the stamper. 6,309,727, 6,361,845, 6,440,248, 6,527,538 and 6,814,825, 4. The method of claim 1, Wherein the BCA data is applied the entire contents of each of Which are incorporated by to the mother, and the mother including the BCA data is used reference herein. in a process for forming the stamper. [0044] The techniques of this disclosure can be applied to 5. The method of claim 1, Wherein the stamper is formed any of a broad range of optical discs, such as DVDs, high and then the BCA data is applied to the stamper. density discs (for example, HD DVD and BD), etc., including 6. A method for applying data to a burst cutting area (BCA) any of the formats. prior to molding of optical recording media, said method [0045] For example, the techniques of this disclosure may comprising: be applied to form stampers for use in molding optical discs forming a stamper including BCA data thereon; and that comply With the requirements of the BD read-only for using the stamper including the BCA data in the molding of mat. The stampers are used to form an information layer optical recording discs to form optical recording discs Which includes a series of pits embossed in a plane of land, all including a BCA mark thereon, Wherein of Which being then covered by a re?ective layer. Such an BCA mark information is included along With information information layer typically comprises an information track from source media in a disc image formed in premaster having pits With a minimum length along the track in a range 111%, of 138 nm to 160 nm, and comprises information marks the disc image including the BCA mark information is used con?gured for reading using a laser With a Wavelength in a to control a laser beam recorder to form pits and other range of 400 nm to 420 nm and a numerical aperture of0.85. marks in a mastering substrate in the same pass, and US 2010/0014408 Al Jan. 21,2010

the mastering substrate including the BCA data is used to 11. A hybrid optical disc comprising a BCA mark in a burst form the stamper including the BCA data. cutting area of the disc, Wherein the BCA mark is formed 7. A method for applying data to a burst cutting area (BCA) using the method of claim 1. prior to molding of optical recording media, said method 12. An optical disc readable from both sides and compris comprising: ing a BCA mark in a burst cutting area of the disc, Wherein the forming a stamper including BCA data thereon; and BCA mark is formed using the method of claim 1. using the stamper including the BCA data in the molding of 13-20. (canceled) optical recording discs to form optical recording discs 21. The method of claim 6, further comprising the steps of: including a BCA mark thereon, Wherein a disc image processing the BCA mark information and information including information from source media is used to con from source media into a modulated data signal; trol a laser beam recorder to form pits and other marks in using the modulated data signal to control a laser beam a mastering substrate in a ?rst pass, recorder to form pits in one of a photoresist layer and a the laserbeam recorder is used to apply the BCA data to the dye-polymer layer on a mastering substrate; and mastering substrate in an additional pass after the ?rst forming one of a father and a stamper from the mastering pass, and substrate. the mastering substrate including the BCA data is used to 22. The method of claim 1, further comprising the step of form the stamper including the BCA data. covering an information layer and an embossed BCA mark of 8. A read-only type optical disc comprising a BCA mark in the optical recording discs With a re?ective layer. a burst cutting area of the disc, Wherein the BCA mark is 23. The method of claim 1, Wherein the BCA data applied formed using the method of claim 1. to the stamper has physical parameters that accommodate 9. A recordable optical disc comprising a BCA mark in a contrast and shrinkage in the molded optical recording discs. burst cutting area of the disc, Wherein the BCA mark is 24. The method of claim 1, Wherein the BCA data is formed using the method of claim 1. applied by the laser in a non-continuous spiral mode that is 10. A reWritable optical disc comprising a BCA mark in a timed With a pulse per revolution signal. burst cutting area of the disc, Wherein the BCA mark is formed using the method of claim 1. * * * * *