WO1997036293A1 - Optical card - Google Patents
Optical card Download PDFInfo
- Publication number
- WO1997036293A1 WO1997036293A1 PCT/JP1997/000935 JP9700935W WO9736293A1 WO 1997036293 A1 WO1997036293 A1 WO 1997036293A1 JP 9700935 W JP9700935 W JP 9700935W WO 9736293 A1 WO9736293 A1 WO 9736293A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical
- optical power
- card
- optical card
- viramid
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24073—Tracks
- G11B7/24076—Cross sectional shape in the radial direction of a disc, e.g. asymmetrical cross sectional shape
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0033—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with cards or other card-like flat carriers, e.g. flat sheets of optical film
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/00745—Sectoring or header formats within a track
Definitions
- the present invention relates to an efficient optical power and a technology for performing the same.
- optical card power is known as a memory card in which light, which is a typical word, is built into a plastic card.
- Fig. 1 shows " ⁇ " of WORM (Write Once Reed Many) S card.
- the optical recording unit 2 of this optical card 1 has a track composed of a high-rate part 3 and an ER i-rate part.
- Guide 4 and information Pit 5 is formed as a pre-format
- the S3 ⁇ 4t process is as simple as it ⁇ and the raw material is 1S3 ⁇ 4 for a specific optical recording material.
- the iSS emissivity part is composed of a roughened part with light (See, for example, Japanese Patent Application Laid-Open No. Hei 7-64141)
- This optical card has a rough surface with an iSS i ratio part that is roughened in accordance with the information pattern.
- the original version is duplicated and copied to create a roughened dragon pattern.
- ⁇ P® the S ⁇ is Ru 0
- a positive photoresist is applied to a transparent substrate 11 (an acrylic plate having a thickness of 400 / m) by using a photoresist-type photoresist 0.5;
- the photoresist layer 12 is formed by coating uniformly with a thickness of / m.
- the first exposure is performed as a third step, as shown in FIG. 2C.
- one side of the glass plate 14 is roughened into irregularities with an irregular surface (average roughness 0.3 ⁇ ⁇ , # 300 polished glass) Exposure again (rough surface 1 ⁇ light) using.
- the photoresist layer 12 After exposure, when the photoresist layer 12 is developed as the fourth step, as shown in Fig. 2D, the photoresist exposed to light dissolves, and the unexposed part of the photoresist is removed and the photomask is removed. The pattern of 13 is transferred onto the transparent substrate 11.
- the photoresist layer 12 having a roughened surface is formed as a guide track, for example, with a width of 2.5 m and a pitch of 15 ⁇ mSS.
- the light (shown in Fig. 2D) on which the cage pattern consisting of the iSS i-ratio part whose surface was roughened was formed was used as the rough surface kil plate 15 and this rough surface ⁇ kJl plate From step 15 the mother mask is removed by a molding press. Specifically, as shown in FIG. 3A, a molding agent 22 made of a wire-cured resin or a thermosetting resin ⁇ ⁇ resin was placed on a transparent substrate 21 (acrylic having a thickness of 12 mm). Then, the above-mentioned rough surface kil plate 15 is stacked and pressed, and then peeled off. As shown in FIG. 3B, the pattern is duplicated on the transparent substrate 21 side to form a mother mask 2. Form 3.
- the resin for application 3 3 is placed between the 3 ⁇ 4 side of the transparent protective layer M 32 on which the surface b 3 31 is formed in advance and the pattern surface of the mother mask 23.
- the transparent protective S 32 and the mother mask 23 are awakened and the transparent protective pattern is formed on the transparent side. I do.
- the high reflectivity portion 33a and the high-reflectance portion 33b are formed on the surface of the withdrawal reminder B pursuit 33, and serve as a base material for the optical card. Then, the high reflectance portion 33a and the iS emissivity portion 33b of the 3 ⁇ 4 ⁇ base material composed of the ⁇ resin 33 are covered so that, for example, as shown in FIG. Light of the intermediate oxide of e ⁇ ⁇ Materials 3 4
- a card base material 35 as shown in FIG. 6 is prepared.
- This card base material is formed by applying a printing layer 36 on one surface of a core sheet 35b made of milky vinyl chloride and bonding oversheets 35a and 35c made of transparent vinyl chloride to. .
- the card base material 35 is bonded and laminated on the base material provided with the optical material layer 34 via the bonding layer 37 made of urethane resin as shown in FIG.
- the raw material that has been made ⁇ JLh is punched into a card 3 ⁇ 4 ⁇ , and the light power is applied as shown in Fig.1.
- the present invention has been made in view of the above-described problems, and has as its object to provide a light source including a pre-format portion including an emissivity portion having a high contrast in a high reflectance portion. Aim.
- an optical card according to the present invention is an optical card having a pre-formatted portion composed of a SS emissivity portion of light, wherein the optical efficiency portion is a viramid. It is characterized by being formed by a vertical structure consisting of a convex part of the do ⁇ or a concave part of the inverted viramid. Plus, ⁇ IE ⁇ cards!
- the optical card master of the present invention is an original for duplicating an optical power substrate provided with an optical material layer, and a portion corresponding to a preformed part of the optical power is a viramid or an inverted pyramid. It is characterized by having a shape structure.
- the conventional iSS radiation pattern due to light with the roughened surface A as shown in Fig. 8 it is an inverted pyramid type standing structure B as shown in Fig. 9, and the surface constituting the solid is By forming a pit pattern consisting of a mirror surface with a specific angle and reflecting ⁇ ! ⁇ light in a direction other than the ⁇ ! ⁇ direction, it is possible to obtain excellent contrast in the optical power system.
- FIG. 1 is an external view showing an example of a WORM type optical card.
- FIGS. 2A to 2D are process charts showing a rough surface slab according to the following method.
- FIGS. 3A and 3B are process diagrams for forming a mother mask from a rough plate.
- FIGS. 4A and 4B are diagrams illustrating a process of replicating light on the back surface of a substrate to be a transparent protective S.
- FIG. 3A and 3B are process diagrams for forming a mother mask from a rough plate.
- FIGS. 4A and 4B are diagrams illustrating a process of replicating light on the back surface of a substrate to be a transparent protective S.
- FIG. 5 is a cross-sectional view showing a state in which a luminescent material layer is formed on the base of the S-based material.
- FIG. 6 is a cross-sectional view of the card base material.
- FIG. 7 is a cross-sectional view showing a state in which a card base material is bonded and laminated via an adhesive layer to a base material having a luminescent material layer.
- FIG. 8 is a cross-sectional view showing light in the rough pit.
- FIG. 9 is a cross-sectional view of a fiS radiation pattern formed by an inverted viramid type structure.
- FIGS. 10A to L0G are process drawings showing a method for p ⁇ of the optical master according to the present invention.
- 11A and 11B are diagrams showing specific examples of the viramid shape.
- FIGS. 12A and 12B are diagrams showing specific examples of the inverted pyramid shape.
- FIGS. 13A and 13B are the read signal waveforms of the preformat portion of the optical card according to the invention of the invention and the robust invention, respectively.
- optical card master used as the SS of the optical card of the present invention will be described, including its S3 ⁇ 4g method.
- An optical card original according to the present invention is an original for forming an optical power supply board on which optical material is provided, and a portion corresponding to a preformatted portion of the optical card has an inverted villa. It has a mid-type structure.
- This inverted viramid type structure can be formed by the ⁇ -etching method of a single crystal substrate. That is, when anisotropically etching a single-crystal silicon substrate with an alkali, the etching rate of the (100) plane is fast and the etching rate of the ⁇ 111 ⁇ plane is high by the Mira index of the crystal. Become slow.
- the etchant commonly used for the body is made so that the long side of the pattern to be etched becomes a ⁇ 110> plane.
- an inverted viramid structure consisting of four faces ⁇ 1 1 1 ⁇ is automatically formed.
- the optical card resin master according to the present invention is obtained by subjecting the optical card master to resin using resin. Furthermore, a stamper can be formed by duplicating the obtained resin master using resin. Further, the optical card according to the present invention obtained by using a resin master or stamper for optical power such as ⁇ 1 has a pre-formatted portion composed of an iSS emissivity portion of light. The porosity is constructed of a viramid or inverted viramid structure. In other words, by using the inverted viramid type structure of the single crystal substrate of ⁇ 1 anisotropic etching method for the pre-format part of the optical power source, the defect rate and the surface unevenness are eliminated. The tongue is formed easily and easily.
- the optical pickup has a pyramid structure with ⁇ t on the surface perpendicular to the scan direction. Therefore, abnormal reflection of light at the edge of the preformatted pit in the scanning direction does not occur, so that it is important to reduce or prevent a reading symbol error in the pit edge method.
- this viramid structure is completely geometric, inspection and performance are improved compared to the case of conventional roughened pits consisting of irregular asperities, and therefore the product size can be improved. .
- the above-mentioned viramid (convex) in the present invention includes a square roof as shown in FIG. 11A and a hipped roof B ⁇ as shown in FIG. 11B. Furthermore, the reverse viramite of the present invention! ⁇ (Concave) includes inverted inverted roofs as shown in Fig. 12B in addition to inverted square pyramids as shown in Fig. 12A.
- FIG. 10 is a process chart showing the order of ⁇ Si ⁇ of the optical master according to the present invention.
- a preferred embodiment of the present invention will be described by describing the process chart.
- the resist layer 43 having a thickness of 0.5 mg was formed by applying a treatment. Heating is performed on a hot plate using 150 for about 20 minutes.
- a pattern was drawn on the resist layer 43 using a radiation exposure apparatus or a mask aligner according to a conventional method. This drawing process is performed at an acceleration of SE20 kev and OiiC / cm 2 when using the dew-point device. Thereafter, the image is diced for 1 minute at room temperature with a water-soluble alkali developing solution containing tetramethylammonium hydroxide and rinsed with i ⁇ T SlET. In the case of batch transfer using a mask aligner or the like, exposure is performed at a dose of 50 mJZcm 2 using a metal halide lamp. The subsequent development and rinsing steps are the same.
- step Ri a desired resist pattern was formed as shown in FIG. 10C. Next, a heat treatment was performed at 120 ° C. for 30 minutes in an oven in order to improve the adhesion between the resist layer 43 and the etching layer 42.
- the etching protection SJS 42 exposed from the opening of the patterned resist layer 43 was removed by a dry etching method.
- a dry etching method using the following conditions, namely ⁇ flat [a RIE Doraietsuchin grayed device, 0. lmTo rr, CHFg- 93 sc cm, 0 9 - 7s c cm, was carried out under the condition of 0. 2 / ⁇ ⁇ .
- a descum process of oxygen plasma is performed in accordance with ⁇ .
- the conditions are 0.2 mTorr, —100 sccm, and 0.1 lW / cm 2 for 1 minute using the same etching equipment as described above.
- the patterned resist layer 43 was removed.
- the immersion was performed at 60 ° C for 3 minutes under ultrasonic waves using a stripping solution containing ethanolamine as a ⁇ , followed by rinsing.
- the substrate is cleaned using a normal ⁇ -based cleaning apparatus.
- patterning of single-crystal gay substrate 41 was performed by a wet etching method. Specifically, the reaction was carried out at 70 ° C. for 3 minutes in 101% aqueous potassium hydroxide solution. The etching amount at this time is about 3 m. Rinse the finished etching with, and let l3 ⁇ 4S.
- the crystal orientation of the single-crystal silicon substrate 41 and the dimensions of the pattern to be patterned is important at this time.
- the etching rate of the (100) plane is high and the etching rate of the ⁇ 111 ⁇ plane is low due to the Miller index of the crystal.
- the etching of single crystal The etch rate depends on the nitrogen impurity contained in the crystal, and the etch rate decreases as the orchid «S increases.
- the etched side surfaces are ⁇ 111 ⁇ surfaces, they have an inverted viramid structure, and the etching pattern is used to prevent a flat portion from being formed below the etching head.
- the etching time of about 1.5 times the short dimension of is defined as ⁇ .
- the patterned etching protection film 42 is removed by a dry etching method as necessary.
- the dry etching is performed under the same conditions as the above-described etching of the etching protection 2.
- a plasma Descam treatment is performed at the end according to. The conditions are the same as above.
- the rnr of the optical card master has been finished as powerfully as possible.
- the base angles ⁇ of the isosceles in the master for optical power shown in FIG. 10G thus obtained were 54.7 °, respectively.
- the steps up to light power can be carried out in the same manner as in the prior art.
- the single crystal substrate itself is a relatively expensive material, it is used for the optical power ⁇
- the replica may be duplicated using a conventional resin, and the replica itself may be used as an original master for light power. Further, a replica obtained by using the SK resin from the resin original plate can be used as an optical card stamper.
- the effect is the same whether the structure is concave or convex with respect to the transparent protective S side of the optical power.
- the suitability of the original resin for duplication and printing For the purpose of improving the quality, the replication surface may be treated with various appropriate coating agents.
- the efficiency of the optical card Sii can be improved by forming a multi-faceted stamper in which the above stampers are assembled and arranged.
- a multi-face mother stamper is formed by combining a plurality of mother stampers, and the multi-face mother stamper can be used as a replication source to form a multi-face stamper.
- a preferred specific example of this multi-faceting will be described below.
- a silicon wafer (1) cut into a single surface of a desired optical power is fixed on a substrate so that the crystal orientations are aligned.
- this is converted into 5: using grease or molten glass.
- polishing is performed until the surface of each silicon wafer on the substrate is exposed.
- a sense is formed on this, a contact exposure is performed using a multi-faced photomask, or a pattern is drawn using an electron beam, and a multi-faced ikJS plate is obtained by etching.
- a multi-faceted stamper can be S3i ⁇ by the method based on the hJ® version.
- optical power of the present invention obtained by the ⁇ method and the rough surface of
- Figures 13A (invention) and 13B (conventional product) show a comparison of the reader / writer output signal waveforms of the preformatted part of the optical power obtained using the ⁇ method. This waveform is based on the pit length record.
- the signal amplitude (137 OmV) is large and stable, and no error signal is recognized.
- the maximum amplitude is 117 OmV. Yes, an error signal exceeding the signal threshold is recognized in the portion indicated by the arrow.
- the present invention has been described on the basis of preferred aspects, but the ⁇ SSW method of the original described in the text is for the purpose of illustration, and It is not intended to be limited to cases.
- dry etching conditions are strongly affected by the structure of the etching apparatus and the etching chamber.
- wet etching conditions are not limited to the above-mentioned conditions because they are affected by the amount of the etching solution and the etching solution.
- the original for an optical card according to the present invention has an inverted viramid type structure in which each surface is a mirror surface, although it is constituted by a conventional roughened portion. Therefore, it is possible to obtain an original plate having no defects and no surface unevenness, and thus having a sufficient iSR i ratio.
- the optical power source hatched from this optical card master has a pre-format part consisting of the ifSSi rate part of the contrast that is the high excitation rate part.
- the s3 ⁇ 4ti of this optical card differs from the Siit of the optical power of ⁇ only in the msDl of the so-called rough surface b version, so the duplication technology can be implemented without complicating the process. It is also advantageous in that it can be used as it is.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Credit Cards Or The Like (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19780364T DE19780364C2 (de) | 1996-03-27 | 1997-03-21 | Optische Karte |
CA002221723A CA2221723C (en) | 1996-03-27 | 1997-03-21 | Optical card |
US08/930,058 US5979772A (en) | 1996-03-27 | 1997-03-21 | Optical card |
HK99100361A HK1017758A1 (en) | 1996-03-27 | 1999-01-28 | Optical card |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7257596 | 1996-03-27 | ||
JP8/72575 | 1996-03-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997036293A1 true WO1997036293A1 (en) | 1997-10-02 |
Family
ID=13493328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1997/000935 WO1997036293A1 (en) | 1996-03-27 | 1997-03-21 | Optical card |
Country Status (6)
Country | Link |
---|---|
US (1) | US5979772A (ja) |
CN (1) | CN1111853C (ja) |
CA (1) | CA2221723C (ja) |
DE (1) | DE19780364C2 (ja) |
HK (1) | HK1017758A1 (ja) |
WO (1) | WO1997036293A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010176830A (ja) * | 2009-01-27 | 2010-08-12 | Thomson Licensing | 高データ密度光記録媒体 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW540046B (en) * | 1999-09-01 | 2003-07-01 | Matsushita Electric Ind Co Ltd | Optical disk stamper mastering method and apparatus |
KR100309161B1 (ko) | 1999-10-11 | 2001-11-02 | 윤종용 | 메모리 카드 및 그 제조방법 |
JP4329208B2 (ja) * | 2000-03-02 | 2009-09-09 | ソニー株式会社 | 記録媒体の製造方法、記録媒体製造用原盤の製造方法、記録媒体の製造装置、および記録媒体製造用原盤の製造装置 |
JP4125889B2 (ja) * | 2000-12-04 | 2008-07-30 | 日本板硝子株式会社 | 光学素子、成形型及びそれらの製造方法 |
US20040267847A1 (en) * | 2003-05-13 | 2004-12-30 | Bsi2000, Inc. | Hardware random-number generator |
US20050005108A1 (en) * | 2003-05-13 | 2005-01-06 | Bsi2000, Inc. | Cryptographically secure transactions with optical cards |
US20050247776A1 (en) * | 2004-05-04 | 2005-11-10 | Bsi2000, Inc. | Authenticating optical-card reader |
US20050269410A1 (en) * | 2004-06-04 | 2005-12-08 | Bsi2000, Inc. | Authentication of optical cards |
US20060245081A1 (en) * | 2005-04-19 | 2006-11-02 | Bsi2000, Inc. | Optical drive |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6299930A (ja) * | 1985-10-25 | 1987-05-09 | Hoya Corp | 光情報記録媒体 |
JPS63239630A (ja) * | 1987-03-26 | 1988-10-05 | Dainippon Printing Co Ltd | 光記録媒体およびその製造方法 |
JPH01256038A (ja) * | 1988-04-04 | 1989-10-12 | Kuraray Co Ltd | 光記録メディア |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5182743A (en) * | 1972-08-25 | 1993-01-26 | Thomson-Csf | Optical disk arrangement with diffractive tracks allowing positional control |
DE3724622A1 (de) * | 1986-07-25 | 1988-01-28 | Ricoh Kk | Optisches informationsspeichermedium |
US5344683A (en) * | 1989-10-27 | 1994-09-06 | Ricoh Company, Ltd. | Optical information recording medium with phase grooves in land portions of information recording areas |
-
1997
- 1997-03-21 WO PCT/JP1997/000935 patent/WO1997036293A1/ja active Application Filing
- 1997-03-21 US US08/930,058 patent/US5979772A/en not_active Expired - Fee Related
- 1997-03-21 CA CA002221723A patent/CA2221723C/en not_active Expired - Fee Related
- 1997-03-21 CN CN97190560A patent/CN1111853C/zh not_active Expired - Fee Related
- 1997-03-21 DE DE19780364T patent/DE19780364C2/de not_active Expired - Fee Related
-
1999
- 1999-01-28 HK HK99100361A patent/HK1017758A1/xx not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6299930A (ja) * | 1985-10-25 | 1987-05-09 | Hoya Corp | 光情報記録媒体 |
JPS63239630A (ja) * | 1987-03-26 | 1988-10-05 | Dainippon Printing Co Ltd | 光記録媒体およびその製造方法 |
JPH01256038A (ja) * | 1988-04-04 | 1989-10-12 | Kuraray Co Ltd | 光記録メディア |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010176830A (ja) * | 2009-01-27 | 2010-08-12 | Thomson Licensing | 高データ密度光記録媒体 |
US8693301B2 (en) | 2009-01-27 | 2014-04-08 | Thomson Licensing | High data density optical recording medium |
Also Published As
Publication number | Publication date |
---|---|
CA2221723C (en) | 2000-08-29 |
CN1111853C (zh) | 2003-06-18 |
DE19780364T1 (de) | 1998-06-18 |
CN1194711A (zh) | 1998-09-30 |
US5979772A (en) | 1999-11-09 |
HK1017758A1 (en) | 1999-11-26 |
DE19780364C2 (de) | 2000-01-13 |
CA2221723A1 (en) | 1997-10-02 |
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