GB1532545A - Production of video disc replicas - Google Patents
Production of video disc replicasInfo
- Publication number
- GB1532545A GB1532545A GB420276A GB420276A GB1532545A GB 1532545 A GB1532545 A GB 1532545A GB 420276 A GB420276 A GB 420276A GB 420276 A GB420276 A GB 420276A GB 1532545 A GB1532545 A GB 1532545A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electro
- forming
- mother
- video disc
- replicas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005323 electroforming Methods 0.000 abstract 5
- 239000011159 matrix material Substances 0.000 abstract 4
- 239000002184 metal Substances 0.000 abstract 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 238000005266 casting Methods 0.000 abstract 1
- 238000000151 deposition Methods 0.000 abstract 1
- 238000004070 electrodeposition Methods 0.000 abstract 1
- 238000004049 embossing Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/0057—Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure ; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/10—Moulds; Masks; Masterforms
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
1532545 Electro-forming video disc replicas MCA DISCO-VISION Inc 3 Feb 1976 [24 Feb 1975] 04202/76 Heading C7B A replica from a three-dimensional matrix (46), Fig. 4 (not shown) in which information is represented as a multiplicity of discrete raised protuberances 47 on, or identations in, the matrix surface e.g. a video disc is produced by electro-depositing metal on to the surface to form a self-supporting first negative replica mother (52) Fig. 6 (not shown) and separating the mother from the matrix surface. A conductive layer e.g. Ag film 48 may be electrolessly deposited on to the matrix surface before electro-deposition first of Cu layer 49 then of Ni layer 50. Further metal may be electro-formed on to the mother surface e.g. first Ni (54) Fig. 7 (not shown), then Cu (56) and finally Ni (58), to form a self-supporting positive replica submaster (60), Fig. 8 (not shown); preferably the mother surface may be passivated prior to electro-forming e.g. by oxidation with oxygen, ozone, nitric acid or KMnO 4 . Further a negative replica may be formed by electro-forming a separable submother using the submaster as an electro-forming mandrel. The submother or submaster may be used as an electro-forming mandrel to form a separable stamper for stamping and/or embossing video disc replicas. Alternatively a die may be electro-formed for casting and/or moulding the replicas. Specifications 1493113 and 1489774 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US55224975A | 1975-02-24 | 1975-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1532545A true GB1532545A (en) | 1978-11-15 |
Family
ID=24204533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB420276A Expired GB1532545A (en) | 1975-02-24 | 1976-02-03 | Production of video disc replicas |
Country Status (6)
| Country | Link |
|---|---|
| JP (2) | JPS51109801A (en) |
| CA (1) | CA1070261A (en) |
| DE (1) | DE2603888B2 (en) |
| FR (1) | FR2301355A1 (en) |
| GB (1) | GB1532545A (en) |
| NL (1) | NL190461C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2721608A1 (en) * | 1977-05-13 | 1978-11-16 | Bosch Gmbh Robert | Stamping die for making video storage patterns on plastic disks - using volatile metal film contg. pattern for electroforming of die |
| JPS5952715B2 (en) * | 1977-09-05 | 1984-12-21 | ソニー株式会社 | Metsuki method |
| NL7908858A (en) * | 1979-12-10 | 1981-07-01 | Philips Nv | METHOD FOR MANUFACTURING DIES FOR PLATE-SHAPED INFORMATION CONTAINERS, AND MATRIES MANUFACTURED BY THAT METHOD |
| JPS573239A (en) * | 1980-06-06 | 1982-01-08 | Hitachi Ltd | Manufacture of information carrier |
| IT1139503B (en) * | 1980-10-27 | 1986-09-24 | Rca Corp | HIGH DENSITY INFORMATION SUPPORT DISCS |
| JPS58158225A (en) * | 1982-03-15 | 1983-09-20 | Toshiba Corp | Manufacture of information recording substrate |
| DE3377173D1 (en) * | 1982-09-29 | 1988-07-28 | Toshiba Kk | Radiation-sensitive carrier body utilized as stamper structure |
| DE3337961A1 (en) * | 1983-10-19 | 1985-05-09 | Fa. Eduard Hueck, 5880 Lüdenscheid | Surface-structured female mould for producing embossed engravings on pressed plastic plates, plastic laminates and the like, and method of producing it |
| JPS60131652A (en) * | 1983-12-20 | 1985-07-13 | Matsushita Electric Ind Co Ltd | Signal recording stamper |
| DE3537483C1 (en) * | 1985-10-22 | 1986-12-04 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | Process for producing a large number of plate-shaped microstructure bodies made of metal |
| DE3737483A1 (en) * | 1987-11-05 | 1989-05-18 | Philips & Du Pont Optical | Method for the reuse of glass substrates for optically readable high-density storage masters |
| ATE549294T1 (en) * | 2005-12-09 | 2012-03-15 | Obducat Ab | DEVICE AND METHOD FOR TRANSFER OF PATTERN WITH INTERMEDIATE STAMP |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3585113A (en) * | 1965-12-23 | 1971-06-15 | Rca Corp | Process for fabricating replicating masters |
| JPS4944124B2 (en) * | 1971-12-02 | 1974-11-26 | ||
| AR200876A1 (en) * | 1972-09-02 | 1974-12-27 | Philips Nv | METHOD OF MANUFACTURING A DISCOIDAL INFORMATION CARRIER AND INFORMATION CARRIER MANUFACTURED BY SUCH METHOD |
| JPS5117451B2 (en) * | 1972-10-17 | 1976-06-02 | ||
| JPS5313580B2 (en) * | 1973-02-08 | 1978-05-11 |
-
1976
- 1976-02-02 DE DE19762603888 patent/DE2603888B2/en active Granted
- 1976-02-03 GB GB420276A patent/GB1532545A/en not_active Expired
- 1976-02-12 NL NL7601470A patent/NL190461C/en not_active IP Right Cessation
- 1976-02-23 JP JP1873676A patent/JPS51109801A/en active Pending
- 1976-02-23 FR FR7604926A patent/FR2301355A1/en active Granted
- 1976-02-23 CA CA246,339A patent/CA1070261A/en not_active Expired
-
1978
- 1978-09-05 JP JP53108179A patent/JPS5916332B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5916332B2 (en) | 1984-04-14 |
| NL190461C (en) | 1994-03-01 |
| DE2603888C3 (en) | 1978-08-10 |
| FR2301355A1 (en) | 1976-09-17 |
| DE2603888B2 (en) | 1977-12-15 |
| CA1070261A (en) | 1980-01-22 |
| FR2301355B1 (en) | 1980-07-04 |
| DE2603888A1 (en) | 1976-09-02 |
| JPS51109801A (en) | 1976-09-29 |
| NL190461B (en) | 1993-10-01 |
| JPS55253A (en) | 1980-01-05 |
| NL7601470A (en) | 1976-08-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PE20 | Patent expired after termination of 20 years |
Effective date: 19960202 |