US4382103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Master for device replication
Assignee: Xerox Corp
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Filing: 1981-09-08
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Granted: 1983-05-03
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Expires: 2001-09-08
Abstract
Abstract A layer of an ion exchanged glass is utilized as the master for video disc production. Due to the ion exchange, such glass possesses stored energy in the form of compressive stress. When localized portions of the layer of ion exchanged glass are heated sufficiently, those portions of the glass soften and release the compressive stress energy in the form of localized surface bumps. The presence or absence of surface bumps and/or their height can convey the video information in analog or binary form. Once the ion exchanged master is formed, the master is used in a conventional manner to produce mirror image copies on a suitable, conventional substrate, generally a plastic. The copies are generally formed by a pressing or stamping technique, or by an injection molding technique. The relief surface of the copies can be coated with a conventional light reflective layer to aid in optical read-out of the video information stored by the relief surface.
Inventors
- 👤 Paul E. McQuaid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:21
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/2407; G11B7/24085; G11B23/00; G11B23/0057; G11B7/26
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
65 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress, heating localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, and utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface.
Claim 2
Independent Claim
65 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress, heating localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, and utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface.
Claim 3
Independent Claim
68 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress, heating by light energy localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, and utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface.
Claim 4
Independent Claim
68 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress, heating by light energy localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, and utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface.
Claim 5
Independent Claim
78 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress, heating localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface, and coating said mirror image surface copy with a layer of light reflective material.
Claim 6
Independent Claim
78 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress, heating localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface, and coating said mirror image surface copy with a layer of light reflective material.
Claim 7
Independent Claim
84 words
A method of device replication comprising: providng a layer of glass which possesses stored energy in the form of compressive stress, heating by light energy localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, utilizing said bumped surface as a master to form at least one mirror image surface copy of said bumped surface, and coating said mirror image surface copy with a layer of light reflective material.
Claim 8
Independent Claim
84 words
A method of device replication comprising: providng a layer of glass which possesses stored energy in the form of compressive stress, heating by light energy localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, utilizing said bumped surface as a master to form at least one mirror image surface copy of said bumped surface, and coating said mirror image surface copy with a layer of light reflective material.
Claim 9
Independent Claim
143 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress due to an ion exchange, such compressive stress due to an ion exchange being achieved by exposing a glass containing an oxide modifier to metallic ions that have both a greater affinity for occupying lattice sites of the glass than do the ions of the oxide modifier and an atomic radius larger than the atomic radius of the ions of the oxide modifier whereby the metallic ions replace glass lattice sites previously occupied by ions of oxide modifier, heating localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, and utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface.
Claim 10
Independent Claim
143 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress due to an ion exchange, such compressive stress due to an ion exchange being achieved by exposing a glass containing an oxide modifier to metallic ions that have both a greater affinity for occupying lattice sites of the glass than do the ions of the oxide modifier and an atomic radius larger than the atomic radius of the ions of the oxide modifier whereby the metallic ions replace glass lattice sites previously occupied by ions of oxide modifier, heating localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, and utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface.
Claim 11
Independent Claim
147 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress due to an ion exchange, such compressive stress due to an ion exchange being achieved by exposing a glass containing an oxide modifier to metallic ions that have both a greater affinity for occupying lattice sites of the glass than do the ions of the oxide modifier and an atomic radius larger than the atomic radius of the ions of the oxide modifier whereby the metallic ions replace glass lattice sites previously occupied by ions of the oxide modifier, heating by light energy localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, and utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface.
Claim 12
Independent Claim
147 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress due to an ion exchange, such compressive stress due to an ion exchange being achieved by exposing a glass containing an oxide modifier to metallic ions that have both a greater affinity for occupying lattice sites of the glass than do the ions of the oxide modifier and an atomic radius larger than the atomic radius of the ions of the oxide modifier whereby the metallic ions replace glass lattice sites previously occupied by ions of the oxide modifier, heating by light energy localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, and utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface.
Claim 13
Independent Claim
157 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress due to an ion exchange, such compressive stress due to an ion exchange being achieved by exposing a glass containing an oxide modifier to metallic ions that have both a greater affinity for occupying lattice sites of the glass than do the ions of the oxide modifier and an atomic radius larger than the atomic radius of the ions of the oxide modifier whereby the metallic ions replace glass lattice sites previously occupied by ions of the oxide modifier, heating localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface, and coating said mirror image surface copy with a layer of light reflective material.
Claim 14
Independent Claim
157 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress due to an ion exchange, such compressive stress due to an ion exchange being achieved by exposing a glass containing an oxide modifier to metallic ions that have both a greater affinity for occupying lattice sites of the glass than do the ions of the oxide modifier and an atomic radius larger than the atomic radius of the ions of the oxide modifier whereby the metallic ions replace glass lattice sites previously occupied by ions of the oxide modifier, heating localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface, and coating said mirror image surface copy with a layer of light reflective material.
Claim 15
Independent Claim
163 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress due to an ion exchange, such compressive stress due to an ion exchange being achieved by exposing a glass containing an oxide modifier to metallic ions that have both a greater affinity for occupying lattice sites of the glass than do the ions of the oxide modifier and an atomic radius larger than the atomic radius of the ions of the oxide modifier whereby the metallic ions replace glass lattice sites previously occupied by ions of the oxide modifier, heating by light energy localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, utilizing said bumped surface as a master to form at least one mirror image surface coy of said bumped surface, and coating said mirror image surface copy with a layer of light reflective material.
Claim 16
Independent Claim
163 words
A method of device replication comprising: providing a layer of glass which possesses stored energy in the form of compressive stress due to an ion exchange, such compressive stress due to an ion exchange being achieved by exposing a glass containing an oxide modifier to metallic ions that have both a greater affinity for occupying lattice sites of the glass than do the ions of the oxide modifier and an atomic radius larger than the atomic radius of the ions of the oxide modifier whereby the metallic ions replace glass lattice sites previously occupied by ions of the oxide modifier, heating by light energy localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, utilizing said bumped surface as a master to form at least one mirror image surface coy of said bumped surface, and coating said mirror image surface copy with a layer of light reflective material.
Claim 17
Independent Claim
154 words
A method of device replication comprising: providing a layer of borosilicate glass which possesses stored energy in the form of compressive stress due to an ion exchange, such compressive stress due to an ion exchange being achieved by exposing a borosilicate glass containing a sodium oxide modifier to a molten bath of metallic ions that have both a greater affinity for occupying lattice sites of the glass than do the sodium ions of the oxide modifier and an atomic radius larger than the atomic radius of the sodium ions of the oxide modifier whereby the metallic ions replace glass lattice sites previously occupied by sodium ions of the oxide modifier, heating localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, and utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface.
Claim 18
Independent Claim
154 words
A method of device replication comprising: providing a layer of borosilicate glass which possesses stored energy in the form of compressive stress due to an ion exchange, such compressive stress due to an ion exchange being achieved by exposing a borosilicate glass containing a sodium oxide modifier to a molten bath of metallic ions that have both a greater affinity for occupying lattice sites of the glass than do the sodium ions of the oxide modifier and an atomic radius larger than the atomic radius of the sodium ions of the oxide modifier whereby the metallic ions replace glass lattice sites previously occupied by sodium ions of the oxide modifier, heating localized portions of a surface of said layer sufficiently to release the compressive stress energy in the form of surface bumps at said localized portions, and utilizing said bumped surface to form at least one mirror image surface copy of said bumped surface.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |