Patent US4678736A successfully refreshed from Google Patents.
US4678736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical recording media on which information is stored and method of making same
Assignee: Mitsubishi Chemical Corp
•
Filing: 1986-03-03
•
Granted: 1987-07-07
•
Expires: 2006-03-03
Abstract
Abstract Optical recording media for storing information on which bits are formed by applying radiant energy to a polydiacetylene thin film supported by a substrate, so that the main chain structure of the polydiacetylene is transformed into another form or forms. The optical recording media has the advantages of allowing high-speed recording both with small amounts of energy for recording and with high recording density.
Inventors
- 👤 Eiichi Hanamura
- 👤 Yoshinori Tokura
- 👤 Akio Takada
- 👤 Akiro Itsubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:46
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/245; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
65 words
A method of making an optical recorded media for storing information optically comprising; forming a polydiacetylene thin film on a substrate; irradiating said polydiacetylene thin film with beams of radiant energy having minute diameters, said beams of radiant energy being modulated to represent information being recorded; whereby the structure of said polydiacetylene thin film is transformed to represent bits in which the information is recorded.
Claim 2
Independent Claim
65 words
A method of making an optical recorded media for storing information optically comprising; forming a polydiacetylene thin film on a substrate; irradiating said polydiacetylene thin film with beams of radiant energy having minute diameters, said beams of radiant energy being modulated to represent information being recorded; whereby the structure of said polydiacetylene thin film is transformed to represent bits in which the information is recorded.
Claim 3
Dependent Claim
22 words
The method according to claim 1 wherein said polydiacetylene thin film is formed by vacuum deposition of a polymer of diacetylene monomer.
Claim 4
Dependent Claim
25 words
The method according to claim 1 in which said polydiacetylene thin film is formed of a polymer of diacetylene monomer LB film by Langmuir-Blodgett's technique.
Claim 5
Dependent Claim
76 words
The method according to claim 1 in which controlling said beams of radiant energy comprises; controlling the amount of radiant energy to produce different values; said different values being equal to or greater than two; applying said controlled beams of radiant energy to said polydiacetylene thin film to produce transformations equal to the number of different values of said radiating beam; whereby information bits are formed by the number of different values of the radiating beam.
Claim 6
Dependent Claim
26 words
The method according to claim 4 wherein the beams of radiant energy have a wavelength greater than approximately 200 nanometers and less than approximately 400 nanometers.
Claim 7
Dependent Claim
26 words
The method according to claim 4 wherein the beams of radiant energy have a wavelength greater than approximately 400 nanometers and less than approximately 720 nanometers.
Claim 8
Dependent Claim
23 words
The method according to claim 4 wherein the beams of radiant energy have a wavelength between approximately 720 nanometers and approximately 12 micrometers.
Claim 9
Dependent Claim
19 words
The method according to claim 1 wherein said beam of radiant energy is a pulsed beam of radiant energy.
Claim 10
Dependent Claim
52 words
Optical recording media homing information optically stored comprising; a substrate; a thin film comprised of polydiacetylene film supported by said substrate; information bits formed on said polydiacetylene thin film by application of modulated radiant energy of minute diameter to optically store information; said polydiacetylene thin film being transformed by said radiant energy.
Claim 11
Dependent Claim
52 words
Optical recording media homing information optically stored comprising; a substrate; a thin film comprised of polydiacetylene film supported by said substrate; information bits formed on said polydiacetylene thin film by application of modulated radiant energy of minute diameter to optically store information; said polydiacetylene thin film being transformed by said radiant energy.
Claim 12
Dependent Claim
63 words
Optical recording media according to claim 9 wherein said polydiacetylene thin film comprises; a polymer of a diacetylene monomer; said polymer of diacetylene monomer having a side chain selected from the group consisting of; carboxylic acid, sulfonic acid, and their esters, amides and salts, alcohols and their carboxylic esters; sulfonic ester, sulfinic ester, isocyanic ester, and carbamic ester; hydrocarbon, phenyl, and heterocyclic compound.
Claim 13
Dependent Claim
31 words
Optical recording media according to claim 9 wherein said polydiacetylene thin film is comprised of; a thin film of a polymer of diacetylene monomer formed on said substrate by vacuum deposition.
Claim 14
Dependent Claim
29 words
Optical recording media according to claim 9 wherein said polydiacetylene thin film is comprised of; a polymer of diacetylene monomer LB film on said substrate formed by Langmuir-Blodgett's technique.
Claim 15
Dependent Claim
29 words
Optical recording media according to claim 9 wherein said polydiacetylene thin film is comprised of a polymer of diacetylene monomer film formed on said substrate by a coating method.
Claim 16
Dependent Claim
22 words
Optical recording media according to claim 9 wherein the thickness of said polydiacetylene thin film is approximately 100 angstroms to 10 nanometers.
Claim 17
Dependent Claim
78 words
Optical recording media according to claim 9 wherein said information bits comprise; n kinds of bits where n is equal to or greater than three; said information bits being formed by application of n types of radiant energy having irradiation energy different from one another to said polydiacetylene thin film; said polydiacetylene thin film being transformed into a main chain structure having n kinds of states whereby information is recorded and stored by said n kinds of bits.
Claim 18
Dependent Claim
62 words
Optical recording media according to claim 9 wherein said information bits comprise; two kinds of bits formed by application of two types of radiant energy having different irradiation energy from one another to said polydiacetylene thin film, said polydiacetylene thin film being transformed into a main chain structure having two states whereby information is recorded on and stored in a binary form.
References Cited (Backward Citations)
US4208501A
Cited
US4515429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-06 | 1991-01-05 | 1991-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-06 | 1995-01-05 | 1995-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-06 | 1999-01-05 | 1999-07-07 | $7700.00 | Window Closed / Lapsed |