US4335198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recording
Assignee: Canon Inc
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Filing: 1979-05-14
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Granted: 1982-06-15
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Expires: 1999-05-14
Abstract
Abstract A recording member includes a recording layer capable of recording in response to applied heat. The heat is produced by absorption of high intensity radiation which defines recording information. The recording layer has a radiation absorption layer and an anti-reflection layer capable of preventing the reflection of radiation at the radiation absorption layer.
Inventors
- 👤 Hiroshi Hanada
- 👤 Masanao Kasai
- 👤 Hitoshi Hanadate
- 👤 Yoko Oikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:02
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24306; G11B2007/24308; G11B2007/2431; G11B2007/24312; G11B2007/24314; G11B7/252; G11B7/257; G11B2007/25705; G11B2007/25706; G11B2007/2571; G11B2007/25715; G11B2007/25716; G11B7/253; G11B7/2531; G11B7/2533; G11B7/2535; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/146; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/1266; Y10T428/12674; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/26; Y10T428/261
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
A method of recording information comprising the steps of: forming information bearing high intensity radiation; and applying the high intensity radiation to a nonpoisonous recording member having a recording layer which absorbs the high intensity radiation, said recording layer comprising a radiation absorption layer, and an anti-reflection layer comprising a compound consisting of S and Ge and capable of preventing the reflection of the radiation applied to the radiation absorption layer wherein the radiation absorption layer deforms in response to the heat caused by the absorption of the radiation, and the anti-reflection layer deforms in response to said heat to define the recorded information, wherein said high intensity radiation forms a spot or hole on the recording member no greater than about 1.5 microns in diameter.
Claim 2
Independent Claim
126 words
A method of recording information comprising the steps of: forming information bearing high intensity radiation; and applying the high intensity radiation to a nonpoisonous recording member having a recording layer which absorbs the high intensity radiation, said recording layer comprising a radiation absorption layer, and an anti-reflection layer comprising a compound consisting of S and Ge and capable of preventing the reflection of the radiation applied to the radiation absorption layer wherein the radiation absorption layer deforms in response to the heat caused by the absorption of the radiation, and the anti-reflection layer deforms in response to said heat to define the recorded information, wherein said high intensity radiation forms a spot or hole on the recording member no greater than about 1.5 microns in diameter.
Claim 3
Dependent Claim
26 words
A method of recording according to claim 1, further comprising the step of removing the remaining anti-reflection layer after the application of the high intensity radiation.
Claim 4
Dependent Claim
35 words
A method according to claim 1, wherein the transmissivity of the anti-reflection layer for radiation of the same wavelength as that of the high intensity radiation is higher than that of the radiation absorption layer.
Claim 5
Dependent Claim
18 words
A method according to claim 1, wherein the thickness of the anti-reflection layer is less than one micron.
Claim 6
Dependent Claim
20 words
A method according to claim 1, wherein the thickness of the radiation absorption layer is from 50 to 5000 A.
Claim 7
Dependent Claim
24 words
A method according to claim 1 in which the heat of vaporization of the radiation absorption layer is less than 10 Kcal/cm 3 .
Claim 8
Dependent Claim
36 words
A method according to claim 1, wherein the anti-reflection layer reduces the reflectivity of the radiation absorption layer as to radiation of the same wavelength as that of the high intensity radiation to less than 1/2.
Claim 9
Dependent Claim
14 words
A method according to claim 1, in which the radiation absorption layer is metal.
Claim 10
Dependent Claim
20 words
A method according to claim 1, wherein there are two anti-reflection layers and the radiation absorption layer is between them.
Claim 11
Dependent Claim
14 words
A method according to claim 1, wherein the high intensity radiation is laser light.
References Cited (Backward Citations)
US3314073A
Cited
US3560994A
Cited
US3665483A
Cited
US3720784A
Cited
US3747117A
Cited
US4000492A
Cited
US3889272A
Cited
US4069487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |