US4760008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photosensitive members and methods for manufacturing the same using microwave radiation in magnetic field
Assignee: Semiconductor Energy Laboratory Co Ltd
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Filing: 1987-01-23
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Granted: 1988-07-26
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Expires: 2007-01-23
Abstract
Abstract A photosensitive layer is deposited by chemical vapor deposition which is enhanced both by microwave and magnetic field. The microwave and the magnetic field are cooperating in exciting a process gas. At first, the pressure in a resonating chamber is set at a low pressure in which electron cyclotron resonance. Next the pressure is increased to a level at which the process gas is excited in hybrid resonating action.
Inventors
- 👤 Shunpei Yamazaki
- 👤 Takeshi Fukada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:06
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/44; C23C16/50; C23C16/511; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08214; G03G5/08278; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08755
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
A method for forming a photosensitive layer on a printing drum comprising: disposing said printing drum in a reaction chamber; rotating the printing drum about its axis; exciting a reaction gas in a reaction chamber which communicates with said reaction chamber by a microwave irradiation in a magnetic field; directing the exciting reaction gas from said resonating chamber into said reaction chamber; depositing the product of said reactive gas; and dividing said reaction chamber into two regions with an homogenizer, one region being interposed between said resonating chamber and said reaction chamber and receiving the exciting reactive gas from said resonatiing chamber and expanding it therein, the other region accommodating said drum, receiviing the expanded exciting reactive gas from said one region through said homogenizer and exposing said drum to said exciting reactive gas over the whole length of the drum to be coated.
Claim 2
Independent Claim
144 words
A method for forming a photosensitive layer on a printing drum comprising: disposing said printing drum in a reaction chamber; rotating the printing drum about its axis; exciting a reaction gas in a reaction chamber which communicates with said reaction chamber by a microwave irradiation in a magnetic field; directing the exciting reaction gas from said resonating chamber into said reaction chamber; depositing the product of said reactive gas; and dividing said reaction chamber into two regions with an homogenizer, one region being interposed between said resonating chamber and said reaction chamber and receiving the exciting reactive gas from said resonatiing chamber and expanding it therein, the other region accommodating said drum, receiviing the expanded exciting reactive gas from said one region through said homogenizer and exposing said drum to said exciting reactive gas over the whole length of the drum to be coated.
Claim 3
Dependent Claim
51 words
A method of claim 2 where said homogenizer is an electrode and providing a further electrode on the side of said drum opposite to the side where the homogenizer is disposed to establish an electric field between the homogenizer and the further electrode for aiding the formation of the photosensitive layer.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said non-reactive gas is argon gas.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said reactive is a silane gas.
Claim 6
Dependent Claim
12 words
The method of claim 1 where said homogenizer is a meshed electrode.
Claim 7
Dependent Claim
39 words
The method of claim 1 where the dimension of the opening of said resonating chamber into said reaction chamber in the direction of the axis of the printing drum is substantially less than the length of the printing drum.
References Cited (Backward Citations)
US4532199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |