US4488083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television camera tube using light-sensitive layer composed of amorphous silicon
Assignee: Fujifilm Holdings Corp
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Filing: 1981-04-30
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Granted: 1984-12-11
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Expires: 2001-04-30
Abstract
Abstract A television camera tube using a target comprising an electrically-conductive support, a blocking layer composed of a n-type amorphous silicon semiconductor, provided on the electrically-conductive support, and a light-sensitive layer composed of amorphous silicon provided on the blocking layer.
Inventors
- 👤 Eiichi Inoue
- 👤 Isamu Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:46
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/45; H01J29/451; H01J29/456
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
62 words
A television camera tube using a target which comprises an electrically-conductive support, a blocking layer composed of an n-type amorphous silicon semiconductor consisting essentially of silicon and hydrogen, provided on the electrically-conductive layer, and a light-sensitive layer composed of an i-type amorphous silicon semiconductor having a conductivity of not more than 10 -8 (Ω cm) -1 , provided on the blocking layer.
Claim 2
Dependent Claim
62 words
A television camera tube using a target which comprises an electrically-conductive support, a blocking layer composed of an n-type amorphous silicon semiconductor consisting essentially of silicon and hydrogen, provided on the electrically-conductive layer, and a light-sensitive layer composed of an i-type amorphous silicon semiconductor having a conductivity of not more than 10 -8 (Ω cm) -1 , provided on the blocking layer.
Claim 3
Dependent Claim
27 words
The television camera tube as in claim 1, wherein a cover layer having an electron retention action is provided on the light-sensitive layer composed of amorphous silicon.
Claim 4
Dependent Claim
27 words
The television camera tube as in claim 1 or 2, wherein the conductivity of the blocking layer is more than about 10 -8 (Ω cm) -1 .
Claim 5
Dependent Claim
24 words
The television camera tube as in claim 1 or 2, wherein the thickness of the blocking layer is not less than about 50 Å.
Claim 6
Dependent Claim
23 words
The television camera tube as in claim 1 or 2, wherein the thickness of the blocking layer is about 50 Å to 1μ.
Claim 7
Dependent Claim
29 words
The television camera tube as in claim 1 or 2, wherein the blocking layer is composed of amorphous silicon containing therein about 0.1 to 40 atomic % of hydrogen.
Claim 8
Dependent Claim
43 words
The television camera tube as in claim 1 or 2, wherein the blocking layer is composed of amorphous silicon containing therein about 0.1 to 5 atomic % of hydrogen, and further containing about 0.01 to 20 atomic % of F, Cl, or I.
Claim 9
Dependent Claim
26 words
The television camera tube as in claim 6, wherein the blocking layer further contains therein P, As, Sb, Bi or N atom as an impurity atom.
Claim 10
Dependent Claim
26 words
The television camera tube as in claim 7, wherein the blocking layer further contains therein P, As, Sb, Bi or N atom as an impurity atom.
Claim 11
Dependent Claim
22 words
The television camera tube as in claim 1 or 2, wherein the thickness of the light-sensitive layer is about 0.5 to 10μ.
Claim 12
Dependent Claim
34 words
The television camera tube as in claim 1, wherein the light-sensitive layer is composed of amorphous silicon containing therein P, As, Sb, Bi, N, B, Al, Ga, In or Tl as an impurity atom.
Claim 13
Dependent Claim
31 words
The television camera tube as in claim 2, wherein the cover layer is composed of a substance having an electron mobility of not more than about 10 -4 cm 2 /volt.sec.
Claim 14
Dependent Claim
29 words
The television camera tube as in claim 2, wherein the cover layer is composed of a substance having a specific resistance of not less than 10 12 Ω cm.
Claim 15
Dependent Claim
48 words
The television camera tube as in claim 2, wherein the cover layer is composed of amorphous Se, amorphous cholgenide, SiO 2 , SiO, Al 2 O 3 , ZrO 2 , TiO 2 , MgF 2 , ZnS, or a Si-C, Si-C-F, Si-N, or Si-N-O based amorhous substance.
Claim 16
Dependent Claim
20 words
The television camera tube as in claim 2, wherein the thickness of the cover layer is about 0.005 to 50μ.
Claim 17
Dependent Claim
32 words
The telelevision camera tube as in claim 1 or 2 wherein the conductivity of the light sensitive layer composed of amorphous silicon is less than about 10 -8 (Ω cm -1 ).
Claim 18
Dependent Claim
30 words
The television camera tube as in claim 1 wherein the blocking layer further contains an impurity atom selected from the group consisting of P, As, Sb, Bi and N atoms.
References Cited (Backward Citations)
US4255686A
Cited
US4329699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |