Claims
- 1. An image-forming member for electrophotography comprising: a substrate for electrophotography and a photoconductive layer comprising amorphous silicon formed on the substrate, wherein the photoconductive layer contains 10 to 40 atomic percent of hydrogen atoms and an impurity for controlling conductivity type which is selected based on positive or negative polarity of an electrostatic image to be formed, and wherein the content of the impurity is varied in the layer thickness direction.
- 2. The member according to claim 1, wherein the impurity comprises an element of Group IIIA or VA of the Periodic Table.
- 3. The member according to claim 2, wherein the element of Group IIIA of the Periodic Table is selected from the group consisting of B, Al, Ga, In and Tl.
- 4. The member according to claim 2, wherein the element of Group VA of the Periodic Table is selected from the group consisting of N, P, As, Sb and Bi.
- 5. The member according to claim 1, wherein the photoconductive layer has a thickness of 5 to 80 .mu.m.
- 6. The member according to claim 1, further comprising a covering layer on the photoconductive layer.
- 7. The member according to claim 1, further comprising a barrier layer between the substrate and the photoconductive layer.
- 8. The member according to claim 7, wherein the barrier layer contains silicon atoms.
- 9. A member according to claim 8, wherein the barrier layer further contains oxygen atoms.
Priority Claims (2)
Number |
Date |
Country |
Kind |
52-154629 |
Dec 1977 |
JPX |
|
53-5958 |
Jan 1978 |
JPX |
|
Parent Case Info
This application is a division of the Rule 1.62 continuation of application Ser. No. 08/440,123, filed May 23, 1995, now U.S. Pat. No. 5,585,149, which in turn is a continuation of application Ser. No. 08/351,561 filed Dec. 7, 1994, now abandoned, which is a continuation of application Ser. No. 07/795,249, filed Nov. 18, 1991, now abandoned; which is a continuation of application Ser. No. 07/782,098, filed Sep. 30, 1985, now abandoned; which is a division of application Ser. No. 695,428, filed Jan. 28, 1985, now U.S. Pat. No. 4,552,824; which is a continuation of application Ser. No. 449,842, filed Dec. 15, 1982, now abandoned; which is a division of application Ser. No. 214,045, filed Dec. 8, 1980, now U.S. Pat. No. 4,451,547; which is a division of application Ser. No. 971,114, filed Dec. 19, 1978, now U.S. Pat. No. 4,265,991.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4853309 |
Hayakawa et al. |
Aug 1989 |
|
4913995 |
Chi et al. |
Apr 1990 |
|
Divisions (4)
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Number |
Date |
Country |
Parent |
448123 |
May 1995 |
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Parent |
695428 |
Jan 1985 |
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Parent |
214045 |
Dec 1980 |
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Parent |
971114 |
Dec 1978 |
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Continuations (4)
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Number |
Date |
Country |
Parent |
351561 |
Dec 1994 |
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Parent |
795249 |
Nov 1991 |
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Parent |
782098 |
Sep 1985 |
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Parent |
449842 |
Dec 1982 |
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