| 摘要 |
1513165 image pick-up tubes. Photoconductive targets HITACHI LTD and NIPPON HOSO KYOKAI 23 May 1975 [21 June 1974] 22755/75 Headings H1D and H1K A photoconductive image pick-up tube target comprises transparent substrate 2, N-tube transparent conductiva film 3, P-tube photoconductive film 5 containing As, Se and Te, the Te being at a maximum concentration closer to the P-N heterojunction than to the centre of thickness of the P-tube film, and the starting point of the P-type p/c film being 80 to 1500 Š from the heterojunction. Fig. 2A' additionally includes N-type transparent semiconductive film 6. Thickness and details of the materials correspond generally to those of the Specification 1513164. Deposition procedures are detailed in which a first p/c substance consisting of Se containing Te is deposited at continuously varying speed from a time after the commencement of deposition at a substantially constant rate of Se containing As.
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