| 摘要 |
PURPOSE:To reduce a leak current, by deactivating the surface electrode of the flaw area of a sandwich type optical sensor, wherein an optically active layer is held between two electrodes, by a method for removing said surface electrode or by other methods. CONSTITUTION:An optically active layer 2 composed of an amorphous semiconductor is deposited on a support 1 having electrodes and a surface electrode is further deposited thereon to constitute a light detector. The surface electrode of the flaw part of the optically active layer 2 is deactivated to become a deactivated part 3. The optically active layer 2 of the electrode removed part is removed neither thermally nor mechanically. Since only the electrode of the flaw area of the sandwich type light detector is removed, a leak current is reduced.
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