Image reading device with protective layers

Details Image reading device with protective layers Image reading device with protective layers

1990-02-05

1991-05-21

Mintel, William

357 32, 357 54, 357 2, H01L 2714

Patent

active

050179888

ABSTRACT:
An image reading device has an entrance window provided in a substrate for receiving the light illuminating an information bearing member bearing information to be read. A photosensor is provided on the substrate for receiving the light that has entered through the entrance window and has been reflected by the information bearing member. Further, a protective layer is formed on the photosensor opposite to the substrate, in order to maintain a constant distance between the information bearing member and the photosensor, and has a multi-layer structure of separate functions, comprising a first layer of a first function at the side of the photosensor, and a second layer of another function different from the first function.

REFERENCES:
patent: 4419533 (1983-12-01), Czubatyj et al.
patent: 4691243 (1987-09-01), Cannella et al.

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