Photosensitive Darlington device and process of fabricating same

Details Photosensitive Darlington device and process of fabricating same Photosensitive Darlington device and process of fabricating same

1975-07-07

1976-11-30

Wojciechowicz, Edward J.

357 30, 357 36, 357 55, H01L 2714, H01L 2972, H01L 2702, H01L 2906

Patent

active

039953084

ABSTRACT:
Photo-Darlington devices having a response within a narrow range of current output for a certain illumination level are produced by initially providing each device with a light-admitting opening of smaller than requisite size. The device outputs are measured separately, and based on such measurements, the individual openings are enlarged sufficiently so that the output current from each device falls within the requisite range.
For improved performance, each photo-Darlington device has a pair of emitters spaced on opposite sides of the light admitting opening. This provides better efficiency and results in more consistent output despite non-uniform illumination of the device.

REFERENCES:
patent: 3761326 (1973-09-01), Weckler

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