Title: Optically coupled semiconductive switching devices

Abstract: This relates to an optically isolated switching device made by coupling the output of a light emitting diode into a thyristor. Sensitivity is determined by optical flux density rather than total flux. Improved sensitivity is obtained with a mesa construction of a diode mounted on and bonded to a thyristor at a window in its cathode via a glass preform having a high refractive index.

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Inventors: Jackson, Thomas M. (Bishops Stortford, EN)
Brisbane, Alan D. (Epping, EN)
Peters, Jack R. (Harlow, EN)
Heinecke, Rudolf A. H. (Harlow, EN)
Moule, David J. (Saffron Walden, EN)

Application Number: 466571
Filing Date: 1974-05-03
Publication_date: 1976-02-10
Assignee: International Standard Electric Corporation (New York, NY)
Primary Class(es): 257/82 257/117, 257/465, 257/E31.108
Other Classes:
US Patent Ref:

3354316	Nov, 1967	Deverall	357/19.
3370174	Feb, 1968	Toussaint	357/19.
3462605	Aug, 1969	Engeller	357/19.
3636358	Jan, 1972	Groschwitz	357/19.

Other Refs:
Primary Examiner: Miller, Jr., Stanley D.
Assistant Examiner: Wojciechowicz, E.
Attorney: O'Halloran; John T., Lombardi, Jr.; Menotti J., Ingrassia; Vincent