Title: Optically coupled semiconductive switching devices

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Claims: What is claimed is:

1. An optically coupled semiconductor switching device comprising:

a light-emitting diode having a mesa construction;

a triggerable pnpn semiconductor switching structure; and a preformed intervening light transmitting dielectric material coupled between said switching structure and said light-emitting diode for providing electrical insulation and optical coupling between said diode and said structure, said preformed intervening light transmitting dielectric material comprising a first mass of dielectric material coated on opposite sides with a layer of a second dielectric material, said second material having a lower melting point than said first mass and providing a bond between said first mass and said diode and between said first mass and said pnpn structure.

2. An optically coupled semiconductor switching device according to claim 1 wherein said intervening material is glass.

3. An optically coupled semiconductor switching device according to claim 1 wherein said intervening material is a plastic.

4. An optically coupled semiconductor switching device according to claim 1 wherein the sides of the mesa of said light-emitting diode are coated with an electrically insulating protective coating.

5. An optically coupled semiconductor switching device according to claim 4 wherein said electrically insulating coating is coated with a metallization layer.
Other info:

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