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Browse Prior Art Database

Matching of Electro Optical Devices

IP.com Disclosure Number: IPCOM000090434D
Original Publication Date: 1969-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Burns, RP: AUTHOR

Abstract

This process is for manufacturing electro-optical semiconductors and passive optical devices in which it is desirable to coat the surface of the optical portion of the device with a film of glass. The sensitivity of electro-optical semiconductors and passive optical devices, to a large degree, is dependent upon the thickness of the glass deposited on the device and. Thus, it is desirable to control and monitor the thickness and match the device in this manner to its final or end use. The process utilizes light source 10 which is substantially equal in intensity to the light source which is used in the application to which the device is put.

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Matching of Electro Optical Devices

This process is for manufacturing electro-optical semiconductors and passive optical devices in which it is desirable to coat the surface of the optical portion of the device with a film of glass. The sensitivity of electro-optical semiconductors and passive optical devices, to a large degree, is dependent upon the thickness of the glass deposited on the device and. Thus, it is desirable to control and monitor the thickness and match the device in this manner to its final or end use. The process utilizes light source 10 which is substantially equal in intensity to the light source which is used in the application to which the device is put. As shown, light source 10 is positioned in such a manner as to reflect light off a device 11 as it is being glassed, the light being reflected onto a detector 12 which is another electro-optical semiconductor or passive optical device which is identical to the device being processed. A material source, such as an evaporator or sputtering unit 13, is provided for continual deposition upon device 11 as the light from the light source 10 is impinging upon such device. When the reflected light is at a minimum, as seen by detector 12, the glassing process can be stopped as the processed device 11 is then receiving the greatest quantity of light and matches detector 12.

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