Optical waveguides – Integrated optical circuit
Patent
1991-06-26
1992-10-13
Lee, John D.
Optical waveguides
Integrated optical circuit
385 49, 385129, 357 19, G02B 612
Patent
active
051557770
ABSTRACT:
Methods, apparatus and manufacturing processes are set forth which reduce the affects of scattered light in electro-optical devices, fiber optic links, etc., through the use of radiation sensitive compounds which, for example, can be easily applied to a semiconductor wafer when fabricating a solid state integrated receiver. According to the invention, a given radiation sensitive compound is transformed into a light blocking material (i.e., a material that will not transmit light) as a result of a lithographic (and in some cases a photolithographic) process. The resultant blocking material may be easily removed from any regions which is designed to receive transmitted light (for example, detector regions); while any other light sensitive regions remain covered (i.e., are protected) by the blocking material at the conclusion of the process.
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Angelopoulos Marie
Cohen Mitchell S.
Pomerene Andrew T. S.
Rogers Dennis L.
Heartney Phan T.
International Business Machines - Corporation
Lee John D.
Morris Daniel P.
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