Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making named article
Patent
1994-02-18
1998-01-20
Chu, John S.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making named article
430320, 385 14, 385130, 437 51, 437 89, 437108, 437112, G03C 500
Patent
active
057099804
ABSTRACT:
A method for producing a cascaded optical space switch and a cascaded optical space switch manufactured with this method are shown being made of many optical branches produced on a single substrate. Here a method is used for growing active, i.e., controllable light amplifying or light absorbing waveguide areas, which can produce locally restrictable different layer thicknesses and/or material compositions of the grown active layers, during the same operation. The number and location of active (1, 3) and passive (2, 4) waveguide areas can be determined by the configuration of areas (M), e.g., masked with SiO.sub.2, prior to the actual growth.
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ALCATEL N.V.
Chu John S.
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