Radiation imagery chemistry: process – composition – or product th – Post imaging processing – Physical developing
Patent
1982-09-02
1984-09-18
Lee, John D.
Radiation imagery chemistry: process, composition, or product th
Post imaging processing
Physical developing
430321, G02B 5174
Patent
active
044720203
ABSTRACT:
A method for making monolithic optical circuits, with related optical devices as required or desired, on a supporting surface (10) consists of coating the supporting surface with reflecting metal or cladding resin, spreading a layer of liquid radiation sensitive plastic (12) on the surface, exposing the liquid plastic with a mask (14) to cure it in a desired pattern of light conductors (16, 18, 20), washing away the unexposed liquid plastic, and coating the conductors thus formed with reflective metal or cladding resin. The index of refraction for the cladding (22) is selected to be lower than for the conductors so that light in the conductors will be reflected by the interface with the cladding. For multiple level conductors, as where one conductor must cross over another, the process may be repeated to fabricate a "bridge" with columns (24, 26) of conductors to the next level, and conductor (28) between the columns. For more efficient transfer of energy over the bridge, faces at 45.degree. may be formed to reflect light up and across the bridge.
REFERENCES:
patent: 3663194 (1972-05-01), Greenstein et al.
patent: 3716804 (1973-02-01), Groschwitz
patent: 3809732 (1974-05-01), Chandross et al.
patent: 3879606 (1975-04-01), Bean
patent: 4066482 (1978-01-01), Shaw
California Institute of Technology
Lee John D.
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