Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making named article
Patent
1993-12-13
1995-08-08
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making named article
430320, 430330, 430323, 385 43, 385129, 385131, 385130, G02B 612
Patent
active
054397820
ABSTRACT:
Tapered optical waveguides (33') can be easily made by using photolithographic masking and etching to define on a substrate (21) a first polymer structure (22) having a substantially uniform thickness and a tapered width. The first polymer structure is heated sufficiently to form a meniscus along its entire length. The fluidity causes the material to redistribute itself such that, rather than being of uniform thickness, it has a thickness that varies with its width; consequently, the thickness as well as the width of the first polymer structure becomes tapered. The first polymer is cooled and hardened to form a second polymer structure (22') that has a tapered width and a tapered thickness as is desirable for a tapered optical waveguide. The second polymer structure itself can be used as a tapered optical waveguide, or it can be used to control the reactive ion etching of the underlying substrate. In the latter case, the configuration of the tapered second polymer structure is replicated in a glass substrate, for example, which then may be used as a glass tapered optical waveguide (33').
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Haemmerle William H.
MacDonald William M.
Nijander Casimir R.
Shmulovich Joseph
Townsend Wesley P.
Anagebranndt Martin J.
Anderson Roderick B.
AT&T Corp.
Bowers Jr. Charles L.
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