Method of producing optical waveguides by an ion exchange technique on a glass substrate
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United States of America Patent
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Nov 3, 1992
Grant Date -
N/A
app pub date -
Jun 10, 1991
filing date -
Jul 10, 1990
priority date (Note) -
Expired
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Abstract
The invention relates to a method of producing waveguides by an ion exchange technique on a glass substrate. In order to be able to alleviate the tolerances allowed for the ion exchange technique, the waveguides are formed in the invention by diffusing ions which increase the refractive index away from a waveguide formed previously on the glass substrate and being wider than the optical waveguides to be produced, by using the ion exchange technique and a positive-type ion exchange mask.
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