Method for fabricating integrated optical devices and devices formed thereby
CA 1284902 C · Owner: American Telephone And Telegraph Company · Inventors: Peterson, George E.; Lunt, Sharon R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The disclosed invention involves the finding that the undesirable variation in the quality of integrated optical devices (IODs) produced using current fabrication procedures is due to compositional variations in, and between the boules, used in these procedures. These compositional variations result in refractive index variations which degrade device performance. The disclosed invention also involves two nondestructive, optical techniques for measuring the refractive index uniformities of the boules and substrates used in fabricating IODs.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 18, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 18, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.