Ohmic contact to p-type group iii-v semiconductors
CA 1203324 A · Owner: Western Electric Company, Incorporated · Inventors: Cheng, Chu-Liang; Coldren, Larry A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A plurality of pairs of layers comprising gold and zinc are successively evaporated onto a p-type Group III-V semiconductor material such as indium phosphide. A final layer of gold is evaporated onto the pairs of layers prior to heating the multilayer contact. Successive layers of chromium and gold may be evaporated onto the final gold layer prior to the annealing step.
Read the whole patent
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 April 15, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 2003.
- 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.