Semiconductor laser
CA 1063215 A · Owner: Hitachi, Ltd. · Inventors: Chinone, Naoki; Takeda, Yutaka; Nakashima, Hisao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a mesa-stripe geometry semiconductor laser. The laser is comprised of an electrode which is provided on one principal surface of a semiconductor wafer, a P-N junction provided on the other and opposite principal surface of the wafer an active region which, adjoins the P-N junction and a mesa shaped current-conducting, semiconductor region which is formed on a principal surface of the active region in a small sectional area and which contains the active region therein. The laser also is comprised of a mount supporting a second semiconductor region which is formed into a mesa shape by an etching groove formed on at least one side of said current-conducting …
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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 September 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 25, 1996.
- 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.