Method of adjusting bridge circuit of semiconductor
CA 1307939 C · Owner: Sumitomo Electric Industries, Ltd. · Inventors: Nishiguchi, Masanori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of adjusting a bridge circuit of a semiconductor pressure sensor comprises the steps of providing conductive lines connected to at least one of diffused resistors at predetermined intervals during the wiring process, said diffused resistors being provided to connect strain gauge resistors constituting said bridge circuit; providing means for adjusting the resistance value of at least said one of said diffused resistors; making vacuum suction to the back surface of a diaphragm of said semiconductor pressure sensor in the testing process to make a state wherein pressure is virtually applied to said diaphragm from the surface side thereof; measuring the pressure sensitivity of said …
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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 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 2009.
- 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.