High resistance polysilicon load resistor
CA 2034057 A1 · Owner: Tzou, Joseph · Inventors: Chen, Hsiang-Wen; Tsang, Juine-Kai; Lee, Frank Tsu-Wei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Norman Godinho, Frank Tsu-Wei Lee Hsiang-Wen Chen, Richard F. Motta, Juine-Kai Tsang Joseph Tzou, Jai-man Baik, Ting-Pwu Yen ABSTRACT, A load resistor for use in a semiconductor integrated circuit consists of two portions of conductive material typically strips of either a silicide or a composite polycrystalline silicon layer and silicide layer formed thereon, formed on a semiconductor substrate and separated from each other by a selected distance. An electrically conductive dopant diffusion barrier is formed on the first and second portions of conductive material. A polycrystalline silicon material is then placed on the structure such that one portion of the polycrystalline silicon …
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
- Filed January 11, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 2013.
- 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.