Ccd frame transfer device with simplified and improved well and electrode structure
CA 2045363 A1 · Owner: Polaroid Corporation · Inventors: Bencuya, Selim S.; Metz, Werner; Hsieh, Tzu C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: CCD FRAME TRANSFER DEVICE WITH SIMPLIFIED AND IMPROVED WELL AND ELECTRODE STRUCTURES ABSTRACT OF THE INVENTION:, A charge coupled imaging device comprises a substrate of first conductivity type and an overlying well layer of a second opposite conductivity type first formed as an unpatterned layer. A charge transfer channel layer of the first conductivity type is also first formed as an unpatterned layer and longitudinal spaced apart channel stop regions of the second conductivity type are patterned to overlie the well layer and are in contact therewith. The substrate the, channel stops, and the well are preferably biased with respect to each other so as to effect complete charge …
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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
- Filed June 25, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 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.