Method of producing color filter and resist for light-shielding film used for the method
CA 2042035 A1 · Owner: Kurata, Hideaki · Inventors: Eida, Mitsuru; Kurata, Hideaki; Yokoyama, Seiichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing color filters which enable a transparent electrode for forming a coloring matter film to be used as a transparent electrode for driving liquid crystals and, a resist for a light-shielding film used in this process for forming an insulating black matrix, is disclosed. The above production method comprises forming a black matrix over electrodes other than those corresponding to the individual separated colors and, at the same time insulating layers as, electrode contact window belts by utilizing the black matrix material; forming the electrode contact window belts by forming an electrically conductive layer over the black matrix so that they connect within each …
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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 September 13, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 2012.
- 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
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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.