Thermal print head containing super-thin polycrystalline silicon film transistor
CA 1283693 C · Owner: Hayashi, Hisao · Inventors: Yagino, Masanori; Hayashi, Hisao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is herein a thermal print head containing super-thin polycrystalline silicon film transistors, comprising: heating resistors formed in a thin polycrystalline silicon layer formed over a substrate; and a driving circuit comprising super-thin film transistors each having a thin active layer formed in the, polycrystalline silicon layer.
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
- Granted April 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 30, 2008.
- 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.