Thin film vertical resistor devices for a thermal ink jet printhead and methods of manufacture
CA 1285427 C · Owner: Hackleman, David E. · Inventors: Bhaskar, Eldurkar V.; Bearss, James G.; Hackleman, David E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The specification describes thermal ink jet (TIJ) processes and device structures produced thereby wherein either heater resistors or heater resistor-diode combinations are constructed vertically upward from a common supporting substrate. A lower or first metal level conductor pattern provides one part of an X-Y matrix multiplex connection to the resistor/diode components, and a second, upper metal level conductor pattern forms the second part of the X-Y matrix multiplex connection. In this manner, the multiplex drive circuitry for the TIJ printhead resistors/diodes may be fabricated (integrated) directly on the thin film resistor (TFR) printhead substrate. Additionally the, second level …
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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 July 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 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.