Power module board and power module using the board
CA 2276376 C · Owner: Shimazu, Mitsuru · Inventors: Hirose, Yoshiyuki; Shimazu, Mitsuru; Sasaki, Kazutaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ceramic base plate of aluminum nitride ceramics for example, as a, power module board has a metal layer on a surface of the ceramic base plate at a, fixing portion at which the ceramic base plate is fixed onto a heat radiating plate. Further, a metal film is provided entirely on the rear surface of the ceramic base plate. An IGBT chip or the like is fixed onto the ceramic base plate with a conductive layer, interposed therebetween to form a power module board. Therefore it is , possible to, eliminate cracks which are generated when the ceramic base plate is mechanically, fixed onto the heat radiating plate without the use of solder and heat , radiation from, the ceramic base plate to …
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 June 28, 1999 and granted September 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 2021.
- 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.