Patent Yard Sign in
Expired Canadian patentCanada

Fabrication of semiconductor devices utilizing patterned metal layers

CA 1270070 C · Owner: Higashi, Gregg Sumio · Inventors: Higashi, Gregg Sumio

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

This invention relates to a method of fabricating semiconductor devices, which includes growing patterned metal layers. Patterned metal growth is obtained on a substrate by illuminating the substrate in the presence of a metal containing molecule adsorbed on the substrate. After initial illumination the, photoreacted molecules catalyze further metal growth without further illumination.

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 June 5, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 16, 1987
GrantedJune 5, 1990
Term endedJune 5, 2007
Patent numberCA 1270070 C
Classification (IPC)B05D3/06 +2 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedApril 16, 1987Patent grantedJune 5, 1990Term endedJune 5, 2007

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.