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Expired Canadian patentCanada

Method for optimizing process parameters in photoactive semiconductor manufacturing in situ

CA 1264366 C · Owner: Lilie, Jochen · Inventors: Kunst, Marinus; Werner, Andre; Lilie, Jochen

CIPO record

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Abstract From the Canadian patent

Materials and systems substantially having photoactive properties are produced with a high quality output and without time losses in the fabrication process. To determine the quality of the photoactive material in situ conductivity, is induced in the material by exciting charge carriers through irradiation, and an electromagnetic field influenced thereby is measured, with the result of the measurement being evaluated by a computer with a corresponding control of actuating members such as valves and controllers. Optimum process parameters are thus found and used for the process.

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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 January 9, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 9, 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.
FiledJanuary 25, 1985
GrantedJanuary 9, 1990
Term endedJanuary 9, 2007
Patent numberCA 1264366 C
Classification (IPC)H01L21/66 +1 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedJan 25, 1985Patent grantedJan 9, 1990Term endedJan 9, 2007

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