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Expired Canadian patentCanada

Deposition feedstock and dopant materials useful in the fabrication of hydrogenated amorphous silicon alloys for photovoltaic devices and other semiconductor devices

CA 1332343 C · Owner: Solarex Corporation · Inventors: Dickson, Charles Robert

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Abstract From the Canadian patent

Compounds having the formula (MX3)n M'X4n wherein M and M' are different Group 4A atoms selected from the group of silicon, germanium and lead, one of M and M' is silicon X is, hydrogen, halogen or mixtures thereof and n is an integer, between 1 and 4, inclusive are useful as deposition feedstock, materials in the formation of hydrogenated amorphous silicon alloys useful in the fabrication of photovoltaic and other electronically active devices. Dopants having the formula (SiX3)m L X3-m wherein L is a Group 5A atom selected from the group of phosphorus, arsenic, antimony and bismuth X is, hydrogen, halogen or mixtures thereof and m is an integer between 1 and 3, inclusive, are useful in the …

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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 October 11, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 11, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 16, 1987
GrantedOctober 11, 1994
Term endedOctober 11, 2011
Patent numberCA 1332343 C
Classification (IPC)H01L31/18 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedFeb 16, 1987Patent grantedOct 11, 1994Term endedOct 11, 2011

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