Fishing – trapping – and vermin destroying
Patent
1989-10-14
1992-03-17
Chaudhuri, Olik
Fishing, trapping, and vermin destroying
148DIG40, 148DIG122, 437959, 437967, 437971, H01L 21469
Patent
active
050968564
ABSTRACT:
The disclosure relates to a method of forming in situ phosphorous doped polysilicon wherein a surface upon which phosphorous doped polysilicon is to be deposited is placed in a vacuum furnace and, after low pressure HCl cleaning of the surface and furnace, a predetermined ratio of silane and a gaseous phosphorous containing compound taken from the class consisting of phosphorous trichloride, tertiary butyl phosphine, isobutyl phosphine, trimethyl phosphate and tetramethyl phosphate are simultaneously passed through the furnace at predetermined pressure and temperature to provide a uniformly phosphorous doped layer of polysilicon on the surface.
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Barndt B. Peter
Chaudhuri Olik
Donaldson Richard L.
Fourson G.
Kesterson James C.
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