Fishing – trapping – and vermin destroying
Patent
1991-10-15
1993-07-06
Hearn, Brian E.
Fishing, trapping, and vermin destroying
437225, 437228, 118620, 118715, 427587, 427588, H01L 2100, H01L 2102, H01L 2120, H01L 21205
Patent
active
052253783
ABSTRACT:
Phosphor-doped silicon films are simultaneously formed on semiconductor wafers, respectively. The semiconductor wafers are contained in a reaction tube whose interior temperature is controlled to 500.degree. C. Si.sub.2 H.sub.6 and PH.sub.3 are introduced into the reaction tube. PH.sub.3 is preheated to 400.degree. C. in a gas activating unit before being introduced into the reaction tube. By virtue of the preheating, the thermal decomposition of PH.sub.3 carried out in the reaction tube is accelerated.
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Everhart B.
Hearn Brian E.
Tokyo Electron Limited
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