Fishing – trapping – and vermin destroying
Patent
1991-10-29
1993-06-29
Hearn, Brian E.
Fishing, trapping, and vermin destroying
437160, 437168, 437169, H01L 21223
Patent
active
052234525
ABSTRACT:
A method and apparatus for doping silicon spheres (48) with a solid phosphorous source (41, 42) is disclosed. Two solid sheets (41, 42) of solid phosphorous source are held in a chamber (32) and aligned substantially parallel to one another for holding the plurality of silicon spheres therebetween. The chamber (32) temperature is increased to vaporize the sheets (41 and 42) to evenly diffuse phosphorous vapor into the silicon spheres (48).
REFERENCES:
patent: 3986905 (1976-10-01), Garavaglia
patent: 3998659 (1976-12-01), Wakefield
patent: 4661177 (1987-04-01), Powell
patent: 4789596 (1988-12-01), Allen et al.
Burke Richter Darryl
Dang Trung
Donaldson Richard L.
Hearn Brian E.
Kesterson James C.
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