Coating processes – Coating by vapor – gas – or smoke – Mixture of vapors or gases utilized
Patent
1987-10-27
1988-12-13
Morgenstern, Norman
Coating processes
Coating by vapor, gas, or smoke
Mixture of vapors or gases utilized
437236, 437240, 501 54, C23C 1600, B05D 512, C03C 306
Patent
active
047910054
ABSTRACT:
A method for the manufacture of silicon layers containing boron and phosphorus dopants wherein the silicon wafers are positioned in a reaction chamber into which there is introduced, from separate sources, (a) tetraethylorthosilicate as a source of silicon dioxide, (b) trimethylborate as a source of boron, and (c) a phosphorus source. The three reactants are decomposed in the reaction chamber to deposit silicon dioxide doped with boron and phosphorus onto the wafers, the decomposition being carried out at a temperature of at least 600.degree. C. and at a substantially subatmospheric pressure.
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Becker Frank S.
Pawlik Dieter
Morgenstern Norman
Padgett Marianne L.
Siemens Aktiengesellschaft
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