Glass-ceramics for semiconductor doping

Details Glass-ceramics for semiconductor doping Glass-ceramics for semiconductor doping

1976-02-18

1979-07-10

Ozaki, G.

Compositions: coating or plastic

Coating or plastic compositions

Marking

148 22, 148189, 252950, C03C 322

Patent

active

041606728

ABSTRACT:
Disclosed are B.sub.2 O.sub.3 -containing glass-ceramic bodies made by in situ thermal crystallization of glasses and useful as a host for diffusion doping of semiconductors by the vapor phase transport of B.sub.2 O.sub.3 to the semiconductor from the glass-ceramic which in mole percent consists essentially of SiO.sub.2 15-40, Al.sub.2 O.sub.3 15-30, B.sub.2 O.sub.3 20-60, RO 5-25, La.sub.2 O.sub.3 0-5, Nb.sub.2 O.sub.5 0-5 and Ta.sub.2 O.sub.5 0-5 wherein RO is selected from MgO, CaO, SrO and BaO in specified percentages, and mixtures thereof and wherein the ratio Al.sub.2 O.sub.3 to RO is 1.5-4.

REFERENCES:
patent: 3852086 (1974-12-01), Murata et al.
patent: 3907618 (1975-09-01), Rapp
patent: 3928096 (1975-12-01), Vergano et al.
patent: 3961969 (1976-06-01), Rapp
patent: 3962000 (1976-06-01), Rapp

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