Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1999-03-29
2000-09-19
Walberg, Teresa
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
392416, 118724, 118725, F27B 514
Patent
active
061215805
ABSTRACT:
A lamp annealer for heating and annealing product wafers loaded into a chamber by a lamp means. The lamp annealer comprises a first chamber for loading product wafers, a second chamber disposed adjacent to the first chamber for loading only a dummy wafer, a pyrometer means for measuring a temperature of a wafer in the first chamber and a temperature of a wafer in the second chamber, and a lamp means for heating the wafer in the first chamber and the wafer in the second chamber. Periodically, dummy wafers are loaded into the first and second chambers, temperatures of the dummy wafer in the first chamber and the dummy wafer in the second chamber which are both heated by the lamp means are measured by the pyrometer means, and, when product wafers are annealed, intensity of light of the lamp is compensated based on a difference between the temperatures.
Fuqua Shawntina F.
NEC Corporation
Walberg Teresa
LandOfFree
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