Electric resistance heating devices – Heating devices – Radiant heater
Reexamination Certificate
2004-06-18
2008-03-18
Paik, Sang (Department: 3742)
Electric resistance heating devices
Heating devices
Radiant heater
C219S483000
Reexamination Certificate
active
07346273
ABSTRACT:
It is an object of the invention to provide a substrate processing equipment that can predict a temperature of a substrate and easily control temperature of the substrate. Formed in a reactor (processing chamber)3are four temperature adjustment zones, of which setting and adjustment of temperature can be made by zone heaters340-1to340-4. A temperature controller4mixes temperatures detected by inner thermocouples302-1to302-4and outer thermocouples342-1to342-4to calculate predicted temperatures of substrates by means of the first-order lag calculation on the basis of time constants of temperatures of substrates heated by the zone heaters340-1to340-4. Also, the temperature controller4calculates electric power values (operating variables) for the zone heaters340-1to340-4with the use of predicted temperatures of substrates to output the same to the zone heaters340-1to340-4.
REFERENCES:
patent: 5593608 (1997-01-01), Suzuki
patent: 6495805 (2002-12-01), Sakamoto et al.
patent: A 07-283158 (1995-10-01), None
patent: A 2002-091574 (2002-03-01), None
patent: A 2002-175123 (2002-06-01), None
Sugishita Masashi
Tanaka Kazuo
Ueno Masaaki
Hitachi Kokusai Electric Inc
Oliff & Berridg,e PLC
Paik Sang
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