Patent ID: 6382964
Filing Date: 2002-05-07
Classification: C03C,H05K

Abstract:
A firing apparatus for uniformly heat-treating a substrate having a film-forming composition thereon, comprising:shutter devices which partially define a first and a second heating chamber such that said first and second heating chambers are thermally insulated from each other; a heating device for controlling temperatures in said first and second heating chambers, independently of each other; a feeding device for feeding said substrate into said first and second heating chambers alternately, so that said substrate is heat-treated in said first and second chambers alternately; and a control device for controlling said heating device to maintain the temperature in said first heating chamber at a predetermined first value while said substrate is heat-treated in said first heating chamber, and adjusting the temperature in said second heating chamber to a predetermined second value different from said predetermined first value by a predetermined difference while said substrate is heat-treated in said first heating chamber, said control device adjusting the temperature in said first heating chamber to a predetermined third value different from said predetermined second value by a predetermined difference while said substrate is heat-treated in said second heating chamber, so that said substrate is then heat-treated in said first heating chamber at said third value.