Patent ID: 8372683

Claim:
An RTP heating system for heating a photovoltaic-device intermediate product having a glass substrate, a Mo layer coated on the glass substrate, and a light absorption layer in formation, comprising: a chamber for receiving the photovoltaic-device intermediate product internally; a support member having good thermal conductivity and high specific heat and located in a lower side of the chamber for supporting the photovoltaic-device intermediate product and thermally conducting a lower surface of the photovoltaic-device intermediate product; at least one heating element mounted above the chamber for emitting infrared rays of a predetermined wavelength downwardly to heat an upper surface of the photovoltaic-device intermediate product, the Mo layer reflecting most of the infrared rays so that the glass substrate is heated less and the light absorption layer is heated more wherein each of the infrared rays emitted by the at least one heating element has a wavelength of 3500-4500 A; a plurality of temperature sensors mounted in the chamber for sensing separately the temperatures of the upper and lower surfaces of the photovoltaic-device intermediate product; and a temperature control device connected with the temperature sensors, the at least one heating element, and the support member for controlling at least one thermal source from the heating element and the support member.