Patent ID: 8435349
Filing Date: 2013-05-07
Classification: C23C,C30B,H01L

Abstract:
1. Epitaxial reactor for the mass production of wafers, which comprises a tight chamber ( 25 ) with a tilted upper wall, externally water cooled and internally covered by reflective material, which is coupled to a gas recycling system and which contains a variable number of stacked, vertical and parallel susceptors ( 4 ), heated by Joule effect, and semiconductor plates on the susceptors held to them by pieces of their same material, and further comprises a housing ( 2 ) which slides on rails to open and close the chamber by uncoupling or coupling to a connection panel ( 1 ) said reactor including among its components: a fixed connection panel ( 1 ), where electrical ( 7 ) and thermocouple ( 8 ) connections, and gas inlet ( 5 ) and outlet ( 6 ) are found, together with a pre-chamber ( 3 ) fixed to the panel ( 1 ) where these electrical connections ( 7 ) connect very hot susceptors ( 4 ) to standard electrical feedthroughs that cannot stand high temperatures, with a temperature difference between them of greater than 600° C., and which comprise a thick, highly radiating prolongation ( 12 ) of the same conductive material as the susceptors ( 4 ), coupled to a housing coming out of the connection panel ( 1 ), with internal absorbent walls ( 13 ) and external water cooling ( 14 ), the pre-chamber ( 3 ) containing, on one hand, hollow columns ( 16 ) holding its structure, allocating hollow ceramic tubes ( 17 ) on which susceptors ( 4 ) stand, and thermocouples, whose cables are kept in an inert atmosphere until they reach the outer side, and containing, on the other hand, a gas distributor ( 19 ) to distribute the inlet gas throughout the space below the susceptors ( 4 ) in a laminar regime, and, finally, an upper wall ( 21 ) comprising or covered by reflective material that reflects the radiation emitted by the susceptors ( 4 ) placed just above the pre-chamber ( 3 ).