US Patent:
20010009177, Jul 26, 2001
Inventors:
LAIZHONG LUO - FREMONT CA, US
YING HOLDEN - FREMONT CA, US
RENE GEORGE - SAN JOSE CA, US
ROBERT GUERRA - FREMONT CA, US
ALLAN WEISNOSKI - PLEASANTON CA, US
NICOLE KUHL - SUNNYVALE CA, US
CRAIG RANFT - FREMONT CA, US
SAI MANTRIPRAGADA - SUNNYVALE CA, US
MASAYUKI KOJIMA - TOKYO, JP
MAKI SHIMODA - TOKYO, JP
TAKAHIRO CHIBA - IBARAKI, JP
HIDEYUKI SUGA - TOKYO, JP
KAZUBIKO KAWAI - TOKYO, JP
International Classification:
H01L021/00
Abstract:
A system and method for two-sided etch of a semiconductor substrate. Reactive species are generated and flowed toward a substrate for processing. A diverter is positioned between the generation chamber and the substrate. A portion of the reactive species flows through the diverter for processing the front of the substrate. Another portion is diverted around the substrate to the backside for processing. A flow restricter is placed between the substrate and the exhaust system to increase the residence time of reactive species adjacent to the backside.