Patent ID: 6156663
Filing Date: 2000-12-05
Classification: C23F,H01J,H01L

Abstract:
An etching method of a wiring material for etching a multi-layered or single-layered Al wiring formed on a semiconductor substrate, whereina processing gas for etching is a mixed gas comprising at least one member selected from the group consisting of BCl.sub.3, Cl.sub.2, CHCl.sub.3 or other C.sub.x H.sub.y Cl.sub.z (where each of x, y and z is 0 to 8) and C.sub.x H.sub.y Br.sub.z (where each of x, y and z is 0 to 8) gases and at least one member selected from the group of Ar, Xe and Kr gases; andan organic component of carbon (C) and an organic component of CH included in a plasma form a side wall protective film of a sample being processed by C.sub.x H.sub.y gas.