Patent ID: 6483283
Filing Date: 2002-11-19
Classification: B81B,B81C,G01P

Abstract:
An apparatus for use in a semiconductor physical quantity sensor manufacturing method employing a SOI substrate composed of a silicon substrate as a first layer, an insulating layer as a second sacrifice layer formed on said first layer, and a silicon or polysilicon layer as a third layer formed on said second layer, said method including coating said third layer with protective film, forming a sensing element by using said protective film as a mask, removing said second sacrifice layer by wet etching, substituting an etching liquid used in said wet etching with a displacement liquid, drying said sensing element by removing said displacement liquid sticking on said sensing element in a state wherein an acceleration in an opposite direction to a direction toward said first layer is applied to said sensing element, and removing said protective film by dry etching, said apparatus comprising:a rotary shaft; a drying tank; and a support plate for fixing said SOI substrate; at least one of said rotary shaft and said drying tank having holes for spraying said displacement liquid.