Patent ID: 6270685
Filing Date: 2001-08-07
Classification: B81C,G01P,H01L

Abstract:
A method for producing a semiconductor dynamic sensor with a thick portion and a thin portion at a periphery of the thick portion, the method comprising steps of:providing a silicon substrate having a (100) crystal orientation and a substantially planar surface;forming an anisotropic etching mask on the surface of the silicon substrate with a main portion and a form-compensation portion formed at a corner of the main portion, a shape of the main portion being approximately the same as that of the thick portion, a shape of the form-compensation portion having a rectangular shape with a first side and a second side being longer than the first side, one of the first and the second sides stretching in a <011> direction of the silicon substrate, and the other side stretching in a <011> direction of the silicon substrate; andperforming anisotropic etching on the silicon substrate with the anisotropic etching mask so that the silicon substrate has the thin portion at the periphery of the thick portion.