Patent ID: 6136631
Filing Date: 2000-10-24
Classification: B81B,G01P

Abstract:
A method for producing a microelectronic integrated sensor of the type having sensor body with a void formed therein, a cantilever and a support disposed in the void, and lateral and upper motion limiters spaced apart from an edge of the cantilever, the method which comprises:forming a first oxide layer on a substrate;structuring a first polysilicon layer for forming the support;depositing a second oxide layer thereon and substantially covering the support;depositing, doping, and recrystallizing a second polysilicon layer for forming the cantilever;forming an array of holes in the second polysilicon layer in preparation for a subsequent isotropic etching of the first and second oxide layers;depositing and structuring a third oxide layer thereon;depositing a fourth oxide layer on the third oxide layer and on bared portions of the cantilever;forming a cover by depositing a third polysilicon layer;forming an array of holes in the third polysilicon layer for introducing an etchant; andforming the void in the microelectronic sensor by isotropic oxide etching.