Patent ID: 6465355
Filing Date: 2002-10-15
Classification: B81B,B81C

Abstract:
A method of fabricating a suspended platform on a bonded-substrate that includes a platform substrate that is bonded to a base substrate, comprising:forming a dielectric layer on a support surface of the base substrate; patterning an interface surface of the dielectric layer to define a well feature thereon; etching the well feature until a well having a preselected depth that leaves a thin protective layer of the dielectric layer covering the support surface is formed; bonding the base and platform substrates to each other by urging the interface surface into contact with a mounting surface of the platform substrate and annealing the base and platform substrates to fusion bond the interface surface with the mounting surface; thinning the platform substrate to form a membrane over a sealed cavity defined by the well and the mounting surface; patterning the membrane to define a flexture feature and a platform feature; etching the flexture and platform features to form a plurality of trenches that extend through the membrane to the sealed cavity and define a suspended platform and a flexure; and applying a selective etch material to remove the dielectric layer from beneath the suspended platform and the flexure.