Patent ID: 6925710
Filing Date: 2005-08-09
Classification: B81B,B81C,Y10T

Abstract:
1. A method for making a microelectromechanical combdrive device, comprising: forming a moveable element from a first device layer; attaching a second device layer to the first device layer forming a first set of comb teeth from the second device layer, wherein one or more comb teeth in the first set extend from a major surface of the moveable element; attaching a third device layer to the second device layer; and forming a second set of comb teeth from the third device layer, wherein the first set of comb teeth are aligned to the moveable element by: before attaching the second device layer to the first device layer, forming an alignment target in the first device layer, and after attaching the second device layer to the first device layer and before forming the first set of comb teeth, forming an alignment hole in the second device layer, wherein the alignment hole is roughly aligned to the alignment target.