Patent ID: 9632308
Date: 2017-04-25
CPC Classifications: B81B,B81C,G02B,G03F

Claim:
1. A method of fabricating a microelectromechanical system (MEMS) device, comprising: depositing a first photoresist spacer layer above a substrate with circuits formed therein; patterning hinge via openings within the first photoresist spacer layer; depositing a hinge metal layer above the first photoresist spacer layer and within the hinge via openings to form a hinge and hinge vias; depositing a capping layer above the hinge metal layer and above the hinge vias; depositing a second photoresist spacer layer above the capping layer; using a developer solution to pattern a mirror via opening within the second photoresist spacer layer, wherein the capping layer at a bottom of the mirror via opening prevents the developer solution from touching the hinge metal layer; removing the capping layer exposed at the bottom of the mirror via opening to expose the hinge metal layer at the bottom of the mirror via opening; depositing a mirror metal within the mirror via opening and above the second photoresist spacer layer to form a mirror and mirror via, wherein the mirror metal contacts the hinge metal layer at a bottom of the mirror via; removing the first and second photoresist spacer layers and capping layer using an oxygen ash to release the hinge and the mirror.