Patent ID: 11932529
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Optics (Instruments)
Classification: CPC B  G | IPC B  G

Claim 2:
3. A method for fabricating a microelectromechanical system (MEMS) device, the method comprising:
forming a sacrificial layer on a spring tip, the spring tip over a substrate, wherein the spring tip has a first wedge shaped protrusion having a first edge;
performing gray-scale lithography with a photomask including both partial and complete concentric opaque circles on the sacrificial layer to form a depression in the sacrificial layer;
depositing a deformable layer on the sacrificial layer and in the depression, wherein the deformable layer has a curved portion corresponding to the depression and the deformable layer is coupled to the substrate, wherein the curved portion of the deformable layer forms a second edge shaped protrusion having a second edge on a side of the deformable layer facing the spring tip, the second edge shaped protrusion corresponding to the depression in the sacrificial layer; and
removing the sacrificial layer, wherein the second edge is configured to contact the first edge.