Patent ID: 8752435

Claim:
A Fabry-Perot (FP) sensor comprising: a substrate; and a diaphragm mounted on the substrate, the diaphragm having a center and comprising: a first layer comprising a first material; and a second layer comprising a second material, the second layer forming one of a dot and a ring; wherein: if the second layer comprises a dot, the dot is mounted on the first layer and centered about the center of the diaphragm, the second material comprises internal pre-stresses to cause the center of the diaphragm to camber away from the substrate upon relaxing the internal pre-stresses; and if the second layer comprises a ring, the ring is mounted on the first layer and centered about the center of the diaphragm, the second material comprises internal pre-stresses to cause a peripheral area about the center of the diaphragm to camber away from the substrate upon relaxing the internal pre-stresses.