Patent ID: 7938977
Filing Date: 2011-05-10
Classification: G02B

Abstract:
1. A method of modulating the resonant frequency of a torsional MEMS device, comprising: providing a torsional MEMS device, the torsional MEMS device comprising a support structure, a platform, and at least two hinges connecting the support structure and the platform, in which the platform comprises an active area and a non-active area, wherein a plurality of sacrificial elements is disposed in the non-active area; performing a resonant frequency test to measure a raw resonant frequency of the torsional MEMS device, and comparing the raw resonant frequency to a standard resonant frequency; and removing at least one sacrificial element from the torsional MEMS device if the raw resonant frequency is less than the standard resonant frequency to modulate the raw resonant frequency approaching to the standard resonant frequency.