Patent ID: 8529724

Claim:
A method for anodic bonding at least a portion of a MEMS device, the method comprising: providing a first layer comprising a glass; providing a first substrate comprising a polycrystalline material having an elastic modulus greater than about 300 gigaPascals; causing a first surface of the first substrate to have an RMS surface roughness of greater than 0.001 μm and less than about 0.2 μm; directly contacting the first surface of the first substrate to a surface of the first layer; and applying a voltage between the first layer and the first substrate, through electrical contacts in direct contact with each of the first layer and the material having an elastic modulus greater than about 300 gigaPascals, to cause an effective anodic bond to form directly between the first layer and the first substrate; wherein the method further comprises causing the first layer and the first substrate to have a temperature that does not exceed about 350° C. while applying the voltage.