Patent ID: 7088019

Claim:
A MEMS device including a rotor including an aperture, a shaft extending through the aperture, and a stator attached to the shaft, the device including one or more grooves located to form at least one air bearing between the rotor and at least one of the stator and the shaft upon rotation of the rotor around the shaft; said one or more grooves generating an air flow in a gap between the rotor and the shaft forming said air bearing; said shaft including a frustoconical section opposing a frustoconical surface of the rotor, wherein the air bearing is formed between the frustoconical section and the frustoconical surface upon rotation of the rotor, said frustoconical surface of the shaft being formed on a wide portion of the shaft located within a chamber included in a substrate, said rotor including two joined substrates defining said chamber between them; said two substrates of the rotor sandwiching a metal layer.