Patent ID: 8735200

Claim:
A method of fabricating an electrothermal micro-electrical-mechanical system (MEMS), the method comprising: providing a silicon-on-insulator (SOI) substrate having a silicon bulk layer, a buried oxide layer and a silicon device layer; forming a first insulating pattern on the SOI substrate including a contact pad region; depositing a first bimorph material layer of tungsten, 64FeNi, or diamond-like carbon (DLC) on the SOI substrate including the first insulating pattern; depositing a first oxide on the first bimorph material layer and etching the first oxide to form a first oxide pattern defining a bimorph beam and the contact pad region; etching the first bimorph material layer using the first oxide pattern as an etch mask; depositing a second bimorph material on the SOI substrate including the etched first bimorph material and patterning the deposited second bimorph material to form a platform on the SOI substrate and the bimorph beam comprising the first bimorph material layer, and the patterned second bimorph material layer; performing a first backside-etch of the silicon bulk layer to expose the buried oxide layer below the bimorph beam and the platform; performing a second backside-etch of the buried oxide layer to expose the silicon device layer below the bimorph beam and the platform; and performing a front-side etching of the silicon device layer to release the bimorph beam after the performing of the first backside-etch and the second backside-etch.