Silicon transducer with composite beam
First Claim
1. A silicon microstructure comprising a silicon wafer having a substrate and a monocrystalline silicon layer separated by a buried silicon dioxide layer, said silicon dioxide layer including a cavity, said microstructure including a composite beam spanning said cavity and having adjacent silicon and silicon nitride layers, said beam being self-supporting.
4 Assignments
0 Petitions
Accused Products
Abstract
A simox wafer includes substrate (1), simox silicon dioxide layer (2) and monocrystalline simox silicon layer (3). An additional silicon nitride layer (5) is deposited on top of silicon layer (3) to allow the fabrication of a monocrystalline beam (4) by selectively etching the dioxide layer (2). The thermal insulating property of the resultant beam (4) offers an ideal site for construction of thermocouples (29), light modulators (60) and active components such as p-n diodes (34), MOS transistors (47) and bipolar transistors.
19 Citations
22 Claims
- 1. A silicon microstructure comprising a silicon wafer having a substrate and a monocrystalline silicon layer separated by a buried silicon dioxide layer, said silicon dioxide layer including a cavity, said microstructure including a composite beam spanning said cavity and having adjacent silicon and silicon nitride layers, said beam being self-supporting.
Specification