Transistor with local insulator structure
First Claim
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1. An integrated circuit comprising:
- a first wafer layer including a plurality of insulator regions disposed in a first semiconductor substrate; and
a second wafer layer above and attached to the first wafer layer, the second wafer layer including a plurality of transistors disposed in a second semiconductor substrate, each of the transistors including a gate disposed between a source region and a drain region, each of the transistors being disposed above a respective insulator region of the insulator regions, wherein a thickness between the insulator region and the gate is less than 80 nm.
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Abstract
A thin filmed fully-depleted silicon-on-insulator (SOI) metal oxide semiconductor field defect transistor (MOSFET) utilizes a local insulation structure. The local insulative structure includes a buried silicon dioxide region under the channel region. The MOSFET body thickness is very small and yet silicon available outside of the channel region and buried silicon dioxide region is available for sufficient depths of silicide in the source and drain regions. The buried silicon dioxide region can be formed by a trench isolation technique or a LOCOS technique.
33 Citations
20 Claims
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1. An integrated circuit comprising:
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a first wafer layer including a plurality of insulator regions disposed in a first semiconductor substrate; and a second wafer layer above and attached to the first wafer layer, the second wafer layer including a plurality of transistors disposed in a second semiconductor substrate, each of the transistors including a gate disposed between a source region and a drain region, each of the transistors being disposed above a respective insulator region of the insulator regions, wherein a thickness between the insulator region and the gate is less than 80 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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- 9. An ultra-large scale integrated circuit comprising a plurality of field effect transistors, the transistors including a gate disposed above a channel region, the channel region being between a source region and a drain region, the channel region being located on a first substrate, the channel region being located above a local insulator means for reducing transient enhanced diffusion on a second substrate, the local insulator means is less than 80 nm from the gate, and the first substrate being attached to the second substrate.
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13. A compound semiconductor wafer, comprising:
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a first wafer including a plurality of insulation regions disposed in a semiconductor material; and a second wafer attached above the first wafer, the second wafer including a plurality of gate structures, the gate structures each being disposed between a source and a drain, each of the gate structures being disposed above a respective insulation region of the insulation regions, wherein a distance between a top of the insulation region and a bottom surface of the second wafer is less than 80 nm. - View Dependent Claims (14, 15, 16, 17, 19)
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20. An ultra-large scale integrated circuit comprising a plurality of field effect transistors, the transistors including a gate disposed above a channel region, the channel region being between a source region and a drain region, the channel region being located on a first substrate, the channel being located above a local insulator means for reducing transient enhanced diffusion on a second substrate, the local insulator means having a thickness of less than 50 nm and the first substrate being attached to the second substrate.
Specification