Method of forming transistor having insulating spacers on gate sidewalls
First Claim
1. A transistor comprising a gate separated from a channel by an insulator and having insulating spacers adjacent to gate sidewalls to lap portions of extension regions from a source and a drain into the channel.
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Abstract
A transistor comprising a gate, a channel beneath the gate and separated from the gate by an insulator, a source adjacent to the channel on a first side of the gate, a drain adjacent to the channel on a second side of the gate, doped extension regions into the channel from the source and the drain that underlap the gate, and insulating spacers adjacent to sidewalls of the gate that overlap the extension regions. The insulating spacers may be used to align the doped extension regions, offset the extension regions from the gate, and reduce Miller capacitance and standby leakage current.
65 Citations
32 Claims
- 1. A transistor comprising a gate separated from a channel by an insulator and having insulating spacers adjacent to gate sidewalls to lap portions of extension regions from a source and a drain into the channel.
- 8. A transistor comprising a gate, a channel beneath the gate and separated from the gate by an insulator, a source adjacent to the channel on a first side of the gate, a drain adjacent to the channel on a second side of the gate, extension regions into the channel from the source and the drain that underlap the gate, and insulating spacers adjacent to sidewalls of the gate that overlap the extension regions.
- 13. A transistor comprising a gate, a channel beneath the gate and separated from the gate by an insulator, a source adjacent to the channel on a first side of the gate, a drain adjacent to the channel on a second side of the gate, extension regions into the channel from the source and the drain that underlap the gate, and spacer means adjacent to sidewalls of the gate for reducing an overlap of the gate with the extension regions.
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16. An integrated circuit comprising:
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a first transistor containing a gate separated from a channel by an insulator and having insulating spacers adjacent to gate sidewalls to lap portions of extension regions from a source and a drain into the channel; and
a second transistor electrically coupled with the first transistor. - View Dependent Claims (17, 18, 19, 20)
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21. A method for fabricating a transistor comprising:
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forming an insulated gate;
forming insulating spacers adjacent to sidewalls of the gate;
forming extension regions after forming the insulating spacers; and
forming a source and a drain. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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- 30. A transistor comprising a gate, a channel beneath the gate and separated from the gate by an insulator, a source adjacent to the channel on a first side of the gate, a drain adjacent to the channel on a second side of the gate, and extension regions into the channel from the source and the drain that underlap the gate, wherein the extension regions comprise doped regions containing ions introduced into the regions into alignment with outer edges of insulating sidewall spacers adjacent to sidewalls of the gate.
Specification