MOS devices with source/drain regions having stressed regions and non-stressed regions
First Claim
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1. A semiconductor structure comprising:
- a semiconductor substrate;
a gate stack on the semiconductor substrate;
a source region comprising;
a first stressor having at least a portion in the semiconductor substrate and adjacent to the gate stack;
a first portion of the semiconductor substrate adjoining the first stressor and on an opposite side of the first stressor from the gate stack; and
a drain region comprising;
a second stressor having at least a portion in the semiconductor substrate and on an opposite side of the gate stack than the first stressor; and
a second portion of the semiconductor substrate adjoining the second stressor and on an opposite side of the second stressor from the gate stack, wherein the first and the second stressors and the first and the second portions of the semiconductor substrate are doped with impurities of a same conductivity type.
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Abstract
A semiconductor structure includes a semiconductor substrate; a gate stack on the semiconductor substrate; a stressor having at least a portion in the semiconductor substrate and adjacent to the gate stack, wherein the stressor comprises an impurity of a first conductivity type; and a portion of the semiconductor substrate adjoining the stressor and on an opposite side of the stressor from the gate stack, wherein the portion of the semiconductor substrate is doped with an impurity of the first conductivity type.
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Citations
14 Claims
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1. A semiconductor structure comprising:
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a semiconductor substrate; a gate stack on the semiconductor substrate; a source region comprising; a first stressor having at least a portion in the semiconductor substrate and adjacent to the gate stack; a first portion of the semiconductor substrate adjoining the first stressor and on an opposite side of the first stressor from the gate stack; and a drain region comprising; a second stressor having at least a portion in the semiconductor substrate and on an opposite side of the gate stack than the first stressor; and a second portion of the semiconductor substrate adjoining the second stressor and on an opposite side of the second stressor from the gate stack, wherein the first and the second stressors and the first and the second portions of the semiconductor substrate are doped with impurities of a same conductivity type. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A semiconductor structure comprising:
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a semiconductor substrate; a first metal-oxide-semiconductor (MOS) device comprising; a first gate stack on the semiconductor substrate; a first stressor having at least a portion in the semiconductor substrate and adjacent to the first gate stack, wherein the first stressor comprises an impurity of a first conductivity type; and a first portion of the semiconductor substrate adjoining the first stressor and on an opposite side of the first stressor from the first gate stack, wherein the first portion of the semiconductor substrate is doped with an impurity of the first conductivity type; and a second MOS device comprising; a second gate stack on the semiconductor substrate; a second stressor having at least a portion in the semiconductor substrate and adjacent to the second gate stack, wherein the second stressor comprises an impurity of the first conductivity type; and a second portion of the semiconductor substrate adjoining the second stressor and on an opposite side of the second stressor from the second gate stack, wherein the second portion of the semiconductor substrate is doped with an impurity of the first conductivity type; and a third portion of the semiconductor substrate between and adjoining the first and the second portions of the semiconductor substrate. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification