Protecting silicon germanium sidewall with silicon for strained silicon/silicon mosfets
First Claim
Patent Images
1. A semiconductor structure, comprising:
- a substrate;
a raised source region comprising a first strained silicon layer over SiGe on the substrate;
a raised drain region comprising a second strained silicon layer over SiGe on the substrate; and
a first silicon layer over the raised source region and a second silicon layer over the raised drain region.
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Accused Products
Abstract
Raised Si/SiGe source and drain regions include epitaxially grown silicon on SiGe sidewalls. The epi silicon prevents adverse effects of Ge during silicidation, including Ge out diffusion and silicide line breakage. The Si also increases the active area.
121 Citations
18 Claims
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1. A semiconductor structure, comprising:
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a substrate; a raised source region comprising a first strained silicon layer over SiGe on the substrate; a raised drain region comprising a second strained silicon layer over SiGe on the substrate; and a first silicon layer over the raised source region and a second silicon layer over the raised drain region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A semiconductor structure, comprising:
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a substrate; a raised source region comprised of a first SiGe layer on the substrate; a first strained silicon layer formed on the first SiGe layer; a first silicon layer formed on the first strained silicon layer; a first silicide layer formed on the first silicon layer; a raised drain region comprised of a second SiGe layer on the substrate; a second strained silicon layer fonned on the second SiGe layer; a second silicon layer formed on the source second silicon layer; and a second silicide layer formed on the second silicon layer. - View Dependent Claims (15, 16, 17, 18)
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Specification