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Point Defect Engineering Applied to Shallow Junction ULSI Processing

Published online by Cambridge University Press:  21 February 2011

George A. Rozgonyi
Affiliation:
North Carolina State University Department of Materials Science and Engineering Raleigh, NC 27695–7916
J. W. Honeycutt
Affiliation:
North Carolina State University Department of Materials Science and Engineering Raleigh, NC 27695–7916
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Abstract

We describe how a simple qualitative understanding of the interfacial reactions occurring during typical ULSI processes for junction formation, dopant activation, and contact silicidation can be used to eliminate end-of-range interstitial dislocation loops and beneficially impact the diffusion of dopants. Following a brief discussion of the well-documented effects of oxidation and nitridation on extended defects and dopant diffusion, conditions for elimination of implantation-induced defects are specified. Cross-section and plan-view TEM along with angle lapping and chemical etching of implanted and diffused junctions are presented to illustrate the application of point defect engineering to process technology.

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