UNSPECIFIED (1994) SECONDARY-ION MASS-SPECTROMETRY ANALYSIS OF ULTRATHIN IMPURITY LAYERS IN SEMICONDUCTORS AND THEIR USE IN QUANTIFICATION, INSTRUMENTAL ASSESSMENT, AND FUNDAMENTAL MEASUREMENTS. In: 2nd International Workshop on the Measurement and Characterization of Ultra-Shallow Doping Profiles in Semiconductors, MAR 23-25, 1993, MCNC, CTR MICROELECTR, RESEARCH TRIANGLE PK, NC.

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Abstract

The subject of this review is the secondary ion mass spectrometry (SIMS) analysis of ultrathin or delta layers of impurity in a semiconductor matrix and their use in establishing the limitations of SIMS depth profiling, exploring the fundamental processes occurring during analysis, and enhancing the quantification of SIMS data. Methods for extracting accurate information for the grower (concerning the material) and the analyst (concerning the SIMS instrument) are described. It is demonstrated that sets of SIMS profiles obtained over a range of analytical conditions are desirable if accurate information is required. In this context, the observation of dopant interaction occurring in codoped samples during SIMS analysis is reported for the first time. It is shown that quite large discrepancies exist between different measurements of decay length and associated parameters for the same impurity/matrix combination. These need to be explained before attempting to relate delta profile shape to primary ion beam induced mass transport mechanisms. The concept of the delta profile as a response function and the use of deconvolution as a complete quantification method are discussed. The use of delta profiles in setting up models of the ion-solid interaction such as IMPETUS is illustrated.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology Q Science > QC Physics
Journal or Publication Title:	JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
Publisher:	AMER INST PHYSICS
ISSN:	1071-1023
Date:	January 1994
Volume:	12
Number:	1
Number of Pages:	13
Page Range:	pp. 186-198
Publication Status:	Published
Title of Event:	2nd International Workshop on the Measurement and Characterization of Ultra-Shallow Doping Profiles in Semiconductors
Location of Event:	MCNC, CTR MICROELECTR, RESEARCH TRIANGLE PK, NC
Date(s) of Event:	MAR 23-25, 1993
URI:	http://wrap.warwick.ac.uk/id/eprint/20810

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