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The resolutions of drive-level capacitance profiling technique.

Xin Zhang1, Yang Ma2, Zihang Zhang2

  • 1Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China.

The Review of Scientific Instruments
|October 20, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a method to analyze the ranges and resolutions of drive level capacitance profiling (DLCP). It evaluates DLCP

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Area of Science:

  • Semiconductor Physics
  • Materials Science

Background:

  • Drive Level Capacitance Profiling (DLCP) is a key technique for characterizing defect distributions in semiconductors.
  • Existing DLCP methods lack detailed analysis of their measurement ranges and resolutions, hindering accurate defect profile evaluation.

Purpose of the Study:

  • To develop a novel method for analyzing the spatial and energetic ranges and resolutions of DLCP.
  • To establish a framework for evaluating DLCP's validity based on instrument-specific limitations.

Main Methods:

  • Revisiting DLCP equations to identify sources of error and resolution limits.
  • Applying error propagation theory to calculate DLCP resolutions based on instrument system error and device impedance.
  • Analyzing the spatial distribution of the AC signal range (δV) in DLCP.

Main Results:

  • Identified instrument system error and device impedance as primary factors limiting DLCP resolution.
  • Developed a method to calculate DLCP spatial resolution, adaptable to different test instruments.
  • Provided spatial distribution of the minimum AC signal selection range (δV).

Conclusions:

  • The proposed method enables quantitative evaluation of DLCP's spatial and energetic resolution.
  • This analysis is crucial for assessing the reliability of defect profiles obtained via DLCP.
  • The findings facilitate the selection of appropriate test instruments for accurate DLCP measurements.