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Related Concept Videos

Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...

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[Raman analysis of SiGe films grown by UHV/CVD].

P Zhu1, P Chen, C Li

  • 1Institute of Microelectronics, Tsinghua University, 100084 Beijing.

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|August 30, 2003
PubMed
Summary
This summary is machine-generated.

A novel Raman spectroscopy method accurately measures germanium (Ge) content and strain in silicon germanium (SiGe) alloy films. This reliable technique was validated against X-ray diffraction, confirming its precision for semiconductor applications.

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Spectroscopy

Context:

  • Silicon-germanium (SiGe) alloy films are crucial in modern semiconductor devices.
  • Accurate characterization of Ge content and strain is essential for optimizing SiGe-based electronics.
  • Existing characterization methods can be complex or destructive.

Purpose:

  • To introduce a non-destructive Raman spectroscopy method for quantifying Ge content and strain in SiGe films.
  • To validate the accuracy and reliability of the proposed Raman method.
  • To demonstrate the application of characterized SiGe films in fabricating high-performance devices.

Summary:

  • A non-destructive Raman spectroscopy technique was developed to measure germanium (Ge) content and strain in silicon-germanium (SiGe) alloy films grown by UHV/CVD.
  • The method's reliability was confirmed by consistent results compared to double-crystal X-ray diffraction (DCXRD).
  • SiGe films characterized by Raman spectroscopy were used to fabricate a PHMOSFET, achieving a high transconductance of 112 mS/mm.

Impact:

  • Provides a reliable, accurate, and non-destructive method for SiGe film characterization.
  • Enables precise control over material properties for advanced semiconductor device fabrication.
  • Demonstrates the potential for enhanced performance in SiGe-based electronic devices.