×

Method and apparatus for depth profile analysis by laser induced plasma spectros copy

  • US 6,532,068 B2
  • Filed: 07/17/2001
  • Issued: 03/11/2003
  • Est. Priority Date: 07/17/2001
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of spectrochemical depth-profile analysis of heterogeneous material, comprising:

  • a) directing a first burst of ablation laser pulses in a first beam at a sample to form an ablation crater with a bottom and wall;

    b) directing a second single pulse or burst of laser pulses in a second beam having a smaller width than said first beam at the bottom of said crater so as to create a plasma that emits radiation representative of a component in the sample without significant contribution from the wall of the ablation crater, c) measuring the intensity of radiation from said plasma;

    d) determining the concentration of said selected component in said material from the intensity of said radiation; and

    e) evaluating the depth at which said plasma is created.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×