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Testing method and testing device for semiconductor integrated circuits

  • US 6,879,174 B2
  • Filed: 08/30/2001
  • Issued: 04/12/2005
  • Est. Priority Date: 09/29/2000
  • Status: Expired due to Fees
First Claim
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1. A testing method for semiconductor integrated circuits,said testing method testing by a semiconductor testing apparatus having a comparison judgment circuit judging a semiconductor integrated circuit integrated with a plurality of DA converters and a base voltage generation circuit determining gradation output voltage characteristics, by comparison of gradation output voltages of the semiconductor integrated circuit and reference voltages, comprising:

  • deciding gradation level intervals to be the test objects by the setting of different voltages to be applied at the base power supply input terminals of said base voltage generation circuit;

    supplying said gradation output voltages at and between said voltages applied to said base power supply input terminals from said semiconductor testing apparatus; and

    based on a correspondence between input gradation data signals of the gradation levels for a gradation level interval, and the gradation output voltages, testing the gradation output voltage through said semiconductor testing apparatus by making a digital judgment.

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