US 12,007,428 B2
Systems and methods for multidimensional dynamic part average testing
Kenneth Butler, San Jose, CA (US); Ira Leventhal, San Jose, CA (US); Constantinos Xanthopoulos, San Jose, CA (US); Alan Hart, San Jose, CA (US); Brian Buras, San Jose, CA (US); and Keith Schaub, San Jose, CA (US)
Assigned to ADVANTEST CORPORATION, Tokyo (JP)
Filed by Advantest Corporation, Tokyo (JP)
Filed on Oct. 8, 2021, as Appl. No. 17/497,518.
Prior Publication US 2023/0111543 A1, Apr. 13, 2023
Int. Cl. G01R 31/26 (2020.01)
CPC G01R 31/2601 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method of dynamic parts average testing, the method comprising:
determining testing limits based on historic testing result data;
testing a plurality of portions of a material according to the testing limits to obtain test results;
computing multivariate statistics using the test results;
computing mean or median values of the multivariate statistics;
computing differences between the multivariate statistics and the mean or median values;
updating the testing limits based on the mean or median values to produce updated testing limits;
identifying a trend indicating an out of control material drift of the material based on the mean or median values and the updated testing limits; and
halting testing of the plurality of portions of the material responsive to the identifying the trend.