The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2018
Filed:
Oct. 20, 2015
Applicant:
Aehr Test Systems, Fremont, CA (US);
Inventors:
Donald P. Richmond, II, Palo Alto, CA (US);
David S. Hendrickson, San Jose, CA (US);
Assignee:
Aehr Test Systems, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 1/067 (2006.01); G01R 31/28 (2006.01);
U.S. Cl.
CPC ...
G01R 1/06766 (2013.01); G01R 31/2879 (2013.01);
Abstract
A tester is described having output circuits that are operable in either power mode or driver mode. A switching circuit connects force and sense lines to one of the output circuits when in power mode, or connects the same lines separately to the output circuits when in driver mode. A further configuration allows for power to be provided through the lines separately while detecting a measure of power through each line and correcting for unknown resistances of leads connected to the lines.