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:
Feb. 02, 2010
Filed:
Aug. 06, 2007
Applicant:
Jong Koo Kang, Yongin, KR;
Inventor:
Jong Koo Kang, Yongin, KR;
Assignee:
UniTest Inc., Yongin-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/02 (2006.01); G01R 31/00 (2006.01); G01R 31/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for calibrating a semiconductor device tester is disclosed. In accordance with method of the present invention, a timing is calibrated using a programmable delay device and calibration boards so as to remove a timing difference between channels and compensate a linearity of the programmable delay device for an adjustment of a timing by building and using a database of the round trip delay actually generated during the test.