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:
May. 04, 2004
Filed:
Dec. 17, 2002
Wendy Ann Belluomini, Austin, TX (US);
Chandler Todd McDowell, Austin, TX (US);
Sani Richard Nassif, Austin, TX (US);
Ying Liu, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An apparatus for measuring capacitance of a semiconductor device is disclosed. The apparatus includes a signal source circuit, a first transistor, a second transistor, and bypass capacitor. The first transistor is connected in series with the second transistor, and the second transistor is connected in series with a device under test. The bypass capacitor connected in parallel with the first and second transistors. Coupled to the first and second transistors, the signal source circuit generates a first signal and a second signal to alternately turn on said first and second transistors such that a discharge current is generated to flow through the first and second transistors.