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:
Nov. 13, 2001
Filed:
Jan. 18, 2000
Munehiro Yamashita, Sakurai, JP;
Nidec-Read Corporation, Uji, JP;
Abstract
A testing apparatus and method for testing conductivity of electric pathways formed on a substrate, each pathway including a first wiring and a second wiring partially overlapping each other. The apparatus includes a first electric signal applier for applying a first electric signal having an electric parameter changing with time to an input portion of the first wiring, a first electrode facing a first portion of the second wiring, a second electrode facing a second portion of the second wiring, a second electric signal applier for applying to the second a electrode a second electric signal changing its electric parameter in the phase reverse to that of the first electric signal, and a monitor for monitoring the signal transmitted to the first electrode through its capacitive coupling.