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:
Jul. 10, 1990
Filed:
Oct. 14, 1988
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a method of electrically testing an active matrix substrate having a plurality of semiconductor switching devices, a row group of a plurality of parallel conductors and a column group of a plurality of parallel conductors, a gate electrode of each of the semiconductor switching devices being connected to one of the conductors of the row group, and a source electrode of each of the semiconductor switching devices being connected to one of the conductors of the column group, there are provided the steps of short-circuiting the conductors of the row group at both ends thereof; short-circuiting the conductors of the column group at both ends thereof; applying a predetermined voltage between the row and column groups of the conductors; and measuring a current flowing from the row group to the column group of the conductors. Moreover, in determining whether the active matrix substrate is defective, there is also provided the step of determining whether the following formula is satisfied or not: