Process for inspecting electrodes using rotation alignment corre

Details Process for inspecting electrodes using rotation alignment corre Process for inspecting electrodes using rotation alignment corre

1994-02-28

1996-07-16

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

356401, 348 87, G01R 104, G01R 1073

Patent

active

055370500

ABSTRACT:
A process for inspecting an electrode plate having plural electrodes. The process includes the first step of using a rough alignment between the plate to be inspected and the standard inspecting plate so that the two lie on top of each other. One of the plates is then rotated relative to the other by a predetermined small angle. The electrical connection state between the two plates is then determined. A mathematical analysis of the position deviation between the two plates takes place. The analysis is based on the relative positions of the electrode inspected and the corresponding inspecting electrode before and after the rotation.

REFERENCES:
patent: 4929893 (1990-05-01), Sato et al.
patent: 4943767 (1990-07-01), Yokota
patent: 4985676 (1991-01-01), Karasawa
patent: 5274575 (1993-12-01), Abe
patent: 5381104 (1995-01-01), Kimura et al.
Printed Circuit World Convention VI; San Francisco, Ca USA; Yuichi Haruta, et al., "An Economic Analysis of Fixtured and Fixtureless Testing Techniques--A New Testing System for Bare Boards", pp. P5-1 to P5-4 and P5-i, May 11-14, 1993.

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