Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Reexamination Certificate
2008-02-27
2010-02-02
Dole, Timothy J (Department: 2831)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
C324S658000
Reexamination Certificate
active
07656166
ABSTRACT:
A multilayer wiring board has a ceramic substrate, on which a multilayer wiring section is formed. The ceramic substrate has an internal conductor layer, which is connected to a test pad. The first conductor layer is formed, and then an electric capacitance is measured between the test pad and a wiring pattern of the first conductor layer. On the other hand, an electrical capacitance is calculated under the normal wiring pattern condition. The measured value is compared to the calculated value to determine whether the wiring pattern is good or bad. Similar measurements and comparisons are carried out for each of the second through fifth conductor layers to determine whether a three-dimensional wiring path is good or bad. As the ceramic substrate has an internal conductor layer, the electric capacitance of the wiring can be measured without an overall grounded layer in the multilayer wiring section, which is a characteristic part different from others among a variety of the multilayer wiring boards.
REFERENCES:
patent: 7091716 (2006-08-01), Nakamura
patent: 7138805 (2006-11-01), Ishioka et al.
patent: 7284311 (2007-10-01), Nakamura
patent: 53-10863 (1978-01-01), None
Related U.S. Appl. No. 12/072,704, filed Feb. 27, 2008, Yoshiyuki Fukami, Multilayer Wiring Board and Method for Testing the same.
Dole Timothy J
Frishauf Holtz Goodman & Chick P.C.
Micronics Japan Co., Ltd.
LandOfFree
Multilayer wiring board and method for testing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multilayer wiring board and method for testing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multilayer wiring board and method for testing the same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4229346