TRACE TYPE CIRCUIT BOARD INSPECTION DEVICE

PROBLEM TO BE SOLVED: To provide a trace type circuit board inspection device capable of preventing unsymmetric wearing of electrodes. SOLUTION: When a contact I and a contact N are set on and other contacts are set off, the current from a constant-current source 31 will flow through the contact I,...

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Bibliographic Details
Main Authors FURUMI TADASHI, HIKI TATSUYA, SHIMIZU TOMOHISA, KOBAYASHI MITSUAKI
Format Patent
LanguageEnglish
Published 06.03.2008
Subjects
CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
FREQUENCY-CHANGING
MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
PRINTED CIRCUITS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
TESTING
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Summary:PROBLEM TO BE SOLVED: To provide a trace type circuit board inspection device capable of preventing unsymmetric wearing of electrodes. SOLUTION: When a contact I and a contact N are set on and other contacts are set off, the current from a constant-current source 31 will flow through the contact I, a needle 11, a circuit pattern 51, a needle 13, and the contact N, and the polarity of the needle 11 is positive, while the polarity of the needle 13 is set negative. A voltage measuring instrument 36 measures the voltage between the needle 11 and the needle 13, and a determination device 4 determines normality or abnormality. When a contact M and a contact J are set on and other contacts are set off, the current from the constant-current source 31 will flow through the contact M, the needle 13, the circuit pattern 51, the needle 11, and the contact J, and the polarity of the needle 13 is positive, while the polarity of the needle 11 is set negative. Change in polarity to a switch matrix 2 is performed by a command from a controller 5, in response to the instructions or other commands from an operator. COPYRIGHT: (C)2008,JPO&INPIT
Bibliography:Application Number: JP20060230020