Patent ID: 6734692
Filing Date: 2004-05-11
Classification: G01R

Abstract:
An inspection apparatus for inspecting a conductive pattern of a circuit board, in which a potential variation caused by applying an inspection signal to said conductive pattern is detected in a non-contact manner, said inspection apparatus comprising:detect means for detecting the potential variation in each portion of said conductive pattern by use of a plurality of sensor elements; and select means for outputting a select signal for selecting said sensor elements, wherein each of said sensor elements is formed either on a single-crystal of a semiconductor or on a flat plate, and each of said sensor elements includes; a passive element operable as a counter electrode coupled capacitively with said conductive pattern to detect the potential variation in said conductive pattern, and a transistor adapted to output a detect signal in response to said select signal which is input into said transistor, said detect signal being output from said passive element.