Patent ID: 6521841
Filing Date: 2003-02-18
Classification: G01R,H05K

Abstract:
A test coupon provided in a coupon area defined separately from a wiring board area where multi-layer printed wiring boards are arranged and configured to be used to evaluate characteristics of the multi-layer printed wiring boards which have a tested wiring layer, the test coupon comprising:a multi-layer substrate forming the coupon area and having a longitudinal direction, comprising: at least first and second wiring layers, the first wiring layer being configured to correspond to the tested wiring layer on which a wiring whose characteristics are to be evaluated is provided, the second wiring layer being configured to correspond to another wiring layer of the multi-layer printed wiring boards; first and second through hole groups each provided on opposite ends in the longitudinal direction of the multi-layer substrate and each having a pluraliity of through holes which pass through the multi-layer substrate and which are arranged in the longitudinal direction; a first conductor pattern provided on the first wiring layer and electrically connecting a first through hole of the first through hole group and a second through hole of the second through hole group; and a second conductor pattern provided on the second wiring layer and electrically connecting a third through hole of the first through hole group and a fourth through hole of the second through hole group, the first and second conductor patterns extending substantially along the longitudinal direction, a through hole of the first through hole group being connected to only a through hole of the second through hole group via the conductor pattern.