Printed Wiring Board

Abstract

The printed wiring board in accordance with the present invention is comprised of a substrate, an electrically conductive pattern formed on the substrate to define a circuit wire and a pad electrically connected to the circuit wire, and an electrical insulator covering the substrate and the electrically conductive pattern therewith. A region of the electrically conductive pattern exposed through an opening formed throughout the electrical insulator is used as the pad. The opening has opposite ends extending in a first direction beyond the electrically conductive pattern such that opposite ends of the pad in the first direction are defined by the electrically conductive pattern, and the opening further has opposite ends extending in a second direction perpendicular to the first direction to intersect with the electrically conductive pattern such that the pad is defined in shape in the second direction by the opposite ends of the opening extending in the second direction.

1 . A printed wiring board comprising:
 a substrate;   an electrically conductive pattern formed on said substrate; and   an electrical insulator covering said substrate and said electrically conductive pattern therewith,   wherein a region of said electrically conductive pattern exposed through an opening formed throughout said electrical insulator is used as a pad, and a region except said pad is used as a circuit wire,   characterized in that   said opening is formed so as to separately expose said electrically conductive pattern,   said opening has opposite ends extending in a first direction beyond said electrically conductive pattern such that opposite ends of said pad in said first direction are defined by said electrically conductive pattern,   said opening further has opposite ends extending in a second direction perpendicular to said first direction to intersect with said electrically conductive pattern such that said pad is defined in shape in said second direction by said opposite ends of said opening extending in said second direction, and   said pad is smaller in length in said first direction than said circuit wire,   said pad is comprised of a plurality of pads arranged in said second direction,   said circuit wire is comprised of a plurality of circuit wires spaced away from one another in said first direction and extending in said second direction, and   at least one of said circuit wires is bending by having a component directed toward said first direction, and is electrically connected to said pad at a side thereof extending in said second direction.   
   
   
       2 . The printed wiring board as set forth in  claim 1 , wherein said pad is comprised of a plurality of pads arranged in said first and second directions, and
 said circuit wire is arranged for each of pad rows arranged in said second direction.   
   
   
       3 . The printed wiring board as set forth in any one of  claims 1  to  2 , wherein said electrically conductive pattern has opposite ends in said second direction, said opening is spaced away from said opposite ends of said electrically conductive pattern, and said circuit wire is electrically connected to said pad at a side thereof extending in said second direction.