Glass cloth wiring substrate

Abstract

According to the present invention, variations in characteristic impedance and transmission loss of a signal wiring in a glass cloth wiring substrate can be reduced. There is provided a glass cloth wiring substrate in which signal wirings, plural glass cloth layers, and conductor faces are laminated, and spaces between the signal wirings, the plural glass cloth layers, and the conductor faces are impregnated with resin, wherein the glass cloth layers are formed by weaving bundles of glass fibers in a lattice shape, and the adjacent glass cloth layers are laminated on each other while rotating the warp-weft directions of the glass fibers by a predetermined angle with respect to each other. It is preferable that the rotation angle of the warp-weft directions of the glass fibers of the adjacent glass cloth layers falls within a range from 30 to 60 degrees.

1 . A glass cloth wiring substrate in which signal wirings, a plurality of glass cloth layers, and conductor faces are laminated, and spaces between the signal wirings, the plurality of glass cloth layers, and the conductor faces are impregnated with resin,
 wherein the glass cloth layers are formed by weaving bundles of glass fibers in a lattice shape, and   the adjacent glass cloth layers are laminated on each other while rotating the warp-weft directions of the glass fibers by a predetermined angle with respect to each other.   
   
   
       2 . The glass cloth wiring substrate according to  claim 1 ,
 wherein the glass cloth layers are arranged on both sides of the signal wirings, and are sandwiched by the conductor faces from outside.   
   
   
       3 . The glass cloth wiring substrate according to  claim 1 ,
 wherein the glass cloth layers are arranged on one side of the signal wirings, and the conductor face is arranged on a side opposed to the signal wirings of the glass cloth layers.   
   
   
       4 . The glass cloth wiring substrate according to  claim 1 ,
 wherein the width of each signal wiring is smaller than that of each bundle of the glass fibers configuring the glass cloth layers.   
   
   
       5 . The glass cloth wiring substrate according to  claim 1 ,
 wherein the rotation angle of the warp-weft directions of the glass fibers of the adjacent glass cloth layers falls within a range from 30 to 60 degrees.