Glass woven fabric and laminate for printed wiring board

Abstract

A glass woven fabric composed of glass fiber warp threads and glass fiber weft threads, characterized in that the glass fiber warp threads are woven with the glass fiber weft threads at intervals of at least 10 mm in each of the warp and weft directions and characterized by comprising a glass fiber woven fabric portion having non-woven portions in each of which a warp layer in which only the glass fiber warp threads are successively placed side by side and a weft layer in which only the glass fiber weft threads are successively placed side by side are laminated. When the glass woven fabric of this invention is used, a printed wiring board excellent in dimensional stability and surface smoothness can be provided.

1 . A glass woven fabric composed of glass fiber warp threads and glass fiber weft threads, characterized in that the glass fiber warp threads are woven with the glass fiber weft threads at intervals of at least 10 mm in each of the warp and weft directions, and characterized by comprising a glass fiber woven fabric portion having non-woven portions in each of which a warp layer in which only the glass fiber warp threads are successively placed side by side and a waft layer in which only the glass fiber weft threads are successively placed side by side are laminated.  
     
     
         2 . The glass woven fabric according to  claim 1 , wherein the glass fiber woven fabric portion has at its ends weave texture portions of glass fiber, the weave texture of which is selected from the group consisting of plain weave texture, twill weave texture and satin weave texture.  
     
     
         3 . The glass wove fabric according to  claim 1  wherein continuous weave texture portions having a width of at least 2 mm, the weave texture of which is selected from the group consisting of plain weave texture, twill weave texture and satin weave texture, exist at intervals of at least 10 mm in the warp direction and/or the weft direction between the non-woven portions of the glass fiber woven fabric portion.  
     
     
         4 . The glass woven fabric according to any one of  claims 1  to  3 , wherein the ratio between the glass fiber amounts per 25 mm in the warp and weft directions of the glass woven fabric is 0.7 to 1.4.  
     
     
         5 . A prepreg for a printed wiring board formed by impregnating the glass woven fabric according any one of  claims 1  to  4  with a synthetic resin.  
     
     
         6 . A laminate for a printed wiring board in which the glass woven fabric according to any one of claims  1  to 4 is used as a base material.