CONTINUOUSLY FORMED GLASS FIBER FABRIC FOR PRINTED BOARD

摘要

PURPOSE: To obtain a printed board in which occurrence of measling is suppressed for heat shock by employing a glass fiber fabric of rib weave or diagonal weave, where the tex number of warp and weft is set within a predetermined range, as a basic reinforcing member for a printed board employing continuous forming method. ;CONSTITUTION: A rib weave or diagonal weave glass fiber fabric, having small number of cross points of warps and wefts, is employed in order to reduce insufficient impregnation. Even if a printed board employing such fabric is subjected to heat shock, probability of delamination at the cross point is decreased. The tex number of glass fiber yarn is set in the range of 60-140. In the case of rib weave or diagonal weave, the yarns are shifted every several lines to constitute a fabric and the yarn has higher degree of freedom as compared with plain weave and the degree of freedom is selectable by some extent. A printed board employing such glass fiber fabric is impregnated well with resin thus retarding delamination at the cross point due to heat shock.;COPYRIGHT: (C)1996,JPO