METHOD FOR PRODUCING PREPREG, PREPREG, METAL CLAD LAMINATE AND PRINTED WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a prepreg which has a slight residual strain. SOLUTION: The method for producing a prepreg comprises an applying process for impregnating a thermosetting resin varnish into a fiber substrate and a drying process for evaporating the solvent of the thermosetting resin varnish impregnated into the fiber substrate to semi curing the resin, wherein the drying process is carried out in a horizontal drying oven inside which gas spouting nozzles are positioned to scatter up and down.