PURPOSE: To obtain a laminate having little warpage by a method wherein in a process in which during transport a plurality of substrates impregnated with curable resin liquid are laminated, coated with a metal foil on one surface thereof, and cured, the laminate cured to a certain extent is curved so that the metal foil surface is concaved and, thereafter, further cured.
CONSTITUTION: A plurality of sheet substrates 2, such as paper or glass cloth, are continuously transported to be impregnated with resin liquid in a resin liquid infiltrating chamber 4. Thereafter, the substrates 2 are combined between a pair of squeezing rolls 5. A metal foil 8 coated with an adhesive is laminated on the top surface of the laminate. A carrier sheet 10, such as a polyester film, is laminated on the rear surface of the laminate. The uncured laminate is fed into a curing furnace. At this time, after the laminate is cured to a degree of at least 60% in a transport path from the inlet of the furnace 12 to the outlet thereof, the laminate is curved in the width direction reversely to an intrinsic warping direction by a curving device consisting of pressing rolls 20 and support rolls 22 on the opposite side so that the metal foil surface is concaved, thereafter being further cured.
KIKUKAWA TSUKASA
SHIMOMURA MASAYOSHI
