METHODS FOR MANUFACTURING LAMINATED PLATE AND HEAT GENERATOR, AND DEFROSTER

Provided is a method for manufacturing a laminate that is excellent in adhesion between a copper foil and a resin film while using a polyvinyl acetal resin having low reactivity with the copper foil. This method includes the steps of providing a copper foil having a treated surface having a developed interfacial area ratio Sdr of 0.50% or more and 9.00% or less and a root mean square height Sq of 0.010 µm or more and 0.200 µm or less on at least one side, and attaching or forming a polyvinyl acetal resin film on the treated surface of the copper foil to form a laminate. The Sdr and Sq are values measured in accordance with ISO 25178 under conditions in which a cutoff wavelength of an S-filter is 0.55 µm, and a cutoff wavelength of an L-filter is 10 µm.