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AssigneeAGC Inc.
InventorsTomoya HOSODA, Tatsuya TERADA, Atsumi YAMABE, Nobutaka KIDERA, Wataru KASAI
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The purpose of the present invention is to provide a fluororesin film or fluororesin laminate excellent in heat resistance and excellent in interlayer adhesion to an object to be laminated, such as a prepreg, a method for producing a hot pressed laminate using said film or laminate, and a method for producing a printed circuit board. The fluororesin film contains a fluororesin having a melting point of from 260 to 380° C., and has an arithmetic average roughness Ra of at least 3.0 nm when inside of 1 μm2 of at least one surface thereof in the thickness direction is measured by an atomic force microscope. The laminate 1 has a layer A10 containing said fluororesin and a layer B12 made of another substrate, wherein the layer A10 has an arithmetic average roughness Ra of at least 3.0 nm when inside of 1 μm2 of a second surface 10b thereof is measured by an atomic force microscope.
A fluororesin film comprising a fluororesin having a melting point of from 260 to 380° C., wherein the arithmetic average roughness Ra when inside of 1 μm2 of at least one surface in the thickness direction is measured by an atomic force microscope, is at least 3.0 nm.
A laminate having a layer A made of a material containing a fluororesin having a melting point of from 260 to 380° C., and a layer B made of a material not containing the fluororesin, of which at least one side is made of a surface of said layer A, wherein
A laminate having a layer A made of a material containing a fluororesin having a melting point of from 260 to 380° C., and a layer B made of a material not containing the fluororesin, wherein
A method for producing a hot pressed laminate, which comprises surface-treating a fluororesin film containing a fluororesin having a melting point of from 260 to 380° C. to obtain a fluororesin film, of which the wetting tension of at least one surface in the thickness direction is at least 30 mN/m, and laminating an object to be laminated, on said surface with a wetting tension of at least 30 mN/m of the obtained fluororesin film by hot pressing at a temperature of at most the melting point of the fluororesin.
Dependencies are inferred from the claim text.