Patent ID: 9500418
Filing Date: 2016-11-22
CPC Classification: B23B,B23K,C01B,C23C,F28F,Y10T

Claim Text:
1. A graphite composite film comprising a graphite film and a metal layer formed on at least one side of the graphite film, wherein the graphite film has a plurality of through holes formed therein, the through holes having a distance between outer diameters of the through holes of 0.6 mm or less, a metal layer is formed also inside the through holes so as to be connected to the metal layer formed on a surface of the graphite film, the metal layer inside the through holes is formed continuously from the one side to an opposite side of the graphite film, a ratio of an area of metal inside the through holes to an area of the graphite composite film is 1.4% or more, so that peeling-off of the metal layer from the graphite film is suppressed, the graphite composite film exhibits grade A, B, or C in an evaluation test of soldering heat resistance, when the graphite composite film is immersed in a solder bath at 260° C. for 10 seconds, and wherein said grade A represents that a distance from an end of delamination between the metal layer and the graphite film is 0.20 mm or less, said grade B represents that a distance from an end of delamination between the metal layer and the graphite film is 0.21 mm to 0.40 mm, and said grade C represents that a distance from an end of delamination between the metal layer and the graphite film is 0.41 mm to 0.60 mm.