Production method of high-density radiating fins
A production method and technology of compactness, applied in cooling/ventilation/heating transformation, modification by conduction heat transfer, roller pressing, etc., can solve the problems of uneven heat dissipation, overheating of tape, poor reliability performance, etc., and achieve improved flatness. properties and flexibility, improve biaxial tensile properties, and avoid local overheating effects
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[0024] Embodiment: a kind of production method of high-density heat sink, described graphite heat sink is obtained through the following steps:
[0025] Step 1, coating the graphite modifier respectively on the upper and lower surfaces of the polyimide film to obtain the treated polyimide film, the treated polyimide film is composed of the polyimide film, the first coating layer and the second coating layer composition;
[0026] Described graphite modifier is made up of the component of following parts by weight:
[0027] 22 parts of benzophenone tetraacid dianhydride,
[0028] 15 parts of pyromellitic dianhydride,
[0029] 20 parts of diaminodiphenylmethane,
[0030] 21 parts of dimethylformamide,
[0031] 8.5 parts of N-methylpyrrolidone,
[0032] 2.2 parts of ethylene glycol,
[0033] 2.4 parts of polydimethylsiloxane,
[0034] 0.8 parts of dibutyl phthalate;
[0035] Step 2. Under the protection of an inert gas, the treated polyimide film is raised from room temper...
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