Industrial Technology Research Institute

Si-Yi Chin

Shur-Fen Liu

Jinn-Shing King

Shou-Jui Hsiang

Wei-Ta Yang

Charng-Shing Lu

Disclosed is a method of fabricating a graphite sheet, including: polymerizing diamines and a dianhydride to form a polyamic acid. The polyamic acid is solvent casted on a substrate and hot baked to form a polyamic acid film or gel film. The polyamic acid film or gel film is biaxially stretched at a high temperature imidization or chemical imidization to form the polyimide film. The polyimide film is then carbonized and graphitized to form a graphite sheet. The diamines include a diamine of Formula 1 and a diamine of Formula 2, and the dianhydride includes a dianhydride of Formulae 3, Formula 4, Formula 5, Formula 6, Formula 7, Formula 8, Formula 9, or combinations thereof. 

Polyamic acid, polyimide, and method for manufacturing graphite sheet

The disclosure provides a polyimide film laminate and a metal clad laminate employing the same. The polyimide film laminate includes a first polyimide film, a second polyimide film disposed on the first polyimide film, and a third polyimide film disposed on the second polyimide film. Particularly, the first polyimide film has a thermal conductivity of between about 0.2-0.9 watts/m&#xb7;K and a breakdown voltage greater than about 3KV, the second polyimide film has a thermal conductivity of more than about 1 watts/m&#xb7;K, and the third polyimide film has a thermal conductivity of between about 0.2-0.9 watts/m&#xb7;K and a breakdown voltage greater than about 3KV.

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Hsinchu, Taiwan

Si-Yi Chin