Ladas & Parry LLP
Polyimide dry film and application thereof
A polyimide dry film including a carrier and a polyimide layer and a method of using the same are provided. The polyimide layer contains (a) a polyimide precursor or soluble polyimide and (b) a solvent. The solvent includes a hydrophilic solvent and a hydrophobic solvent and a weight ratio of the hydrophilic solvent to the hydrophobic solvent is in the range of about 0.05 to about 2. The polyimide dry film of the present invention has water absorbability, is relatively stable even in the presence of water, and has a non-sticky surface. The resulting polyimide has excellent physical properties and can be used in a process in which water or an aqueous solution is involved to form a coverlay with excellent physical properties.
ETERNAL MATERIALS CO., LTD.
H B B C C B C B C H B H H C B
H05K B32B B32B C09D C08G B32B C08J B32B C08G H05K B32B H05K H05K C08J B32B
inventional inventional additional inventional inventional additional additional additional inventional inventional additional additional additional inventional additional
Chih-Min Chung-Kai Chung-Jen Po-Yu Shun-Jen Chang-Hong Meng-Yen
An Cheng Wu Huang Chiang Ho Chou