POLYIMIDE DRY FILM AND APPLICATION THEREOF
    8.
    发明申请

    公开(公告)号:US20180002567A1

    公开(公告)日:2018-01-04

    申请号:US15636993

    申请日:2017-06-29

    摘要: 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.