| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject tape that is adherable at a relatively low temperature and secure the insulation properties and develop sufficient reliability by providing the adhesive layer with two kinds of polyimides having specific structural units, respectively. SOLUTION: This adhesive tape comprises at least a metal plate, an adhesive layer A and another adhesive layer B. Both of the layers A and B each contains at least one or more kinds of polyimides comprising 100-40mol% of at least one kinds of the structural unit of formula I (Ar is a divalent group bearing an aromatic ring; for example, of formula II) and the structural unit of formula III and 0-60mol% of at least one kinds of the structural unit of formula IV (R is -CH2 OC6 H4 - in which a 1-10C alkylene or methylene bonds to Si; n is an integer of 1-20) and the structural unit of formula V. The above-stated adhesive layers have different glass transition temperatures from each other. In a preferred embodiment, the glass transition temperature of the adhesive layer A is higher than that of the layer B. |
