| 摘要 |
PROBLEM TO BE SOLVED: To provide a double-sided metal clad laminated sheet with high heat resistance, which suppresses microvoids generated between a metal layer and a polyimide resin layer, and suppresses circuit separation due to permeation of acid cleaning solution by improving adhesive reliability between the metal layer and the polyimide resin layer.SOLUTION: In a double-sided metal clad laminated sheet, a laminated structure is formed, which includes: a first polyimide resin layer with a linear humidity expansion coefficient of ≤20×10/%RH; and a second polyimide resin layer with a glass transition temperature of ≥300°C, and less than that of the first polyimide resin layer. Preferably, the metal layers on both sides may be bonded to the polyimide resin layer by a coating method. |
