Patent ID: 8624125
Filing Date: 2014-01-07
Classification: B32B,H05K,Y10T

Abstract:
1. A laminate comprising an adhesive organic material layer and a sol imide resin substrate wherein the adhesive organic material layer is laminated on a surface of the polyimide resin substrate which is exposed by removing at least a portion of a metal foil of a metal foil laminated polyimide resin substrate wherein the metal foil is directly laminated on the polyimide resin substrate; and the surface of the metal foil to be bonded to the polyimide resin substrate has: a surface roughness (Rzjis) of 3.0 μm or less; a surface area ratio (B) of 1.25 to 2.50, in which the surface area ratio (B) is calculated as a ratio [A/6550] of a surface area of a two-dimensional region with a surface area of 6550 μm a chromium content per unit area of the two-dimensional region of 2.0 mg/m