METHOD FOR CORRECTING CURL AND IMPROVING DIMENSIONAL STABILITY OF FLEXIBLE METAL FOIL LAMINATED PLATE

摘要

Correcting curl and improving dimensional stability of flexible metal foil laminated plate with an aromatic polyimide thin film bonded directly, without adhesive, to a long metal foil in which the plate is passed under tension. Correction comprises (A) bending the plate over a 1st bar (2) disposed at 30-60 deg. w.r.t the plate width with the metal foil downwards, then (B) over a 1st roller (3) generally parallel to the 2nd bar with the polyimide film downwards, (c) over a 2nd bar (4) disposed at 60-120 deg. w.r.t the 1st bar with the metal foil downwards, and (D) over a 2nd roller (5) generally parallel to the 2nd bar with the polyimide film downwards, and then winding it. The order of stages 1-4 may be altered.