CONTINUOUS PRODUCTION METHOD FOR BOTH-SIDED CONDUCTOR POLYIMIDE LAMINATE

摘要

A method of continuously producing a both-sided conductor polyimide laminate free from defective appearance such as longitudinal wrinkles and stable in quality in a rolled state. The method of continuously producing a both-sided conductor polyimide laminate comprises the step of introducing continuously a one-sided conductor laminate having at least three polyimide resin layers, a base layer, an intermediate main layer and a top layer formed on the conductive metal foil (M1), and a base material consisting of a conductive metal foil (M2) into between a pair of heating press rolls, and laminating and integrating the conductive metal foil (M2)to the top layer by heat press bonding, characterized in that the one-sided conductor laminate and the conductive metal foil (M2) before being introduced into between the heating press rolls are respectively heated preliminarily under an inert gas atmosphere to at least 200°C and up to the glass transition point of the polyimide resin in the top layer and then are brought into contact with the surfaces of the heating press rolls.