Continuous production method for both-sided conductor polyimide laminate

• Main Author: MIYAMOTO KAZUYA,TOKUMITSU AKIRA,II MASAKAZU,SHIGEMATSU YOSHIHIRO,HIGASAYAMA ICHIRO,KANNO MASAHIRO,NAKAGAWA YUJIRO
• Format: Patent
• Language: English
• Published: 31.01.2007
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PERFORMING OPERATIONS; PRINTED CIRCUITS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

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.