MANUFACTURE OF METAL PLATED LAMINATED SHEET WHOSE BOTH SIDES ARE FLEXIBLE

• Main Authors: NOMURA HIROSHI, NAGAO KOICHI, KATO MATSUO, SATO EIKICHI, KAWAMATA KOICHI, IMAIZUMI JUNICHI
• Format: Patent
• Language: English
• Published: 30.06.1989
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; 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; TRANSPORTING

PURPOSE:To obtain a metal plated laminated sheet whose heat resistance, chemical resistance, nonflammability, electrical characteristics and adhesion are excellent and both sides are flexible, by a method wherein a metallic foil or a polyimide layer of a one side coated laminated sheet are laminated to the similar polyimide layer of the one side coated laminated sheet obtained by applying polyimide or polyamide acid solution directly to the metallic foil by heating and pressurizing the same. CONSTITUTION:After removal of a solvent by applying polyimide or polyamide acid varnish directly to a metallic foil, a metal plated laminated layer sheet whose direct coated one side is flexible is obtained by completing imidizing reaction. Then when thermocompression bonding of the metallic foil to a polyimide layer side of the metal plated laminated layer sheet whose direct coated one side is flexible is performed or the thermocompression bonding of the polyimide layers of the metal plated sheets whose direct coated one side is flexible are performed by making them inside, the metal plated laminated sheet, which are superior in characteristics and free from an adhesive agent layer and possesses flexible both sides, is obtained. At the time of lamination, it is performed at a temperature of the secondary transition point or higher of the polyimide corresponding to a rubbery condition of the polyimide and its pressure of 10-100kg/cm is preferable which is preferable further when the pressure is 20-70kg/cm .