METHOD FOR MANUFACTURING FLEXIBLE METAL LAMINATE

• Main Authors: SHINO KATSUYA, NAGATA SHOKO, KURITA TOMOHARU, NISHIMOTO AKIRA, AOYAMA TOMOHIRO
• Format: Patent
• Language: English
• Published: 09.08.2012
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CHEMISTRY; COMPOSITIONS BASED THEREON; 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; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PRINTED CIRCUITS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING

PROBLEM TO BE SOLVED: To economically manufacture a flexible metal laminate and a flexible printed board that are superior in flexibility, folding endurance, heat resistance reliability, moisture resistant reliability, absorbency, and dimensional accuracy.SOLUTION: The flexible metal laminate is a flexible metal laminate which comprises a heat resistant resin film having at least one side laminated with a metal foil, wherein the heat resistant resin film is a thermoplastics resin that comprises two layers, and has adhesive strength of ≥4 N/cm after it is treated for 500 hours while being heated at 85°C and humidified at 85%RH using a sample having a circuit pattern created by a subtractive method according to IPC-FC241 (IPC-TM-650, 2. 4. 9(A)), and wherein a heat resistant resin film layer contacting the metal foil side has a Tg of ≥350°C.