| 摘要 |
<P>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. <P>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. <P>COPYRIGHT: (C)2012,JPO&INPIT |
