| 摘要 |
PROBLEM TO BE SOLVED: To provide a partially-multilayered flexible printed wiring board (partial multilayer FPC) in which only necessary parts are multilayered and on which high density surface mounting is possible. SOLUTION: In the partially multilayered flexible printed wiring board, a first double-sided FPC 52 has a double-sided circuit 53 at one end, and a double-sided circuit 55 at the other end and the center is a signal line 54 being a single-sided circuit. A second double-sided FPC 60 is layered on the double-sided circuit 53 at one end by interposing a bonding sheet 2. Inner layer side via holes 16, 24 are formed in the double-sided circuit 53 of the first double-sided FPC 52 and the second double-sided FPC 60 layered by interposing the bonding sheet 2, respectively, thereby having a structure capable of preventing a surface mounting region on the outer layer side from being narrowed. COPYRIGHT: (C)2011,JPO&INPIT |
