| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a flexible printed wiring board of simple structure having a shield, in which the cross sectional area of a signal line can be ensured even when impedance matching is performed while attaining a high shield performance. <P>SOLUTION: A reinforcement insulation layer 4 is located in contact with a cover insulation layer 2, and a shield layer 5 covers the reinforcement insulation layer. The reinforcement insulation layer 4 is located in a region smaller than the cover insulation layer geometrically (1), includes a punched part morphologically (2), and is porous in material (3). Average density of the reinforcement insulation layer in a region where the signal line is located in the plan view is higher than or equal to that in a region where the signal line is not located. <P>COPYRIGHT: (C)2013,JPO&INPIT |
