MULTILAYER BOARD

摘要

In a flexible board including laminated resin layers containing the same thermoplastic resin as a principal material, a rigid portion includes a region in which a first resin layer is disposed between a second resin layer defining an upper principal surface and a third resin layer defining a lower principal surface so that the rigid portion has a large thickness, and a flexible portion includes a region in which the first resin layer is not disposed between the second and third resin layers so that the flexible portion has flexibility, a step portion at which a thickness changes is between the rigid and flexible portions, and the second and third resin layers extend in a region from the rigid portion beyond the step portion to the flexible portion.

主权项

1. A multilayer board comprising:
a first resin base material portion; a second resin base material portion; and a third resin base material portion; wherein the first, second and third resin base material portions include a same thermoplastic resin as a principal material and are laminated on each other; wherein the first resin base material portion defines a first principal surface of the multilayer board; the second resin base material portion defines a second principal surface of the multilayer board; the third resin base material portion is provided between the first resin base material portion and the second resin base material portion in a lamination direction of the multilayer board; a step portion at which a thickness of the multilayer board changes is provided between a flexible portion which has flexibility and in which the third resin base material portion is not disposed and a thick portion in which the third resin base material portion is disposed so that the thick portion has a thickness larger than that of the flexible portion; the first resin base material portion and the second resin base material portion extend in a region from the thick portion beyond the step portion to the flexible portion; and the first resin base material portion and the second resin base material portion cover both ends of the third resin base material portion in a first direction in which the first resin base material portion and the second resin base material portion extend in a region from the thick portion beyond the step portion to the flexible portion.