Patent ID: 9485860
Filing Date: 2016-11-01
CPC Classification: H05K

Claim Text:
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; 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; and the first resin base material portion and the second resin base material portion are joined directly to one another at outermost ends of the multilayer board in the first direction.