| abstract |
The electronic substrate provided by the present invention has a flexible part with an excellent balance of flexibility and hardness. The electronic substrate 10 of the present invention is provided with: a rigid substrate 12, a flexible substrate 14 extending from the end of the rigid substrate 12 and electrically connectable, and wiring from the rigid substrate 12 to the flexible substrate 14; Among them, the flexible substrate 14 is for an electronic substrate 10 having a bend 16 protruding from the end of the rigid substrate 12 and bent toward one of the surfaces of the rigid substrate 12, when reaching the bending part from the end of the rigid substrate 12 16. At the boundary portion between the rigid substrate 12 and the flexible substrate 14, an elastic protective member 18 is provided on at least one of the flexible substrate 14; and the elastic protective member 18 is measured by a nanoindentation test The Martens hardness is 0.35~3.0N/mm 2 , and the tensile elongation at break is more than 100%. |