| abstract |
An electronic substrate having a flexible portion having an excellent balance between flexibility and hardness is provided. A rigid substrate (12), a flexible substrate (14) extending from an end of the rigid substrate (12) and connected so as to be conductive, and wiring from the rigid substrate (12) to the flexible substrate (14) In the electronic substrate 10 having a bent portion 16 protruding from the end of the rigid substrate 12 and bent toward one side of the rigid substrate 12 in the flexible substrate 14 , an elastic protective member on at least one surface of the flexible substrate 14 at the boundary between the rigid substrate 12 and the flexible substrate 14 from the end of the rigid substrate 12 to the bent portion 16 . (18) is installed, the Martens hardness measured by the nanoindentation test of the elastic protective member 18 is 0.35 to 3.0 N/mm 2 , and the tensile elongation at break is 100% or more ( 10) was made. |