Abstract:
A mounting substrate (10) including an interconnection (12) provided on a front surface of a substrate, a lead pad (24) provided separately from the interconnection (12), on the front surface of the substrate (10) and, a lead (20) connected to the lead pad (24) by solder (22), and a connecting portion (28) that connects the interconnection (12) and the lead pad (24) after the lead (20) is connected.