Electronic circuit board and ultrasonic bonding method

Abstract

A PCB (1) has a reinforcing member (12) composed of a material having a higher melting point than a synthetic resin constituting a substrate (10). A first reinforcing member (121) constituting the reinforcing member (12) is composed of a substantially tabular or belt-shaped metal buried in the substrate (10), the metal being at least partially overlapped with an upper surface wire (11). A second reinforcing member (122) constituting the reinforcing member (12) is composed of a substantially columnar metal which is connected to the lower surface of the upper surface wire (11) and physically, chemically or mechanically connected to the first reinforcing member (121), and which vertically extends, in the same manner as a via (111).

Dependencies are inferred from the claim text.