Mounting substrate and structure having semiconductor element mounted on substrate

Abstract

A mounting substrate on which a semiconductor element is to be mounted by flip-chip bonding, the semiconductor element having a surface on which a plurality of electrode terminals are arranged in a line, each of said electrode terminals having a protruded electrode formed thereon, wherein the surface of the mounting substrate on which the semiconductor element is to be mounted is provided with a protective film having an opening corresponding to an area of the semiconductor element where the protruded electrodes are located, a plurality of connection electrodes being arranged in the opening, the connection electrodes being provided with a solder for bonding it to the protruded electrodes, and being arranged at the same interval as that of the protruded electrodes, and each of the connection electrodes being connected to a wiring pattern of the mounting substrate, and wherein the length of a portion of the connection electrode from the center of the opening to the end thereof that is not connected with the wiring pattern is 150 &mgr;m or larger. A structure having a semiconductor element mounted on the substrate is also disclosed.