Patent ID: 9117770
Filing Date: 2015-08-25
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first base material having a first surface on which a circuit is formed; a second base material having a coefficient of linear expansion different from that of the first base material, being in contact with the first base material, and having a second surface being adjacent to the first surface and facing in a direction identical with a direction in which the first surface faces; and a first interconnect formed over the first and second surfaces to straddle a first borderline between the first and second base materials when viewed in plan, and connected to the circuit formed on the first surface, wherein a cross-sectional area of the first interconnect along the first borderline is greater than a cross-sectional area of at least part of a portion of the first interconnect on the first surface along a width of the first interconnect, or a cross-sectional area of at least part of a portion of the first interconnect on the second surface along the width of the first interconnect.