Wiring substrate, multi-piece wiring substrate array, and manufacturing method therefor

摘要

Provided are a wiring substrate; a multi-piece wiring substrate array; and a method for reliably producing the multi-piece wiring substrate array. The wiring substrate includes a substrate main body, which has first and second main surfaces, side surfaces, a groove surface, and a fracture surface; and a notch which has a concave shape in plan view, and which is provided on a side surface on a side toward the first main surface, wherein, in the side surface having the notch, the boundary between the groove surface and the fracture surface has first curved portions on opposite sides of the notch, the first curved portions being convex toward the first main surface in side view; and also has a second curved portion on a second-main-surface side of the notch, the second curved portion being convex toward the second main surface of the substrate main body in side view.

主权项

1. A wiring substrate comprising:
a substrate main body which is formed of a plurality of stacked ceramic layers, which has a rectangular shape in plan view, which has a pair of opposite first and second main surfaces, and which has side surfaces each being located between the paired main surfaces, and having a groove surface located on a side toward the first main surface and a fracture surface located between the groove surface and the second main surface; and a notch which has a concave shape in plan view, and which is provided on a side surface at least on a side toward the first main surface so as to extend in a thickness direction of the side surface, the wiring substrate being characterized in that: in the side surface having the notch, the boundary between the groove surface and the fracture surface has first curved portions on opposite sides of the notch, the first curved portions being convex toward the first main surface of the substrate main body in side view; and a second curved portion on a second-main-surface side of the notch, the second curved portion being convex toward the second main surface of the substrate main body in side view.