Patent ID: 9468100
Filing Date: 2016-10-11
CPC Classification: H01L,H05K

Claim Text:
1. A multilayer wiring substrate including a substrate body having first and second principal surfaces, and a plurality of wirings disposed inside the substrate body and extending from the first principal surface toward the second principal surface, wherein the first principal surface comprises a first exterior surface of the multilayer wiring substrate and the second principal surface comprises a second exterior surface of the multilayer wiring substrate that is opposite the first exterior surface of the multilayer wiring substrate, the substrate body includes a plurality of stacked insulator layers, the wirings include a plurality of via conductors penetrating through at least one of the insulator layers, and wiring conductors disposed between the insulator layers and connecting the via conductors to each other, and the wiring conductors included in at least one of the wirings have a nonlinear shape, a plurality of outer-peripheral via conductors in one of the insulator layers that is closer to the first principal surface than to the second principal surface, and a plurality of inner-peripheral via conductors in one of the insulator layers that is closer to the first principal surface than to the second principal surface, the inner-peripheral via conductors being disposed in a region surrounded by an outer periphery defined by the outer-peripheral via conductors in one of the insulator layers that is closer to the first principal surface than to the second principal surface, the one of the insulator layers having the first exterior surface, when seeing through the substrate body from a direction perpendicular to the second exterior surface, a region surrounded by the plurality of outer-peripheral via conductors in one of the insulator layers that is closer to the second exterior surface, which are positioned at second exterior surface-side end portions of the plurality of wirings including the plurality of outer-peripheral via conductors in one of the insulator layers that is closer to the first exterior surface than to the second principal surface, has a larger area than a region surrounded by the outer-peripheral via conductors in one of the insulator layers that is closer to the first exterior surface than to the second principal surface, and a plurality of inner-peripheral via conductors in one of the insulator layers that is closer to the second exterior surface than to the first principal surface, which are positioned at the second exterior surface-side end portions of the wirings including the inner-peripheral via conductors in one of the insulator layers that is closer to the first exterior surface than to the second principal surface, are positioned inside the region surrounded by the outer-peripheral via conductors in one of the insulator layers that is closer to the second exterior surface than to the first principal surface.