Patent ID: 7696442
Filing Date: 2010-04-13
Classification: H01L,H05K,Y10T

Abstract:
1. A wiring board comprising: a core board including a core body and a ceramic sub-core which is accommodated in a sub-core accommodation space that is a through-hole that communicates with first and second major surfaces of the core body or a recess having an opening in a first major surface of the core body; and first and second wiring laminates each formed by resin insulating layers and conductor layers laminated on the first and second major surfaces of the core board, respectively, wherein: said first wiring laminate includes a lowest resin insulating layer and an overlying resin insulating layer overlying said lowest resin insulating layer; a groove-filling portion which fills a gap between the core body and the ceramic sub-core is integral with the lowest resin insulating layer of the first wiring laminate, the lowest resin layer is provided on the gap between the core body and the ceramic sub-core and on the ceramic sub-core, the lowest resin insulating layer is present between an upper surface of the ceramic sub-core and the overlying resin insulating layer of the first wiring laminate, and the lowest resin insulating layer is in contact with the upper surface of the ceramic sub-core; and via conductors that are connected to respective conductor patterns formed on a first major surface of the ceramic sub-core penetrate through the lowest resin insulating layer.