Patent ID: 8309860
Filing Date: 2012-11-13
Classification: H01L,H05K,Y10T

Abstract:
1. An electronic component built-in substrate, comprising: a wiring substrate having a wiring layer; an electronic component mounted on the wiring substrate in a state that a connection pad is directed upward; an insulating layer formed on the wiring substrate and in which the electronic component is embedded up to a side surface upper portion thereof such that a whole of an upper surface of the electronic component is exposed from the insulating layer; and an upper wiring layer including an in-chip wiring part which is connected to the connection pad and contacts an upper surface of the electronic component and is constructed by an underlying metal pattern layer and a conductive pattern layer formed thereon, and an extended wiring part which is connected to the in-chip wiring part to extend onto the insulating layer and is formed by an identical layer with the conductive pattern layer wherein the underlying metal pattern layer is formed from an upper area of the connection pad to an edge of the electronic component, and the extended wiring part includes no said underlying metal pattern layer.