Patent ID: 8692132
Filing Date: 2014-04-08
Classification: H01L,H05K,Y10T

Abstract:
1. A multilayered printed circuit board comprising: a semiconductor device; a first resin insulating layer accommodating the semiconductor device, the first resin insulating layer having a first surface and a second surface on an opposite side of the first surface; a second resin insulating layer provided on the first surface of the first resin insulating layer; a first conductor circuit provided on the second resin insulating layer; a second conductor circuit formed on the second surface of the first resin insulating layer and positioned outside the first resin insulating layer; a plurality of via holes electrically connecting the semiconductor device to the first conductor circuit; a third resin insulating layer formed on the second surface of the first resin insulating layer; and a plurality of thermal via formed in the third resin insulating layer, wherein the first resin insulating layer has a recess extending from the first surface to the second surface through the first resin insulating layer, the semiconductor device is accommodated in the recess in the first resin insulating layer, the first resin insulating layer has a metal layer provided on the second surface of the first resin insulating layer and positioned outside the first resin insulating layer such that a portion of the metal layer supports the semiconductor device in the recess, wall surfaces of the recess and side faces of the semiconductor device form a space which is filled with a resin from the second resin insulating layer, and the third resin insulating layer is formed on the metal layer such that the plurality of thermal via is connected to the metal layer.