Patent ID: 9433097
Filing Date: 2016-08-30
CPC Classification: H01L,H05K

Claim Text:
1. A circuit substrate, comprising: a core substrate having a cavity; a plurality of metal blocks accommodated in the cavity of the core substrate; a first build-up layer comprising an insulating resin layer and laminated on a first side of the core substrate such that the insulating resin layer is covering the cavity of the core substrate; a second build-up layer comprising an insulating resin layer and laminated on a second side of the core substrate such that the insulating resin layer is covering the cavity of the core substrate; and a filling resin filling a gap formed between the cavity and the metal blocks positioned in the cavity of the core substrate, wherein the cavity of the core substrate is penetrating through the core substrate, the core substrate has an intracavity projection structure projecting from at least one side surface of the cavity such that the intracavity projection structure is positioned between the metal blocks and separating the metal blocks from contacting each other in the cavity of the core substrate, the first build-up layer has a plurality of first conductors connected to the plurality of metal blocks, respectively, such that each of the first conductors conducts one of electricity and heat, and the second build-up layer has a plurality of second conductors connected to the plurality of metal blocks, respectively, such that each of the second conductors conducts one of electricity and heat.