Patent ID: 8580066
Filing Date: 2013-11-12
Classification: H01L,H05K,Y10T

Abstract:
1. A method for manufacturing a multilayer wiring substrate having a plurality of resin insulation layers and a plurality of conductor layers laminated alternately in multilayer arrangement on a core upper surface and a core lower surface of an insulation core, the method comprising the steps of: providing the insulation core, the insulation core comprising an insulation material that is more rigid than a material of the resin insulation layers; a through hole formation step of forming a through hole that extends through the core upper surface and the core lower surface; providing a substrate that is plate-like; a first buildup step of laminating at least one resin insulation layers and at least one conductor layer on the substrate to form a first buildup layer; a core lamination step, occurring after the through hole formation step, of laminating at least one resin insulation layer and at least one conductor layer on the core lower surface to form a second buildup layer, and of laminating at least one resin insulation layer and at least one conductor layer on the core upper surface to form a third buildup layer; a core bonding step of bonding the third buildup layer on the insulation core to the first buildup layer after the core lamination step and the first buildup step; a second buildup step of laminating at least one resin insulation layer and at least one conductor layer on the second buildup layer to form a fourth buildup layer after the core bonding step; and removing the substrate from the first buildup layer to separate the substrate from the first buildup layer, the second buildup layer, the third buildup layer, the fourth buildup layer, and the insulation core after the second buildup step.