Patent ID: 7488895
Filing Date: 2009-02-10
Classification: H01L,H05K,Y10T

Abstract:
1. A method for manufacturing a component built-in module, comprising the steps of: on one principal surface of a first electrical insulating sheet with at least one cavity formed penetrating therethrough, laminating a second electrical insulating sheet so as to cover at least one cavity, so that a third electrical insulating sheet comprising the first electrical insulating sheet and the second electrical insulating sheet is formed; forming a via hole so as to penetrate through the third electrical insulating sheet; filling the via hole with a conductive resin paste; disposing a first wiring board with a first wiring pattern and electronic components mounted on the first wiring pattern so as to face a principal surface of the third electrical insulating sheet at which the at least one cavity has been formed, and disposing second wiring board with a second wiring pattern so as to be opposed to the first wiring board with respect to the third electrical insulating sheet; stacking the first wiring board, the third electrical insulating sheet and the second wiring board so that the electronic component is built in the cavity and the via hole is disposed between the first wiring pattern and the second wiring pattern; and applying heat and pressure by hot pressing to the stacked first wiring board, third electrical insulating sheet and second wiring board, so that the first wiring pattern and the second wiring pattern are connected electrically through a via conductor made of the conductive resin paste, wherein a first electronic component and at least one second electronic component whose height is taller than that of the first electronic component are mounted so that the first and the at least one second electronic components are placed on the first wiring pattern of the first wiring board, a first cavity and at least one second cavity are formed in the first electrical insulating sheet and at least one third cavity that communicates with the at least one second cavity is formed in the second electrical insulating sheet that covers the first cavity, so that heights of the first cavity and the at least one second cavity combined with the at least one third cavity correspond to the respective heights of the first electronic component and the at least one second electronic component and the first wiring board, the third electrical insulating sheet, and the second wiring board are stacked so that the first electronic component is built in the first cavity and the at least one second electronic component is built in the at least one second cavity combined with the at least one third cavity.