Importance

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Abstract

A semiconductor device includes a wiring board, a first semiconductor chip provided on the wiring board upwards, the first semiconductor chip including a first front surface having a connection terminal electrically connected to the wiring board and a second front surface opposite the first front surface, a chip stacked body provided on the wiring board upwards, the chip stacked body including a second semiconductor chip, a sealing insulator configured to cover the first semiconductor chip and the chip stacked body, the sealing insulator containing a resin, and a heat conductor provided between the sealing insulator and the second front surface and including a first region extending in a first direction which is an in-plane direction of the wiring board and a second region extending in a second direction from an end of the first region on a side of the first direction when a direction perpendicular to the in-plane direction of the wiring board and the first direction is defined as the second direction, the heat conductor having heat conductivity higher than heat conductivity of the resin.

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First Claim