| 摘要 |
A semiconductor device of the present invention includes a semiconductor elements on a circuit board of the semiconductor device, interposing an adhesive material between the semiconductor element and the circuit board. Further, a connection use circuit board including an external terminal connecting portion is mounted on an upper surface of the semiconductor element, interposing an adhesive material between the connection use circuit board and the semiconductor element, and a lower surface of the connection use circuit board and the upper surface of the circuit board are connected with each other via an electrically conductive terminal. A space between the circuit board and the connection use circuit board is sealed with sealing resin. With this configuration, it is possible to realize a small and thin semiconductor device which allows for (i) less restricted arrangement of an external connection terminal, which connects the semiconductor device with a semiconductor device or an electronic component laminated on an upper stage, and (ii) an improvement in a packaging density, and which is excellent in a heat radiation characteristic.
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