SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE

The invention provides a semiconductor device low in height and having low heat resistance, and a method of manufacturing the semiconductor device. Disclosed is a semiconductor device including: a support plate 1; a semiconductor chip 2 mounted on one principal surface of the support plate 1 via an adhesive layer, with the element circuit surface of the chip being directed upward; an insulation material layer 4 that seals the semiconductor chip 2 and the periphery of the semiconductor chip; openings formed on an electrode arranged on the element circuit surface of the semiconductor chip 2 in the insulation material layer 4; conductive portions 6 formed in the openings so as to be connected to the electrode of the semiconductor chip; a wiring layer 5 formed on the insulation material layer 4 so as to be connected to the conductive portions 6 and partially extending to the peripheral region of the semiconductor chip 2; and external electrodes 7 formed on the wiring layer 5, wherein the support plate 1 is a flat plate that constitutes the outermost layer of a combined support plate and is separated from the combined support plate in which a plurality of flat plates used in the process of manufacturing the semiconductor device is laminated to each other.