Patent ID: 8698574
Filing Date: 2014-04-15
Classification: H01L,H03K

Abstract:
1. A high frequency switch comprising: a high frequency switch IC chip having a high-frequency switching circuit section including an input terminal, a plurality of switching elements, a plurality of high-frequency signal lines, and a plurality of output terminals, each of the plurality of high-frequency signal lines connecting the input terminal and each of the plurality of output terminals via each of the plurality of switching elements, each of the plurality of output terminals being arranged on a surface at an outer periphery of the high-frequency switch IC chip, the input terminal being arranged on the surface of the high-frequency switch IC chip in a region of the high-frequency switch IC circuit section to make a length of each of the plurality of high-frequency signal lines substantially the same; and a wiring substrate including a first wiring layer, a second wiring layer, and a third wiring layer arranged in an order of the first wiring layer, the second wiring layer, and the third wiring layer, the surface of the high-frequency switch IC chip being arranged to face the first wiring layer, the first wiring layer including a ground wiring, a plurality of output terminal wirings, and an input terminal wiring connected to the input terminal, each of the plurality of output terminal wirings being connected to each of the plurality of output terminals, the second wiring layer including a first ground layer having a planar region including the high-frequency switch IC chip inside the planar region as viewed from the high-frequency switch IC chip toward the first ground layer, the third wiring layer including an input signal wiring separated from the high-frequency switch IC chip , the first ground layer being interposed between the input signal wiring and the high-frequency switch IC chip, and the wiring substrate including a conductor via, the conductor via being electrically connected to the input terminal wiring at one end and being electrically connected to the input signal wiring at one other end.