Semiconductor device

A semiconductor device includes: a semiconductor chip having a main surface; a device region divided in the main surface; a differential amplifier which is formed in the device region and amplifies and outputs an input differential signal; an insulating layer covering the device region on the main surface; and a shield electrode that is disposed on the main surface so as to shield the device region in plan view, and that is fixed at a ground potential. 本发明提供一种半导体器件，其包括：具有主面的半导体芯片；在所述主面中划分出的器件区域；差分放大器，其形成在所述器件区域中，将输入的差分信号放大并输出；在所述主面上覆盖所述器件区域的绝缘层；和屏蔽电极，其在俯视时以遮蔽所述器件区域的方式配置在所述主面之上，并被固定为接地电位。