Semiconductor device

摘要

A variable capacitor is formed from a pair of electrodes and a dielectric interposed between the electrodes over a substrate, and an external input is detected by changing capacitance of the variable capacitor by a physical or electrical force. Specifically, a variable capacitor and a sense amplifier are provided over the same substrate, and the sense amplifier reads the change of capacitance of the variable capacitor and transmits a signal in accordance with the input to a control circuit.

主权项

1. A semiconductor device comprising:
a first substrate; a plurality of sensors over the first substrate, each of the plurality of sensors comprising a first electrode; a thin film transistor over the first substrate; an insulating film over the thin film transistor; a pixel electrode over the insulating film, the pixel electrode electrically connected to the thin film transistor; a liquid crystal over the first electrode and the pixel electrode; and a second substrate over the liquid crystal, wherein the plurality of sensors are arranged in two-dimensions, wherein each of the plurality of sensors outputs a capacitance change, wherein each of the first electrode and the pixel electrode comprises a transparent electrode, and wherein the first electrode is electrically connected to a first switch and a second switch.