Patent ID: 11189465

Abstract:
The present disclosure provides an adjustable capacitor comprising a ferroelectric dielectric layer, a first electrode and a second electrode disposed on opposite sides of the ferroelectric dielectric layer. The adjustable capacitor further comprises a first control electrode and a second control electrode insulated from the first electrode and the second electrode. The first control electrode and the second control electrode are configured to provide an electric field to the ferroelectric dielectric layer, to adjust a dielectric constant of the ferroelectric dielectric layer by controlling an electric field strength, thereby adjusting the capacitance between the first and the second electrodes. The present disclosure also provides an impedance matching device and a semiconductor processing apparatus. The adjustable capacitor, the impedance matching device and the semiconductor processing apparatus can adjust the capacitance of the adjustable capacitor in milliseconds, thereby accelerating the matching speed, shortening the matching time, and improving the processed result.