Patent ID: 8114700
Filing Date: 2012-02-14
Classification: H04R,Y10T

Abstract:
1. A method of fabricating a condenser microphone, comprising the steps of: forming a plurality of condenser microphones, each of the condenser microphones including a semiconductor substrate, a fixed electrode arranged opposite a vibration electrode via a space and a dielectric film arranged between the fixed and vibration electrodes, the fixed electrode and the vibration electrode being disposed on the semiconductor substrate; sticking a sheet on a first surface of the semiconductor substrate, the first surface being opposite to a second surface on which the vibration electrode is formed; disposing the condenser microphone facing a discharge electrode; and performing electretization for fixing charges in the dielectric film by irradiating the dielectric film arranged between the fixed electrode and the vibration electrode provided in a condenser microphone on the semiconductor substrate with ions generated from the discharge electrode in a state that a predetermined potential difference is given between the fixed electrode and the vibration electrode, and wherein the electretization for the dielectric film provided in the plurality of the condenser microphones on the semiconductor substrate is successively performed by relatively moving the semiconductor substrate and the discharge electrode.