Patent ID: 7799595
Filing Date: 2010-09-21
Classification: G01L

Abstract:
1. A method for manufacturing a semiconductor physical quantity sensor of electrostatic capacitance type, in which mutually facing peripheral bonding areas of an insulating substrate and a semiconductor substrate are contacted for anodic bonding, while both substrates have an anodic bonding voltage applied therebetween so as to be integrated by anodic bonding, with a fixed electrode being formed on a bonding face-side surface of the insulating substrate, and with a movable electrode being formed on a bonding face-side surface of the semiconductor substrate, the method comprising: forming, before the anodic bonding, an equipotential wiring to short-circuit the fixed electrode to the movable electrode on the bonding face-side surface of the insulating substrate inside the bonding area, and to be prevented from being directly sandwiched between the both substrates, in which all of the fixed electrode, the movable electrode, the bonding face-side surfaces of the insulating substrate and the semiconductor substrate, and the equipotential wiring are placed inside the bonding area; performing the anodic bonding; and cutting and removing the equipotential wiring after the anodic bonding in which the equipotential wiring is cut by a laser irradiation allowed to pass through from the insulating substrate.