Patent ID: 7560949
Filing Date: 2009-07-14
Classification: G01R,H01L

Abstract:
1. A manufacturing method of a semiconductor device having a semiconductor integrated circuit, comprising the steps of: forming the semiconductor integrated circuit having a driver circuit which transmits a signal to an outside; a receiver circuit which receives a signal from an outside; a pad for output signals coupled to the driver circuit; a pad for input signals coupled to the receiver circuit; a pad for measurement; a first switching element having one end coupled at a junction point of the driver circuit and the pad for output signals, and the other end coupled to the pad for measurement; and a second switching element having one end coupled at a junction point of the receiver circuit and the pad for input signals, and the other end is coupled to the pad for measurement; performing a direct current test which judges good or bad of the semiconductor device based on a voltage in the pad for measurement by making the first switching element into ON state, and making the second switching element into OFF state, or by making the first switching element OFF state, and making the second switching element into ON state; and performing an alternating current test which outputs an alternating current signal to an external circuit via the pad for output signals from the driver circuit by making the first switching element and the second switching element into OFF state, receives the alternating current signal which passed through the external circuit in the receiver circuit via the pad for input signals, and judges good or bad of the semiconductor device based on the alternating current signal which the receiver circuit received.