Patent ID: 6504222
Filing Date: 2003-01-07
Classification: B82Y,H01L

Abstract:
A multi-quantum well infrared photo-detector, in which a plurality of multi-quantum well layers having respective sensitivities for different wavelength ranges of infrared are layered via a common contact layer, comprising:a switch where one end is connected to said common contact layer; and a current integration unit which is connected to the other end of said switch; wherein first and second voltages are applied to first and second contact layers at the opposite side of first and second multi-quantum well layers which are formed on and under said common contact layer respectively; said switch is conducted for a predetermined time so that either voltage between said common contact layer and the first contact layer or voltage between said common contact layer and the second contact layer becomes higher than the other; and said current integration unit is charged or discharged by the current which flows in said multi-quantum well layers.