Patent ID: 6403990
Filing Date: 2002-06-11
Classification: H01L

Abstract:
A photoconductive switch, comprising:a first confinement layer of a first semiconductor material having a first band-gap energy and a first conductivity type; a second confinement layer of a second semiconductor material having a second band-gap energy; a photoconductive layer of a third semiconductor material having a third band-gap energy and a second conductivity type, opposite to the first conductivity type, the photoconductive layer being sandwiched between the first confinement layer and the second confinement layer, the third band-gap energy being less than the first and second band-gap energies, the photoconductive layer including: a doped sub-layer in contact with the first confinement layer, and an undoped sub-layer adjacent the second confinement layer; and a first electrode and a second electrode separated from each other by a gap, and located on a surface of the first confinement layer remote from the photoconductive layer.