Ge:Ga far-infrared photoconductor two-dimensional (2D) direct hybrid arrays are being developed for application in the focal-plane detectors of the Far Infrared Surveyor (FIS), one of the two main instruments of the Infrared Imaging Surveyor (IRIS) satellite. The arrays are composed of Ge:Ga photoconductor arrays fabricated on one chip, Si-pMOS readout integrated circuits, and a hybridization of them done by using indium bump technology.