This paper is a brief overview of joining technologies for the duplex structure of bonding armor to heat sinks in actively cooled plasma facing components. Tore Supra has been facing the challenge of implementing such technology with carbon armor brazed to copper alloy heat sinks for several years. Also, extensive preparations were made for the deployment of the actively cooled limiters with berrylium armor joined to copper alloy heat sinks in the Joint Eurpean Torus. With the development of plasma facing components for the International Thermonuclear Experimental Reactor (ITER), there has been a trend toward fabrication of more sophisticated structures to deal with the challenges of relatively long coponent lifetimes under high thermal loads. The paper summarizes earlier work on Tore Supra and JET as well as current efforts in the US in developing adequate joining technologies for ITER plasma facing components. For ITER, many unique and innovative joining techniques are being considered in the quest to join two candidate armor plate materials (beryllium and tungsten) to a copper base alloy heat sink (CuNiBe, OD copper, CuCrZr). These techniques include brazing and diffusion bonding, compliant layers at the bond interface, and the use of diffusion barrier coatings and diffusion enhancing coatings at the bond interfaces.