This paper describes a new philosophy for realising terahertz MCMs, that can operate within the frequency range of approximately 75 to 300 GHz, which are not only manufacturable but can also provide state-of-the-art performance. To this end a consortium of four leading UK universities has recently been formed to demonstrate this T-MCM technology. Some of the techniques that will be under investigation within this ambitious three-year research programme are presented here. The ultimate goal is to provide industry with a technology that will allow them, for the first time, to realise complete terahertz sub-systems without the need for bulky and expensive superconducting and machined waveguide components.