Hight-Tc SQUIDS in MEG are introduced along with some good reasons to develop them: reducing the running cost of MEG (improve energy efficiency), get rid of helium, etc. Then, several steps are described: fabrication, testing and microstructural/electron-transport properties of graphoepitaxial high-Tc films, SQUIDS and Josephson junctions on MgO substrates. Concluding, there is the possibility that this makes the sensors cheaper (if widely used, so massively produced) and contributes to wider use of MEG.