A modular base for a position sensitive Photo-Multiplier Tube that can be connected to other similar modular bases to form arrays of PS-PMTs. In an example, a method includes forming, in a process tool having a controlled atmosphere, a thin dielectric layer on a surface of a semiconductor substrate of the solar cell. In particular the stent is useful in the ostium regions and at areas of bifurcation in vessels. In the case where rivet, screw or bolt type fixations are used, they are placed at the edge of the plate.