High Resolution Shadow Mask Patterning In Deep Holes And Its Application To An Electrical Wafer Feed-through

Abstract
This paper presents a technique to pattern materials in deep holes and/or on non-planar substrate surfaces. A rather old technique, E-beam evaporation of metals through a shadow mask, is used [1]. The realisation of high resolution shadow masks using micromachining techniques is described. Further, a low ohmic electrical wafer feed through with a small parasitic capacitance to the substrate and a high placing density is presented.