Systems and methods to pattern surfaces to create regions of variable adhesive force on a superhydrophobic paper surface. A digital pathology system creates, assesses and improves the quality of a digital slide. It is converted to a read only memory cell by severing a connection between at least one of said transistors within a first of said two inverters and one of said voltage supply lines such that when powered said first inverter outputs a predetermined value. A die is attached to the spacer, and a lower portion of the first die extends into the recess. An imaging condition such as a focus, etc. The heat sink includes a thermal conductive sheet and a set of cooling fins mounted on a rear side of the thermal conductive sheet.