an example embodiment transparent plate 120 is made of glass in a further example embodiment the glass is quartz in another example embodiment the plate is a standard photolithography mask blank 0019 fig3 is a face on view of transparent plate 120 the transparent plate includes an array of fiducials 130 generally the fiducials can be any shape and size as long as they can be detected by an optical vision system in an example embodiment fiducials 130 are formed from an opaque material such as chrome in one example embodiment a fiducial is a single mark or feature in another example embodiment a fiducial is made up of two or more features such as for example a dot 132 and a square 134 as illustrated in fig3 in yet another example embodiment the fiducials have a spacing equal to twice that of the cavity width so that the fiducials can be aligned to the center of each cavity further in an example embodiment the fiducials are formed using the same or similar techniques used to pattern photolithographic masks one such technique utilizes electron beam lithography which can provide highly accurate placement of the fiducials i e to about 1 to 2 microns 3 sigma the fiducials are spaced apart to correspond to desired locations of dies within cavities 70 of panel 50 apparatus 10 further includes an optical vision system 150 arranged adjacent transparent plate lower surface 124 and electrically connected to controller 30 in an example embodiment optical vision system 150 is positioned along an axis a 0 joining the optical vision system with pick up head 20 and moves along with.