Showing papers on "Layer (object-oriented design) published in 1971"

Device for producing a photo-varnish mask

Abstract: A device for producing a photo-varnish mask with a plurality of equal, mutually displaced structures, where a photo-varnish layer, attached to a plate or disc-shaped carrier, is gradually locally illuminated by projection at individual discrete places, for the purpose of producing one structure, and following all illuminating processes is developed and processed into a photovarnish mask. A table provided with a defined attachment for the carrier of the photo-varnish layer is mechanically coupled with a second table and displaceable upon the latter in two coordinate directions. Mechanical gears are provided to adjust the position of the second table with respect to the stationary surrounding or reference plane. A gearless fine adjustment is provided between the first table and the second table which works continuously to adjust the position of the first table with respect to the second table. A mark, which is stationary at least with respect to both tables, is provided to aid in adjusting the exact position of the first table in the horizontal plane, by optical interferences, and particularly laser interferences.