Automated Green Sheet Editor
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Feb-01
This article describes a machine assembly which includes (1) a laser for line deleting (2) an extrusion tool to repair screened lines (3) a laser inspection head (4) robotic handlers and an X-Y table and (5) a motion controller and microprocessor. In very high density circuit patterns found on multilayer ceramic substrates, pattern modifications cannot be done repeatedly by hand under a microscope. The disclosed machine permits the precise positioning of the pattern under the pattern modification and inspection heads. The thermal conductivity of the circuit lines and pads is sub stantially higher than the substrate material. This differential is important to the precise circuit modification capabilities of the disclosed machine.