from a high gloss 410 stainless steel press plate having an astm d 2457 that had been finished for imparting a 60 degree angle gloss of about 100 to laminate two press plates measuring about twelve inches along each side were cut from this press plate one was coated with about five microns of zirconium diboride in a planar magnetron sputter coating system this press plate was etched under radio frequency conditions for about 15 minutes before the titanium diboride coating was applied a 6 micron zirconium diboride coating was applied in 15 scans applying about 4 000 angstroms of zirconium diboride per scan in a planar magnetron sputter coating system under the following averaged conditions ______________________________________cleaningchemical cleaning wipe with ethanol trichloro ethane and acetonephysical cleaning 5 minute nitrogen gas blow over press plateradio frequency etching conditionsgas medium argonin minute cm minute scan speed 1 2 54 mtorr 10ma sq in ma sq cm 3 5 54 kv 75zirconium diboride coating conditionsgas medium argonin minute cm minute scan speed 1 2 54 mtorr 7ma sq in ma sq cm 56 9 kv 4______________________________________ black laminate has been pressed with press plates measuring six inches by six inches 15 24 cm u00d7 15 24 cm coated with titanium nitride in a magnetron sputter coating system the test results shown on table 3 are the average results of pressing five sheets of laminate with each press.