ENTRY SHEET FOR DRILLING

THERE IS PROVIDED AN ENTRY SHEET FOR DRILLING WHICH IS EXCELLENT IN HOLE REGISTRATION ACCURACY, IS FEWER IN THE WINDING OF A RESIN AROUND A DRILL AND IS THEREFORE CAPABLE OF DECREASING THE BREAKAGE RATE OF A DRILL, MORE PARTICULARLY, AN ENTRY SHEET FOR DRILLING A COPPER-CLAD LAMINATE, FORMED BY STAC...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUYAMA, YOUSUKE, KOMATSU, SHINYA, SUGIMOTO, NORIAKI, AOTO, HIROKI
Format:	Patent
Sprache:	eng
Schlagworte:	CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CUTTING CUTTING-OUT ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY HAND CUTTING TOOLS MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS PERFORATING PERFORMING OPERATIONS PRINTED CIRCUITS PUNCHING SEVERING SEVERING BY MEANS OTHER THAN CUTTING STAMPING-OUT TRANSPORTING
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Beschreibung
Zusammenfassung:	THERE IS PROVIDED AN ENTRY SHEET FOR DRILLING WHICH IS EXCELLENT IN HOLE REGISTRATION ACCURACY, IS FEWER IN THE WINDING OF A RESIN AROUND A DRILL AND IS THEREFORE CAPABLE OF DECREASING THE BREAKAGE RATE OF A DRILL, MORE PARTICULARLY, AN ENTRY SHEET FOR DRILLING A COPPER-CLAD LAMINATE, FORMED BY STACKING A WATER-SOLUBLE RESIN COMPOSITION (B) CONTAINING 100 PARTS BY WEIGHT OF A WATER-SOLUBLE RESIN MIXTURE (A) COMPRISING 80 TO 98 PARTS BY WEIGHT OF A POLYETHYLENE GLYCOL HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF 15,000 TO 35,000 AND 2 TO 20 PARTS BY WEIGHT OF A POLYETHYLENE OXIDE HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF 50,000 TO 200,000 AND 0.1 TO 5 PARTS BY WEIGHT OF AT LEAST ONE WATER-SOLUBLE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF POLYHYDRIC ALCOHOLS, AMINO ACID DERIVATIVE ALCOHOLS, ORGANIC ACIDS AND ORGANIC ACID SALTS, ON AT LEAST ONE SIDE OF A METAL FOIL HAVING A THICKNESS OF 0.05 TO 0.5 MM AND INTEGRATING THE WATER-SOLUBLE RESIN COMPOSITION (B) AND THE METAL FOIL.