Patent ID: 6422920
Filing Date: 2002-07-23
Classification: B24C

Abstract:
A method of obtaining a pattern of concave spaces or apertures in a plate or layer of a brittle-like material, in which method a jet of abrasive powder particles from a nozzle is directed onto a surface of the plate or layer, which plate or layer is provided with a mask so as to define the region of impact of the abrasive powder particles on the surface, characterized in that at least two jets of abrasive powder particles are each directed at respective angles of &agr;1 and &agr;2 onto the surface of the plate or layer, which jets mutually extend at an angle of (180Â°-&agr;1-&agr;2), the shape of the concave spaces or apertures thus formed being not limited by the thickness of the brittle-like material.