Patent ID: 6411775
Filing Date: 2002-06-25
Classification: C23C

Abstract:
A ceramic flash TV evaporator for the evaporation coating of picture tubes with aluminum, containing a cavity having a triangular cross section and whose width tapers in cross section through the evaporator from an upper edge of the evaporator to a lower edge of the evaporator, wherein two side faces of the triangular cavity have a shape selected from the group consisting of straight, curved convexly, concavely and a combination thereof, wherein the transition of the side walls of the evaporator to the underside of the evaporator is elliptically rounded in cross section at least over part of the longitudinal axis of the evaporator, so that the evaporator is in the form of a divided ellipse in cross section on the underside in the region of the cavity, and a rectangular shape in cross section at ends of the evaporator, wherein the elliptic rounding does not begin directly at the upper edge of the evaporator and begins on the side wall in the region of the ends of the cavity at a smaller distance from the upper edge of the flash TV evaporator than in the region of the center of the cavity.