U.S. Philips Corporation

Joseph C Bosman

Gerardus N Van Veen

Remko Horne

Jacobus M Dings

Theunis S Baller

Sybrandus Van Heusden

Henricus J Ligthart

Franciscus C De Haas

Harm Tolner

Cornelis G De Haas

Method of providing a pattern of apertures and/or cavities in a plate of material which is suitable for powder blasting, or of cutting pieces from a plate (2) of such a material by means of powder blasting, using a non-metal layer of blast-resistant material (3) as a mask which is patterned while or after it is fixedly provided on the surface of the plate.

Powder-blasting method

A method of printing a pattern on plates for flat display devices, in which method, in succession, a raised pattern is provided, which is then subjected to a printing process by means of an unpatterned screen-printing screen. For example, a pattern of phosphor dots or electrodes can be provided in this manner. It is also possible to make partitions, which form channels or cells on a plate for a plasma display device or PALC display device.

Method of printing a pattern on plates for a flat display device

After a plate or layer of non-metallic, particularly hard and brittle material has been provided with a (metal) mask having a plurality of apertures arranged in a pattern, it is exposed to at least one jet of abrasive powder particles, which jet is moved relative to the plate. The mask has its surface facing the surface on which the jet impinges secured to the plate or layer of non-metallic material by means of a layer of adhesive material having a thickness which is smaller than the size of the abrasive powder particles.

Method of providing a pattern of apertures and/or cavities in a plate or

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Eindhoven, Netherlands

Joseph C Bosman