Shadow mask having an insulating layer and a process for the production of the same

US6144147A · kind A · utility

Assignee

• Samsung Display Devices Co., Ltd. · KR

Inventors

• Gunter Heine · Capitola, US
• Bernhard Schonert · Berlin, DE
• Peter Neumann · Berlin, DE
• Ulrich Schulke · Berlin, DE
• Albrecht Uhlig · Berlin, DE

Key dates

• Filing date: Dec 15, 1997
• Grant date: Nov 7, 2000
• Expiry date: Dec 15, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01J9/146
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A shadow mask for a color picture tube a thermal includes insulating layer preventing heat transfer to an apertured shadow mask. The side of the mask directed toward the cathode of the color picture tube is coated with a heat-insulating layer including particles having a porous structure. The pores may contain heavy metals or heavy metal compounds so that electron reflection and absorption occurs directly within the layer. The resulting heat is transferred to the interior of the picture tube instead of to the mask.