Flat display panel comprising an envelope including a substrate having terminal-receiving grooves

In a flat display panel including a hermetically sealed envelope and being for use together with an external circuit disposed externally of said envelope for energizing said display panel,

• said display panel comprising a planar substrate formed of an insulating material as a part of said envelope and having an internal surface, a plurality of electrodes inside said envelope, and connection means for connecting said electrodes to said external circuit,
• said connection means comprising a plurality of conductive end pieces fixedly attached to said substrate and connected to predetermined ones of said electrodes, a plurality of elongated terminals conductively attached to said end pieces and extended outwardly of said envelope for connection to said external circuit, and fixing means fixing said terminals to said substrate at predetermined portions of the respective terminals,
• the improvement wherein:
• each of said terminals comprises an internal conductor and a conductive lead;
• and
• said substrate is provided with a plurality of grooves substantially snugly receiving the respective conductive leads and having openings, respectively, on said internal surface, said internal conductors extending on said internal surface from said conductive end pieces into said grooves through the respective openings, said conductive leads including said predetermined portions.