Abstract: A bi-layer bump comprises a base layer composed of sprayed aluminum thick film having a thickness of about 20 .mu.m formed to cover the periphery of the passivation film formed on each pad electrode, a surface layer composed of sprayed copper thick film having a thickness of about 30 .mu.m formed on the base layer. According to the above-mentioned structure, a substrate on which bumps are formed which has an excellent electric property and connecting reliability, wherein an interlayer insulating layer, an active layer and a multi-layer wiring can be provided under the pad electrode can be obtained.

Abstract: A bi-layer bump comprises a base layer composed of sprayed aluminum thick film having a thickness of about 20 .mu.m formed to cover the periphery of the passivation film formed on each pad electrode, a surface layer composed of sprayed copper thick film having a thickness of about 30 .mu.m formed on the base layer. According to the above-mentioned structure, a substrate on which bumps are formed which has an excellent electric property and connecting reliability, wherein an interlayer insulating layer, an active layer and a multi-layer wiring can be provided under the pad electrode can be obtained.

Abstract: A DC gas discharge type image display device includes a front glass substrate; a rear glass substrate facing the front glass substrate, interposing a discharge gas therebetween; a set of anodes including a plurality of line electrodes formed on the rear glass substrate; a set of cathodes including a plurality of line electrodes placed on the front glass substrate so as to perpendicularly cross the set of anodes; and a plurality of discharge cells, each being provided so as to correspond to each of the cross points of the set of anodes and the set of cathodes. The device is driven in a refresh driving method or a memory driving method. As to the production of this device, the set of cathodes is formed by a spraying method. The cathodes are made from aluminum, nickel, an aluminum alloy or a nickel alloy. The discharge gas is a mixed gas of He and Xe.

Abstract: In a DC gas discharge type image display apparatus including: a front glass substrate; a rear glass substrate facing the front glass substrate, interposing a discharge gas therebetween; a set of anodes including a plurality of line electrodes formed on the rear glass substrate; a set of cathodes including a plurality of line electrodes placed on the front glass substrate so as to perpendicularly cross the set of anodes; and a plurality of discharge cells, each being provided so as to correspond to each of the cross points of the set of anodes and the set of cathodes, the apparatus being driven in a refresh driving method or a memory driving method, the set of cathodes are formed by a spraying method. The cathodes are made from aluminum, nickel, an aluminum alloy or a nickel alloy. The discharge gas is a mixed gas of He and Xe.