Patent ID: 7586256
Filing Date: 2009-09-08
Classification: H05B

Abstract:
1. A combined substrate and dielectric layer component for use in an EL laminate, comprising: a rigid substrate providing a rear electrode; and a thick film dielectric layer formed above the rigid substrate providing the rear electrode by (a) a thick film technique with a first ceramic material paste in one or more layers to a thickness of 10 to 300 μm, followed by drying, then pressing the thick film dielectric layer and the rigid substrate providing the rear electrode so as to produce a pressed thick film dielectric layer having reduced thickness, surface roughness and porosity, and then sintering the pressed thick film dielectric layer, the rigid substrate providing the rear electrode to form a pressed, sintered thick film dielectric layer; and (b) depositing a second ceramic material by a sol gel technique on the pressed, sintered thick film dielectric layer and then heating to form a sol gel dielectric layer to further smooth the surface of the pressed, sintered thick film dielectric layer, such that the thick film dielectric layer so formed has a dielectric strength which is greater than 5.0×10