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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKoji Tanabe, Yosuke Chikahisa, Heiji Ikoma
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All of a transparent electrode layer 2, a light-emitting layer 3, a dielectric layer 4, a back-surface electrode 5, collecting electrodes 5a, 5b, and an insulating coat layer 6 are laminated with predetermined patterns by screen printing on a insulating transparent film 1. Conductive paste used for forming transparent electrode layer 2 comprises conductive powder of indium oxide which contains needle-like powder (A) and fine-grain powder (B) at a blending ratio of (A):(B)=100:0 to 20:80. A binder resin (D), being a photo-hardening or thermal-hardening resin, is mixed with the conductive powder (C) at a blending ratio of (C):(D)=45:55 to 95:5, thereby obtaining an excellent EL lighting element. In an illuminated switch unit, a switch operating projection 14 is provided on the reverse surface of an EL lighting element 15 and this EL lighting element 15 is fixed above a membrane switch 13 via a spacer 16, thereby removing any obstacles interrupting or intercepting illumination light emitted from EL lighting element 15.
A method for manufacturing an electroluminescent lighting element, comprising the steps of:
Dependencies are inferred from the claim text.