Dispersion-type EL device and illuminated switch unit using the same
View Patent ↗A dispersion-type EL device includes a short-bar contact, a first insulating layer, a back electrode layer, a dielectric layer, a luminescent layer, and an optically transparent electrode layer, which are sequentially formed on a temporary substrate that has been processed with an exfoliation treatment. This configuration realizes a reduction in size in a thickness direction. Furthermore, an illuminated switch unit is provided, in which a dispersion-type EL device peeled off from a temporary substrate and a wiring board having a comb-like contact are connected to each other.
1. A dispersion-type EL device, comprising:
a substrate;
a short-bar contact formed on a portion of a surface of the substrate, the surface having improved peeling characteristics;
an adhesive layer formed on a further portion of the surface of the substrate and positioned around the short-bar contact such that a gap exists between the short-bar contact and the adhesive layer;
a first insulating layer formed on the short-bar contact;
a back electrode layer formed on the first insulating layer;
a dielectric layer formed on the back electrode layer;
a luminescent layer formed on the dielectric layer; and
an optically transparent electrode layer formed on the luminescent layer,
wherein the short-bar contact and the adhesive layer are formed only in the same plane, and
wherein the short-bar contact and the adhesive layer are peelable from the substrate.
2. The dispersion-type EL device according to claim 1 , further comprising:
a shield layer formed on the first insulating layer; and
a second insulating layer formed on the shield layer,
wherein the back electrode layer is formed on the second insulating layer.
3. The dispersion-type EL device according to claim 1 , further comprising:
an optically transparent protecting insulating layer formed on the optically transparent electrode layer.
4. The dispersion-type EL device according to claim 1 , further comprising:
an optically non-transparent printed layer formed on the optically transparent electrode layer.
5. The dispersion-type EL device according to claim 1 , wherein the first insulating layer is formed in the gap between the short-bar contact and the adhesive layer.