Substrate and organic electroluminescence device using the substrate
View Patent ↗A substrate and an organic electroluminescence device employing the substrate are provided. The substrate has at least one non-continuous photo-resist coating layer formed on at least one surface of a supporting substrate and the non-continuous photo-resist coating has a plurality of continuous portions. The continuous portions may have high surface energy areas and low surface energy areas. A second photo-resist coating layer is used to at least temporarily overlap the continuous portion which corresponds to the high surface energy area in order to form the low surface energy area.
1. A substrate having a non-continuous photo-resist coating layer, an insulating layer and a pixel defining layer formed on at least one surface of a supporting substrate, wherein the non-continuous photo-resist coating layer, insulating layer and pixel defining layer comprises a plurality of continuous portions, and the plurality of continuous portions comprise:
at least one high surface energy area; and
at least one low surface energy area, wherein at least one of a second photo-resist coating layer and a mask is used to at least temporarily overlap the continuous portion corresponding to the at least one high surface energy area in order to form the at least one low surface energy area.
2. The substrate of claim 1 , wherein the high surface energy areas have a surface energy of about 60–70 dyne/cm and the low surface energy areas have a surface energy of about 20–35 dyne/cm.
3. The substrate of claim 1 , wherein the supporting substrate is rigid.
4. The substrate of claim 1 , wherein the supporting substrate is flexible.
5. The substrate of claim 1 , wherein the supporting substrate is made of at least one of glass, plastic and silicon.
6. The substrate of claim 1 , wherein the non-continuous photo-resist coating material is at least one of a Novolak based photo-resist, acrylic lacquer, epoxy lacquer and polyimide lacquer.
7. An organic electroluminescence device, comprising:
a pixel defining layer (PDL) patterned to expose an active pixel surface portion of a substrate on which the PDL is formed,
wherein the PDL includes a high surface energy area and a low surface energy area, the high surface energy area being disposed between the active pixel surface portion and the low surface energy area to prevent a decay of a coating thickness in a boundary zone of the active pixel surface portion.
8. The organic electroluminescence device according to claim 7 , wherein a surface energy of the active pixel surface portion is high.
9. The organic electroluminescence device according to claim 7 , wherein at least one layer is provided on the PDL, and a surface of the layer includes at least one area with a high surface energy and at least one area with a low surface energy.
10. The organic electroluminescence device according to claim 7 , wherein the PDL is a photo-resist coating layer.
11. The organic electroluminescence device according to claim 7 , further comprising:
a homogeneous pattern of polymer film formed over the active pixel surface portion and the high surface energy portions of the PDL.
12. The organic electroluminescence device according to claim 11 , wherein the polymer film comprises a light-emitting semi-conducting polymer (LEP).