Claims
- 1. A method for preparing an organic electroluminescent display device comprising the steps of:forming a groove structure in an insulative substrate or an underlying layer on the substrate, forming a first electrode, forming at least an organic layer participating in light emission capability, and depositing a second electrode, wherein the step of depositing a second electrode uses a process having low step coverage whereby said second electrode is isolated by the resulting groove structure.
- 2. The method for preparing an organic electroluminescent display device of claim 1 wherein said first electrode, said organic layer and said second electrode are formed by a vapor phase deposition process.
- 3. The method for preparing an organic electroluminescent display device of claim 1 wherein said second electrode is formed by oblique evaporation.
- 4. The method for preparing an organic electroluminescent display device of claim 1, further comprising the step of forming an overhang near at least one side of an opening of the groove structure during or after the step of forming a groove structure, said overhang extending generally parallel to the substrate and toward the center of the groove structure.
- 5. The method for preparing an organic electroluminescent display device of claim 1, further comprising the step of forming a three-dimensional structure during the step of forming a groove structure, said three-dimensional structure extending from a bottom of said groove structure and orthogonal to a surface of the substrate and having a height which is not higher than the second electrode layer in a light emitting region.
- 6. The method for preparing an organic electroluminescent display device of claim 1, wherein said overhang is formed using an insulative material, and a portion of said overhang is formed on the substrate or the underlying layer so as to cover a portion of said first electrode.
Priority Claims (1)
Number |
Date |
Country |
Kind |
10-121736 |
Apr 1998 |
JP |
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Parent Case Info
This Application is a Divisional of Ser. No. 09/192,566, filed Nov. 17, 1998, now U.S. Pat. No. 6,091,078.
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