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Electrooptical device, electronic apparatus, and method for producing electrooptical device

An electro-optical device and manufacturing method technology, applied in semiconductor/solid-state device manufacturing, circuits, electrical components, etc., can solve problems such as differences in ink thickness, differences, and inability to achieve light emission

Inactive Publication Date: 2009-01-28
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, as described above, the inside of the arc formed on the short side has poor ink wettability, and there is a problem that ink tends to overflow on the long side.
Therefore, there is a problem that the thickness of the ink ejected into the opening varies, and as a result, uniform light emission cannot be achieved.
[0009] However, when the light-emitting area is reduced with high definition, it is necessary to reduce the opening of the cell bank. Depending on the accuracy of the amount of protrusion of the cofferdam, the thickness of the ejected ink will vary
As a result, there is a problem that light cannot be emitted uniformly (differences in light emission characteristics occur).
In addition, since the stepped two-layer storage bank is formed, there is a problem that the amount of protrusion toward the light-emitting region is increased, and the numerical aperture is particularly reduced on the narrower side of the opening.
[0010] In addition, if the light-emitting area becomes smaller (that is, high-definition), the curvature of the arc becomes larger, especially during the drying process, the ink in the arc portion tends to shrink
Therefore, it is not easy to fill the ink, and when a large amount of ink is replenished to ensure the film thickness, there is a problem that the ink tends to overflow on the long side.
As a result, since there is a difference in the contact angle to the ink on the long side and the short side, there is a problem that the thickness of the ink in the opening part varies, and uniform light emission (difference in light emission characteristics) occurs.

Method used

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  • Electrooptical device, electronic apparatus, and method for producing electrooptical device
  • Electrooptical device, electronic apparatus, and method for producing electrooptical device
  • Electrooptical device, electronic apparatus, and method for producing electrooptical device

Examples

Experimental program
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no. 1 Embodiment approach

[0090] 1 is a schematic cross-sectional view showing a partial structure of an organic EL device as an electro-optical device according to a first embodiment. figure 2 It is a schematic diagram showing the structure of the cell bank at the stage where the cell bank is formed in the organic EL device. (a) is a schematic plan view of the organic EL device viewed from above, (b) is a schematic cross-sectional view along the A-A section of the organic EL device shown in (a), and (c) is a schematic cross-sectional view along the organic EL device shown in (a). A schematic cross-sectional view of the B-B cross-section of the EL device. In addition, FIG. 1 is a figure which shows the cross-sectional positional relationship of each component, and the relative positional relationship is not mentioned for now. Referring to Figure 1 below, figure 2 The structure of the organic EL device will be described.

[0091] As shown in FIG. 1, an organic EL device 11 emits light in a light emit...

no. 2 Embodiment approach

[0137] Figure 5 It is a schematic diagram which shows the structure of the storage cell cofferdam of 2nd Embodiment. (a) is a schematic plan view of the organic EL device viewed from above, (b) is a schematic cross-sectional view along the A-A section of the organic EL device shown in (a), and (c) is a schematic cross-sectional view along the organic EL device shown in (a). A schematic cross-sectional view of the B-B cross-section of the EL device. Below, refer to Figure 5 , to illustrate the structure of the storage cell cofferdam. In addition, the structure of the storage cell cofferdam in the second embodiment differs from that in the first embodiment in that the first lower storage cell cofferdam is formed on the lower side of the upper storage cell cofferdam in the area on the arc side. The lower storage cell cofferdam is not formed in the area of ​​the straight line. Hereinafter, the same reference numerals are assigned to the same components as those in the first ...

no. 3 Embodiment approach

[0143] Figure 6 It is a schematic diagram which shows the structure of the storage cell cofferdam of 3rd Embodiment. (a) is a model top view of the storage cell cofferdam viewed from above, (b) is a model section view along the A-A section of the storage cell cofferdam shown in (a), (c) is a model view along the cell cofferdam shown in (a) The model section diagram of the B-B section of the storage cell cofferdam. Below, refer to Figure 6 , to illustrate the structure of the storage cell cofferdam. In addition, the structure of the cell cofferdam of the third embodiment differs from that of the first embodiment in that only the second lower cell cofferdam is formed on the lower side of the upper layer cell cofferdam in the region of the straight line portion. Hereinafter, the same reference numerals are assigned to the same components as those in the first embodiment, and descriptions thereof will be omitted or simplified.

[0144] Such as Figure 6 As shown, in the are...

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Abstract

The invention provides an electrooptical device capable of restraining irradiance characteristic difference, electronic appliance and a method for the electrooptical device. An organic EL device is provided with a glass substrate, a circuit element layer and a cathode. A light-emitting element layer is provided with a functional layer formed on a pixel electrode and a lattice storing cofferdam dividing the functional layer. The lattice storing cofferdam is provided with a first lower layer lattice storing cofferdam, a second lower layer lattice storing cofferdam and a upper layer lattice storing cofferdam. The lattice storing cofferdam is in a magnetic track shape, and has a irradiance area with different length to width ratio and a circular arc area at the short edge side of the irradiance area. In the irradiance area, the first lower layer lattice storing cofferdam, the second lower layer lattice storing cofferdam and the upper layer lattice storing cofferdam form in an echelonment. On the other hand, the first lower layer lattice storing cofferdam and the upper layer lattice storing cofferdam form form in an echelonment.

Description

technical field [0001] The present invention relates to an electro-optic device, an electronic device, and a method for manufacturing an electro-optic device in which a functional layer is formed at an opening of a storage cell cofferdam. Background technique [0002] An organic EL (electroluminescence) device is known as one of the above-mentioned electro-optical devices. An organic EL device has a structure in which a light-emitting layer made of a light-emitting material is sandwiched between an anode and a cathode. The method of manufacturing an organic EL device includes, for example, a step of ink-forming a light-emitting material and spraying the ink onto a light-emitting region on a substrate by an inkjet method. In the light-emitting region on the substrate, there is formed a bank made of, for example, an organic material (for example, acrylic resin) for filling a predetermined portion with ink. [0003] In the cell bank, for example, a track-like opening having l...

Claims

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Application Information

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IPC IPC(8): H01L27/32H01L21/82H01L21/84
Inventor 柳原弘和
Owner SEIKO EPSON CORP
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