Method for disposing material by droplet ejection, display device, method for manufacturing display device, and electronic apparatus

• US 7,459,322 B2
• Filed: 02/28/2003
• Issued: 12/02/2008
• Est. Priority Date: 03/14/2002
• Status: Expired due to Fees

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Ito, Tatsuya, Katagami, Satoru, Kawase, Tomomi
• Primary Examiner(s): Mulpuri; Savitri
• Application Number:
  US10/375,144
• Publication Number:
  US 20040009303A1
• Time in Patent Office: 2,104 Days
• Field of Search: 438/22, 438/29, 438/30, 438/99, 427/66, 428/690, 257/40, 313/504, 445/24
• US Class Current: 438/29
• CPC Class Codes: B41M 3/003 on optical devices, e.g. lens elements; for the production of optical devices production by thermal imaging means B41M5/265
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/173 comprising banks or shadow masks
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/135 using ink-jet printing
• CPC Class Codes: H10K 71/40 Thermal treatment, e.g. annealing in the presence of a solvent vapour

Abstract

The invention provides a method for suppressing insufficient spread of droplets or mixing of the droplets in neighboring regions when a liquid material is disposed in the regions on a substrate by ejecting the droplets composed of the liquid material. In addition, for a display device, the structure in which insufficient spread of droplets or mixing of the droplets in neighboring regions can be suppressed and the manufacturing method therefor are provided. To accomplish the above, substantially square regions can be formed by a partition provided on a substrate. In each region, among internal surfaces and of the partition surrounding this region, the internal surfaces forming the long sides of the region have irregularities. In addition, the distance between parts of the partition opposing each other with one of regions provided therebetween is increased and decreased along the long side of the region. Furthermore, along the long side of the region, the width of the partition will be increased and decreased.

Claims

1. A display device, comprising:

a substrate;

a shade portion on the substrate and partition on the shade portion

display elements disposed in substantially square or strip opening portions at which the shade portion is not provided, the opening portions being lined in a first direction and a second direction, the first direction being substantially perpendicular to the second direction;

a distance between parts of the shade portion opposing each other with each of the opening portions provided therebetween being increased and decreased along an extending direction of the shade portion,

the partition having a height, the display element having a thickness extending in a direction along the height, the thickness of the display element being lower than the height of the partition, the thickness being substantially uniform and the display element being substantially flat in the region, and

the shade portion having properties of a liquid-repelling material, the shade portion being formed between the partition and the substrate as viewed from a cross-sectional direction perpendicular to the first direction and parallel to the second direction, and each of the partition and shade portion completely surrounding each region, wherein the display element is electroluminescent element.

2. The display device according to claim 1, the opening portions being substantially rectangular, and the distance between the parts of the shade portion being increased and decreased along a long side of said each of the opening portions.

3. The display device according to claim 1, a width of a part of the shade portion surrounding each of the opening portions being substantially constant along the extending direction of the shade portion.

4. The display device according to claim 1, a width of a part of the shade portion surrounding each of the opening portions being increased and decreased along the extending direction of the shade portion.

6. The display device according to claim 4, the opening portions being substantially rectangular, and the width of the part of the shade portion being increased and decreased along a long side of said each of the opening portions.

5. A display device comprising:

a substrate;

a shade portion on the substrate and partition on the shade portion

display elements disposed in substantially square or strip opening portions at which the shade portion is not provided, the opening portions being lined in a first direction and a second direction, the first direction being substantially perpendicular to the second direction;

a width of a part of the shade portion surrounding each of the opening portions being increased and decreased along an extending direction of the shade portion,

the partition having a height, the display element having a thickness extending in a direction along the height, the thickness of the display element being lower than the height of the partition, the thickness being substantially uniform and the display element being substantially flat in the region, and

the shade portion having properties of a liquid-repelling material, the shade portion being formed between the partition and the substrate as viewed from a cross-sectional direction perpendicular to the first direction and parallel to the second direction, and each of the partition and shade portion completely surrounding each region, wherein the display element is electroluminescent element.