Source: http://www.google.com/patents/US20090253336?ie=ISO-8859-1
Timestamp: 2014-08-29 17:39:04
Document Index: 271004809

Matched Legal Cases: ['art 214', 'art 216', 'art 216', 'art 216', 'art 217', 'art 2010', 'art 2010']

Patent US20090253336 - Method of manufacturing organic el panel, organic el panel, and electronic ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsThere is provided a method of manufacturing an organic EL panel by using a mask that includes a blocking portion blocking incoming particles and a plurality of opening portions through which the incoming particles can pass. The method includes forming a first light emitting part corresponding to a first...http://www.google.com/patents/US20090253336?utm_source=gb-gplus-sharePatent US20090253336 - Method of manufacturing organic el panel, organic el panel, and electronic apparatusAdvanced Patent SearchPublication numberUS20090253336 A1Publication typeApplicationApplication numberUS 12/414,040Publication dateOct 8, 2009Filing dateMar 30, 2009Priority dateApr 7, 2008Also published asUS8062086Publication number12414040, 414040, US 2009/0253336 A1, US 2009/253336 A1, US 20090253336 A1, US 20090253336A1, US 2009253336 A1, US 2009253336A1, US-A1-20090253336, US-A1-2009253336, US2009/0253336A1, US2009/253336A1, US20090253336 A1, US20090253336A1, US2009253336 A1, US2009253336A1InventorsMasaki Ito, Shotaro WatanabeOriginal AssigneeSeiko Epson CorporationExport CitationBiBTeX, EndNote, RefManClassifications (7), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetMethod of manufacturing organic el panel, organic el panel, and electronic apparatusUS 20090253336 A1Abstract There is provided a method of manufacturing an organic EL panel by using a mask that includes a blocking portion blocking incoming particles and a plurality of opening portions through which the incoming particles can pass. The method includes forming a first light emitting part corresponding to a first color on a substrate by using a first mask, forming a first electrode that is overlapped with the first light emitting part by using the first mask, forming a second light emitting part corresponding to a second color on the substrate next to the first light emitting part so as to cover at least a part of the first electrode by using a second mask, forming a third light emitting part corresponding to a third color on the substrate in a position for facing the second light emitting part with the first electrode interposed therebetween in the plan view so as to cover at least a part of the first electrode or the second light emitting part, by using a third mask, forming a second electrode in an area corresponding to the second light emitting part and the third light emitting part by using a fourth mask, and removing a material that is deposited on the first electrode and the second electrode by using the first electrode and the second electrode as a mask.
1. A method of manufacturing an organic EL panel by using a mask that includes a blocking portion blocking incoming particles and a plurality of opening portions through which the incoming particles can passe the method comprising:
forming a first light emitting part corresponding to a first color on a substrate by using a first mask; forming a first electrode that is overlapped with the first light emitting part by using the first mask; forming a second light emitting part corresponding to a second color on the substrate next to the first light emitting part so as to cover at least a part of the first electrode by using a second mask; forming a third light emitting part corresponding to a third color on the substrate in a position for facing the second light emitting part with the first electrode interposed therebetween in the plan view so as to cover at least a part of the first electrode or the second light emitting part, by using a third mask; forming a second electrode in an area corresponding to the second light emitting part and the third light emitting part by using a fourth mask; and removing a material that is deposited on the first electrode and the second electrode by using the first electrode and the second electrode as a mask. 2. The method according to claim 1, wherein, after removing of the material, forming a conductive body layer in a superimposing manner so as to cover the first electrode and the second electrode.
wherein the first light emitting part, the second light emitting part, and the third light emitting part have a shape that has a longitudinal direction and a lateral direction in the plan view, and wherein the first light emitting part, the second light emitting part, and the third light emitting part are arranged in the lateral direction. 4. The method according to claim 3, wherein the width of the first light emitting part is larger than both widths of the second light emitting part and the third light emitting part in a case where the lateral direction is assumed to be the widthwise direction.
9. An organic EL panel that is formed by using the method according to claim 1.
10. An electronic apparatus that uses the organic EL panel according to claim 9. Description
SUMMARY An advantage of some aspects of the invention is that it provides a method of manufacturing an organic EL panel, an organic EL panel, and an electronic apparatus. The invention may be implemented in the following forms or applied examples.
Applied Example 1 According to Applied Example 1, there is provided a method of manufacturing an organic EL panel by using a mask that includes a blocking portion blocking incoming particles and a plurality of opening portions through which the incoming particles can pass. The method includes: forming a first light emitting part corresponding to a first color on a substrate by using a first mask; forming a first electrode that is overlapped with the first light emitting part by using the first mask; forming a second light emitting part corresponding to a second color on the substrate next to the first light emitting part so as to cover at least a part of the first electrode by using a second mask; forming a third light emitting part corresponding to a third color on the substrate in a position for facing the second light emitting part with the first electrode interposed therebetween in the plan view so as to cover at least a part of the first electrode or the second light emitting part, by using a third mask; forming a second electrode in an area corresponding to the second light emitting part and the third light emitting part by using a fourth mask; and removing a material that is deposited on the first electrode and the second electrode by using the first electrode and the second electrode as a mask.
Applied Example 2 According to Applied Example 2, in the method of manufacturing an organic EL panel according to the above-described applied example, after removing of the material, a conductive body layer is formed in a superimposing manner so as to cover the first electrode and the second electrode.
Applied Example 3 According to Applied Example 3, in the method of manufacturing an organic EL panel according to the above-described applied example, it is configured that the first light emitting part, the second light emitting part, and the third light emitting part have a shape that has a longitudinal direction and a lateral direction in the plan view, and the first light emitting part, the second light emitting part, and the third light emitting part are arranged in the lateral direction.
Applied Example 4 According to Applied Example 4, in the method of manufacturing an organic EL panel according to the above-described applied example, it is configured that the width of the first light emitting part is larger than both widths of the second light emitting part and the third light emitting part in a case where the lateral direction is assumed to be the widthwise direction.
Applied Example 5 According to Applied Example 5, in the method of manufacturing an organic EL panel according to the above-described applied example, the first mask, the second mask, and the third mask are masks that are formed as a same mask or formed by assorting dimensions thereof.
Applied Example 6 According to Applied Example 6, in the method of manufacturing an organic EL panel according to the above-described applied example, at least one between the second mask and the third mask has a width of an opening portion that is broader than that of the first mask in a case where the lateral direction is assumed to be the widthwise direction.
Applied Example 7 According to Applied Example 7, in the method of manufacturing an organic EL panel according to the above-described applied example, the removing of the material is performed by ashing using noble gas.
Applied Example 8 According to Applied Example 8, in the method of manufacturing an organic EL panel according to the above-described applied example, at least one between the second mask and the third mask performs alignment by correcting a dimensional variation due to a material attached to an end portion of the mask.
Applied Example 9 According to Applied Example 9, there is provided an organic EL panel that is formed by using the above-described method.
Applied Example 10 According to Applied Example 10, there is provided an electronic apparatus that uses the above-described organic EL panel.
DESCRIPTION OF EXEMPLARY EMBODIMENTS Configuration of Organic EL Panel Hereinafter, an organic EL panel according to an embodiment of the invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing a wiring structure of the organic EL panel according to this embodiment. This organic EL panel 1 is an active matrix type that uses a thin film transistor (hereinafter, referred to as a TFT) as a switching element. The organic EL panel 1 has a wiring configuration in which a plurality of scanning lines 101, a plurality of signal lines 102 that extend in a direction for intersecting the scanning lines 101, and a plurality of power source lines 103 that extend in parallel with the signal lines 102. In addition, pixels (sub pixels 40) are disposed near intersections of the scanning lines 101 and the signal lines 102.
As shown in FIG. 2, in an actual display area 4 located on the substrate 20, the sub pixels 40 that are disposed in correspondence with the colors R, G, and B are regularly disposed in a matrix pattern. The sub pixels 40 (R, G, and B) of the colors R, G, and B form one basic unit so as to constitute a display unit pixel 41. In addition, each sub pixel 40 (R, G, or B) is configured to include an organic EL element 17 (R, C, or B) corresponding to red light emission (R), green light emission (C), or blue light emission (B) in correspondence with operations of the TFTs 122 and 123 (see FIG. 1). Since the organic EL element 17B has a short life cycle at the current state, the organic EL element 17B has a width that is twice that of the organic EL element 17 (R or G). Here, the �width� will be defined. The plane shape of the organic EL element 17 has a longitudinal direction and a lateral direction, and the lateral direction is defined as the widthwise direction. When the organic EL elements 17 (R, C, and B) emit light with brightness assorted, a load per unit area of the organic EL element 17B can be decreased by half. Accordingly, the life characteristic of the organic EL element can be improved.
Method of Manufacturing Organic EL Panel Hereinafter, the organic EL panel according to this embodiment will be described with reference to the accompanying drawings. FIGS. 3A to 3C, FIGS. 4A to 4C, and FIG. 5 are schematic cross-section views showing a process of manufacturing the organic EL elements 17 (R, G, and B) shown in FIG. 2. Hereinafter, a method of manufacturing the organic EL element will be described with reference to the drawings.
Next, as shown in FIG. 3B, first, an organic FL element 17B (see FIG. 1) of a blue color as a first color is formed. In particular, by using an evaporation mask 200 a, which has an opening pattern, of the organic EL element 17B, a material containing ADN+BD052 (5%) (both manufactured by Idemitsu Kosan Co., Ltd) is evaporated so as to form a layer thickness of about 30 nm. Subsequently, by evaporating a layer having a layer thickness of about 20 nm by using Alq3 without removing the evaporation mask 200 a, a first light emitting part 214 that is formed by using ADN+BD52 and Alq3 is formed. Subsequently, lithium fluoride (LiF) and aluminum (Al) that configure a cathode 215 of the organic EL element 17B (to be described later) are formed to have layer thicknesses of about 0.5 nm and 200 nm.
Next, as shown in FIG. 3C, the cathode 215 and the opening portion of the evaporation mask 200 a are disposed to be partially overlapped with each other by shifting the position of the evaporation mask 200 a, so that the evaporation mask 200 a is disposed so as to form a desired width on the substrate 20. In such a case, although the width of the evaporation mask 200 a may be deviated due to attachment of a deposition material, however, precision of implementation can be improved by performing alignment for correcting the deviated width portion. Accordingly, the amount of light emission of a second light emitting part 216 can be formed with excellent implementation. Then, Alq3+quinacridone (1%) is mask-evaporated to have a layer thickness of about 30 nm. Subsequently, by evaporating Alq3 to have a layer thickness of about 20 nm without removing the evaporation mask 200 a, the second light emitting part 216 including �ALq3+quinacridone� and Alq3 which emits light of a green color as a second color is formed. In addition, by performing this process, an organic function layer 216K is incidentally generated on the cathode 215.
When such a taper shape is applied to the evaporation mask 200 c having a mask pattern of a small width, a non-opening state or an excessive opening state occurs frequently. When wet etching is performed for forming the evaporation mask 200 c, time management for a sum of an etching time in a non-opening state and an etching time after formation of an opening is needed. In a case where an etching time (t2) after formation of the opening is short with respect to the etching time (t1) in the non-opening time, when the etching speed increases by �δ�, the amount of etching changes by δ(t1+t2). Thus, an error corresponding to δt1 is added to the variation of the width of the mask pattern that is formed in accordance with the time t2. Accordingly, it becomes more difficult to control of the width of the mask pattern.
Next, as shown in FIG. 4B, LiF/Al layers configuring the cathode 218 that covers the second light emitting part 216 and the third light emitting part 217 are formed to have layer thicknesses of about 0.5 nm/200 nm by using the evaporation mask 200 b. Next, as shown in FIG. 4C, Ar ashing is performed by using the cathode 215 and the cathode 218 as masks, and whereby the organic function layer 216K and the organic function layer 217K that are incidentally generated on the cathode 215 are removed. By performing ashing in the atmosphere of Ar, compared to a case where atmosphere of oxygen or the like is used, damages occurring to the cathode 215 and the cathode 218 can be suppressed.
Electronic Apparatus Hereinafter, electronic apparatuses including the above-described organic EL panel 1 will be described with reference to FIGS. 7A to 7C. FIG. 7A shows the configuration of a mobile-type personal computer including the organic EL panel 1. The personal computer 2000 includes the organic EL panel 1 and a main body part 2010. In the main body part 2010, a power switch 2001 and a keyboard 2002 are disposed.
Classifications U.S. Classification445/58International ClassificationH01J9/00Cooperative ClassificationH01L51/56, H01L27/3211, H01L2227/323European ClassificationH01L27/32C4, H01L51/56Legal EventsDateCodeEventDescriptionMar 30, 2009ASAssignmentOwner name: SEIKO EPSON CORPORATION, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ITO, MASAKI;WATANABE, SHOTARO;REEL/FRAME:022474/0099Effective date: 20090317RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google