CN1780507A - Organic electroluminescent display panel and production thereof - Google Patents
Organic electroluminescent display panel and production thereof Download PDFInfo
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- CN1780507A CN1780507A CN 200410091577 CN200410091577A CN1780507A CN 1780507 A CN1780507 A CN 1780507A CN 200410091577 CN200410091577 CN 200410091577 CN 200410091577 A CN200410091577 A CN 200410091577A CN 1780507 A CN1780507 A CN 1780507A
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Abstract
The invention consists of an organic electroluminescence structure, a first insulating layer, and a second insulating layer. The organic electroluminescence structure is located in the baseboard. The first insulating layer is located above the organic electroluminescence structure, and has a gap with the organic electroluminescence structure. The second insulating layer sits at baseboard, and totally covers the first insulating layer and the organic electroluminescence structure in order to obstruct water vapor, oxygen and other pollutants.
Description
Technical field
The invention relates to a kind of display unit and manufacture method thereof, and particularly relevant for the invention of a kind of organic EL display panel (OrganicElectro-luminescence Display Panel) and manufacture method thereof.
Background technology
Because multimedia society is progressive rapidly, the technology of semiconductor element and display unit also has tremendous progress thereupon.With regard to display, because display of organic electroluminescence has the restriction of no visual angle, hangs down manufacturing cost, high answer speed (being about more than hundred times of liquid crystal), power saving, the DC driven that can be used in portable machine, operating temperature range is big and in light weight and can meet the characteristic requirement of multimedia era display with advantages such as computer hardware miniaturization and slimmings.Therefore, display of organic electroluminescence has great development potentiality, is expected to become next novel flat-panel screens from generation to generation.
The luminous mechanism of display of organic electroluminescence is to combine with electronics by the hole to launch photon in organic material layer, but because general organic material is mostly easily because of making moist or oxidation changes its material behavior, and then influence its luminous mechanism, even cause light-emitting component to lose efficacy, therefore in the manufacturing process of organic EL display panel, how to prevent that the organic material layer oxidation of making moist from being very important problem.
Fig. 1 is a kind of generalized section of known organic EL display panel.Please refer to Fig. 1, tradition organic EL display panel 120 utilizes fluid sealant (sealant) 104 that epoxy resin constitutes with substrate 100 and cap 106 pressurizing attachings, make its curing with ultraviolet irradiation fluid sealant 104 again, so that organic electroluminescence structure 102 is enclosed between substrate 100 and the cap 106.Yet; because outside aqueous vapor and oxygen still can be infiltrated between substrate 100 and the cap 106 by fluid sealant 104; and then damage organic electroluminescence structure 102 and other electrical components, thus can on cap 106, form absorbent material piece 114 usually, so that absorb the aqueous vapor of infiltrating.But this kind practice is applicable to the organic EL display panel of bottom-emission type (bottom emission), if in the organic EL display panel of top emission type (top emission), absorbent material piece 114 is set, will reduce the aperture opening ratio of this display floater.
In order to intercept the infiltration of aqueous vapor and oxygen and other pollutant effectively, the another kind of known practice is arranged, applicable to the organic EL display panel of top emission type and bottom-emission type.Fig. 2 is the generalized section of another kind of known organic EL display panel.Please refer to Fig. 2, organic EL display panel 130 utilizes evaporation process and alternately form the organic film 110 and inorganic thin film 112 that multilayer has the effect that intercepts aqueous vapor and oxygen on organic electroluminescence structure 102, so that organic electroluminescence structure 102 is coated under these films fully, and then avoid aqueous vapor and oxygen that organic electroluminescence structure 102 is caused damage.And, if organic EL display panel 130 is the top emission type organic electro luminescent display floater, all can use the material of light-permeable to form organic film 110 and inorganic thin film 112.Yet, organic film 110 is higher with the evaporation process complexity of inorganic thin film 112, and residual heat stress in organic electroluminescence structure 102, organic film 110 and inorganic thin film 112 easily, and then cause the organic electroluminescence structure distortion, even be damaged.
Summary of the invention
Therefore, purpose of the present invention just provides a kind of organic EL display panel, can have preferable useful life.
Another object of the present invention provides a kind of manufacture method of organic EL display panel, can make organic EL display panel have preferable barriering effect for aqueous vapor and oxygen.
The present invention proposes a kind of organic EL display panel, mainly is to be made of organic electroluminescence structure, first barrier layer and second barrier layer.Wherein, organic electroluminescence structure is arranged on the substrate, and first barrier layer is arranged on the top of organic electroluminescence structure, and has the gap between first barrier layer and the organic electroluminescence structure.Second barrier layer then is arranged on the substrate, and coats first barrier layer and organic electroluminescence structure fully.
The present invention proposes a kind of manufacture method of organic EL display panel, and the method is to form organic electroluminescence structure at substrate earlier.Then, above organic electroluminescence structure, form first barrier layer, and make between first barrier layer and the organic electroluminescence structure and have the gap.Then, on substrate, form second barrier layer, and make second barrier layer envelope first barrier layer and organic electroluminescence structure fully.
The present invention is provided with first barrier layer and intercepts aqueous vapor and oxygen above organic electroluminescence structure, and envelope the organic electroluminescence structure and first barrier layer fully, so that further intercept aqueous vapor and the oxygen that infiltrates by first fluid sealant with second barrier layer.The stress that first barrier layer is born particularly, has the gap between first barrier layer and the organic electroluminescence structure, so can be passed on the organic electroluminescence structure hardly.
State with other purpose, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is a kind of generalized section of known organic EL display panel.
Fig. 2 is the generalized section of another kind of known organic EL display panel.
Fig. 3 A to Fig. 3 C is the manufacturing process generalized section of a kind of organic EL display panel of a preferred embodiment of the present invention.
Fig. 4 is the generalized section of a kind of organic EL display panel of another preferred embodiment of the present invention.
The main element description of symbols
100,302: substrate
102,304: organic electroluminescence structure
104: fluid sealant
106,314: cap
110: organic film
112: inorganic thin film
114: the absorbent material piece
120,130,300: organic EL display panel
304a: first electrode layer
304b: organic function layer
304c: the second electrode lay
306: the first barrier layers
308: the gap
310: the first fluid sealants
312: the second barrier layers
316: the second fluid sealants
Embodiment
Fig. 3 A to Fig. 3 C is the manufacturing process generalized section of a kind of organic EL display panel of a preferred embodiment of the present invention.Please refer to Fig. 3 A, at first on substrate 302, form organic electroluminescence structure 304, wherein, organic electroluminescence structure 304 is made of the first electrode layer 304a, organic function layer 304b and the second electrode lay 304c, and first be transparency electrode one of among electrode layer 304a and the second electrode lay 304c, and perhaps both are all transparency electrode.In addition, organic electroluminescence structure 304 can be the active organic electroluminescent structure, also can be the passive type organic electroluminescence structure.If organic electroluminescence structure 304 is the active organic electroluminescent structure, then the first electrode layer 304a is pixel electrode, and the second electrode lay 304c then is shared electrode (common electrode).If organic electroluminescence structure 304 is the passive type organic electroluminescence structure, then the first electrode layer 304a is made of a plurality of first parallel each other strip shaped electric poles, the second electrode lay 304c is then by a plurality of parallel each other, and second strip shaped electric poles vertical with first strip shaped electric poles constitutes.The professional of technical field that the present invention belongs to should understand the detailed structure of the organic electroluminescence structure of active and passive type, therefore no longer draws detailed accompanying drawing herein.At this, organic function layer 304b can also comprise other rete except comprising organic luminous layer, for example electron transfer layer, hole transmission layer, electron injecting layer and hole injection layer or the like.
Please continue A, first barrier layer 306 is set above organic electroluminescence structure 304, and be formed with gap 308 between first barrier layer 306 and the organic electroluminescence structure 304 with reference to Fig. 3.Therefore specifically, the thickness of first barrier layer 306 enough thick (being about 50 to 300 microns in one embodiment) has enough mechanical strengths so that its can and organic electroluminescence structure 304 between form gap 308.At this, first barrier layer 306 for example is after the film forming, it to be arranged on the top of organic electroluminescence structure 304 in other technology or molding equipment again.In addition, first barrier layer 306 is made of organic material, and preferably by acrylic acid (acrylic), methacrylic acid (methacrylic), polyester (polyester, PET), polyethylene terephthalate (polyethyleneterephthalate), polyethylene (polyethylene, PE), a kind of in polypropylene (polypropylene) and the group that formed thereof constitute.The thickness of first barrier layer 306 for example is between 100～200 microns.
In one embodiment, on organic electroluminescence structure 304, form first barrier layer 306, and making the method that forms gap 308 between the organic electroluminescence structure 304 and first barrier layer 306 for example is before forming first barrier layer 306, earlier coating first fluid sealant 310 on the substrate 302 around the organic electroluminescence structure 304.And then first barrier layer 306 is positioned over substrate 302 tops, and it is contacted with first fluid sealant 310.Then solidify first fluid sealant 310, with sealing-in first barrier layer 312 and substrate 302, so that organic electroluminescence structure 304 is enclosed between the substrate 302 and first barrier layer 312, and between the organic electroluminescence structure 304 and first barrier layer 306, form gap 308.The method of solidifying first fluid sealant 310 for example is to reach by ultraviolet irradiation or other curing mode.
Professional that it should be noted that technical field that the present invention belongs to can also otherwise make formation gap 308 between the organic electroluminescence structure 304 and first barrier layer 306, and the formation method that the present invention does not limit gap 308 is that the foregoing description is described.
Please refer to Fig. 3 B, on substrate 302, form second barrier layer 312, so that first barrier layer 306 is covered by in second barrier layer 312 fully with organic electroluminescence structure 304, so that the further infiltration of blocking oxygen and aqueous vapor, and then avoid organic electroluminescence structure 304 to be damaged.Certainly, if be formed with first fluid sealant 310 between first barrier layer 306 and the organic electroluminescence structure 304, then first fluid sealant 310 also can be covered by in second barrier layer 312, shown in Fig. 3 B fully.
From the above, in a preferred embodiment, second barrier layer 312 is made of inorganic material, and the thickness of second barrier layer 312 for example is between 1 micron (μ m) to 5 microns (μ m), and the method that forms second barrier layer 312 for example is to carry out depositing operation.The inorganic material that constitutes second barrier layer 312 for example is to be selected from a kind of in the group that oxide, nitride, carbide and nitrogen oxide form.With oxide, preferably a kind of in silica, aluminium oxide, titanium oxide, indium oxide, tin oxide, indium tin oxide and the group that formed thereof.With nitride, preferably a kind of in aluminium nitride, silicon nitride and the group that formed thereof.
More particularly, the composite bed (as shown in Figure 4) that second barrier layer 312 can also be made up of stratified film is so that increase the usefulness that intercepts aqueous vapor and oxygen.The present invention does not limit the number of plies that constitutes second barrier layer 312.
After finishing the structure shown in Fig. 3 B, finished the making of the present invention's organic EL display panel 300 haply.But in general, on substrate 302 all main elements after setting completed, then can be provided with cap above substrate 302, the element that is arranged on the substrate 302 with protection is difficult for being damaged in the process of follow-up assembling or carrying.The setting up procedure of cap below will be described.
Please refer to Fig. 3 C, in one embodiment, the step that cap 314 is set for example is to be coated with second fluid sealant 316 earlier on substrate 302, then cap 314 is arranged on substrate 302 tops, and it is contacted with second fluid sealant 316, pressing substrate 302 and cap 314 solidify second fluid sealant 316 again so that substrate 302 and cap 314 sealing-ins make organic electroluminescence structure 304, first barrier layer 306 and second barrier layer 312 be enclosed between substrate 302 and the cap 314 afterwards.The mode of solidifying second fluid sealant 316 for example is with ultraviolet irradiation or other curing mode.The material of cap 314 for example is glass, plastics or metal etc.The technology of panel the subsequent technique of organic EL display panel 300 (as test technology etc.) promptly is same as, technical field that the present invention belongs to professional can understand its detailed process, repeats no more herein.
To be the organic EL display panel that example illustrates the present invention below with Fig. 3 B.Please refer to Fig. 3 B, organic EL display panel 300 is made of organic electroluminescence structure 304, first barrier layer 306 and second barrier layer 312.Wherein, organic electroluminescence structure 304 is arranged on the substrate 302, and organic electroluminescence structure 304 for example is the organic electroluminescence structure of active or passive type.First barrier layer 306 is arranged on the top of organic electroluminescence structure 304, and and organic electroluminescence structure 304 between have gap 308.First barrier layer 306 is made of aforementioned or other organic material, and its thickness for example is between 50 to 300 microns.
In one embodiment, for example be to be provided with first fluid sealant 310 between first barrier layer 306 and the substrate, and first barrier layer 306 for example be by fluid sealant 310 with substrate 302 sealing-ins, thereby organic electroluminescence structure 304 is enclosed between first barrier layer 306 and the substrate 302.
In another embodiment, organic EL display panel 300 also comprises the cap 314 and second fluid sealant 316.Wherein, second fluid sealant 316 is arranged on the substrate 302, and cap 314 is arranged on the top of substrate 302, and by second fluid sealant 316 and with substrate 302 sealing-ins, and then organic electroluminescence structure 304, first barrier layer 306 and second barrier layer 312 all are enclosed between cap 314 and the substrate 302, shown in Fig. 3 C.
In sum, the present invention is except intercepting aqueous vapor and oxygen and other pollutant in that first barrier layer is set above the organic electroluminescence structure, also envelope the organic electroluminescence structure and first barrier layer fully, so that further intercept aqueous vapor and oxygen and other pollutant that infiltrates by first fluid sealant with second barrier layer.The stress that first barrier layer is born particularly, has the gap between first barrier layer and the organic electroluminescence structure, so can be passed on the organic electroluminescence structure hardly.For instance, in the technology of display floater, if first barrier layer is subjected to certain stress and produces distortion, owing to first barrier layer does not contact with organic electroluminescence structure, so organic electroluminescence structure can't produce distortion distortion thereupon because of first barrier layer.In addition, the present invention can also form second barrier layer by stratified film, so that more effectively intercept aqueous vapor and oxygen and other pollutant, and then avoid organic electroluminescence structure to suffer the infringement of aqueous vapor and oxygen, to prolong the useful life of organic EL display panel.
In addition, in the present invention's organic EL display panel, because first barrier layer and second barrier layer can be transparent retes, and first electrode layer and the second electrode lay that constitute organic electroluminescence structure can be transparency electrode simultaneously also, cap then can be glass or other transparent material, therefore utilize the present invention's technology can make the organic EL display panel of bottom-emission type or top emission type, or even the organic EL display panel of dual-side luminescent type.
Though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; the professional of any technical field that the present invention belongs to; without departing from the spirit and scope of the invention; when can doing a little change and improvement, so the present invention's protection range is as the criterion when looking claims person of defining.
Claims (18)
1. organic EL display panel is characterized in that comprising:
Organic electroluminescence structure is arranged on the substrate;
First barrier layer is arranged at above-mentioned organic electroluminescence structure top, and has the gap between this first barrier layer and the above-mentioned organic electroluminescence structure; And
Second barrier layer is arranged on the aforesaid substrate, and envelopes above-mentioned first barrier layer and organic electroluminescence structure fully.
2. the organic EL display panel according to claim 1 is characterized in that the material of above-mentioned first barrier layer comprises organic material.
3. the organic EL display panel according to claim 2 is characterized in that above-mentioned organic material is to be selected from a kind of in the group that is made up of acrylic acid, methacrylic acid, polyester, polyethylene terephthalate, polyethylene and polypropylene.
4. the organic EL display panel according to claim 1, the thickness that it is characterized in that above-mentioned first barrier layer is between 50 microns to 300 microns.
5. the organic EL display panel according to claim 1 is characterized in that the material of above-mentioned second barrier layer comprises inorganic material.
6. the organic EL display panel according to claim 5 is characterized in that above-mentioned inorganic material is to be selected from a kind of in the group that is made up of oxide, nitride, carbide and nitrogen oxide.
7. the organic EL display panel according to claim 6 is characterized in that above-mentioned oxide is to be selected from a kind of in the group that is made up of silica, aluminium oxide, titanium oxide, indium oxide, tin oxide and indium tin oxide.
8. the organic EL display panel according to claim 6 is characterized in that above-mentioned nitride is to be selected from a kind of in the group that is made up of aluminium nitride and silicon nitride.
9. the organic EL display panel according to claim 1 is characterized in that above-mentioned second barrier layer comprises composite bed.
10. the organic EL display panel according to claim 1, the thickness that it is characterized in that above-mentioned second barrier layer is between 1 micron to 5 microns.
11. the organic EL display panel according to claim 1, it is characterized in that also comprising first fluid sealant, be arranged between the aforesaid substrate and first barrier layer, with above-mentioned first barrier layer of sealing-in and substrate, and above-mentioned organic electroluminescence structure is enclosed between above-mentioned first barrier layer and the substrate.
12. the organic EL display panel according to claim 1 is characterized in that also comprising:
Cap is arranged at the aforesaid substrate top; And
Second fluid sealant is arranged between above-mentioned cap and the substrate, with above-mentioned cap of sealing-in and substrate, and above-mentioned organic electroluminescence structure, first barrier layer and second barrier layer is enclosed between above-mentioned cap and the substrate.
13. the organic EL display panel according to claim 1 is characterized in that above-mentioned organic electroluminescence structure comprises a kind of in active organic electroluminescent structure and the passive type organic electroluminescence structure.
14. the manufacture method of an organic EL display panel is characterized in that comprising:
On substrate, form organic electroluminescence structure;
Form first barrier layer in above-mentioned organic electroluminescence structure top, and make between this first barrier layer and the above-mentioned organic electroluminescence structure and have the gap; And
On aforesaid substrate, form second barrier layer, and make this second barrier layer envelope above-mentioned first barrier layer and organic electroluminescence structure fully.
15., it is characterized in that the step that forms above-mentioned first barrier layer above above-mentioned organic electroluminescence structure comprises according to the manufacture method of the described organic EL display panel of claim 14:
State on the aforesaid substrate organic electroluminescence structure around form first fluid sealant;
Above-mentioned first barrier layer is placed on the aforesaid substrate, and it is contacted with above-mentioned first fluid sealant; And
Solidify above-mentioned first fluid sealant, and above-mentioned organic electroluminescence structure is enclosed between above-mentioned first barrier layer and the substrate.
16. according to the manufacture method of the described organic EL display panel of claim 14, the method that it is characterized in that forming above-mentioned second barrier layer comprises carries out depositing operation.
17. according to the manufacture method of the described organic EL display panel of claim 14, it is characterized in that after forming above-mentioned second barrier layer, also be included in the aforesaid substrate top cap is set.
18., it is characterized in that the step that above-mentioned cap is set comprises according to the manufacture method of the described organic EL display panel of claim 17:
On aforesaid substrate, form second fluid sealant;
Above-mentioned cap is positioned on the aforesaid substrate, and it is contacted with above-mentioned second fluid sealant; And
Solidify above-mentioned second fluid sealant, and above-mentioned organic electroluminescence structure, first barrier layer and second barrier layer are enclosed between above-mentioned cap and the substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410091577 CN1780507A (en) | 2004-11-19 | 2004-11-19 | Organic electroluminescent display panel and production thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410091577 CN1780507A (en) | 2004-11-19 | 2004-11-19 | Organic electroluminescent display panel and production thereof |
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| CN1780507A true CN1780507A (en) | 2006-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410091577 Pending CN1780507A (en) | 2004-11-19 | 2004-11-19 | Organic electroluminescent display panel and production thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738205A (en) * | 2012-07-04 | 2012-10-17 | 信利半导体有限公司 | Organic electroluminescence display and fabrication method thereof |
| CN111201630A (en) * | 2017-11-10 | 2020-05-26 | 深圳市柔宇科技有限公司 | Method for manufacturing organic electroluminescent display panel |
-
2004
- 2004-11-19 CN CN 200410091577 patent/CN1780507A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738205A (en) * | 2012-07-04 | 2012-10-17 | 信利半导体有限公司 | Organic electroluminescence display and fabrication method thereof |
| CN111201630A (en) * | 2017-11-10 | 2020-05-26 | 深圳市柔宇科技有限公司 | Method for manufacturing organic electroluminescent display panel |
| CN111201630B (en) * | 2017-11-10 | 2022-03-25 | 深圳市柔宇科技有限公司 | Method for manufacturing organic electroluminescent display panel |
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