Glass plate with glass frit structure

• US 8,546,281 B2
• Filed: 12/06/2010
• Issued: 10/01/2013
• Est. Priority Date: 01/05/2007
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Jeon, Jin-Hwan, Lee, Seung-Han, Choi, Jong-Seo, Sin, Sang-Wook
• Primary Examiner(s): Group, Karl
• Assistant Examiner(s): Bolden, Elizabeth A
• Application Number:
  US12/961,404
• Publication Number:
  US 20110073880A1
• Time in Patent Office: 1,030 Days
• Field of Search: 501/17, 501/18, 501/21, 501/32, 501/41, 428/172, 428/410, 428/426, 427/58, 257/88, 257/99, 313/512, 445/24, 445/25
• US Class Current: 501/17
• CPC Class Codes: C03C 17/04 by fritting glass powder
• CPC Class Codes: C03C 2218/13 from melts
• CPC Class Codes: C03C 23/0025 by a laser beam
• CPC Class Codes: C03C 8/02 Frit compositions, i.e. in a powdered or comminuted form
• CPC Class Codes: C03C 8/04 containing zinc
• CPC Class Codes: C03C 8/14 Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
• CPC Class Codes: C03C 8/20 containing titanium compounds; containing zirconium compounds
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: Y10T 428/24612 Composite web or sheet
• CPC Class Codes: Y10T 428/315 Surface modified glass [e.g., tempered, strengthened, etc.]

Abstract

A light emitting device includes: a first substrate; a second substrate; a light emitting unit interposed between the first substrate and the second substrate; and a sealing material bonding the first substrate to the second substrate and sealing the light emitting unit. The sealing material comprises V⁺⁴. In addition, a glass frit, a composition for forming a sealing material, and a method of manufacturing a light emitting device using the composition for forming a sealing material are provided to obtain the light emitting device. The sealing material of the light emitting device can be easily formed by coating and irradiation of electro-magnetic waves, so that manufacturing costs are low and deterioration of the light emitting unit occurring when sealing material is formed can be substantially prevented. The sealing material has good sealing properties and thus a light emitting device including the sealing material has a long lifetime.

Claims

1. A glass frit device comprising:

a glass plate comprising a surface; and

a glass frit comprising vanadium in the form of V⁺⁴,

wherein the glass frit forms a closed loop on the surface of the glass plate,

wherein the glass frit has a light transmittance of about 50% or less for light with a wavelength of 810 nm;

wherein the glass fit is in the form of a sintered body, and

wherein the V⁺⁴ is present more on the surface of the sintered body than the interior of the sintered body.

2. The glass fit device of claim 1, wherein the sintered body has light transmittance of 40% or less for light with the wavelength of 810 nm.

3. The glass fit device of claim 1, wherein the sintered body has light transmittance of 40% or less for light with a wavelength from about 650 nm to about 1000 nm.

4. The glass frit device of claim 1, wherein the V⁺⁴ is present in the glass frit in an amount from about 0.0001 wt % to about 10 wt %.

5. The glass frit device of claim 1, wherein the glass frit further comprises at least one ion selected from the group consisting of V⁺⁵, Ba⁺², Zn⁺², Te⁺⁴, Fe⁺³, Cu⁺², Nd⁺², K⁺¹, Sb⁺³, P⁺⁵, Ti⁺², Al⁺³, B⁺³, W⁺⁶, Sn⁺², Bi⁺³, Ca⁺², Si⁺⁴, Zr⁺⁴, and Mg⁺².

6. The glass frit device of claim 1, wherein the glass frit further comprises at least one ion selected from the group consisting of V⁺⁵, Ba⁺², Zn⁺² and Te⁺⁴.

7. The glass frit device of claim 1, wherein the glass frit further comprises at least one reductant selected from the group consisting of Sn, Al, Mg, Cu, and Zn.

8. The glass frit device of claim 1, wherein the presence of the V⁺⁴ in the glass frit is detectable by X-ray Photoelectron Spectroscopy (XPS).

9. A method of manufacturing the glass fit device of claim 1, comprising:

providing the glass plate comprising the surface;

forming a closed loop structure of a paste composition;

heating the closed loop structure so as to form the glass frit forming a closed loop on the surface; and

wherein the glass frit comprises V⁺⁴ and has a light transmittance of about 50% or less for light with a wavelength of 810 nm.

10. The method of claim 9, wherein heating of the closed loop structure is performed under an N₂ atmosphere.

11. The method of claim 9, wherein the heat treatment temperature of the heating of the closed loop structure is from about 250°

C. to 750°

C.

12. The method of claim 9, wherein the heat treatment temperature of the heating of the closed loop structure is from about 350°

C. to 550°

C.

13. The method of claim 9, wherein the heat treatment temperature of the heating of the closed loop structure is 420°

C.

14. The method of claim 9, wherein the heat treatment time of the heating the closed loop structure is from about 5 minutes to about 240 minutes.

15. The method of claim 9, wherein the heat treatment time of the heating the closed loop structure is 240 minutes.

16. A method of making a display device, the method comprising:

providing the glass frit device of claim 1;

providing an intermediate device comprising a substrate and an array of light emitting devices formed on the substrate;

arranging the glass frit device and the intermediate device such that the glass frit is interposed between the glass plate and the substrate, and wherein the glass frit contacts the substrate while surrounding the array; and

applying a laser onto the glass frit so as to bond the glass frit to the substrate.

17. The method of claim 16, wherein the glass frit has a light transmittance of the laser about 40% or less.

18. A display device comprising:

a first substrate;

a second substrate;

an array of light emitting devices interposed between the first substrate and the second substrate; and

the glass frit device of claim 1,

wherein the glass frit is interposed between and bonds the first substrate to the second substrate.

19. The light emitting device of claim 18, wherein the light emitting device comprises an organic light emitting diode.