Source: https://patents.google.com/patent/US7948177
Timestamp: 2018-02-20 09:59:23
Document Index: 375872345

Matched Legal Cases: ['Application No. 95148351', 'Application No. 07101243', 'application No. 07101255', 'Application No. 07101235', 'Application No. 2006', 'Application No. 2006', 'Application No. 10', 'Application No. 10', 'Application No. 200710007779']

US7948177B2 - Flat panel display device with protective layer structure and method of making the same - Google Patents
Flat panel display device with protective layer structure and method of making the same
US7948177B2
US7948177B2 US11640697 US64069706A US7948177B2 US 7948177 B2 US7948177 B2 US 7948177B2 US 11640697 US11640697 US 11640697 US 64069706 A US64069706 A US 64069706A US 7948177 B2 US7948177 B2 US 7948177B2
US11640697
US20070178796A1 (en )
FLAT PANEL SDISHN.090AUS Dec. 18, 2006 11/640,581
FLAT PANEL SDISHN.094AUS Dec. 18, 2006 11/640,709
Therefore, when encapsulating the second substrate 301 a and the first substrate by using the frit 307 a due to the step d2, the frit 307 a in a solid state is contacted with only the high portion of the protective film 306 a. Under the circumstance, if the frit 307 a is heated to have viscosity, the time that heat is applied to the high portion of the protective film 306 a is longer than the time that heat is applied to the lower portion thereof, resulting in that the first metal film 303 a and the second metal film 305 a located beneath the lower thereof may be damaged by heat generated during encapsulating the first substrate and the second substrate 310 a with the frit 307 a.
And, in a fabricating a plurality of devices by using a mother plate that after a plurality of arrays of pixels are formed and examined on one large substrate, they are divided by cutting the large substrate, an examination may not be smoothly progressed on each wire into which examination signals are input if its line resistance is large, causing a problem that the thickness of a metal film 14 cannot be thin.
FIG. 4 is a cross-sectional view for showing a cross-section of a flat panel display device shown in FIG. 2 and FIG. 3. Referring to FIG. 4, on the substrate, a structure is formed. A buffer layer 301 b is formed on the upper of a transparent substrate 300 b, a first insulating film 302 b is formed on the upper of the buffer layer 301 b and a fist metal film 303 b is then formed. In one embodiment, the thickness of the first insulating film is about 1200 Å, and the thickness of the first metal film is about 2000 Å. And, after the second insulating film 304 b having the thickness of about 5000 Å is formed on a predetermined region of the second insulating film 304 b is etched. Although the first insulating film 302 b can be also etched during the process of etching the second insulating film 304 b, the first insulating film 302 b is protected by the first metal film or conductive line 303 b. However, the region of the first insulating film 302 b, which is not protected by the first metal film 303 b, can be etched. And, the second metal film 305 b is formed on the predetermined region etched. The thickness of the second metal film 305 b is about 5000 Å. Therefore, since the second insulating film 304 b is etched in a predetermined region, the whole of the second metal film 305 b is directly contacted with the first metal film 303 b, resulting in that the first metal film 303 b and the second metal film 305 b function as one metal film. When examining arrays formed on a mother plate, the line resistance of the line receiving an examination signal can be reduced. And, the protective film 306 b having the thickness of about 7000 Å is formed on the upper of the second insulating film 304 b on which the second metal film 305 b is formed. And, the second substrate 310 b and the first substrate are encapsulated by using the frit 307 b.
In the above and other embodiments, since the second insulating film 304 b is etched where the second metal film 305 b is formed, a step or stepped distance d3 between the surfaces of the protective film 306 b becomes small compared with the FIG. 1. That is, the step the protective film 306 b is reduced by etching of the second insulating film 304 b, and thus becomes about 2000 Å. The step d3 can be more reduced by controlling the thickness of the first metal film 303 b and the second metal film 305 b.
In certain embodiments, the step distance d3 is about 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 150, 200, 250, 300, 400, 500, 700, 1000, 1500, 2000, 2500, 3000 or 3500 Å. In some embodiments, the step distance d3 may be within a range defined by two of the foregoing distances. In certain embodiments, the ratio of the step distance d3 to a thickness of the protective layer is about 0.001, 0.002, 0.005, 0.01, 0.02, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.7 or 1.0. In some embodiments, the ratio of the step distance d3 to a thickness of the protective layer may be within a range defined by two of the foregoing numerals. In certain embodiments, the ratio of the step distance d3 to a thickness of the second insulating layer is about 0.001, 0.002, 0.005, 0.01, 0.02, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.7 or 1.0. In some embodiments, the ratio of the step distance d3 to the thickness of the second insulating layer may be within a range defined by two of the foregoing numerals.
In the above and other embodiments, since the protective film does not have a step or have a tiny step, the frit 307 b can contact with more wide area of the protective film 306 b. In other words, if there is a large step on the protective film when the frit 307 b is in a solid state, the frit 307 b contacts with only the high portion in the protective film, that is, the portion on which the first and the second metal films are formed. However, if the upper surface of the protective film is flat, the frit 307 b contacts with the protective film 306 b contacts with both the portion on which the first and the second metal films are formed and other portions, differently from the case having the large step. Therefore, since the heat generated from the frit 307 b is transferred to larger area, the large portion of heat is transferred to the portions other than the portion on which the metal films are formed. Thus, the metal film located beneath the lower of the frit 307 b can be protected from the heat generated from the frit 307 b.
FIG. 5 is a circuit view for showing one example of a pixel in case that a flat panel display device according to an embodiment of the present invention is an organic light-emitting display device. Referring to FIG. 5, a pixel comprises an organic light emitting device (Organic Light Emitting Device: OLED), a first transistor (Thin Film Transistor:M1), a second transistor M2 and a capacitor Cst. And, a scan line Sn, a data line Dm and a power line ELVdd are connected to pixels. And, the scan line is formed in a row direction, and the data line Dm and the power line ELVdd are formed in a column direction. The first transistor M1 has a structure that a source electrode is connected to a pixel power line Vdd, a drain electrode is connected to the OLED, and a gate electrode is connected to a first node N. And, current for light-emitting is supplied to the organic light-emitting element OLED by a signal input into the gate electrode. The amount of current flowing from the source to the drain of the first transistor M1 is controlled by the data signal applied via the second transistor M2. The second transistor M2 has a structure that a source electrode is connected to the data line Dm, a drain electrode is connected to the first node N, and a gate electrode is connected to the scan line Sn, thereby performing a switching operation by a scan signal transferred via the scan line Sn and selectively transferring the data signal transferred via the data line Dm to the first node N. The capacitor Cst has a structure that a first electrode is connected to a source electrode of the first transistor M1, and a second electrode is connected to the first node N, thereby maintaining voltage applied between the source electrode and the gate electrode for a certain period by the data signal. With the above constitution, when the second transistor M2 is on by the scan signal applied to the gate electrode of the second transistor M2, the voltage corresponding to the data signal is charged in the capacitor Cst and the voltage charged in the capacitor Cst is applied to the gate electrode of the first transistor M1 so that the first transistor M1 allows the flow of current to light-emit the organic light-emitting element OLED.
US11640697 2006-01-27 2006-12-18 Flat panel display device with protective layer structure and method of making the same Active 2028-11-11 US7948177B2 (en)
KR10-2006-0008807 2006-01-27
KR20060008807A KR100688792B1 (en) 2006-01-27 2006-01-27 Flat panel display and method of the same
US20070178796A1 true US20070178796A1 (en) 2007-08-02
US7948177B2 true US7948177B2 (en) 2011-05-24
ID=37942327
US11640697 Active 2028-11-11 US7948177B2 (en) 2006-01-27 2006-12-18 Flat panel display device with protective layer structure and method of making the same
US (1) US7948177B2 (en)
JP (1) JP4486071B2 (en)
KR (1) KR100688792B1 (en)
CN (1) CN101009316B (en)
DE (1) DE602007005845D1 (en)
EP (1) EP1814160B1 (en)
US9741783B2 (en) 2013-09-03 2017-08-22 Samsung Display Co., Ltd. Display panel and organic light emitting display device comprising the same
KR101603145B1 (en) * 2009-10-15 2016-03-14 엘지디스플레이 주식회사 Method of fabricating for dual panel type organic electro-luminescent device
KR20130138615A (en) 2012-06-11 2013-12-19 삼성디스플레이 주식회사 Flat panel display device and manufacturing method thereof
JP2005078881A (en) 2003-08-29 2005-03-24 Semiconductor Energy Lab Co Ltd Luminescent display and its manufacturing method
US20070114926A1 (en) * 2005-10-31 2007-05-24 Yuuichi Kijima Image display device
US20070176552A1 (en) 2006-01-27 2007-08-02 Won Kyu Kwak Flat panel display device and method of making the same
US20070176548A1 (en) * 2006-01-27 2007-08-02 Deuk Jong Kim Organic light emitting display and method of fabricating the same
KR20030030792A (en) * 2001-10-12 2003-04-18 씨엘디 주식회사 Organic Electroluminescent Device and Method of Making the Same
An Office Action dated Oct. 29, 2009 of the Taiwan Patent Application No. 95148351.
European Search Report dated Sep. 24, 2007 from European Patent Application No. 07101243.9.
European Search Report dated Sep. 28, 2007 from corresponding European patent application No. 07101255.3 in 6 pages.
European Search Report dated Sep. 4, 2007 from European Patent Application No. 07101235.
Japanese Office Action issued May 26, 2009 for Japanese Patent Application No. 2006-232430.
Japanese Office Action issued on May 26, 2009 in the corresponding Japanese Patent Application No. 2006-232431.
Notice of Allowance issued in Korean Patent Application No. 10-2006-0008808.
Notice of Allowance issued in Korean Patent Application No. 10-2006-0008809.
Office Action dated Sep. 5, 2008 of corresponding Chinese Patent Application No. 200710007779.X with its English translation in 16 pages.
U.S. Appl. No. 11/640,581, filed Dec. 18, 2006.
U.S. Appl. No. 11/640,709, filed Dec. 18, 2006.
EP1814160A2 (en) 2007-08-01 application
DE602007005845D1 (en) 2010-05-27 grant
CN101009316B (en) 2013-08-14 grant
JP2007200853A (en) 2007-08-09 application
EP1814160B1 (en) 2010-04-14 grant
CN101009316A (en) 2007-08-01 application
KR100688792B1 (en) 2007-02-22 grant
US20070178796A1 (en) 2007-08-02 application
JP4486071B2 (en) 2010-06-23 grant
EP1814160A3 (en) 2007-10-31 application
US20040065877A1 (en) 2004-04-08 Organic el device
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