Source: http://www.google.com/patents/US7692186?ie=ISO-8859-1
Timestamp: 2014-10-23 03:16:59
Document Index: 592300385

Matched Legal Cases: ['Application No. 200310003108', 'Application No. 200810168723', 'Application No. 2003', 'Application No. 03000099', 'Application No. 200504853', 'Application No. 092101383']

Patent US7692186 - Light emitting device and method of manufacturing the same - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsTo provide a light emitting device high in reliability with a pixel portion having high definition with a large screen. According to a light emitting device of the present invention, on an insulator (24) provided between pixel electrodes, an auxiliary electrode (21) made of a metal film is formed, whereby...http://www.google.com/patents/US7692186?utm_source=gb-gplus-sharePatent US7692186 - Light emitting device and method of manufacturing the sameAdvanced Patent SearchPublication numberUS7692186 B2Publication typeGrantApplication numberUS 11/623,618Publication dateApr 6, 2010Filing dateJan 16, 2007Priority dateJan 24, 2002Fee statusPaidAlso published asCN1434668A, CN100438063C, CN101369634A, CN101369634B, CN102214796A, EP1331666A2, EP1331666A3, EP2509109A2, EP2509109A3, US6781162, US7265391, US8089066, US8779467, US20030137325, US20050012105, US20070114921, US20100230664, US20120097994Publication number11623618, 623618, US 7692186 B2, US 7692186B2, US-B2-7692186, US7692186 B2, US7692186B2InventorsShunpei Yamazaki, Masaaki Hiroki, Masakazu Murakami, Hideaki KuwabaraOriginal AssigneeSemiconductor Energy Laboratory Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (63), Non-Patent Citations (8), Referenced by (10), Classifications (18), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetLight emitting device and method of manufacturing the sameUS 7692186 B2Abstract To provide a light emitting device high in reliability with a pixel portion having high definition with a large screen. According to a light emitting device of the present invention, on an insulator (24) provided between pixel electrodes, an auxiliary electrode (21) made of a metal film is formed, whereby a conductive layer (20) made of a transparent conductive film in contact with the auxiliary electrode can be made low in resistance and thin. Also, the auxiliary electrode (21) is used to achieve connection with an electrode on a lower layer, whereby the electrode can be led out with the transparent conductive film formed on an EL layer. Further, a protective film (32) made of a film containing hydrogen and a silicon nitride film which are laminated is formed, whereby high reliability can be achieved.
12. The method claimed in claim 7, further comprising the step of forming a color filter array above the transparent electrode. Description
Embodiment 1 In this embodiment, the active matrix type light emitting device formed on the insulating surface is described. As an active element, a thin film transistor is used (hereinafter referred to as TFT) here, a MOS transistor may also be used.
Next, the resist mask is removed for the first doping treatment to dope with the entire surface using the gate electrodes as masks. The first doping treatment employs ion doping or ion implantation. Here, ion doping conditions are that the dose is set to 1.5�1014 atoms/cm2, and the acceleration voltage is set from 60 to 100 keV. As an impurity elements that imparts the n-type conductivity, phosphorus (P) or arsenic (As) is typically used. The first impurity regions (n− region) are formed in a self-aligning manner.
The concentration of the impurity element that imparts the p-type conductivity is set from 1�1020 to 1�1021 atoms/cm3 to add to the fourth impurity regions. The fourth impurity regions being region (n− region) are already doped with phosphorus (P) in the previous step but are doped with the impurity element that imparts the p-type conductivity in a concentration 1.5 to 3 times the phosphorus concentration to obtain the p-type conductivity. Here, a region having the same concentration range as the fourth impurity regions is also called a p+ region.
Also, it is assumed as being preferable that as a material for the cathode, metals having a low work function (typically, metal elements belonging to Group 1 or Group 2 in the periodic table) or alloys containing these are used. As the work function becomes lower, the light emission efficiency becomes higher. Thus, in particular, it is desirable that a material with a laminate structure is used as the material for the cathode, which is obtained by depositing an alloy of MgAg, MgIn, AlLi etc. into a thin film or forming a thin film through coevaporation of aluminum and an element belonging to Group 1 or 2 in the periodic table, and subsequently forming a transparent conductive film (an alloy of an indium oxide and a tin oxide (ITO), an alloy of an indium oxide and a zinc oxide (In2O3�ZnO), an zinc oxide (ZnO), and the like).
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