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Researchers Submit Patent Application, "Thin-Film Deposition Mask, Method of Fabricating the Same, and Method of Fabricating an Organic Light...

August 28, 2014



Researchers Submit Patent Application, "Thin-Film Deposition Mask, Method of Fabricating the Same, and Method of Fabricating an Organic Light Emitting Display Apparatus Using the Same", for Approval

By a News Reporter-Staff News Editor at Politics & Government Week -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventor KANG, Tae-Wook (Yongin-City, KR), filed on July 24, 2013, was made available online on August 14, 2014.

No assignee for this patent application has been made.

News editors obtained the following quote from the background information supplied by the inventors: "Embodiments relate to a thin-film deposition mask, a method of fabricating the same, and a method of fabricating an organic light-emitting display apparatus using the same.

"An organic light-emitting display apparatus, which may include a thin-film transistor (TFT), may be used as a display apparatus in mobile devices such as digital cameras, video cameras, camcorders, mobile information terminals, or smartphones, or electronic devices such as an ultra-thin television, an ultra-slim notebook, a tablet personal computer (PC), or a flexible display apparatus."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventor's summary information for this patent application: "Embodiments are directed to a thin-film deposition mask, including a mask body, the mask body having a first surface and a second surface that is an opposite surface of the first surface, the mask body having a plurality of deposition holes therein, and a spacer near the deposition holes, the spacer protruding from the first surface of the mask body in a vertical direction.

"The deposition holes may be formed in an area of the mask body that corresponds vertically to a plurality of sub-pixels disposed on a substrate on which a deposition material is deposited.

"The first surface of the mask body may face the substrate, and the spacer may protrude toward the substrate.

"The spacer may include one or more of a discontinuous linear bar, an inclined bar, a curved bar, or an oval bar. The spacer may be located near a sub-pixel.

"The spacer may be a continuous linear bar. The spacer may be located along an edge of a sub-pixel.

"The spacer may have a height of 1 to 10 micrometers.

"The spacer may be formed as one body with the mask body.

"The mask may be formed of an Invar material.

"Embodiments are also directed to a method of fabricating a thin-film deposition mask, the method including preparing a mask body, the mask body having a first surface that faces a substrate on which a deposition material is deposited, and a second surface that is an opposite surface to the first surface, forming a first photoresist pattern on the mask body, forming a spacer by firstly etching the mask body, forming a second photoresist pattern on the mask body, and forming a plurality of deposition holes by secondly etching the mask body.

"The forming of the first photoresist pattern may include selectively forming a first pattern layer in an area in which the spacer is to be formed on the first surface of the mask body, and forming a second pattern layer on the entire second surface of the mask body.

"The spacer may protrude from the first surface of the mask body as one body towards the substrate.

"The spacer may be formed to have a height of 1 to 10 micrometers.

"The forming of the second photoresist pattern may include selectively forming a third pattern layer, which covers the spacer, on the first surface of the mask body, and forming a fourth pattern layer on the second surface of the mask body, and an opening may be formed on the first surface of the mask body, except for an area in which the third pattern layer is formed, and an opening may be formed on the second surface of the mask body, except for an area in which the fourth pattern layer is formed, the openings being located in an area where the openings correspond to each other in a vertical direction of the mask body.

"A plurality of the openings may be formed in an area that corresponds to a plurality of sub-pixels disposed on the substrate on which the deposition material is deposited, in a vertical direction of the mask body.

"Embodiments are also directed to a method of fabricating an organic light-emitting display apparatus, the method including forming a first electrode on a substrate, forming an insulating layer, which covers an edge of the first electrode, on the first substrate, aligning a mask, from which a plurality of spacers protrude, on the substrate, and contacting the spacer on the insulating layer, forming an organic emissive layer on the first electrode, the forming of the organic emissive layer including passing an organic emissive layer organic emissive layer material through a deposition hole in the mask, forming a second electrode on the organic emissive layer, and forming a sealing layer on the second electrode.

"The spacer may be located on the insulating layer along an edge of a sub-pixel in which the organic emissive layer is formed.

"The spacer may be located between adjacent sub-pixels.

"The spacer may be selectively located at a point where a plurality of sub-pixels cross each other.

"A spacer may be located at every point where at least two sub-pixels, which are arranged in a first or a second direction of the substrate, cross each other.

"A spacer may be located at a point between sub-pixels, which are arranged in a first or a second direction of the substrate, in a zigzag pattern.

BRIEF DESCRIPTION OF THE DRAWINGS

"The above and other features and advantages will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings in which:

"FIG. 1 is a cross-sectional view of a sub-pixel of an organic light-emitting display apparatus, according to an example embodiment;

"FIG. 2 is a configuration map illustrating an organic light-emitting diode (OLED) of FIG. 1;

"FIG. 3 is a partially-sectioned cross-sectional view illustrating a deposition mask, according to an example embodiment;

"FIGS. 4A through 4D are diagrams illustrating stages in a process of fabricating the deposition mask, according to an example embodiment;

"FIGS. 5A through 5D are diagrams sequentially illustrating stages in a process of fabricating the organic light-emitting display apparatus, according to an example embodiment;

"FIG. 6 is a plan view illustrating a location of a spacer on the substrate, according to an example embodiment;

"FIG. 7 is a plan view illustrating a location of a spacer on the substrate, according to another example embodiment;

"FIG. 8 is a plan view illustrating a location of a spacer on the substrate, according to another example embodiment; and

"FIG. 9 is a plan view illustrating a location of a spacer on the substrate, according to another example embodiment."

For additional information on this patent application, see: KANG, Tae-Wook. Thin-Film Deposition Mask, Method of Fabricating the Same, and Method of Fabricating an Organic Light Emitting Display Apparatus Using the Same. Filed July 24, 2013 and posted August 14, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=2911&p=59&f=G&l=50&d=PG01&S1=20140807.PD.&OS=PD/20140807&RS=PD/20140807

Keywords for this news article include: Patents.

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Source: Politics & Government Week


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