Metal plate

a technology of metal plates and rolled metals, applied in the field of metal plates, can solve the problems of reducing affecting the luminous efficiency of the organic el display device, so as to reduce the dimensional precision of each pixel and the positional precision of the pixel

US20180010231A1Inactive Publication Date: 2018-01-11DAI NIPPON PRINTING CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Publication Date
2018-01-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The object of the present invention is to provide a metal plate capable of manufacturing a deposition mask in which dispersion of positions of through-holes is restrained. A thermal recovery rate is defined as parts per million of a difference a distance between to measurement points on a sample before a heat treatment and a distance therebetween after the heat treatment, relative to the distance therebetween before the heat treatment. In this case, an average value of the thermal recovery rates of the respective samples is not less than −10 ppm and not more than +10 ppm, and (2) a dispersion of the thermal recovery rates of the respective samples is not more than 20 ppm.
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Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation of U.S. application Ser. No. 15 / 026,009, filed Mar. 30, 2016, which in turn is the National Stage of International Application No. PCT / 3P2014 / 075168, filed Sep. 24, 2014, the entireties of which are incorporated herein by reference.FIELD OF THE INVENTION

[0002] The present invention relates to a metal plate for use in manufacturing a deposition mask with a plurality of through-holes formed therein. In addition, the present invention relates to a method of manufacturing the metal plate. In addition, the present invention relates to a method of manufacturing the mask with a plurality of through-holes formed therein, by use of the metal plate.BACKGROUND OF THE INVENTION

[0003] A display device used in a portable device such as a smart phone and a tablet PC is required to have high fineness, e.g., an image density not less than 300 ppi. In addition, there is increasing demand that the portable device is applicab...

Examples

examples

[0170]Next, although the present invention is described in more detail referring to examples, the present invention is not limited to the below examples as long as it departs from the scope of the present invention.

First Winding body and First Sample

[0171]Firstly, by performing the aforementioned rolling step, the slitting step, the annealing step and the cutting step were performed to the base metal made of the invar alloy, a winding body (first winding body) around which an elongated metal plate was wound was manufactured.

[0172]To be specific, a first rolling step, in which a first hot rolling step and a first cold rolling step were performed in this order, was firstly performed. Then, a first slitting step, in which both ends in the width direction of the elongated metal plate were slit over a range of not less than 3 mm and not more than 5 mm, respectively, was performed. Thereafter, a first annealing step, in which the elongated metal plate was continuously annealed at 500° C. ...