Samsung Display Co., Ltd.

Dongwoo Fine-chem Co., Ltd.

Giyong Nam

Youngjin Yoon

Daesung Lim

Youngchul Park

Sangtae Kim

Kyungbo Shim

Kitae Kim

Jong-Hyun Choung

Changsoo Kim

Hongsick Park

Seon-Il Kim

In-Bae Kim

Jonghee Park

Jinseock Kim

Beomsoo Kim

Jinhyung Kim

Inseol Kuk

Inho Yu

Haccheol Kim

Byungsu Lee

Jungseek Jung

Dongki Kim

Joohwan Chung

Suckjun Lee

Jinsook Kim

Sanghoon Jang

A thin film etchant composition for preventing re-adsorption of an etched metal and uniformly etching a thin film is provided. The thin film etchant composition includes about 43 wt % to about 46 wt % of phosphoric acid, about 5 wt % to about 8 wt % of nitric acid, about 10 wt % to about 17 wt % of acetic acid, about 1 wt % to about 3 wt % of iron nitrate, about 0.7 wt % to about 1.5 wt % of phosphate, and deionized water as a remaining amount based on a total weight of the thin film etchant composition.

Thin film etchant composition and method of forming metal pattern by using the same

An etchant includes: based on a total weight of the etchant, about 1 wt % to about 15 wt % of sulfurized peroxide, about 5 wt % to about 10 wt % of nitric acid, about 20 wt % to about 40 wt % of organic acid, about 0.05 wt % to about 5 wt % of ferric nitrate, about 0.1 wt % to about 5 wt % of ionic sequestrant, and 0.1 wt % to 5 wt % of corrosion inhibitor, wherein a remaining amount is deionized water.

Etchant and method of manufacturing display device by using the same

An etchant includes, based on a total amount of the etchant, from about 0.5 to about 20 wt % of a persulfate, from about 0.01 to about 2 wt % of a fluorine compound, from about 1 to about 10 wt % of an inorganic acid, from about 0.5 to about 5 wt % of an azole compound, from about 0.1 to about 5 wt % of an electron-donating compound, from about 0.1 to about 5 wt % of a chlorine compound, from about 0.05 to about 3 wt % of a copper salt, from about 0.1 to about 10 wt % of an organic acid or an organic acid salt, and a remaining amount of water.

Etchant and method for manufacturing display device using the same

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Yongin-si, South Korea

Giyong Nam