Samsung Display Co., Ltd.

Dongwoo Fine-chem Co., Ltd.

Soomin An

Youngjun Kim

Mugyeom Kim

Sunghoon Kim

Hongsick Park

Changyong Jeong

Youngchul Park

Daesung Lim

Beunghwa Jeong

Inho Yu

Inseol Kuk

Seungsoo Lee

Jongmun Lee

An etchant composition includes an etchant composition that includes about 0.5 wt % to about 20 wt % of persulfate, about 0.01 wt % to about 2 wt % of a fluorine compound, about 1 wt % to about 10 wt % of an inorganic acid, about 0.5 wt % to about 5 wt % of a cyclic amine compound, about 0.1 wt % to about 5 wt % of a chlorine compound, about 0.1 wt % to about 10 wt % of an aliphatic sulfonic acid, about 1 wt % to about 20 wt % of an organic acid or an organic acid salt, and water based on a total weight of the etchant composition.

Etchant composition and method of manufacturing a thin film transistor substrate by using the same

A display apparatus includes a support substrate, a flexible substrate, and a display unit. The flexible substrate overlaps the support substrate and includes a first portion, a second portion, and a flexible part between the first portion and the second portion. The flexible part includes an uneven surface. The uneven surface includes protrusions, recesses, and/or openings of through holes. The display unit overlaps the first portion.

Display apparatus with flexible substrate

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Yongin-si, South Korea

Soomin An