Samsung Electronics Co., Ltd.

Chan Jae Ahn

Sung Woo Hong

Sung Won Choi

A Ra Jo

Byung Hee Sohn

Sun Jin Song

Won Suk Chang

Woo-Jin Bae

Jae Wook Nam

Semi Lee

A method of preparing an optical film, preparing a coating composition including an amic acid-containing polymer represented by Chemical Formula 1 and at least one polymerization aid selected from an alkyl phosphite, an aryl phosphite, an alkyl phosphate, and an aryl phosphate; providing the coating composition on a substrate to form a coating layer; and applying heat to the coating layer to prepare a cured film: wherein, in Chemical Formula 1, are the same or different in each repeating unit, and are each independently at least one selected from an aromatic organic group, an aliphatic organic group, and an alicyclic organic group, and 0&#x2266;x&#x2266;1.

Optical film and method of preparing optical film

A slot die includes a material distribution chamber configured to distribute a casting solution supplied to the material distribution chamber, and a lip in which a slot including an expansion portion is defined and through which the casting solution distributed in the material distribution chamber is discharged, where a width of the expansion portion taken in a first direction is expanded from one side of the expansion portion to a lip end facing the one side and the one side of the expansion portion is apart from the lip end by a predetermined length taken along a second direction which is perpendicular to the first direction and substantially parallel to a flow direction of the casting solution.

Slot die for film manufacturing

Growing community of inventors

Hwaseong-si, South Korea

Chan Jae Ahn