Lg Chem, Ltd

Jung Hyun Yeo

Moon Soo Park

Ye Hoon Im

Kyung Ki Hong

Seung Hun Chae

Won Chan Park

Yong Il Cho

Sang Seop Kim

The present application relates to a slot die coating apparatus and, more particularly, to a slot die coating apparatus which can ensure the coating stability of a substrate film by reducing pressure oscillations within a vacuum chamber when slot die coating is carried out. The slot die coating apparatus according to the present application can effectively dampen pressure oscillations within a vacuum chamber by connecting a pressure oscillation reducing tank to the vacuum chamber and thus can ensure the coating stability of a substrate film, resulting in a reduction in the proportion of defective products.

Slot die coating apparatus

Provided is an optical filter and a display device. In the optical filter, patterns of first and second regions therein may be stably maintained, and therefore the optical filter capable of ensuring excellent light division characteristics for a long time may be provided.

Optical filter

Growing community of inventors

Cheongju-si, South Korea

Jung Hyun Yeo