Patent ID: 7876493

Claim:
An electrophoretic display (EPD) device, comprising: gate lines and data lines crossing each other to define a pixel region, and formed on a lower substrate; a thin film transistors (TFT) electrically connected to the gate lines and the data lines; a passivation film covering the TFT; a pixel electrode electrically connected to the TFT; a display layer formed on the pixel electrode and the passivation film, and having an electrophoretic substance; a common electrode formed on an entire surface of the display layer; an upper substrate formed on the common electrode; a seal pattern formed on each outer circumferential surface of the lower substrate, the upper substrate, and the display layer; and a dam pattern formed on the lower substrate adjacent to the seal pattern, wherein a stepped portion having a constant step from the dam pattern is provided between the passivation film and the dam pattern, wherein the dam pattern is formed by the same material as the passivation film, and wherein the stepped portion is formed by the dam pattern.