Patent ID: 7547919

Claim:
A liquid crystal display (LCD) device, comprising: a buffer layer formed on a substrate, wherein the buffer layer is formed of a silicon nitride film that is a heat conductive material; an active layer, having at least one opening, formed on the buffer layer; a heat releasing part formed in the opening; a first insulating layer formed on the buffer layer and the active layer; a gate line formed on the first insulating layer in a width direction of the active layer; a second insulating layer formed on the first insulating layer and the gate line; at least one heat releasing path formed in the heat releasing part, wherein the heat releasing path is formed in the first and second insulating layers to expose the buffer layer; contact holes formed in the first and second insulating layers; source and drain electrodes formed on the second insulating layer along opposing sides of the active layer through the contact holes to connect with the active layer; and a passivation layer formed on the source and drain electrodes to be directly connected with the buffer layer through the heat releasing path, wherein the passivation layer is formed of a silicon nitride film.