Patent ID: 7864257

Claim:
A thin film transistor comprising: first and second ohmic contact layers formed on an insulating substrate; an activation layer formed on the insulating substrate and the first and second ohmic contact layers; an insulating layer formed on the activation layer; a source electrode formed on the insulating layer and electrically connected to the first ohmic contact layer through a first contact hole, the first contact hole extending through the activation layer and the insulating layer to the first ohmic contact layer; a drain electrode formed on the insulating layer and electrically connected to the second ohmic contact layer through a second contact hole, the second contact hole extending through the activation layer and the insulating layer to the second ohmic contact layer; a gate electrode formed on the insulating layer between the source electrode and the drain electrode and overlapping the activation layer; and a protective layer formed on the source electrode, the drain electrode, and the gate electrode.