A vehicular window assembly includes a frame, a fixed window panel bonded to a lower frame portion and a movable window assembly. The active-matrix circuit is required to have a high mobility and a high ONOFF current ratio. This occurs in particular when the temperature of the area is lower than the external temperature. The doped semiconductor material can be deposited such that the facets of the intrinsic buffer semiconductor material are extended and inner sidewalls of the deposited doped semiconductor material merges in each of the source trench and the drain trench. The tool is threaded through the guide instrument working lumen. Therefore, the present invention can prevent oxidization of a given portion of WSix due to exposed WSix.