Patent ID: 8698150
Filing Date: 2014-04-15
Classification: H01L

Abstract:
1. An active device disposed in a pre-determined device region of a substrate, wherein the active device comprising: a gate comprising a plurality of first directional portions and a plurality of second directional portions, and the first directional portions and the second directional portions connected alternately to form a meandering pattern on the substrate, wherein the first directional portions are substantially parallel to one another, the second directional portions are substantially parallel to one another, and an extending direction of the first directional portions intersects an extending direction of the second directional portions; a gate insulation layer covering the gate; a semiconductor layer disposed on the gate insulation layer, the semiconductor layer disposed above the gate, and an area of the semiconductor layer substantially defining the pre-determined device region; an etching stop layer disposed on the gate insulation layer and the semiconductor layer, the etching stop layer having a first contact opening and a second contact opening both exposing the semiconductor layer and not connected with each other, the first contact opening having a plurality of first finger portions substantially parallel to the first directional portions and at least one first connecting portion connected with the first finger portions and substantially parallel to the second directional portions, and the second contact opening having a plurality of the second finger portions substantially parallel to the first directional portions and at least one second connecting portion connected with the second finger portions and substantially parallel to the second directional portions, wherein each of the first finger portions and one of the second finger portions are disposed on two sides of one of the first directional portions, respectively; a source disposed on the etching stop layer and in contact with the semiconductor layer via the first contact opening; and a drain disposed on the etching stop layer and in contact with the semiconductor layer via the second contact opening, and the source and the drain being separated from each other.