Patent ID: 8093593

Claim:
A semiconductor device comprising: a crystalline semiconductor film comprising: a plurality of rectangular semiconductor regions disposed in parallel, wherein each of the plurality of rectangular semiconductor regions has a first edge and a second edge; and a pair of semiconductor regions, wherein one of the pair of semiconductor regions is connected to each of the first edges and the other of the pair of semiconductor regions is connected to each of the second edges; and an electrode crossing over the plurality of rectangular semiconductor regions with an insulating film interposed therebetween, wherein each of the plurality of rectangular semiconductor regions has a top surface and side surfaces, wherein a channel forming region is formed in a portion of each of the plurality of rectangular semiconductor regions which is overlapped with the electrode, wherein a crystal of the crystalline semiconductor film extends along a channel length direction, wherein the plurality of rectangular semiconductor regions are provided with an interval therebetween and the interval between directly adjacent rectangular semiconductor regions is twice or more a channel width of the each of the plurality of rectangular semiconductor regions, wherein portions of the electrode extend below the top surface of each of the plurality of rectangular semiconductor regions and the insulating film interposed therebetween is provided between one of the side surfaces of one of the plurality of rectangular semiconductor regions and one of the side surfaces of another of the plurality of rectangular semiconductor regions, and wherein the plurality of rectangular semiconductor regions have a width larger than a height of the plurality of rectangular semiconductor regions in a cross sectional view.