Patent ID: 8754470
Filing Date: 2014-06-17
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate having a first area and a second area; a plurality of protrusion structures disposed over the substrate; an isolation feature disposed on the substrate, wherein in the first area, each protrusion structures is isolated from each other by the isolation feature, and wherein in the second area, there are more than one protrusion structures between adjacent isolation features; a drain region disposed over in the first area, where the drain region associating with the respective protrusion structures is separated from the drain region associated with the adjacent protrusion structures by the isolation feature, and in the second area where the drain regions associating with respective protrusion structures are connected to each other; a gate stack disposed over the first area, where the gate stack associating with the respective protrusion structure is separated from the gate stack associating with the adjacent protrusion structure, and over the second area, where the gate associating with protrusion structures are connected to each other; a source region at a top portion of the protrusion structure; and a series connection in the first area and a parallel connection in the second area.