Patent ID: 9698154
Date: 2017-07-04
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising: a substrate including a cell region, a peripheral circuit region, and a boundary region, a plurality of memory cell arrays on the cell region, and an air gap structure including a trench formed in the boundary region of the substrate, the air gap structure defining an air gap, wherein the air gap structure includes one of a first air gap structure that is continuous, without being disconnected, to correspond to all of the plurality of memory cell arrays, the first air gap structure extending along sides of the plurality of memory cell arrays in a single direction, a second air gap structure that includes a plurality of trenches that include the trench and are spaced apart from each other while having linear forms, a third air gap structure that has a zigzag form when viewed from above, and a fourth air gap structure that has a ladder form when viewed from above.