Patent ID: 9449977
Filing Date: 2016-09-20
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising: a substrate; a plurality of storage nodes on the substrate and extending in a vertical direction relative to the substrate, the storage nodes each having a height in the vertical direction between a bottom and a top of the storage node; a lower support pattern in contact with the storage nodes between the bottom and the top of the plurality of storage nodes, the lower support pattern spaced apart from the substrate in the vertical direction; an upper support pattern in contact with the storage nodes above the lower support pattern relative to the substrate, the upper support pattern spaced apart from the lower support pattern in the vertical direction; wherein the lower support pattern is positioned at a position in the vertical direction that is greater than or equal to a half of the height of the storage nodes, wherein the lower support pattern has the substantially same shape as the upper support pattern in plan view; wherein the lower support pattern has a first maximum thickness in the vertical direction; and wherein the upper support pattern has a second maximum thickness in the vertical direction that is greater than the first maximum thickness of the lower support pattern, and wherein the upper support pattern has a lower surface that is substantially flat and an upper surface that is substantially wavy.