Patent ID: 9379116
Filing Date: 2016-06-28
CPC Classification: H01L

Claim Text:
1. A method comprising: forming a buffer layer between a top pad layer and a bottom pad layer, the bottom pad layer being on top of a deep trench capacitor embedded in a substrate; forming a fin pattern above the top pad layer using a sidewall image transfer technique, the fin pattern is defined by one or more sidewall spacers, such that at least one of the one or more sidewall spacers is directly above and aligned with at least a portion of the deep trench capacitor; transferring the fin pattern into the top pad layer stopping of the buffer layer; and forming a fin in direct contact with a strap by transferring the fin pattern into the buffer layer, into the bottom pad layer, and into the substrate and an inner electrode of the deep trench capacitor, the fin is formed from a portion of the substrate and the strap is formed from a portion of an inner electrode of the deep trench capacitor.