Patent ID: 9305995
Filing Date: 2016-04-05
CPC Classification: H01L

Claim Text:
1. A method comprising: forming a contact extending through a first dielectric layer on a surface of a substrate; forming a barrier structure over the contact, wherein forming the barrier structure comprises, depositing a barrier layer over the first dielectric layer and the contact, patterning the barrier layer to form the barrier structure over the contact, and depositing a second dielectric layer over the patterned barrier layer and the first dielectric layer, and planarizing the second dielectric layer to expose a top surface of the barrier structure; depositing a ferro-stack over the barrier structure, the ferro-stack including a bottom electrode layer deposited on the barrier structure and second dielectric layer, a ferroelectric layer on the bottom electrode layer and a top electrode on the ferroelectric layer; and patterning the ferro-stack to form a ferroelectric capacitor over the barrier structure, wherein the barrier layer is conductive and a bottom electrode of the ferroelectric capacitor is electrically coupled to the contact through the barrier structure.