Invention Grant
- Patent Title: Methods of fabricating an F-RAM
- Patent Title (中): 制造F-RAM的方法
-
Application No.: US14738492Application Date: 2015-06-12
-
Publication No.: US09305995B1Publication Date: 2016-04-05
- Inventor: Shan Sun
- Applicant: Cypress Semiconductor Corporation
- Applicant Address: US CA San Jose
- Assignee: CYPRESS SEMICONDUCTOR CORPORATION
- Current Assignee: CYPRESS SEMICONDUCTOR CORPORATION
- Current Assignee Address: US CA San Jose
- Main IPC: H01L21/00
- IPC: H01L21/00 ; H01L49/02 ; H01L27/115

Abstract:
Methods of forming F-RAM cells are described. The method includes forming a contact extending through a first dielectric layer on a surface of a substrate. A barrier structure is formed over the contact by depositing and patterning a barrier layer. A second dielectric layer is deposited over the patterned barrier layer and planarized to expose a top surface of the barrier structure. A ferro-stack is deposited and patterned over the barrier structure to form a ferroelectric capacitor. A bottom electrode of the ferroelectric capacitor is electrically coupled to the diffusion region of the MOS transistor through the barrier structure. The barrier layer is conductive so that a bottom electrode of the ferroelectric capacitor is electrically coupled to the contact through the barrier structure. In one embodiment, patterning barrier layer comprises concurrently forming a local interconnect (LI) on a top surface of the first dielectric layer.
Information query
IPC分类: