Invention Grant
- Patent Title: Ferroelectric random-access memory with pre-patterned oxygen barrier
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Application No.: US14970063Application Date: 2015-12-15
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Publication No.: US09646976B2Publication Date: 2017-05-09
- 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 ; H01L27/11507 ; H01L49/02

Abstract:
Structure of F-RAM cells are described. The F-RAM cell include 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.
Public/Granted literature
- US20160351577A1 FERROELECTRIC RANDOM-ACCESS MEMORY WITH PRE-PATTERNED OXYGEN BARRIER Public/Granted day:2016-12-01
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