IP Library Patent Application 10993202
Patent Application
App. No. 10/993,202

Reference cell configuration for a 1T/1C ferroelectric memory

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Quick Facts
Patent No.
US None
App. No.
10/993,202
Abstract

A reference cell layout for use in a 1T/1C ferroelectric memory array includes a transistor of a first polarity type having a gate coupled to a reference word line and a current path coupled between a bit line and an internal cell node, a transistor of a second polarity type having a gate coupled to a pre-charge line and a current path coupled between a source of power supply voltage and the internal cell node, a shunt reference word line extending across the reference cell that is electrically isolated from the reference word line, the pre-charge line and the transistors within the physical boundary of the memory cell, and a ferroelectric capacitor coupled between the internal cell node and a reference plate line.

Claims (5)

1 . A reference cell configuration for a 1T/1C ferroelectric memory comprising:

first, second, third and fourth sequentially-coupled reference cell portions, wherein a first reference cell portion includes a plate reference line;

a second reference cell portion includes a precharge line;

a third reference layout portion comprises a copy of the second reference cell portion reversed in the column direction; and

a fourth reference cell portion comprises a copy of the first reference cell portion reversed in the row and column directions.

Assignments (5)
RELEASE OF SECURITY INTEREST Recorded Dec 22, 2016
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: CYPRESS SEMICONDUCTOR CORPORATION; SPANSION LLC
Reel/Frame 041178/0061 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 14, 2016
From: CYPRESS SEMICONDUCTOR CORPORATION
To: MONTEREY RESEARCH, LLC
Reel/Frame 040908/0979 →
RELEASE OF SECURITY INTEREST Recorded Oct 27, 2016
From: NATIONAL ELECTRICAL BENEFIT FUND
To: CYPRESS SEMICONDUCTOR CORPORATION
Reel/Frame 040148/0623 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 27, 2016
From: NATIONAL ELECTRICAL BENEFIT FUND
To: CYPRESS SEMICONDUCTOR CORPORATION
Reel/Frame 040152/0435 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 18, 2005
From: ALLEN, JUDITH E.; WILSON, DENNIS R.; KRAUS, WILLIAM F.; LEHMAN, LARK E.
To: RAMTRON INTERNATIONAL CORPORATION
Reel/Frame 015746/0678 →