US5822240A
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Ferroelectric random access memory circuits and structures for preventing ferroelectric capacitors from memory failure
Assignee: Samsung Electronics Co Ltd
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Filing: 1995-10-30
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Granted: 1998-10-13
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Expires: 2015-10-30
Abstract
Abstract A novel ferroelectric random access memory structure which comprises a capacitor consisting of upper and lower plane electrodes and a ferroelectric inserted therebetween, and a transistor comprising a means of inducing the capacitor to polarization and maintaining it, connected with at least one of the electrodes, wherein the electric potential of the upper electrode is equalized with that of the lower electrode, thereby preventing the polarization reversal caused by pyroelectric charges.
Inventors
- 👤 In-kyung Yoo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:02
CPC Classifications
H; H01; H01G; H01G4/00; G; G11; G11C; G11C11/00; G11C11/21; G11C11/22
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
69 words
A ferroelectric random access memory structure comprising: a capacitor consisting of upper and lower plane electrodes having a ferroelectric inserted therebetween, and a transistor for inducing and maintaining polarization in the capacitor, said transistor connected to at least one of the electrodes, wherein the electric potential of said upper electrode is equalized with that of said lower electrode, to prevent polarization reversal of the capacitor caused by pyroelectric charges.
Claim 2
Dependent Claim
69 words
A ferroelectric random access memory structure comprising: a capacitor consisting of upper and lower plane electrodes having a ferroelectric inserted therebetween, and a transistor for inducing and maintaining polarization in the capacitor, said transistor connected to at least one of the electrodes, wherein the electric potential of said upper electrode is equalized with that of said lower electrode, to prevent polarization reversal of the capacitor caused by pyroelectric charges.
Claim 3
Dependent Claim
24 words
The ferroelectric random access memory structure in accordance with claim 1, wherein said upper and lower electrodes each are grounded to remove pyroelectric charges.
Claim 4
Dependent Claim
23 words
The ferroelectric random access memory structure in accordance with claim 1, wherein said upper and lower electrodes are electrically interconnected with each other.
Claim 5
Dependent Claim
28 words
The ferroelectric random access memory structure in accordance with claim 1, wherein said upper and lower electrodes are electrically interconnected with each other and the interconnection is grounded.
Claim 6
Dependent Claim
53 words
The ferroelectric random access memory structure in accordance with claim 1, wherein said upper and lower electrodes are electrically floated so as not to lose pyroelectric charges on any of said electrodes when the type and amount of pyroelectric charges generated in said upper electrode are similar to those in said lower electrode.
Claim 7
Dependent Claim
72 words
A circuit using a ferroelectric random access memory structure comprising: a capacitor consisting of upper and lower plane electrodes having a ferroelectric inserted therebetween, and a transistor for inducing and maintaining polarization in the capacitor, said transistor connected to at least one of the electrodes, wherein the electric potential of said upper electrode is equalized with that of said lower electrode, to prevent polarization reversal of the capacitor caused by pyroelectric charges.
Claim 8
Dependent Claim
72 words
A circuit using a ferroelectric random access memory structure comprising: a capacitor consisting of upper and lower plane electrodes having a ferroelectric inserted therebetween, and a transistor for inducing and maintaining polarization in the capacitor, said transistor connected to at least one of the electrodes, wherein the electric potential of said upper electrode is equalized with that of said lower electrode, to prevent polarization reversal of the capacitor caused by pyroelectric charges.
Claim 9
Dependent Claim
20 words
The circuit in accordance with claim 6, wherein said upper and lower electrodes each are grounded to remove pyroelectric charges.
Claim 10
Dependent Claim
19 words
The circuit in accordance with claim 6, wherein said upper and lower electrodes are electrically interconnected with each other.
Claim 11
Dependent Claim
24 words
The circuit in accordance with claim 6, wherein said upper and lower electrodes are electrically interconnected with each other and the interconnection is grounded.
Claim 12
Dependent Claim
49 words
The circuit in accordance with claim 6, wherein said upper and lower electrodes are electrically floated so as not to lose pyroelectric charges on any of said electrodes when the type and amount of pyroelectric charges generated in said upper electrode are similar to those in said lower electrode.
Claim 13
Dependent Claim
71 words
A circuit using a ferroelectric random access memory comprising: a capacitor consisting of upper and lower plane electrodes having a ferroelectric inserted therebetween, and a diode for inducing and maintaining polarization in the capacitor, said diode connected to at least one of the electrodes, wherein the electric potential of said upper electrode is equalized with that of said lower electrode, to prevent polarization reversal of the capacitor caused by pyroelectric charges.
Claim 14
Dependent Claim
71 words
A circuit using a ferroelectric random access memory comprising: a capacitor consisting of upper and lower plane electrodes having a ferroelectric inserted therebetween, and a diode for inducing and maintaining polarization in the capacitor, said diode connected to at least one of the electrodes, wherein the electric potential of said upper electrode is equalized with that of said lower electrode, to prevent polarization reversal of the capacitor caused by pyroelectric charges.
Claim 15
Dependent Claim
20 words
The circuit in accordance with claim 11, wherein said upper and lower electrodes each are grounded to remove pyroelectric charges.
Claim 16
Dependent Claim
19 words
The circuit in accordance with claim 11, wherein said upper and lower electrodes are electrically interconnected with each other.
Claim 17
Dependent Claim
24 words
The circuit in accordance with claim 11, wherein said upper and lower electrodes are electrically interconnected with each other and the interconnection is grounded.
Claim 18
Dependent Claim
49 words
The circuit in accordance with claim 11, wherein said upper and lower electrodes are electrically floated so as not to lose pyroelectric charges on any of said electrodes when the type and amount of pyroelectric charges generated in said upper electrode are similar to those in said lower electrode.
References Cited (Backward Citations)
US5119329A
Cited
US5506748A
Cited
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