WO2001024275A1 - Ferroelektrischer transistor und dessen verwendung in einer speicherzellenanordnung - Google Patents
Ferroelektrischer transistor und dessen verwendung in einer speicherzellenanordnung Download PDFInfo
- Publication number
- WO2001024275A1 WO2001024275A1 PCT/DE2000/003468 DE0003468W WO0124275A1 WO 2001024275 A1 WO2001024275 A1 WO 2001024275A1 DE 0003468 W DE0003468 W DE 0003468W WO 0124275 A1 WO0124275 A1 WO 0124275A1
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- region
- dielectric layer
- ferroelectric
- source
- channel region
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- 230000015654 memory Effects 0.000 title claims abstract description 12
- 230000010287 polarization Effects 0.000 claims abstract description 53
- 239000000758 substrate Substances 0.000 claims abstract description 17
- 239000004065 semiconductor Substances 0.000 claims abstract description 15
- 229910020684 PbZr Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 description 12
- 230000005684 electric field Effects 0.000 description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 238000000151 deposition Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- 238000013528 artificial neural network Methods 0.000 description 1
- 238000013523 data management Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000028161 membrane depolarization Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
- H01L27/10—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a repetitive configuration
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/51—Insulating materials associated therewith
- H01L29/516—Insulating materials associated therewith with at least one ferroelectric layer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
- H01L27/10—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a repetitive configuration
- H01L27/105—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a repetitive configuration including field-effect components
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/78391—Field effect transistors with field effect produced by an insulated gate the gate comprising a layer which is used for its ferroelectric properties
Definitions
- Ferroelectric transistor and its use in a memory cell arrangement are Ferroelectric transistor and its use in a memory cell arrangement.
- Ferroelectric materials have been examined for their suitability for storage applications for some time. Two variants are mainly considered. On the one hand, ferroelectric material can act as a dielectric layer with a high dielectric constant in a capacitor
- ferroelectric transistors have been proposed (see, for example, EP 0566 585 Bl; HN Lee et al, Ext. Abstr. Int. Conf. SSDM, Hamatsu, 1997, pp. 382-383; IP Han et al, Integrated Ferroelectrics, 1998, Vol. 22, pp. 213-221), which have two source-drain regions, a channel region and a gate electrode, a layer of ferroelectric material being provided between the gate electrode and the channel region.
- the conductivity of these transistors depends on the polarization state of the layer made of ferroelectric material.
- Such ferroelectric transistors are suitable for use in non-volatile memories. Two different logical values of digital information are assigned to two different polarization states of the layer made of ferroelectric material. Further possible uses for such ferroelectric transistors are e.g. B. neural networks.
- ferroelectric material which is arranged on the surface of a semiconductor substrate, exhibits poor interface properties which have a negative influence on the electrical properties of a ferroelectric transistor, it has been proposed to place an intermediate layer made of SiO 2 in a ferroelectric transistor between the ferroelectric layer and the semiconductor substrate (see EP
- the ferroelectric layer is polarized between the gate electrode and the semiconductor substrate acting as an electrode.
- the invention is therefore based on the problem of specifying a ferroelectric transistor in which breakdown of a dielectric layer which is arranged between a ferroelectric layer and a semiconductor substrate is avoided.
- ferroelectric transistor according to claim 1. Further developments of the invention emerge from the remaining claims.
- the ferroelectric transistor is particularly suitable for use as a memory cell in a memory cell arrangement.
- the ferroelectric transistor comprises a first source-drain region, a channel region and a second source-dram region, which adjoin a main surface of a semiconductor substrate.
- the channel area is arranged between the first source-dram area and the second source-dra area.
- a dielectric layer is provided which covers at least the surface of the channel region and which overlaps the surface of the first source-dram region.
- a ferroelectric layer is arranged on the surface of the dielectric layer and covers at least a part of the first source-dram region adjoining the channel region.
- a first polarization electrode and a second polarization electrode are also arranged on the surface of the dielectric layer, between which the ferroelectric
- a gate electrode is arranged on the surface of the dielectric layer above a region of the first channel region.
- the thickness of the dielectric layer is smaller above the first region, ie below the gate electrode, than above a second region of the channel region, which is arranged below the second polarization electrode.
- the thickness of the dielectric layer above that part of the first source-dram region which is adjacent to the channel region and which is covered by the ferroelectric layer is dimensioned such that a remanent polarization of the ferroelectric layer which is aligned parallel to the main surface, Com - Generation of charge charges in the second area of the channel area.
- the remanent polarization of the ferroelectric layer is aligned parallel to the main surface in the ferroelectric transistor by the first polarization electrode and the second polarization electrode, the electric field generated by the remanent polarization is also aligned parallel to the main surface.
- the compensation charges in the second region of the channel region are generated by the lateral stray field of the electrical field, which is much smaller than the electrical field itself. Therefore, breakdown of the dielectric layer between the semiconductor substrate and the ferroelectric layer is reliably avoided.
- the ferroelectric layer is switched into two different polarization states, one polarization state generating so many compensation charges in the second region that the second region conducts, while the other polarization state generates so little compensation charges that the second region of the channel - not leading area.
- the ferroelectric transistor is driven via the gate electrode, which drives the first region of the channel region.
- the ferroelectric transistor conducts, in this case the polarization of the ferroelectric layer is sufficient for the conductivity of the second region of the channel region, or whether the ferroelectric transistor is not conductive, in this case the polarization state is sufficient for the conductivity of the second region of the canal area.
- the change in the polarization state of the ferroelectric layer is carried out via the first polarization electrode and the second polarization electrode.
- the thickness of the dielectric layer is above the part of the first bordering the channel region Source-dram area smaller than the thickness of the dielectric layer above the second region of the channel region and smaller than the dimension of the second region of the channel region parallel to the main area. This ensures that the insulation of the dielectric layer above the second region is so good that compensation charges accumulate in the second region of the channel and not on the surface of the dielectric layer.
- the ferroelectric layer is arranged partially above the channel region.
- the thickness of the dielectric layer is essentially the same above a part of the channel region adjoining the first source-drain region and above that part of the first source-dram region adjoining the channel region.
- the second polarization electrode and the gate electrode are designed as a common electrode.
- the thickness of the dielectric layer below the first polarization electrode which is arranged above the first source-dra region, and above the part of the first source-dram region adjoining the channel region, is essentially the same.
- the dimension perpendicular to the main surface of the interface between the first polarization electrode and the ferroelectric layer is larger than between the second polarization electrode and the ferroelectric layer. This increases the stray electrical field effective in the second region of the channel area.
- the thickness of the dielectric layer below the first polarization electrode and below the second polarization electrode is essentially the same.
- the dimension perpendicular to the main surface of the interface between the first polarization electrode and the ferroelectric layer and the second polarization electrode and the ferroelectric layer is essentially the same, which is advantageous with regard to the manufacture of the ferroelectric transistor.
- the dielectric layer comprises a first dielectric layer and a second dielectric layer.
- the first dielectric layer is arranged on the main surface.
- the second dielectric layer is arranged above it.
- the second dielectric layer has an opening in the region of the gate electrode, so that the gate electrode is arranged on the surface of the first dielectric layer.
- the first dielectric layer thus corresponds to the gate dielectric of the ferroelectric transistor.
- the first dielectric layer preferably contains Si0 2 , Ce0 2 , Zr0 2 or Ta 2 0 5 and has a thickness between 3.5 nm and 20 nm.
- the second dielectric layer preferably contains Si 3 N 4 , Ce0 2 or another selectively etchable dielectric material and has a thickness between 10 nm and 500 nm above the second region of the channel region and above the part of the first source dram adjacent to the channel region. Area has a thickness between 10 nm and 300 nm.
- the second dielectric layer can also contain non-selectively etchable dielectric material if the selective etchability is of minor importance for the production. With regard to any degradation of the ferroelectric layer, it is advantageous to form the second dielectric layer as an air gap or vacuum region. For this purpose, an auxiliary structure is generated, which is etched out again after the neighboring structures have been completed.
- the ferroelectric layer can contain all ferroelectric materials that are suitable for a ferroelectric transistor.
- the f rroelectric layer contains SBT (SrB ⁇ 2 Ta 2 0 9 ), PZT (PbZr x T ⁇ xx 0 2 ) or BMF (BaMgF 4 ) -
- the semiconductor substrate can be a monocrystalline silicon wafer, an SOI substrate, an SiGe substrate or a III-V semiconductor.
- Figure 1 shows a section through a ferroelectric
- FIG. 2 shows a layout for a memory cell arrangement which has ferroelectric transistors as memory cells.
- FIGS. 3 to 5 show steps for producing a ferroelectric transistor.
- a first source-dram region 121 and a second source-dram region 122 are arranged, which are n + -doped and between which a channel region 13 is arranged (see FIG. 1).
- the first source dram region 121, the channel region 13 and the second source dram region 122 adjoin a main surface 110 of the semiconductor substrate 11.
- first dielectric layer 14 made of Ce0 2 , Zr0 2 , Ta 2 0 5 or S ⁇ 0 2 m with a layer thickness of 20 nm arranged.
- a second dielectric layer 15 made of Si 3 N 4 is arranged above the first source-drain region 121 and covers a part of the channel region 13 adjoining the first source-drain region 121.
- a first electrode 16, a ferroelectric layer 17 and a second electrode 18 are arranged on the surface of the second dielectric layer, the second electrode 18 laterally overlapping the second dielectric layer 15 and being arranged partially on the surface of the first dielectric layer 14.
- the ferroelectric layer 17 is arranged above a part of the first source-drain region 121 which adjoins the channel region 13.
- the ferroelectric layer 17 also extends over a part of the channel region 13 which adjoins the first source-drain region 121.
- the ferroelectric layer contains PZT or SBT and has a thickness of 100 to 300 nm.
- the thickness of the second dielectric layer 15 below the first electrode 16 and below the ferroelectric layer 17 is 200 nm.
- the thickness of the dielectric layer 15 in the region of the second electrode 18 is 2 to 50 nm.
- the part of the second electrode 18 that is above one The first region 131 of the channel region 13 is arranged on the surface of the first dielectric layer 14 and acts as a gate electrode.
- the part of the second electrode 18 which is arranged above a second region 132 on the surface of the second dielectric layer 15 acts as a second polarization electrode.
- the first electrode 16 acts as the first polarization electrode.
- a planarizing passivation layer 19 is provided, which is the first electrode 16, the ferroelectric layer
- the remanent polarization of the ferroelectric layer 17 is aligned parallel to the direction of a current through the channel region 13.
- the ferroelectric layer 17 only partially covers the channel region 13.
- the second electrode 18 only partially covers the ferroelectric layer 17.
- surface charges required to compensate for the ferroelectric polarization of the ferroelectric layer 17 will be arranged mainly at the interface with the first electrode 16 and the second electrode 18. In the area where the ferroelectric
- Layer 17 is laterally adjacent to the thicker part of the second dielectric layer 15 above the second region 132, the surface charges for compensating the ferroelectric compensation are arranged in the semiconductor substrate 11. These compensation charges are arranged in the part of the channel region 13 adjoining the first source dram region 121. Depending on the polarization of the ferroelectric layer 17, they cause this part of the channel region 13 to be conductive or not. In order to bring about a conductivity of this part of the channel region 13, a charge density of approximately 0.1 ⁇ C / cm 2 is sufficient. This corresponds to approximately one percent of the value of the remanent polarization of the ferroelectric layer 17. Approximately, this part of the channel region 13 can thus be 10 to 100 times larger than the part of the ferroelectric layer 17 that laterally adjoins the second dielectric layer 15.
- the ferroelectric layer 17 By arranging the ferroelectric layer over only a part of the channel region 13, it is achieved that the electrical field strength m near the ferroelectric layer 17 and the electrical field strength at the first dielectric layer 14 in the first region 131, m to which this is te-Dielekt ⁇ kum works, differ. Electrical breakdowns and reliability problems on the gate dielectric can thus be prevented. At the same time, the ferroelectric layer 17 can be polarized up to its maximum value, which leads to an improvement in the data management. For the ferroelectric layer 17, all ferroelectric materials suitable for the use of m microelectronic components, the PZT, SBT or related materials, which result from doping with other substances or through the replacement of one element by another, are therefore in question.
- the part of the second electrode 18 arranged above the first region 131 acts as a gate electrode for the transistor. It is arranged directly on the surface of the first dielectric layer 14, which acts as a gate dielectric in this region. In comparison to known ferroelectric transistors, this has the advantage that no further capacitors are connected in series between the gate electrode and the gate dielectric. Also between the ferroelectric layer 17 and the first electrode 16, which as the first polarization electrode acts, and the second electrode 18, which acts as the second polarization electrode, no further capacitances are connected, via which part of the voltage would drop, which is applied for polarization between the first electrode 16 and the second electrode 18. in the
- the ferroelectric layer 17 m of this ferroelectric transistor can be polarized without any problems. Smaller programming voltages than known arrangements are required.
- the ferroelectric transistor can be implemented with only three connections.
- a corresponding write or erase voltage is applied to the first electrode 16 and the second electrode 18 for writing or deleting information.
- the ferroelectric layer 17 is thereby polarized.
- the reading voltage at the second source dram region 122 is selected such that the first region 131 of the channel region 13, which is not controlled by the ferroelectric layer 17, is brought into inversion and thus opened.
- the written information is assessed by a continuity test between the first source wire - ⁇ CQ s: N> ON ⁇ ? CQ 3 ⁇ N Hi CQ Kl CQ M rr H- 1 to LQ LQ to:> rt N t ⁇ to to ⁇
- H r H d ⁇ HH ⁇ rt PJ H d ⁇ ⁇ ⁇ H ⁇ (- ⁇ d ⁇ o ⁇ d 0 0 d H d ⁇ ⁇ rt ⁇
- a second dielectric layer 25 made of Si 3 N 4 , strontium titanate or the same material as the first dielectric layer 24 is deposited and structured. The structuring is done by masked etching. The surface of the first dielectric layer 24 is exposed above a first region 231 of the channel region 23. Furthermore, the thickness of the second dielectric layer 25 is reduced to 200 nm above a part of the first source dram region 221, which adjoins the channel region 31. Above a second region 232 of the channel region 23, the full thickness of 10 to 500 nm of the second dielectric layer 25 is retained.
- a ferroelectric layer made of PZT or SBT is then formed by deposition in a CVD process with a thickness of 100 to 300 nm and subsequent structuring.
- the ferroelectric layer 26 is arranged on the surface of the second dielectric layer 25 above the part of the first source-dram region 221 which adjoins the channel region 23 (see FIG. 4).
- a first electrode 27 and a second electrode 28 are formed on opposite sides of the ferroelectric layer 26, which are spacer-like (see FIG. 4).
- the second electrode 28 extends to the exposed surface of the first dielectric layer 24 above the second region 231 of the channel region 23 and the adjoining second source-dram region 222.
- an annealing is carried out, which can take place either directly after the deposition of the ferroelectric layer, after the structuring of the ferroelectric layer or after the deposition of platinum. Alternatively, several temperings can be carried out at different times.
- H PJ ⁇ ⁇ CQ PJ CL ⁇ 0 Hj ⁇ r irr ⁇ SD 3 rt ⁇ -
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- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
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- Non-Volatile Memory (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001527365A JP3977079B2 (ja) | 1999-09-30 | 2000-09-29 | 強誘電トランジスター、および、そのメモリーセル構造における使用方法 |
US10/113,418 US6614066B2 (en) | 1999-09-30 | 2002-04-01 | Ferroelectric transistor and memory cell configuration with the ferroelectric transistor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19947117A DE19947117B4 (de) | 1999-09-30 | 1999-09-30 | Ferroelektrischer Transistor und dessen Verwendung in einer Speicherzellenanordnung |
DE19947117.7 | 1999-09-30 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/113,418 Continuation US6614066B2 (en) | 1999-09-30 | 2002-04-01 | Ferroelectric transistor and memory cell configuration with the ferroelectric transistor |
Publications (1)
Publication Number | Publication Date |
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WO2001024275A1 true WO2001024275A1 (de) | 2001-04-05 |
Family
ID=7924015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/DE2000/003468 WO2001024275A1 (de) | 1999-09-30 | 2000-09-29 | Ferroelektrischer transistor und dessen verwendung in einer speicherzellenanordnung |
Country Status (7)
Country | Link |
---|---|
US (1) | US6614066B2 (de) |
JP (1) | JP3977079B2 (de) |
KR (1) | KR100455638B1 (de) |
CN (1) | CN1192438C (de) |
DE (1) | DE19947117B4 (de) |
TW (1) | TW483168B (de) |
WO (1) | WO2001024275A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20230223066A1 (en) * | 2022-01-07 | 2023-07-13 | Ferroelectric Memory Gmbh | Memory cell and methods thereof |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005017534A1 (de) * | 2004-12-29 | 2006-07-13 | Hynix Semiconductor Inc., Ichon | Nichtflüchtige ferroelektrische Speichervorrichtung |
DE102005017072A1 (de) * | 2004-12-29 | 2006-07-13 | Hynix Semiconductor Inc., Ichon | Ladungsfalle- bzw. Ladung-Trap-Isolator-Speichereinrichtung |
DE102005017533A1 (de) * | 2004-12-29 | 2006-07-13 | Hynix Semiconductor Inc., Ichon | Nichtflüchtige ferroelektrische Speichervorrichtung |
KR100696766B1 (ko) * | 2004-12-29 | 2007-03-19 | 주식회사 하이닉스반도체 | 차지 트랩 인슐레이터 메모리 장치 |
CN101315948B (zh) * | 2007-05-29 | 2010-05-26 | 中国科学院物理研究所 | 一种自旋晶体管 |
WO2011043794A2 (en) * | 2009-09-29 | 2011-04-14 | Yale University | Ferroelectric devices including a layer having two or more stable configurations |
US10056393B2 (en) * | 2016-03-01 | 2018-08-21 | Namlab Ggmbh | Application of antiferroelectric like materials in non-volatile memory devices |
US11004867B2 (en) * | 2018-06-28 | 2021-05-11 | Taiwan Semiconductor Manufacturing Co., Ltd. | Embedded ferroelectric memory in high-k first technology |
CN111029409B (zh) * | 2019-10-31 | 2023-06-02 | 上海集成电路研发中心有限公司 | 一种性能可调的晶体管 |
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US5384729A (en) * | 1991-10-28 | 1995-01-24 | Rohm Co., Ltd. | Semiconductor storage device having ferroelectric film |
EP0566585B1 (de) * | 1991-01-09 | 1995-03-29 | Siemens Aktiengesellschaft | Speicherzellenanordnung und verfahren zu deren betrieb |
US5708284A (en) * | 1995-03-20 | 1998-01-13 | Sharp Kabushiki Kaisha | Non-volatile random access memory |
JPH10135362A (ja) * | 1996-10-25 | 1998-05-22 | Texas Instr Inc <Ti> | 薄膜半導体ゲート電極を使用した強誘電性トランジスタおよびその製造方法 |
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JPH10341002A (ja) * | 1997-06-06 | 1998-12-22 | Oki Electric Ind Co Ltd | 強誘電体トランジスタ、半導体記憶装置、強誘電体トランジスタの取扱い方法および強誘電体トランジスタの製造方法 |
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1999
- 1999-09-30 DE DE19947117A patent/DE19947117B4/de not_active Expired - Fee Related
-
2000
- 2000-09-28 TW TW089120043A patent/TW483168B/zh not_active IP Right Cessation
- 2000-09-29 CN CNB008134723A patent/CN1192438C/zh not_active Expired - Fee Related
- 2000-09-29 KR KR10-2002-7004109A patent/KR100455638B1/ko not_active IP Right Cessation
- 2000-09-29 JP JP2001527365A patent/JP3977079B2/ja not_active Expired - Lifetime
- 2000-09-29 WO PCT/DE2000/003468 patent/WO2001024275A1/de active IP Right Grant
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2002
- 2002-04-01 US US10/113,418 patent/US6614066B2/en not_active Expired - Fee Related
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EP0566585B1 (de) * | 1991-01-09 | 1995-03-29 | Siemens Aktiengesellschaft | Speicherzellenanordnung und verfahren zu deren betrieb |
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Cited By (1)
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---|---|---|---|---|
US20230223066A1 (en) * | 2022-01-07 | 2023-07-13 | Ferroelectric Memory Gmbh | Memory cell and methods thereof |
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---|---|
US6614066B2 (en) | 2003-09-02 |
DE19947117A1 (de) | 2001-04-12 |
CN1376312A (zh) | 2002-10-23 |
CN1192438C (zh) | 2005-03-09 |
US20020117702A1 (en) | 2002-08-29 |
KR100455638B1 (ko) | 2004-11-06 |
JP3977079B2 (ja) | 2007-09-19 |
TW483168B (en) | 2002-04-11 |
JP2003510851A (ja) | 2003-03-18 |
KR20020038783A (ko) | 2002-05-23 |
DE19947117B4 (de) | 2007-03-08 |
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