JPH11510320A - 不揮発性メモリセルの製造方法 - Google Patents
不揮発性メモリセルの製造方法Info
- Publication number
- JPH11510320A JPH11510320A JP9508026A JP50802697A JPH11510320A JP H11510320 A JPH11510320 A JP H11510320A JP 9508026 A JP9508026 A JP 9508026A JP 50802697 A JP50802697 A JP 50802697A JP H11510320 A JPH11510320 A JP H11510320A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- polysilicon
- oxide
- antioxidant
- silicon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 230000015654 memory Effects 0.000 title claims abstract description 11
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 50
- 229920005591 polysilicon Polymers 0.000 claims abstract description 49
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 16
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 16
- 238000005530 etching Methods 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims abstract description 9
- 150000004767 nitrides Chemical class 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 17
- 239000010703 silicon Substances 0.000 claims description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 16
- 230000003647 oxidation Effects 0.000 claims description 11
- 238000007254 oxidation reaction Methods 0.000 claims description 11
- 229920002120 photoresistant polymer Polymers 0.000 claims description 11
- 238000000059 patterning Methods 0.000 claims description 5
- 238000000206 photolithography Methods 0.000 claims description 5
- 239000007943 implant Substances 0.000 claims description 4
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims 1
- 230000003449 preventive effect Effects 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 7
- 239000000377 silicon dioxide Substances 0.000 abstract description 7
- 230000000873 masking effect Effects 0.000 abstract description 3
- 238000005538 encapsulation Methods 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000002513 implantation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 241000282376 Panthera tigris Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000003631 wet chemical etching Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/30—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the memory core region
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B99/00—Subject matter not provided for in other groups of this subclass
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66825—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a floating gate
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. 集積回路内にトランジスタとコンデンサを有する不揮発性メモリセルの製 造方法において、全面的に施されたシリコン層から出発して、 シリコン層を酸化防止層で覆い、 この酸化防止層を、トランジスタのゲート領域及びフィールド領域を覆うマス クを形成するために酸化防止層のエッチング及びマスキングされていない領域内 のポリシリコンの露出により、フィールド領域上に残留している酸化防止層が誘 電体を、またその下にあるポリシリコンがコンデンサの第1の電極を形成するよ うに、フォトリソグラフィによりパターン化し、 酸化防止層から露出している範囲のポリシリコンを部分酸化により二酸化シリ コンに変換し、 残留酸化防止層の包含のもとにもう1つのポリシリコン層を施し、 フォトレジストマスクを施し、フィールド領域上にあるもう1つのポリシリコ ン層をコンデンサの第2の電極を形成するために被覆するようにパターン化し、 マスキングされていない範囲のもう1つのポリシリコン層のエッチングにより コンデンサの第2の電極を形成し、 場合によってはもう1つの製造プロセスにとって必要でない範囲の酸化防止層 を除去する ことを特徴とする不揮発性メモリセルの製造方法。 2. ポリシリコンの変換を熱酸化により行うことを特徴とする請求項1記載の 製造方法。 3. 酸化防止層が少なくとも1つの窒化物層から成ることを特徴とする請求項 1又は記載の製造方法。 4. 窒化物層が窒化酸化物又は酸化物−窒化物のサンドイッチ又は酸化物−窒 化物−酸化物から成ることを特徴とする請求項3記載の製造方法。 5. MOSトランジスタの製造時にフォトリソグラフィの際に使用されたフォ トマスクを除去する前にソース/ドレイン注入を露出しているシリコンを通して 行うことを特徴とする請求項1乃至4の1つに記載の製造方法。 6. ソース/ドレイン領域並びにフィールド酸化物領域内のポリシリコンを二 酸化シリコンに変換することを特徴とする請求項5記載の製造方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19528991.9 | 1995-08-07 | ||
DE19528991A DE19528991C2 (de) | 1995-08-07 | 1995-08-07 | Herstellungsverfahren für eine nichtflüchtige Speicherzelle |
PCT/DE1996/001477 WO1997006559A2 (de) | 1995-08-07 | 1996-08-07 | Herstellungsverfahren für eine nichtflüchtige speicherzelle |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11510320A true JPH11510320A (ja) | 1999-09-07 |
Family
ID=7768896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9508026A Pending JPH11510320A (ja) | 1995-08-07 | 1996-08-07 | 不揮発性メモリセルの製造方法 |
Country Status (6)
Country | Link |
---|---|
US (2) | US6291287B1 (ja) |
EP (1) | EP0843891B1 (ja) |
JP (1) | JPH11510320A (ja) |
KR (1) | KR100400531B1 (ja) |
DE (2) | DE19528991C2 (ja) |
WO (1) | WO1997006559A2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6432791B1 (en) * | 1999-04-14 | 2002-08-13 | Texas Instruments Incorporated | Integrated circuit capacitor and method |
US6787840B1 (en) * | 2000-01-27 | 2004-09-07 | Advanced Micro Devices, Inc. | Nitridated tunnel oxide barriers for flash memory technology circuitry |
DE10238590B4 (de) | 2002-08-22 | 2007-02-15 | Infineon Technologies Ag | Verfahren zur Erzeugung einer Struktur auf einem Substrat |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3933220A (en) * | 1974-05-17 | 1976-01-20 | Swager William E | Climbing device |
DE2739662A1 (de) * | 1977-09-02 | 1979-03-08 | Siemens Ag | Verfahren zur herstellung von mos-transistoren |
US5109258A (en) * | 1980-05-07 | 1992-04-28 | Texas Instruments Incorporated | Memory cell made by selective oxidation of polysilicon |
JPS5742169A (en) * | 1980-08-26 | 1982-03-09 | Toshiba Corp | Production of semiconductor device |
US4445266A (en) * | 1981-08-07 | 1984-05-01 | Mostek Corporation | MOSFET Fabrication process for reducing overlap capacitance and lowering interconnect impedance |
US4400867A (en) * | 1982-04-26 | 1983-08-30 | Bell Telephone Laboratories, Incorporated | High conductivity metallization for semiconductor integrated circuits |
US4490193A (en) * | 1983-09-29 | 1984-12-25 | International Business Machines Corporation | Method for making diffusions into a substrate and electrical connections thereto using rare earth boride materials |
US4837176A (en) * | 1987-01-30 | 1989-06-06 | Motorola Inc. | Integrated circuit structures having polycrystalline electrode contacts and process |
IT1208646B (it) * | 1987-06-11 | 1989-07-10 | Sgs Mocroelettronica S P A | Fasi di mascherature. procedimento per la fabbricazione di condensatori in processi cmos e nmos con riduzione del numero di |
US4927780A (en) * | 1989-10-02 | 1990-05-22 | Motorola, Inc. | Encapsulation method for localized oxidation of silicon |
US5151378A (en) * | 1991-06-18 | 1992-09-29 | National Semiconductor Corporation | Self-aligned planar monolithic integrated circuit vertical transistor process |
US5393686A (en) * | 1994-08-29 | 1995-02-28 | Taiwan Semiconductor Manufacturing Company | Method of forming gate oxide by TLC gettering clean |
US5786263A (en) * | 1995-04-04 | 1998-07-28 | Motorola, Inc. | Method for forming a trench isolation structure in an integrated circuit |
US5866453A (en) * | 1995-09-14 | 1999-02-02 | Micron Technology, Inc. | Etch process for aligning a capacitor structure and an adjacent contact corridor |
US5895250A (en) * | 1998-06-11 | 1999-04-20 | Vanguard International Semiconductor Corporation | Method of forming semicrown-shaped stacked capacitors for dynamic random access memory |
-
1995
- 1995-08-07 DE DE19528991A patent/DE19528991C2/de not_active Expired - Fee Related
-
1996
- 1996-08-07 DE DE59609433T patent/DE59609433D1/de not_active Expired - Lifetime
- 1996-08-07 EP EP96934341A patent/EP0843891B1/de not_active Expired - Lifetime
- 1996-08-07 KR KR10-1998-0700973A patent/KR100400531B1/ko not_active IP Right Cessation
- 1996-08-07 JP JP9508026A patent/JPH11510320A/ja active Pending
- 1996-08-07 WO PCT/DE1996/001477 patent/WO1997006559A2/de active IP Right Grant
-
1998
- 1998-02-09 US US09/020,872 patent/US6291287B1/en not_active Ceased
-
2004
- 2004-11-29 US US11/000,495 patent/USRE40275E1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0843891A2 (de) | 1998-05-27 |
DE59609433D1 (de) | 2002-08-14 |
USRE40275E1 (en) | 2008-04-29 |
KR19990036305A (ko) | 1999-05-25 |
US6291287B1 (en) | 2001-09-18 |
DE19528991C2 (de) | 2002-05-16 |
EP0843891B1 (de) | 2002-07-10 |
WO1997006559A2 (de) | 1997-02-20 |
KR100400531B1 (ko) | 2003-11-15 |
DE19528991A1 (de) | 1997-06-19 |
WO1997006559A3 (de) | 1997-03-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040713 |
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A601 | Written request for extension of time |
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A602 | Written permission of extension of time |
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A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050112 |
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A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20050412 |