JPH11274494A - 半導体素子の製造方法 - Google Patents
半導体素子の製造方法Info
- Publication number
- JPH11274494A JPH11274494A JP10314840A JP31484098A JPH11274494A JP H11274494 A JPH11274494 A JP H11274494A JP 10314840 A JP10314840 A JP 10314840A JP 31484098 A JP31484098 A JP 31484098A JP H11274494 A JPH11274494 A JP H11274494A
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- region
- gate
- insulating film
- gate insulating
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- 239000004065 semiconductor Substances 0.000 title claims description 23
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000012535 impurity Substances 0.000 claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- 238000005468 ion implantation Methods 0.000 claims abstract description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000002513 implantation Methods 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 3
- 238000000059 patterning Methods 0.000 claims description 2
- 238000010405 reoxidation reaction Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000012528 membrane Substances 0.000 claims 1
- 230000006866 deterioration Effects 0.000 abstract description 7
- 229920002120 photoresistant polymer Polymers 0.000 abstract description 5
- -1 nitrogen ions Chemical class 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 description 3
- 230000005669 field effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
- H01L21/265—Bombardment with radiation with high-energy radiation producing ion implantation
- H01L21/26506—Bombardment with radiation with high-energy radiation producing ion implantation in group IV semiconductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/823462—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type with a particular manufacturing method of the gate insulating layers, e.g. different gate insulating layer thicknesses, particular gate insulator materials or particular gate insulator implants
-
- 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
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42364—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the insulating layer, e.g. thickness or uniformity
- H01L29/42368—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the insulating layer, e.g. thickness or uniformity the thickness being non-uniform
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
- H01L21/265—Bombardment with radiation with high-energy radiation producing ion implantation
- H01L21/26586—Bombardment with radiation with high-energy radiation producing ion implantation characterised by the angle between the ion beam and the crystal planes or the main crystal surface
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
- H01L21/28176—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation with a treatment, e.g. annealing, after the formation of the definitive gate conductor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/981—Utilizing varying dielectric thickness
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- High Energy & Nuclear Physics (AREA)
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- General Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
Abstract
(電界効果トランジスタ)の製造方法を提供する。 【解決手段】 第1の領域と第2の領域を有する半導体
基板の各領域にゲートとソース及びドレインをそれぞれ
形成してなる半導体素子の製造方法において、各領域の
上面に形成されたゲート絶縁膜に再酸化を施す前に第1
の領域の上部であって該領域のゲートの両側部位に不純
物領域を形成しておくことを特徴とする方法。
Description
方法に関し、詳しくは、ゲート絶縁膜の製造方法に関す
る。
タ)のゲート絶縁膜の製造においては、図4に示すよう
に、半導体基板11の周辺領域11aのゲート絶縁膜1
3a及びゲート15aをマスク17にて保護しつつ該半
導体基板のセル領域11bのゲート絶縁膜13bにのみ
再酸化(re-oxidation)を施していた。
ートであり、19は各領域のソース/ドレイン領域であ
る。
スタ)の製造においては、ゲート再酸化を施して、ゲー
トの食刻及び/又はホットキャリアー(hot carrier)
ストレス等によるゲート絶縁膜の損傷を復旧(recove
r)し、ゲート減少ドレイン漏れ(Gate Induced Drain
Leakage;以下、GIDLという)電流を減少させる
が、該再酸化により電気的特性が悪化する(ドレイン電
流及びしきい電圧の減少)という問題が発生するため、
製造過程における半導体素子中のそれが特に必要な一部
領域にマスク(mask)を形成して該領域のゲートの再酸
化を防止するようにしていた。
来の製造方法においては、ゲート再酸化工程はゲート絶
縁膜の信頼性を向上させるための必須工程であるため、
半導体素子の信頼性を一層向上させるには電気的特性の
悪化を最小化し得る範囲内で該ゲート再酸化を行わざる
を得なかった。
べくなされたもので、電気的特性の悪化を最小化し得る
半導体素子の製造方法を提供することを目的とする。
るため、本発明においては、第1及び第2の領域を有す
る半導体基板の各領域にゲートとソース及びドレインを
それぞれ形成してなる半導体素子の製造方法において、
各領域の上面に形成されたゲート絶縁膜に再酸化を施す
前に第1の領域の上部であって該領域のゲートの両側部
位に不純物領域を形成しておく。
を用いた傾斜イオン注入法により形成されることが好ま
しい。
2領域はセル領域である。
その厚さを、前記の不純物領域の不純物濃度及びその注
入エネルギーを調節することによって調節することが好
ましい。ゲートのパターニング(食刻)によるゲート絶
縁膜の損傷を防止すると共に電気的特性の悪化(しきい
電圧及びドレイン電流などの減少)を最小化し得るから
である
ト絶縁膜は、その厚さを再酸化の持続時間を調節するこ
とによって調節することが好ましい。ホットキャリアー
ストレス及びGIDL電流を低減し得るからである。
た図面を用いて本発明を詳細に説明する。本発明におい
ては、先ず、第1の領域41a及び第2の領域41bを
有する半導体基板41を準備し、該半導体基板の上面に
酸化膜からなるゲート絶縁膜43を形成する(図1参
照)。ここで、該第1の領域は周辺(Periphery)領域
であり、該第2の領域はセル(Cell)領域である。
導電層を形成し、該導電層をパターニングして前記の第
1の領域41a上に第1ゲート45aを、前記の第2の
領域41b上に第2ゲート45bをそれぞれ形成する
(図2(A)参照)。ここで、該導電層(図示せず)は
ゲートを形成するためのもの故ポリシリコンからなる層
とすることが好ましい。
ゲート絶縁膜43の上にのみフォトレジスト層47を形
成し、該フォトレジスト層をマスクとして前記第1の領
域41a内に傾斜イオン注入法により窒素イオンを注入
して、前記第1のゲート45aの両側部位に不純物(窒
素イオン)領域49を形成する(図2(B)参照)。こ
こで、該窒素イオン領域はゲート絶縁膜を再酸化する
(後述)際に酸化速度を減少させる役割を果たすので、
窒素イオン領域の注入形成によって該ゲート絶縁膜の酸
化率を該窒素イオン領域がない場合に比し約20〜30
%程度減少させることができる。
去した後、ゲート絶縁膜に再酸化を施す(図3(A)参
照)。その結果、前記第1のゲート45a両側に存する
ゲート絶縁膜43aは前記第2のゲート45b両側に存
するゲート絶縁膜43bより相対的に薄く形成される
(前述の通り、該第1のゲート両側に存する該ゲート絶
縁膜は前記の窒素イオン領域49の存在により酸化速度
が相対的に低下せしめられるためである。
a両側に存するゲート絶縁膜43aに関しては、電気的
特性の悪化(しきい電圧及びドレイン電流の減少)の最
小化をもたらす(該厚さの調節は、前記の窒素イオン領
域49のイオン濃度及びその注入エネルギーの調節にて
行われる)と共に、前記第2のゲート45b両側に存す
るゲート絶縁膜43bに関しては、ホットキャリアース
トレス及びGIDL電流の減少をもたらす(該厚さの調
節は、再酸化の持続時間により行う)。
a、45bの下部に存するゲート絶縁膜以外のそれを除
去し、該各ゲートの両側であって前記の半導体基板41
内の上部に各ソース/ドレイン領域51をそれぞれ形成
し(図3(B)参照。尚、この工程における具体的操作
は常法に従えばよい)終了する。
半導体素子の周辺領域には電気的特性の悪化(しきい電
圧及びドレイン電流等の減少)を最小化し得るゲート絶
縁膜を形成することができ、一方、半導体素子のセル領
域にはホットキャリアーストレス及びGIDL電流を減
少させることができるゲート絶縁膜を形成し得る、とい
う効果がある。
段を示す断面図である。
段を示す断面図である。
段を示す断面図である。
た断面図である。
Claims (7)
- 【請求項1】 第1の領域と第2の領域を有する半導体
基板の各領域にゲートとソース及びドレインをそれぞれ
形成してなる半導体素子の製造方法において、各領域の
上面に形成されたゲート絶縁膜に再酸化を施す前に第1
の領域の上部であって該領域のゲートの両側部位に不純
物領域を形成しておくことを特徴とする方法。 - 【請求項2】 前記の不純物領域の形成が傾斜イオン注
入法により行われる請求項1記載の方法。 - 【請求項3】 前記の注入されるイオンが、窒素である
請求項2記載の方法。 - 【請求項4】 前記の第1の領域が周辺領域であり、前
記の第2の領域がセル領域である請求項1乃至3の何れ
か1に記載の方法。 - 【請求項5】 前記の不純物領域の形成において、不純
物濃度及びその注入エネルギーを調節して第1の領域上
に形成されたゲート絶縁膜の再酸化後の厚さを調節する
請求項2又は3記載の方法。 - 【請求項6】 前記の再酸化の持続時間を調節して第2
の領域上に形成されたゲート酸化膜の厚さを調節する請
求項1記載の方法。 - 【請求項7】 第1及び第2の領域をそれぞれ有する半
導体基板を準備する工程と、 該半導体基板の上面にゲート絶縁膜を形成する工程と、 該ゲート絶縁膜の上面に導電層を形成し、該導電層をパ
ターニングして該第1及び第2の領域上にそれぞれ第1
及び第2のゲートを形成する工程と、 該第1の領域内であって該第1のゲートの両側部位に不
純物領域を形成する工程と、 該ゲート絶縁膜に再酸化を施し、該第の1ゲート両側部
位のゲート絶縁膜を該第2のゲート両側部位のゲート絶
縁膜より薄く形成する工程と、 各領域内であって各ゲートの両側部位にソース/ドレイ
ン領域をそれぞれ形成する工程と、を順次行うことを特
徴とする半導体素子の製造方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019980006380A KR100258882B1 (ko) | 1998-02-27 | 1998-02-27 | 반도체 소자의 제조 방법 |
KR6380/1998 | 1998-02-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11274494A true JPH11274494A (ja) | 1999-10-08 |
JP4443654B2 JP4443654B2 (ja) | 2010-03-31 |
Family
ID=19533913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31484098A Expired - Fee Related JP4443654B2 (ja) | 1998-02-27 | 1998-11-05 | 半導体素子の製造方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US6127248A (ja) |
JP (1) | JP4443654B2 (ja) |
KR (1) | KR100258882B1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6611031B2 (en) | 2000-09-28 | 2003-08-26 | Nec Corporation | Semiconductor device and method for its manufacture |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6355580B1 (en) | 1998-09-03 | 2002-03-12 | Micron Technology, Inc. | Ion-assisted oxidation methods and the resulting structures |
KR100353402B1 (ko) * | 1999-04-19 | 2002-09-18 | 주식회사 하이닉스반도체 | 반도체 소자의 제조방법 |
KR20030001827A (ko) * | 2001-06-28 | 2003-01-08 | 삼성전자 주식회사 | 이중 게이트 산화막을 갖는 반도체 소자의 제조방법 |
US7282426B2 (en) * | 2005-03-29 | 2007-10-16 | Freescale Semiconductor, Inc. | Method of forming a semiconductor device having asymmetric dielectric regions and structure thereof |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5132757A (en) * | 1990-11-16 | 1992-07-21 | Unisys Corporation | LDD field effect transistor having a large reproducible saturation current |
US5648282A (en) * | 1992-06-26 | 1997-07-15 | Matsushita Electronics Corporation | Autodoping prevention and oxide layer formation apparatus |
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JP3602679B2 (ja) * | 1997-02-26 | 2004-12-15 | 株式会社ルネサステクノロジ | 半導体装置およびその製造方法 |
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1998
- 1998-02-27 KR KR1019980006380A patent/KR100258882B1/ko not_active IP Right Cessation
- 1998-07-13 US US09/114,154 patent/US6127248A/en not_active Expired - Lifetime
- 1998-11-05 JP JP31484098A patent/JP4443654B2/ja not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6611031B2 (en) | 2000-09-28 | 2003-08-26 | Nec Corporation | Semiconductor device and method for its manufacture |
Also Published As
Publication number | Publication date |
---|---|
JP4443654B2 (ja) | 2010-03-31 |
KR19990071116A (ko) | 1999-09-15 |
US6127248A (en) | 2000-10-03 |
KR100258882B1 (ko) | 2000-06-15 |
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