JP4811901B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP4811901B2 JP4811901B2 JP2004165480A JP2004165480A JP4811901B2 JP 4811901 B2 JP4811901 B2 JP 4811901B2 JP 2004165480 A JP2004165480 A JP 2004165480A JP 2004165480 A JP2004165480 A JP 2004165480A JP 4811901 B2 JP4811901 B2 JP 4811901B2
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- 239000004065 semiconductor Substances 0.000 title claims description 32
- 238000002955 isolation Methods 0.000 claims description 216
- 239000000758 substrate Substances 0.000 claims description 43
- 210000000746 body region Anatomy 0.000 claims description 8
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 229910052814 silicon oxide Inorganic materials 0.000 description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 11
- 230000003071 parasitic effect Effects 0.000 description 11
- 229910052710 silicon Inorganic materials 0.000 description 11
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 8
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- 101000929885 Bacillus subtilis (strain 168) Isochorismatase Proteins 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 3
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- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
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- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
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- 230000002159 abnormal effect Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- -1 boron (B) Chemical class 0.000 description 1
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Description
本発明に係る実施の形態の説明に先立って、本発明の技術思想に到達するまでの過程を図1および図2を用いて説明する。
<A−1.装置構成>
本発明に係る半導体装置の実施の形態1として、まず、図3を用いてSOIデバイス100の平面構成を説明する。
次に、製造工程を順に示す断面図である図6〜図12を用いて、SOIデバイス100の製造方法について説明する。
以上説明したSOIデバイス100においては、MOSトランジスタT1およびT2のそれぞれのボディ領域は、部分分離絶縁膜PT1の下部のSOI層3を通じてボディ固定領域BR1およびBR2とキャリアの移動が可能であり、キャリアがチャネル形成領域に溜まるということを防止でき、またチャネル形成領域の電位を固定することができるので、基板浮遊効果を抑制できる。
なお、以上の説明では、分離絶縁膜の分離部よりも分離下SOI層の厚さが厚くなった構造を説明したが、分離下SOI層の抵抗値を考慮せずとも良いのであれば、分離絶縁膜の分離部よりも突き出し部の厚さを厚くした構造であれば、必ずしも分離絶縁膜の分離部よりも分離下SOI層の厚さを厚くせずとも良い。
<B−1.装置構成>
以上説明した実施の形態1においては、NMOS領域NRとPMOS領域PRとで、部分分離絶縁膜PT1や併合分離絶縁膜HT1などの分離絶縁膜の厚さが同じである構成を説明したが、NMOS領域NRとPMOS領域PRとで分離絶縁膜の厚さが異なる構成としても良い。
図13は、SOI層上から分離絶縁膜上にかけて延在するゲート電極GT1を表す平面図であり、SOI層3と分離絶縁膜PTとの境界を破線Yで示し、分離領域にはハッチングを付している。
また、SOIデバイス100Aの製造工程を、図19および図20を用いて説明する。
以上説明したように、NMOS領域とPMOS領域とで分離絶縁膜の厚さが異なる構成とすることで、ゲートエッチンググレートの差異に起因するゲート電極長の仕上がり寸法の差異を解消することができる。
以上の説明においては、NMOS領域とPMOS領域とで分離絶縁膜の厚さが異なる構成を示したが、領域によって分離絶縁膜の厚さを変える例としては、動作電圧の異なる領域への適用が考えられる。
<B−5−1.メモリセル部への適用例1>
また、SRAM(Static Random Access Memory)などのメモリデバイスにおいては、メモリセル部と論理演算処理を行う演算部とを有するが、メモリセル部においてはゲート電極の寸法制御が重要となるため、分離絶縁膜の突き出し部の厚さを、演算部などの他の回路領域より薄くすることが望ましい。
さらに、メモリセル部のトランジスタを全てPチャネル型で構成することができないような場合、例えばCMOS(Complementary MOS)インバータを有するような場合には、Pチャネル型のMOSトランジスタが配設されたPMOS領域PRについては分離絶縁膜を全てFTI構造とすることが有効である。この構成の一例について、図22および図23を用いて説明する。
図23に示すように、SOI基板SB上は、PMOS領域PRとNMOS領域NRとに区分され、PMOS領域PRとNMOS領域NRとの間は、併合分離絶縁膜HT4によって電気的に分離され、PMOS領域PR内においては、MOSトランジスタ間には完全分離絶縁膜FTが配設され、NMOS領域NR内においては、MOSトランジスタ間には部分分離絶縁膜PT5が配設されている。そしてゲート電極GT10は複数の活性領域領域AR上に跨るように、ゲート絶縁膜GXを間に介して配設されている。
Claims (14)
- 土台となる基板部、前記基板部上に配設された埋め込み酸化膜、および前記埋め込み酸化膜上に配設されたSOI層を有するSOI基板と、
前記SOI層上の第1および第2の領域内にそれぞれ配設された第1および第2の素子分離絶縁膜と、
前記第1の領域と前記第2の領域との間に配設された第3の素子分離絶縁膜と、を備え、
前記第1および第2の素子分離絶縁膜は、その下部に前記SOI層を有する部分トレンチ分離構造をなし、
前記第3の素子分離絶縁膜は、前記SOI層を貫通して前記埋め込み酸化膜に達する完全トレンチ分離構造を少なくとも一部分に含み、
前記第1の領域には各々が前記SOI層内に選択的に形成される第1導電型の第1のソースおよび第1のドレイン領域と、
前記第1のソースおよび第1のドレイン領域間の前記SOI層の領域上に第1のゲート酸化膜を介して形成される第1のゲート電極と、
前記第1のソースおよび第1のドレイン領域間の前記SOI層の第2導電型の領域である第1のボディ領域とを備える第1のMOSトランジスタを有し、
前記第1のゲート電極は、前記第1の素子分離絶縁膜上まで延在し、
前記第1および第2の素子分離絶縁膜は、
前記SOI層の主面より下に延在する分離部の厚さより、前記SOI層の主面から上側に突出する突き出し部の厚さが厚い構造を有する、半導体装置。 - 前記第2の領域には各々が前記SOI層内に選択的に形成される第2導電型の第2のソースおよび第2のドレイン領域と、
前記第2のソースおよび第2のドレイン領域間の前記SOI層の領域上に第2のゲート酸化膜を介して形成される第2のゲート電極と、
前記第2のソースおよび第2のドレイン領域間の前記SOI層の第1導電型の領域である第2のボディ領域とを備える第2のMOSトランジスタを有し、
前記第2のゲート電極は、前記第2の素子分離絶縁膜上まで延在する、請求項1記載の半導体装置。 - 前記第1および第2の素子分離絶縁膜は、
前記分離部の厚さより、前記分離部の下部の分離下SOI層の厚さが厚い、請求項2記載の半導体装置。 - 前記第3の素子分離絶縁膜は、
前記完全トレンチ分離構造をなす部分と、前記部分トレンチ分離構造をなす部分とを有した併合トレンチ分離構造をなし、
前記部分トレンチ分離構造をなす部分においては、前記分離部の厚さより、前記突き出し部の厚さが厚く、前記分離部の厚さより、前記分離下SOI層の厚さが厚い、請求項3記載の半導体装置。 - 前記第1および第2の素子分離絶縁膜は、
前記突き出し部の厚さがそれぞれで異なる、請求項2記載の半導体装置。 - 前記第3の素子分離絶縁膜は、
前記第1または第2の領域内に含まれる前記部分トレンチ分離構造をなす部分の前記突き出し部の厚さが、前記第1または第2の素子分離絶縁膜の前記突き出し部の厚さと同じである、請求項5記載の半導体装置。 - 前記第1のMOSトランジスタはNチャネル型であって、
前記第2のMOSトランジスタはPチャネル型であって、
前記第1の素子分離絶縁膜の前記突き出し部の厚さが、前記第2の素子分離絶縁膜の前記突き出し部よりも厚い、請求項5記載の半導体装置。 - 前記第1のMOSトランジスタは、第1の電圧で動作し、
前記第2のMOSトランジスタは、第2の電圧で動作し、
前記第1の素子分離絶縁膜の前記突き出し部の厚さが、前記第2の素子分離絶縁膜の前記突き出し部よりも厚い、請求項5記載の半導体装置。 - 前記第1のMOSトランジスタの前記第1のゲート電極は、第1のゲート電極幅を有し、
前記第2のMOSトランジスタの前記第2のゲート電極は、第2のゲート電極幅を有し、
前記第1の素子分離絶縁膜の前記突き出し部の厚さが、前記第2の素子分離絶縁膜の前記突き出し部よりも厚い、請求項5記載の半導体装置。
- 前記第1および第2のMOSトランジスタのそれぞれの、第1のソースおよび第1のドレイン領域および第2のソースおよび第2のドレイン領域は、前記埋め込み酸化膜に接する、請求項7ないし請求項9の何れかに記載の半導体装置。
- 土台となる基板部、前記基板部上に配設された埋め込み酸化膜、および前記埋め込み酸化膜上に配設されたSOI層を有するSOI基板と、
前記SOI層上の第1および第2の領域内にそれぞれ配設された第1および第2の素子分離絶縁膜と、
前記第1の領域と前記第2の領域との間に配設された第3の素子分離絶縁膜と、を備え、
前記第1の素子分離絶縁膜は、その下部に前記SOI層を有する部分トレンチ分離構造をなし、
前記第2および第3の素子分離絶縁膜は、前記SOI層を貫通して前記埋め込み酸化膜に達する完全トレンチ分離構造を少なくとも一部分に含み、
前記第1の領域には各々が前記SOI層内に選択的に形成される第1導電型のソースおよびドレイン領域と、
前記ソースおよびドレイン領域間の前記SOI層の領域上にゲート酸化膜を介して形成されるゲート電極と、
前記ソースおよびドレイン領域間の前記SOI層の第2導電型の領域であるボディ領域とを備えるMOSトランジスタを有し、
前記ゲート電極は、前記第1の素子分離絶縁膜上まで延在し、
前記第1の素子分離絶縁膜は、
前記SOI層の主面より下に延在する分離部の厚さより、前記SOI層の主面から上側に突出する突き出し部の厚さが厚い構造を有し、
前記第2の素子分離絶縁膜は、前記完全トレンチ分離構造のみを有し、
前記第3の素子分離絶縁膜は、
前記完全トレンチ分離構造をなす部分と、前記部分トレンチ分離構造をなす部分とを有した併合トレンチ分離構造をなし、前記部分トレンチ分離構造をなす部分においては、前記分離部の厚さより前記突き出し部の厚さが厚く、前記分離部の厚さより前記分離部の下部の分離下SOI層の厚さが厚く、
前記第2の素子分離絶縁膜の前記突き出し部の厚さおよび前記第3の素子分離絶縁膜の前記完全トレンチ分離構造をなす部分における前記突き出し部の厚さは、前記第1の素子分離絶縁膜の前記突き出し部の厚さよりも薄い構造を有する、半導体装置。 - 前記第1の領域に配設される前記MOSトランジスタはNチャネル型であって、
前記第2の領域は、Pチャネル型のMOSトランジスタが配設される領域である、請求項11記載の半導体装置。 - 前記ゲート電極は、前記第3の素子分離絶縁膜の前記部分トレンチ分離構造をなす部分上まで延在する、請求項12記載の半導体装置。
- 前記第3の素子分離絶縁膜は、
前記第1の領域上の第1の部分と前記第2の領域上の第2の部分と前記第1の領域と前記第2の領域の間で埋め込み酸化膜に接する第3の部分が連続する、請求項4、請求項5、請求項10の何れか1項に記載の半導体装置。
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JP2004165480A JP4811901B2 (ja) | 2004-06-03 | 2004-06-03 | 半導体装置 |
TW094115346A TW200603244A (en) | 2004-06-03 | 2005-05-12 | Semiconductor device |
KR1020050040724A KR20060047948A (ko) | 2004-06-03 | 2005-05-16 | 반도체 장치 |
US11/137,586 US7307318B2 (en) | 2004-06-03 | 2005-05-26 | Semiconductor device |
CNB2005100760227A CN100533771C (zh) | 2004-06-03 | 2005-06-03 | 半导体装置 |
US11/826,569 US7332776B2 (en) | 2004-06-03 | 2007-07-17 | Semiconductor device |
US11/979,120 US20080067593A1 (en) | 2004-06-03 | 2007-10-31 | Semiconductor device |
US11/979,119 US20080061372A1 (en) | 2004-06-03 | 2007-10-31 | Semiconductor device |
US12/003,277 US20080128810A1 (en) | 2004-06-03 | 2007-12-21 | Semiconductor device |
US12/003,273 US20080128814A1 (en) | 2004-06-03 | 2007-12-21 | Semiconductor device |
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JP4811901B2 (ja) * | 2004-06-03 | 2011-11-09 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
FR2888665B1 (fr) * | 2005-07-18 | 2007-10-19 | St Microelectronics Crolles 2 | Procede de realisation d'un transistor mos et circuit integre correspondant |
KR100758494B1 (ko) * | 2005-12-28 | 2007-09-12 | 동부일렉트로닉스 주식회사 | 반도체 장치의 소자 분리 영역 및 그 형성 방법 |
JP5052813B2 (ja) * | 2006-04-12 | 2012-10-17 | ルネサスエレクトロニクス株式会社 | 半導体集積回路装置 |
US7732287B2 (en) | 2006-05-02 | 2010-06-08 | Honeywell International Inc. | Method of forming a body-tie |
US7750429B2 (en) * | 2007-05-15 | 2010-07-06 | International Business Machines Corporation | Self-aligned and extended inter-well isolation structure |
CN101960604B (zh) * | 2008-03-13 | 2013-07-10 | S.O.I.Tec绝缘体上硅技术公司 | 绝缘隐埋层中有带电区的衬底 |
US7964897B2 (en) | 2008-07-22 | 2011-06-21 | Honeywell International Inc. | Direct contact to area efficient body tie process flow |
US8680617B2 (en) * | 2009-10-06 | 2014-03-25 | International Business Machines Corporation | Split level shallow trench isolation for area efficient body contacts in SOI MOSFETS |
CN101937930A (zh) * | 2010-08-31 | 2011-01-05 | 清华大学 | 一种高性能场效应晶体管及其形成方法 |
FR2991502B1 (fr) * | 2012-05-29 | 2014-07-11 | Commissariat Energie Atomique | Procede de fabrication d'un circuit integre ayant des tranchees d'isolation avec des profondeurs distinctes |
CN104505420B (zh) * | 2014-12-24 | 2016-08-31 | 苏州矩阵光电有限公司 | 一种光电探测器及其制备方法 |
FR3067516B1 (fr) * | 2017-06-12 | 2020-07-10 | Stmicroelectronics (Rousset) Sas | Realisation de regions semiconductrices dans une puce electronique |
FR3068507B1 (fr) * | 2017-06-30 | 2020-07-10 | Stmicroelectronics (Rousset) Sas | Realisation de regions semiconductrices dans une puce electronique |
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US10784119B2 (en) * | 2018-10-08 | 2020-09-22 | Globalfoundries Inc. | Multiple patterning with lithographically-defined cuts |
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JP4540146B2 (ja) | 1998-12-24 | 2010-09-08 | ルネサスエレクトロニクス株式会社 | 半導体装置の製造方法 |
JP2001230315A (ja) * | 2000-02-17 | 2001-08-24 | Mitsubishi Electric Corp | 半導体装置およびその製造方法 |
JP4969715B2 (ja) * | 2000-06-06 | 2012-07-04 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
JP4823408B2 (ja) * | 2000-06-08 | 2011-11-24 | ルネサスエレクトロニクス株式会社 | 不揮発性半導体記憶装置 |
KR100426485B1 (ko) * | 2001-12-22 | 2004-04-14 | 주식회사 하이닉스반도체 | 플래쉬 메모리 셀의 제조 방법 |
JP2003243662A (ja) * | 2002-02-14 | 2003-08-29 | Mitsubishi Electric Corp | 半導体装置およびその製造方法、半導体ウェハ |
US6828212B2 (en) * | 2002-10-22 | 2004-12-07 | Atmel Corporation | Method of forming shallow trench isolation structure in a semiconductor device |
US7271454B2 (en) | 2003-08-28 | 2007-09-18 | Renesas Technology Corp. | Semiconductor memory device and method of manufacturing the same |
JP3963463B2 (ja) * | 2003-12-24 | 2007-08-22 | 株式会社東芝 | 半導体装置及びその製造方法 |
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TW200603244A (en) | 2006-01-16 |
US20070257330A1 (en) | 2007-11-08 |
KR20060047948A (ko) | 2006-05-18 |
US20080128810A1 (en) | 2008-06-05 |
US7307318B2 (en) | 2007-12-11 |
US20050269637A1 (en) | 2005-12-08 |
CN1705137A (zh) | 2005-12-07 |
JP2005347520A (ja) | 2005-12-15 |
CN100533771C (zh) | 2009-08-26 |
US20080128814A1 (en) | 2008-06-05 |
US7332776B2 (en) | 2008-02-19 |
US20080061372A1 (en) | 2008-03-13 |
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