JP6875188B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP6875188B2 JP6875188B2 JP2017086339A JP2017086339A JP6875188B2 JP 6875188 B2 JP6875188 B2 JP 6875188B2 JP 2017086339 A JP2017086339 A JP 2017086339A JP 2017086339 A JP2017086339 A JP 2017086339A JP 6875188 B2 JP6875188 B2 JP 6875188B2
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Description
[構造説明]
本実施の形態の半導体装置を、図1を参照して説明する。図1は、本実施の形態の半導体装置の要部断面図である。
本実施の形態の半導体装置の製造方法を、図4〜図23を参照して説明する。図4〜図23には、メモリ領域1A、低耐圧MISFET形成領域1Bおよび高耐圧MISFET形成領域1Cの要部断面図が示されており、メモリ領域1Aに不揮発性メモリのメモリ素子(記憶素子、メモリセル)MCが、低耐圧MISFET形成領域1Bに低耐圧のMISFET2が、高耐圧MISFET形成領域1Cに高耐圧のMISFET3が、それぞれ形成される様子が示されている。
本実施の形態においては、各種応用例について説明する。なお、本実施の形態において説明する各応用例の半導体装置は、実施の形態1と類似の構成部を有し、また、その構成部は、実施の形態1と同様の製造工程で形成することができる。よって、実施の形態1と類似の構成部やその製造工程については、その説明は省略する、または、簡易に説明する。
メモリ素子をメモリトランジスタMTと選択トランジスタSMTとで構成してもよい。図24は、本応用例の半導体装置のメモリ領域を示す要部断面図である。図24に示すように、本応用例においては、メモリ素子がメモリトランジスタMTと選択トランジスタSMTとで構成されている。そして、このメモリトランジスタMTと選択トランジスタSMTは直列に接続されている。
実施の形態1においては、図11に示されるように、各絶縁膜(絶縁膜MZ3、絶縁膜GF2、絶縁膜GF1)上に、同時に金属または金属酸化物の添加(スパッタリング)を行ったが、個別に、金属または金属酸化物の添加処理を行ってもよい。図25〜図33は、本応用例の半導体装置の製造工程中の要部断面図である。
実施の形態1においては、図11に示されるように、絶縁膜(絶縁膜MZ3、絶縁膜GF2、絶縁膜GF1)上に、同時に金属または金属酸化物の添加(スパッタリング)を行ったが、個別に、金属または金属酸化物の添加処理を行ってもよい。図34〜図43は、本応用例の半導体装置の製造工程中の要部断面図である。
本実施の形態においては、SOI基板に形成されたメモリ素子を有する半導体装置について説明する。図44〜図79は、本実施の形態の半導体装置の製造工程中の要部断面図である。なお、本実施の形態において説明する半導体装置は、実施の形態1、2と類似の構成部を有し、また、その構成部は、実施の形態1、2と同様の製造工程で形成することができる。よって、実施の形態1、2と類似の構成部やその製造工程については、その説明は省略する、または、簡易に説明する。
本実施の形態の半導体装置は、前述の製造工程を示す図のうち最終工程図である図78、図79に示すように、SOI基板SB1のSOI領域(11A、11B)に形成されたメモリトランジスタMT、選択トランジスタSMTおよび低耐圧のMISFET2と、バルク領域(1A、1C)に形成されたメモリトランジスタMT、選択トランジスタSMTおよび高耐圧のMISFET3と、を有する。
本実施の形態の半導体装置の製造方法を、図44〜図79を参照して説明する。図44〜図79には、SOI領域であるメモリ領域11Aと、SOI領域である低耐圧MISFET形成領域11Bと、バルク領域であるメモリ領域1Aと、バルク領域である高耐圧MISFET形成領域1Cの要部断面図が示されている。そして、メモリ領域1A、11Aに不揮発性メモリのメモリ素子を構成するメモリトランジスタMTと選択トランジスタSMTが、低耐圧MISFET形成領域11Bに低耐圧のMISFET2が、高耐圧MISFET形成領域1Cに高耐圧のMISFET3が、それぞれ形成される様子が示されている。
1B 低耐圧MISFET形成領域
1C 高耐圧MISFET形成領域
2 低耐圧のMISFET
3 高耐圧のMISFET
11A メモリ領域
11B 低耐圧MISFET形成領域
BOX 絶縁層
EC1 電荷蓄積膜
EC2 電荷蓄積膜
EP エピタキシャル層
EX1 n−型半導体領域
EX2 n−型半導体領域
EX3 n−型半導体領域
EX11 n−型半導体領域
EX12 n−型半導体領域
GE1 ゲート電極
GE2 ゲート電極
GF1 絶縁膜
GF1H 絶縁膜
GF2 絶縁膜
GF2H 絶縁膜
IFE 絶縁膜
IL1 絶縁膜
IL2 絶縁膜
M1 配線
MC メモリ素子
MG ゲート電極(メモリゲート電極)
MT メモリトランジスタ
MZ 絶縁膜(積層絶縁膜)
MZ1 絶縁膜
MZ2 絶縁膜
MZ3 絶縁膜
MZ3a 酸化シリコン膜
MZ3b 金属または金属酸化物
MZ3H 絶縁膜
MZE 絶縁膜
OS オフセットスペーサ
PG プラグ
PR1 フォトレジスト膜
PR2 フォトレジスト膜
PR3 フォトレジスト膜
PR4 フォトレジスト膜
PR5 フォトレジスト膜
PR6 フォトレジスト膜
PR20 フォトレジスト膜
PR21 フォトレジスト膜
PR22 フォトレジスト膜
PR23 フォトレジスト膜
PR24 フォトレジスト膜
PS シリコン層
PS1 シリコン層
PS2 シリコン層
PW1 p型ウエル
PW2 p型ウエル
PW3 p型ウエル
PW11 p型ウエル
PW12 p型ウエル
S シリコン層
SB 半導体基板
SB1 SOI基板
SD1 n+型半導体領域
SD2 n+型半導体領域
SD3 n+型半導体領域
SD11 n+型半導体領域
SD12 n+型半導体領域
SG 選択ゲート電極
SL 金属シリサイド層
SS 支持基板
SMT 選択トランジスタ
ST 素子分離領域
SW サイドウォールスペーサ
SW1 サイドウォールスペーサ
SW2 サイドウォールスペーサ
SW3 サイドウォールスペーサ
Claims (10)
- (a)不揮発性のメモリ素子を形成するための第1領域を含む半導体基板を用意する工程、
(b)前記半導体基板上に、前記メモリ素子のゲート絶縁膜用の第1絶縁膜を形成する工程、
(c)前記第1絶縁膜上に、導電性膜を形成し、前記導電性膜をパターニングすることにより、前記メモリ素子用の第1ゲート電極を形成する工程、
を有し、
前記(b)工程は、
(b1)前記半導体基板上に、第1酸化シリコン膜を有する第1膜を形成する工程、
(b2)前記第1膜上に、窒化シリコン膜を有し、かつ、電荷蓄積部となる第2膜を形成する工程、
(b3)前記第2膜上に、第2酸化シリコン膜を有し、金属または金属酸化物の添加層である第3膜を形成する工程、
を有し、
前記(b3)工程は、
(b3−1)前記第2膜上に、前記第2酸化シリコン膜を形成する工程、
(b3−2)前記第2酸化シリコン膜上に、前記金属または前記金属酸化物をスパッタリング法により原子または分子状態で添加する工程、
を有し、
前記金属は、その酸化物が酸化シリコンより誘電率の高い金属であり、
前記金属酸化物は、酸化シリコンより誘電率が高い、半導体装置の製造方法。 - 請求項1記載の半導体装置の製造方法において、
前記金属は、HfまたはAlであり、前記金属酸化物は、HfO2またはAl2O3である、半導体装置の製造方法。 - 請求項2記載の半導体装置の製造方法において、
前記第3膜は、Hf、Al、HfO2およびAl2O3の添加層であり、
前記(b3−2)工程は、
前記第2酸化シリコン膜上に、Hfターゲットを用いてスパッタリング法によりHfを添加する工程と、
前記第2酸化シリコン膜上に、Alターゲットを用いてスパッタリング法によりAlを添加する工程と、
を有する、半導体装置の製造方法。 - 請求項3記載の半導体装置の製造方法において、
前記(b2)工程は、
(b2−1)前記第1膜上に、第1窒化シリコン膜を形成する工程、
(b2−2)前記第1窒化シリコン膜の上部を酸化することにより酸窒化シリコン膜を形成する工程、
(b2−3)前記酸窒化シリコン膜上に、第2窒化シリコン膜を形成する工程、
を有する、半導体装置の製造方法。 - 請求項1記載の半導体装置の製造方法において、
前記金属または前記金属酸化物は、前記第2酸化シリコン膜上に、1×10 13 atoms/cm 2 〜5×10 14 atoms/cm 2 の面密度で添加されている、半導体装置の製造方法。 - (a)不揮発性のメモリ素子を形成するための第1領域と、第1トランジスタを形成するための第2領域と、第2トランジスタを形成するための第3領域と、を含む半導体基板を用意する工程、
(b)前記第1、第2および第3領域の前記半導体基板上に、前記第1トランジスタのゲート絶縁膜用の第1絶縁膜を形成する工程、
(c)前記(b)工程後、前記第1領域の前記第1絶縁膜を除去し、前記第2および第3領域の前記第1絶縁膜を残す工程、
(d)前記(c)工程後、前記第1領域の前記半導体基板上に、前記メモリ素子のゲート絶縁膜用の第2絶縁膜を形成する工程、
(e)前記(d)工程後、前記第3領域の前記第1絶縁膜を除去し、前記第2領域の前記第1絶縁膜と前記第1領域の前記第2絶縁膜とを残す工程、
(f)前記(e)工程後、前記第3領域の前記半導体基板上に、前記第2トランジスタのゲート絶縁膜用の第3絶縁膜を形成する工程、
(g)前記第1、第2、第3絶縁膜上に、金属または金属酸化物をスパッタリング法により原子または分子状態で添加する工程、
(h)前記(g)工程後、前記第1、第2、第3絶縁膜上に、第1の膜を形成し、前記第1の膜をパターニングすることにより、前記メモリ素子用の第1ゲート電極と前記第1トランジスタ用の第2ゲート電極と前記第2トランジスタ用の第3ゲート電極とを形成する工程、
を有し、
前記金属は、その酸化物が酸化シリコンより誘電率の高い金属であり、
前記金属酸化物は、酸化シリコンより誘電率が高い、半導体装置の製造方法。 - 請求項6記載の半導体装置の製造方法において、
前記第2絶縁膜は、第1酸化シリコン膜と、その上の窒化シリコン膜と、その上の第2酸化シリコン膜からなる、半導体装置の製造方法。 - 請求項7記載の半導体装置の製造方法において、
前記金属は、HfまたはAlであり、前記金属酸化物は、HfO2またはAl2O3である、半導体装置の製造方法。 - 請求項8記載の半導体装置の製造方法において、
前記第2酸化シリコン膜は、Hf、Al、HfO2およびAl2O3の添加層であり、
前記(g)工程は、
前記第2酸化シリコン膜上に、Hfターゲットを用いてスパッタリング法によりHfを添加する工程と、
前記第2酸化シリコン膜上に、Alターゲットを用いてスパッタリング法によりAlを添加する工程と、
を有する、半導体装置の製造方法。 - 請求項6記載の半導体装置の製造方法において、
前記金属または前記金属酸化物は、前記第2酸化シリコン膜上に、1×10 13 atoms/cm 2 〜5×10 14 atoms/cm 2 の面密度で添加されている、半導体装置の製造方法。
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JP2017086339A JP6875188B2 (ja) | 2017-04-25 | 2017-04-25 | 半導体装置の製造方法 |
US15/898,201 US20180308957A1 (en) | 2017-04-25 | 2018-02-15 | Semiconductor device and method of manufacturing the semiconductor device |
EP18159245.2A EP3416195A3 (en) | 2017-04-25 | 2018-02-28 | Semiconductor device and method of manufacturing the semiconductor device |
KR1020180034844A KR20180119478A (ko) | 2017-04-25 | 2018-03-27 | 반도체 장치 및 반도체 장치의 제조 방법 |
TW107112958A TWI778046B (zh) | 2017-04-25 | 2018-04-17 | 半導體裝置之製造方法 |
CN201810374912.3A CN108735759A (zh) | 2017-04-25 | 2018-04-24 | 半导体器件及制造半导体器件的方法 |
US17/031,975 US20210013328A1 (en) | 2017-04-25 | 2020-09-25 | Semiconductor device and method of manufacturing the semiconductor device |
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US11658208B2 (en) * | 2018-03-20 | 2023-05-23 | Intel Corporation | Thin film transistors for high voltage applications |
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US6844604B2 (en) * | 2001-02-02 | 2005-01-18 | Samsung Electronics Co., Ltd. | Dielectric layer for semiconductor device and method of manufacturing the same |
US6642573B1 (en) * | 2002-03-13 | 2003-11-04 | Advanced Micro Devices, Inc. | Use of high-K dielectric material in modified ONO structure for semiconductor devices |
JP4477886B2 (ja) * | 2003-04-28 | 2010-06-09 | 株式会社ルネサステクノロジ | 半導体装置の製造方法 |
US7081421B2 (en) * | 2004-08-26 | 2006-07-25 | Micron Technology, Inc. | Lanthanide oxide dielectric layer |
US7564108B2 (en) * | 2004-12-20 | 2009-07-21 | Taiwan Semiconductor Manufacturing Company, Ltd. | Nitrogen treatment to improve high-k gate dielectrics |
CN101283448B (zh) * | 2005-10-03 | 2011-08-31 | 恩益禧电子股份有限公司 | 半导体存储装置及其制造方法 |
JP4365850B2 (ja) * | 2006-11-20 | 2009-11-18 | 株式会社東芝 | 不揮発性半導体記憶装置 |
JP4372174B2 (ja) * | 2007-03-28 | 2009-11-25 | 株式会社東芝 | 不揮発性半導体メモリ及びその製造方法 |
US7816727B2 (en) * | 2007-08-27 | 2010-10-19 | Macronix International Co., Ltd. | High-κ capped blocking dielectric bandgap engineered SONOS and MONOS |
KR101347286B1 (ko) * | 2007-12-20 | 2014-01-03 | 삼성전자주식회사 | 비휘발성 메모리 소자 |
JP2009239002A (ja) * | 2008-03-27 | 2009-10-15 | Fujitsu Ltd | 半導体装置の製造方法 |
JP2009246211A (ja) * | 2008-03-31 | 2009-10-22 | Tokyo Electron Ltd | Mos型半導体メモリ装置の製造方法、コンピュータ読み取り可能な記憶媒体およびプラズマcvd装置 |
TWI426610B (zh) * | 2009-07-22 | 2014-02-11 | Nat Univ Tsing Hua | 電荷儲存元件及其製造方法 |
JP5707224B2 (ja) * | 2011-05-20 | 2015-04-22 | ルネサスエレクトロニクス株式会社 | 半導体装置およびその製造方法 |
JP6081228B2 (ja) * | 2013-02-28 | 2017-02-15 | ルネサスエレクトロニクス株式会社 | 半導体装置およびその製造方法 |
US9331184B2 (en) * | 2013-06-11 | 2016-05-03 | United Microelectronics Corp. | Sonos device and method for fabricating the same |
JP2016039329A (ja) * | 2014-08-08 | 2016-03-22 | 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 |
JP6420614B2 (ja) * | 2014-09-30 | 2018-11-07 | 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 |
JP6877319B2 (ja) * | 2017-11-15 | 2021-05-26 | ルネサスエレクトロニクス株式会社 | 半導体装置およびその製造方法 |
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- 2018-03-27 KR KR1020180034844A patent/KR20180119478A/ko not_active Application Discontinuation
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EP3416195A3 (en) | 2019-02-27 |
US20210013328A1 (en) | 2021-01-14 |
CN108735759A (zh) | 2018-11-02 |
KR20180119478A (ko) | 2018-11-02 |
EP3416195A2 (en) | 2018-12-19 |
US20180308957A1 (en) | 2018-10-25 |
JP2018186162A (ja) | 2018-11-22 |
TWI778046B (zh) | 2022-09-21 |
TW201901805A (zh) | 2019-01-01 |
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