JP5715804B2 - 半導体装置及びその製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 82
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000012535 impurity Substances 0.000 claims description 63
- 238000002955 isolation Methods 0.000 claims description 54
- 239000000758 substrate Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 268
- 238000000926 separation method Methods 0.000 description 11
- 239000011229 interlayer Substances 0.000 description 7
- 229910021332 silicide Inorganic materials 0.000 description 6
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- 229910052796 boron Inorganic materials 0.000 description 5
- 230000005684 electric field Effects 0.000 description 5
- 238000005468 ion implantation Methods 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 239000002784 hot electron Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000004151 rapid thermal annealing Methods 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000005036 potential barrier Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910021341 titanium silicide Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 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
- 239000005380 borophosphosilicate glass Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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- Ceramic Engineering (AREA)
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- Insulated Gate Type Field-Effect Transistor (AREA)
Description
12 半導体層 13 素子分離層
14 LOCOS絶縁膜 15 厚いゲート絶縁膜
16 薄いゲート絶縁膜 17 ゲート電極
18,20 レジスト層 19 ボディ層
21 ドリフト層 21A 第1の領域
21B 第2の領域 22 サイドウォール
23 N−型層 24 N+型層
25 ドレイン層 26 P+型層
27 シリサイド層 28 層間絶縁膜
29A,29B 電極 30A ソース配線
30B ドレイン配線 40 ドレイン分離層
Claims (4)
- 第1導電型の半導体基板と、
前記半導体基板上に形成された第2導電型のエピタキシャル層と、
前記半導体基板と前記エピタキシャル層の境界領域に形成された第2導電型の埋め込み層と、
前記エピタキシャル層の中に形成された第1導電型の素子分離層と、
前記エピタキシャル層の表面に形成された第1導電型のボディ層と、
前記ボディ層の表面に形成された第2導電型のソース層と、
前記素子分離層で囲まれた前記エピタキシャル層の表面に形成され、第1の不純物濃度ピーク領域を有した第1の領域と、この第1の領域に隣接し、前記第1の不純物濃度ピーク領域よりも前記エピタキシャル層の表面から深い位置に第2の不純物濃度ピーク領域を有した第2の領域を備えた第2導電型のドリフト層と、
前記第2の領域の表面に配置された第2導電型のドレイン層と、
前記エピタキシャル層の中に、前記ボディ層と接触し、前記ドリフト層を囲んで形成された第1導電型のドレイン分離層と、
前記エピタキシャル層の表面に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成されたゲート電極を備え、前記第2の領域は前記第1の領域よりも前記エピタキシャル層の表面から深く形成され、前記第1の不純物濃度ピーク領域は前記第1の領域の他の領域よりも高い不純物濃度を有し、前記第2の不純物濃度ピーク領域は前記第2の領域の他の領域よりも高い不純物濃度を有することを特徴とする半導体装置。 - 前記ゲート絶縁膜は、薄いゲート絶縁膜と、この薄いゲート絶縁膜と隣接して形成された厚いゲート絶縁膜からなり、
前記ボディ層の端部は、前記薄いゲート絶縁膜と重畳し、前記第1の領域の端部は、前記厚いゲート絶縁膜と重畳することを特徴とする請求項1に記載の半導体装置。 - 前記ドレイン層は、前記第1の領域から離れて形成されていることを特徴とする請求項1又は2に記載の半導体装置。
- 第1導電型の半導体基板上に、第1導電型の素子分離層を含む第2の導電型のエピタキシャル層を形成すると共に、前記素子分離層に囲まれた前記エピタキシャル層の中に第1導電型のドレイン分離層を形成する工程と、
前記ドレイン分離層に囲まれた領域で、前記エピタキシャル層の表面に厚いゲート絶縁膜と、この厚いゲート絶縁膜とを接触した薄いゲート絶縁膜を形成する工程と、
前記厚いゲート絶縁膜と前記薄いゲート絶縁膜に跨るようにゲート電極を形成する工程と、
前記薄いゲート絶縁膜上に開口部を有した第1のレジスト層を形成し、この第1のレジスト層をマスクとして、前記エピタキシャル層の表面に第1導電型の不純物をイオン注入することにより、前記エピタキシャル層の表面に第1導電型のボディ層を形成する工程と、
前記厚いゲート絶縁膜上に開口部を有した第2のレジスト層を形成し、この第2のレジスト層をマスクとして、前記ゲート電極及び前記厚いゲート絶縁膜を通して、前記エピタキシャル層の中に第2導電型の不純物をイオン注入することにより、第1の不純物濃度ピーク領域を有した第1の領域と、この第1の領域に隣接し、前記第1の不純物濃度ピーク領域よりも前記エピタキシャル層の表面から深い位置に第2の不純物濃度ピーク領域を有した第2の領域を備えた第2導電型のドリフト層を形成する工程と、
前記ボディ層の表面に第2導電型のソース層を形成する工程と、
前記ドリフト層の前記第2の領域の表面に第2導電型のドレイン層を形成する工程を備え、前記第2の領域は前記第1の領域よりも前記エピタキシャル層の表面から深く形成され、前記第1の不純物濃度ピーク領域は前記第1の領域の他の領域よりも高い不純物濃度を有し、前記第2の不純物濃度ピーク領域は前記第2の領域の他の領域よりも高い不純物濃度を有することを特徴とする半導体装置の製造方法。
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JP2010261270A JP5715804B2 (ja) | 2010-11-24 | 2010-11-24 | 半導体装置及びその製造方法 |
TW100142210A TW201230207A (en) | 2010-11-24 | 2011-11-18 | Semiconductor device and method for making the semiconductor device |
US13/303,850 US8698236B2 (en) | 2010-11-24 | 2011-11-23 | Semiconductor device and method of manufacturing the same |
US14/187,871 US9099552B2 (en) | 2010-11-24 | 2014-02-24 | Semiconductor device and method of manufacturing the same |
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JP5715804B2 (ja) * | 2010-11-24 | 2015-05-13 | セミコンダクター・コンポーネンツ・インダストリーズ・リミテッド・ライアビリティ・カンパニー | 半導体装置及びその製造方法 |
DE102011087845B4 (de) * | 2011-12-06 | 2015-07-02 | Infineon Technologies Ag | Laterales transistorbauelement und verfahren zu dessen herstellung |
US8853780B2 (en) * | 2012-05-07 | 2014-10-07 | Freescale Semiconductor, Inc. | Semiconductor device with drain-end drift diminution |
WO2014033991A1 (ja) * | 2012-08-30 | 2014-03-06 | パナソニック株式会社 | 半導体装置 |
US9490322B2 (en) | 2013-01-23 | 2016-11-08 | Freescale Semiconductor, Inc. | Semiconductor device with enhanced 3D resurf |
JP6123516B2 (ja) * | 2013-06-28 | 2017-05-10 | 株式会社ソシオネクスト | 半導体装置 |
US9087774B2 (en) * | 2013-09-26 | 2015-07-21 | Monolithic Power Systems, Inc. | LDMOS device with short channel and associated fabrication method |
TWI511296B (zh) * | 2013-10-31 | 2015-12-01 | Vanguard Int Semiconduct Corp | 橫向雙擴散金氧半導體裝置及其製造方法 |
US9543379B2 (en) | 2014-03-18 | 2017-01-10 | Nxp Usa, Inc. | Semiconductor device with peripheral breakdown protection |
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