JP7779660B2 - SiC電子装置におけるドーピング活性化及びオーミックコンタクト形成並びにSiC電子装置 - Google Patents
SiC電子装置におけるドーピング活性化及びオーミックコンタクト形成並びにSiC電子装置Info
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- H10D64/00—Electrodes of devices having potential barriers
- H10D64/01—Manufacture or treatment
- H10D64/011—Manufacture or treatment of electrodes ohmically coupled to a semiconductor
- H10D64/0111—Manufacture or treatment of electrodes ohmically coupled to a semiconductor to Group IV semiconductors
- H10D64/0115—Manufacture or treatment of electrodes ohmically coupled to a semiconductor to Group IV semiconductors to silicon carbide
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- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/102—Constructional design considerations for preventing surface leakage or controlling electric field concentration
- H10D62/103—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices
- H10D62/105—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices by having particular doping profiles, shapes or arrangements of PN junctions; by having supplementary regions, e.g. junction termination extension [JTE]
- H10D62/106—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices by having particular doping profiles, shapes or arrangements of PN junctions; by having supplementary regions, e.g. junction termination extension [JTE] having supplementary regions doped oppositely to or in rectifying contact with regions of the semiconductor bodies, e.g. guard rings with PN or Schottky junctions
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/124—Shapes, relative sizes or dispositions of the regions of semiconductor bodies or of junctions between the regions
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/80—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials
- H10D62/83—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group IV materials, e.g. B-doped Si or undoped Ge
- H10D62/8303—Diamond
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- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/80—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials
- H10D62/881—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being a two-dimensional material
- H10D62/882—Graphene
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/60—Electrodes characterised by their materials
- H10D64/62—Electrodes ohmically coupled to a semiconductor
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- H10D8/00—Diodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D8/00—Diodes
- H10D8/01—Manufacture or treatment
- H10D8/051—Manufacture or treatment of Schottky diodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D8/00—Diodes
- H10D8/60—Schottky-barrier diodes
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- H—ELECTRICITY
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- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P30/00—Ion implantation into wafers, substrates or parts of devices
- H10P30/20—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping
- H10P30/202—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping characterised by the semiconductor materials
- H10P30/204—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping characterised by the semiconductor materials into Group IV semiconductors
- H10P30/2042—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping characterised by the semiconductor materials into Group IV semiconductors into crystalline silicon carbide
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P30/00—Ion implantation into wafers, substrates or parts of devices
- H10P30/20—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping
- H10P30/21—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping of electrically active species
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P30/00—Ion implantation into wafers, substrates or parts of devices
- H10P30/20—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping
- H10P30/28—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping characterised by an annealing step, e.g. for activation of dopants
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P34/00—Irradiation with electromagnetic or particle radiation of wafers, substrates or parts of devices
- H10P34/40—Irradiation with electromagnetic or particle radiation of wafers, substrates or parts of devices with high-energy radiation
- H10P34/42—Irradiation with electromagnetic or particle radiation of wafers, substrates or parts of devices with high-energy radiation with electromagnetic radiation, e.g. laser annealing
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/80—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials
- H10D62/83—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group IV materials, e.g. B-doped Si or undoped Ge
- H10D62/832—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group IV materials, e.g. B-doped Si or undoped Ge being Group IV materials comprising two or more elements, e.g. SiGe
- H10D62/8325—Silicon carbide
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- Electrodes Of Semiconductors (AREA)
Description
Claims (14)
- SiCを基礎とした電子装置(50)を製造する方法であって、前記電子装置(50)は、合体型PiNショットキー(MPS)ダイオードを含み、前記方法が、
N型のSiCの固体本体であって互いに反対側の表側側部と裏側側部とを具備するN型のSiC基板を用意し、且つ該基板の該表側側部上にN型のSiCのドリフト層(52)をエピタキシャル的に成長させることを包含してSiCの固体本体を形成し、
N型の導電型とP型のドーパント種とを有しており注入領域(59’)を形成しているSiCの固体本体(52)の表側側部(52a)であって、該注入領域は該固体本体の表側側部(52a)から開始して該固体本体内へ或る深さ延在しており且つ該固体本体の前記表側側部(52a)と同一表面状の上部表面を具備している該表側側部(52a)において注入を行い、
前記注入領域(59’)内において、一つ又はそれ以上のカーボンリッチ層、特にグラフェン及び/又はグラファイト層、を含むオーミックコンタクト領域(59”)を形成すると共に同時的に前記P型のドーパント種を活性化させるために該注入領域(59’)を1500℃乃至2600℃の間の温度への加熱を発生させるべく前記注入領域(59’)へ向けて指向されたレーザービーム(82)を発生し、前記オーミックコンタクト領域(59”)は該ドリフト層(52)とショットキーダイオードを形成するように構成される、
ことを包含している方法。 - 前記レーザービーム(82)が、
290nm乃至370nmの間の波長、
100乃至300nsの間のパルス期間、
1個乃至10個の間のパルス数、
1.6乃至4J/cm2の間のエネルギ密度、
というパラメータの下で発生される請求項1記載の方法。 - 該注入領域(59’)の加熱が該注入領域(59’)の方向(Z)に沿ってその厚さ全体にわたって行われる請求項1又は2記載の方法。
- 該オーミックコンタクト領域(59”)を形成することが、該表側側部(52a)から開始して該注入領域(59’)内へ前記一つ又はそれ以上のカーボンリッチ層を形成することを包含している請求項1乃至3の内のいずれか1項に記載の方法。
- 前記オーミックコンタクト領域(59”)が該注入領域(59’)の上部表面と一致するそれ自身の上部表面を有している請求項4記載の方法。
- 前記オーミックコンタクト領域(59”)が1nm乃至20nmの間の厚さを有している請求項1乃至5の内のいずれか1項に記載の方法。
- 該固体本体の物質が4H-SiC、6H-SiC、3C-SiC、15R-SiCの内の一つである請求項1乃至6の内のいずれか1項に記載の方法。
- 前記注入領域(59’)と接合障壁(JB)ダイオードを形成し且つ該ドリフト層(52)とショットキーダイオードを形成するために該オーミックコンタクト領域(59”)を介して該注入領域(59’)と電気的にコンタクトし且つ該注入領域(59’)に関して横方向に該ドリフト層(52)と直接に電気的にコンタクトする第1電気的端子(58)を形成するステップと、
該基板の該裏側側部上に第2電気的端子(57)を形成するステップと、
を包含する請求項1に記載の方法。 - SiCを基礎とした電子装置(50)であって、前記電子装置(50)は、合体型PiNショットキー(MPS)ダイオードを含み、
前記合体型PiNショットキー(MPS)ダイオードが、
N型の導電度を有するSiCの固体本体(52)であって、該固体本体が、互いに反対側の表側側部と裏側側部とを有しており、N型のSiC基板と、該基板の該表側側部上のN型のSiCのドリフト層(52)とを包含する、SiCの固体本体(52)、
該固体本体(52)の表側側部(52a)における注入領域(59’)であって、P型のドーパント種を包含しており、該表側側部(52a)から開始して該固体本体内へ或る深さ延在しており、且つ該固体本体の前記表側側部(52a)と同一面状の上部表面を有している該注入領域(59’)、
前記注入領域(59’)内へ延在するオーミックコンタクト領域(59”)であって、一つ又はそれ以上のカーボンリッチ層、特に、グラフェン及び/又はグラファイト層、を包含している該オーミックコンタクト領域(59”)であって、該ドリフト層(52)とショットキーダイオードを形成する該オーミックコンタクト領域(59”)、
を有している、電子装置。 - 該オーミックコンタクト領域(59”)が、該固体本体の該表側側部(52a)から開始する該注入領域内に専ら延在している前記一つ又はそれ以上のカーボンリッチ層を有している請求項9に記載の電子装置。
- 前記オーミックコンタクト領域(59”)が該注入領域(59’)の上部表面と一致するそれ自身の上部表面を有している請求項10に記載の電子装置。
- 前記オーミックコンタクト領域(59”)が1nm乃至20nmの間の厚さを有している請求項9乃至11の内のいずれか1項に記載の電子装置。
- 該固体本体の物質が4H-SiC、6H-SiC、3C-SiC、15R-SiCの内の一つである請求項9乃至12の内のいずれか1項に記載の電子装置。
- 前記注入領域(59’)と接合障壁(JB)ダイオードを形成し且つ該ドリフト層(52)とショットキーダイオードを形成するために該オーミックコンタクト領域(59”)を介して該注入領域(59’)と電気的にコンタクトしており且つ該注入領域(59’)に関して横方向に該ドリフト層(52)と直接的に電気的にコンタクトしている第1電気的端子(58)、及び
該基板の該裏側側部上の第2電気的端子(57)、
を更に有している請求項9乃至13の内のいずれか1項に記載の電子装置。
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| JP2025200610A JP2026015561A (ja) | 2020-04-17 | 2025-11-20 | SiC電子装置におけるドーピング活性化及びオーミックコンタクト形成並びにSiC電子装置 |
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| IT102020000008167A IT202000008167A1 (it) | 2020-04-17 | 2020-04-17 | Attivazione droganti e formazione di contatto ohmico in un dispositivo elettronico in sic, e dispositivo elettronico in sic |
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| US (3) | US11670685B2 (ja) |
| EP (1) | EP3896719B1 (ja) |
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| IT202000004696A1 (it) | 2020-03-05 | 2021-09-05 | St Microelectronics Srl | METODO DI FABBRICAZIONE DI UN DISPOSITIVO ELETTRONICO IN SiC CON FASI DI MANIPOLAZIONE RIDOTTE, E DISPOSITIVO ELETTRONICO IN SiC |
| IT202000008179A1 (it) | 2020-04-17 | 2021-10-17 | St Microelectronics Srl | Formazione di contatti ohmici in un dispositivo elettronico basato su sic, e dispositivo elettronico |
| IT202000008167A1 (it) * | 2020-04-17 | 2021-10-17 | St Microelectronics Srl | Attivazione droganti e formazione di contatto ohmico in un dispositivo elettronico in sic, e dispositivo elettronico in sic |
| IT202000015100A1 (it) | 2020-06-23 | 2021-12-23 | St Microelectronics Srl | Metodo di fabbricazione di un dispositivo rivelatore di una radiazione uv basato su sic e dispositivo rivelatore di una radiazione uv basato su sic |
| IT202200005363A1 (it) * | 2022-03-18 | 2023-09-18 | St Microelectronics Srl | Formazione di un dispositivo elettronico, quale un diodo jbs o mps, basato su 3c-sic, e dispositivo elettronico in 3c-sic |
| US12593485B2 (en) * | 2022-03-18 | 2026-03-31 | Stmicroelectronics S.R.L. | Forming an electronic device, such as a JBS or MPS diode, based on 3C—SiC, and 3C—SiC electronic device |
| US20250113506A1 (en) * | 2023-10-03 | 2025-04-03 | Stmicroelectronics International N.V. | One-step front ohmic and schottky contact foramtion on sic power devices with laser annealing |
| IT202400003835A1 (it) | 2024-02-23 | 2025-08-23 | St Microelectronics Int Nv | Metodo per la regolazione dell'altezza della barriera schottky in un diodo di potenza in carburo di silicio, e diodo di potenza |
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- 2021-04-12 EP EP21167866.9A patent/EP3896719B1/en active Active
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| US11670685B2 (en) | 2023-06-06 |
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| JP2021174983A (ja) | 2021-11-01 |
| IT202000008167A1 (it) | 2021-10-17 |
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| EP3896719B1 (en) | 2025-09-10 |
| CN215220656U (zh) | 2021-12-17 |
| US20210328023A1 (en) | 2021-10-21 |
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