JP7311590B2 - タップの活性領域下のウェルの境界を含む方法及び装置 - Google Patents
タップの活性領域下のウェルの境界を含む方法及び装置 Download PDFInfo
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- JP7311590B2 JP7311590B2 JP2021519728A JP2021519728A JP7311590B2 JP 7311590 B2 JP7311590 B2 JP 7311590B2 JP 2021519728 A JP2021519728 A JP 2021519728A JP 2021519728 A JP2021519728 A JP 2021519728A JP 7311590 B2 JP7311590 B2 JP 7311590B2
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- H01L21/3105—After-treatment
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/76224—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using trench refilling with dielectric materials
- H01L21/76227—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using trench refilling with dielectric materials the dielectric materials being obtained by full chemical transformation of non-dielectric materials, such as polycristalline silicon, metals
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- H01L27/088—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate
- H01L27/092—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate complementary MIS field-effect transistors
- H01L27/0927—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate complementary MIS field-effect transistors comprising a P-well only in the substrate
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- H01L27/088—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate
- H01L27/092—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate complementary MIS field-effect transistors
- H01L27/0928—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate complementary MIS field-effect transistors comprising both N- and P- wells in the substrate, e.g. twin-tub
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- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66674—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/66681—Lateral DMOS transistors, i.e. LDMOS transistors
Description
本願は、2018年10月12日に出願された米国出願シリアルナンバー第16/159,180号に対する優先権の利益を主張するものであり、参照によりその全体が本明細書に援用される。
Claims (20)
- 装置であって、
第2のタイプの導電率を有する半導体構造内に形成された第1のタイプの導電率を有するウェル、及び
前記ウェルへのタップであって、前記ウェルと前記半導体構造との間の前記ウェルの境界が実質的に前記タップの活性領域の下にあり、前記ウェルの前記境界が、前記半導体構造のトレンチの側面とトレンチの角でまたはその上方で交差し、さらに、前記活性領域は、前記ウェル内の第1のドープ領域及び第2のドープ領域を含み、前記第2のドープ領域は、同じ導電性ドーパントで前記第1のドープ領域よりも高濃度にドープされる、前記ウェルへのタップを備える、前記装置。 - 前記タップの側面が、前記半導体構造に形成されたトレンチの側面に近接している、請求項1に記載の装置。
- 前記タップの前記活性領域に結合された接点をさらに備え、前記接点は前記ウェルの上にある、請求項1に記載の装置。
- 前記第2のドープ領域に、n+ドーパントが注入され、前記第1のドープ領域にn-ドーパントが注入される、請求項1に記載の装置。
- 前記ウェルと前記半導体構造によって形成されるp-n接合が、前記半導体構造に形成されたトレンチの角またはその上方にある接合を有する、請求項1に記載の装置。
- 前記第1のドープ領域は、実質的に、前記第2のドープ領域と、前記トレンチに隣接する前記タップの側面との間にある、請求項1に記載の装置。
- 装置を形成するための方法であって、
第2のタイプの導電率を有する半導体構造内に第1のタイプの導電率を有するウェルを形成すること、及び
活性領域を含む前記ウェルへのタップを形成することであって、前記ウェルと前記半導体構造との間の前記ウェルの境界が実質的に前記タップの前記活性領域の下にあり、前記活性領域が第1のドープ領域及び第2のドープ領域を含むように、前記活性領域を含む前記ウェルへのタップを形成すること、この場合前記第2のドープ領域は、同じ導電性ドーパントで前記第1のドープ領域よりも高濃度にドープされ、さらに、前記半導体構造にトレンチが形成され、さらに、前記トレンチの第1の側壁が前記タップの第1の側面を形成し、さらに、前記第1のドープ領域と前記ウェルとの間の界面が、前記第1の側壁と前記トレンチの底の間の角またはその近くで、前記トレンチと交差する、を含む前記方法。 - さらに、前記第1のドープ領域が実質的に前記第2のドープ領域と前記タップの前記第1の側面との間にある、請求項7に記載の方法。
- 前記トレンチを誘電体材料で充填することをさらに含む、請求項8に記載の方法。
- 前記ウェルの露出部分に別のドーパントを注入して、前記ウェルの残りの部分よりも高濃度にドープされた領域を形成することをさらに含む、請求項9に記載の方法。
- 前記タップを形成することは、前記タップの前記第1の側面と、より高濃度にドープされた前記ウェルの前記第2のドープ領域との間に残る前記第1のドープ領域の部分に前記同じ導電性ドーパントを注入することを含む、請求項8に記載の方法。
- 前記ウェルの残りの部分よりも高濃度のドープ領域上に接点を形成することをさらに含む、請求項11に記載の方法。
- 前記トレンチの底面に隣接する前記半導体構造の別の部分にドーパントを注入して、分離領域を形成することをさらに含む、請求項8に記載の方法。
- 装置であって、
第2のタイプの導電率を有する半導体構造内に形成された第1のタイプの導電率を有するウェル、及び
前記ウェルへのタップであって、前記ウェルと前記半導体構造との間の前記ウェルの境界が前記半導体構造に形成されるトレンチと交差し、前記交差は前記トレンチの角に近接して、またはその上方にあり、前記タップの活性領域は、前記ウェル内の第1のドープ領域及び第2のドープ領域を含み、前記第2のドープ領域は、同じ導電性ドーパントで前記第1のドープ領域よりも高濃度にドープされ、前記第1のドープ領域は、実質的に、前記第2のドープ領域と、前記トレンチに隣接する前記タップの側面との間にある前記ウェルへのタップを備える、前記装置。 - 前記タップの前記側面は、前記トレンチの側壁から形成される、請求項14に記載の装置。
- 前記タップの前記活性領域に結合された接点をさらに備え、前記接点は前記ウェルの上にある、請求項14に記載の装置。
- 前記第2のドープ領域に、n+ドーパントが注入され、前記第1のドープ領域にn-ドーパントが注入される、請求項14に記載の装置。
- 前記ウェル及び前記半導体構造によって形成されたp-n接合が前記トレンチの前記角に近接している、請求項14に記載の装置。
- 前記タップの前記活性領域が前記ウェルの前記境界を越えて連続している、請求項14に記載の装置。
- 前記第1のドープ領域が実質的に前記ウェルに飲み込まれている、請求項14に記載の装置。
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US20200119139A1 (en) | 2020-04-16 |
US11211382B2 (en) | 2021-12-28 |
JP2023126931A (ja) | 2023-09-12 |
KR20210055791A (ko) | 2021-05-17 |
EP3864697A1 (en) | 2021-08-18 |
JP2022504622A (ja) | 2022-01-13 |
TWI740229B (zh) | 2021-09-21 |
WO2020076638A1 (en) | 2020-04-16 |
US20210028171A1 (en) | 2021-01-28 |
CN112970111B (zh) | 2023-03-10 |
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