JP2013524507A - 半導体デバイスおよび方法 - Google Patents
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- H10D30/0221—Manufacture or treatment of FETs having insulated gates [IGFET] having asymmetry in the channel direction, e.g. lateral high-voltage MISFETs having drain offset region or extended-drain MOSFETs [EDMOS]
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- Insulated Gate Type Field-Effect Transistor (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Junction Field-Effect Transistors (AREA)
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Abstract
Description
Claims (20)
- ソース、ドレインおよびゲートを有するMOSトランジスタと、
前記MOSトランジスタの下に位置する条件付き浮遊埋め込み層と、
ターンオフしきい値電圧Vtを有し、ON状態にあるときに前記条件付き浮遊埋め込み層を前記ソースおよび前記ドレインのうちの一方に結合し、OFF状態にあるときは、前記埋め込み層を前記ソースおよび前記ドレインのうちの前記一方に対して実質的にフローティングのままにするように適応されたノーマリーオンスイッチと
を備える電子デバイス。 - 前記ノーマリーオンスイッチは接合型電界効果トランジスタである、請求項1に記載の電子デバイス。
- 適切にバイアスされるとき、前記MOSトランジスタは第1の導電性チャネルを有するようになっており、前記接合型電界効果トランジスタは、前記第1の導電性チャネルから横方向に離隔された第2の導電性チャネルを有するようになっている、請求項2に記載の電子デバイス。
- 適切にバイアスされるとき、前記MOSトランジスタは第1の導電性チャネルを有するようになっており、前記接合型電界効果トランジスタは、少なくとも部分的に前記第1の導電性チャネルの下に位置する第2の導電性チャネルを有するようになっている、請求項2に記載の電子デバイス。
- 前記MOSトランジスタはNチャネルトランジスタであり、前記埋め込み層はN型である、請求項1に記載の電子デバイス。
- 前記MOSトランジスタはPチャネルトランジスタであり、前記埋め込み層はN型である、請求項1に記載の電子デバイス。
- 前記MOSトランジスタはLDMOSトランジスタである、請求項1に記載の電子デバイス。
- 前記MOSトランジスタは、第1の導電性チャネルを有するようになっているLDMOSトランジスタであり、前記ノーマリーオンスイッチは、第2の導電性チャネルを有するようになっている接合型電界効果トランジスタであり、前記第1の導電性チャネルと前記第2の導電性チャネルとは実質的に直交している、請求項1に記載の電子デバイス。
- 前記MOSトランジスタは、第1の導電性チャネルを有するようになっているLDMOSトランジスタであり、前記ノーマリーオンスイッチは、第2の導電性チャネルを有するようになっている接合型電界効果トランジスタであり、前記第1の導電性チャネルと前記第2の導電性チャネルとは実質的に平行である、請求項1に記載の電子デバイス。
- ソース領域およびドレイン領域を有するLDMOSトランジスタであって、
埋め込みSC層領域と、
前記埋め込み層領域の上に位置するとともに、上側表面を有するさらなるSC領域と、
前記さらなるSC領域内に形成されるMOSFETであって、
当該LDMOSトランジスタの前記ソース領域を収容したボディ領域と、
前記ボディ領域から横方向に離隔されるとともに当該LDMOSトランジスタの前記ドレイン領域を収容したキャリアドリフト領域と
を備えるMOSFETと、
しきい値電圧|Vt|>0を有するように適応され、前記埋め込み層と、前記ソース領域および前記ドレイン領域のうちの一方との間に結合されるノーマリーオン接合型電界効果トランジスタと
を備えるLDMOSトランジスタ。 - 前記MOSFETはNチャネルMOSFETであり、前記埋め込み層はN型である、請求項10に記載のLDMOSトランジスタ。
- 前記MOSFETはPチャネルMOSFETであり、前記埋め込み層はN型である、請求項10に記載のLDMOSトランジスタ。
- 0.1≦|Vt|≦10ボルトである、請求項10に記載のLDMOSトランジスタ。
- 0.5≦|Vt|≦5ボルトである、請求項13に記載のLDMOSトランジスタ。
- 前記接合型電界効果トランジスタのチャネル領域は前記ドリフト領域と同じ導電型を有する、請求項10に記載のLDMOSトランジスタ。
- LDMOSトランジスタを製造する方法であって、
第1の導電型の埋め込みSC層領域を形成することと、
前記埋め込み層領域の上に、上側表面を有する、第2の反対導電型のさらなるSC領域を形成することと、
前記さらなるSC領域の第1の部分内に、少なくとも部分的に前記上側表面まで延在する前記第1の導電型の第1のドープ領域を形成することであって、該第1のドープ領域の第1の部分は前記LDMOSトランジスタの一部としての役割を果たすように適応され、前記第1のドープ領域の第2の部分はノーマリーオン接合型電界効果トランジスタのチャネルとしての役割を果たすように適応される、形成することと、
前記さらなるSC領域内に、実質的に前記第1のドープ領域の下に位置し且つ前記埋め込みSC層領域までは延在しない前記第2の反対導電型の第2のドープ領域を形成することと、
少なくとも部分的に前記上側表面まで延在し且つ第1の距離だけ前記第1のドープ領域から横方向に離隔される、前記第2の反対導電型の第3のドープ領域を形成することと、
前記第1のドープ領域の前記第2の部分および前記埋め込みSC層領域の双方に対する非整流性電気接触を成すシンカ領域を形成することと、
少なくとも前記第3のドープ領域と前記第1のドープ領域との間で、前記上側表面の上に導電性ゲートを形成することと
を含む方法。 - 前記第3のドープ領域内に前記LDMOSトランジスタの前記第1の導電型のソース領域、および、前記第1のドープ領域内に前記LDMOSトランジスタの前記第1の導電型のドレイン領域を形成することをさらに含み、該ドレイン領域は、前記ノーマリーオン接合型電界効果トランジスタのソース領域およびドレイン領域のうちの一方としての役割も果たすように適応され、前記ノーマリーオン接合型電界効果トランジスタのチャネルは前記第1のドープ領域の前記第2の部分によって形成される、請求項16に記載の方法。
- 前記LDMOSトランジスタはNチャネルLDMOSトランジスタであり、前記第1の導電型はN型である、請求項16に記載の方法。
- 前記LDMOSトランジスタはPチャネルLDMOSトランジスタであり、前記第1の導電型はN型である、請求項16に記載の方法。
- 前記第1のドープ領域の前記第1の部分は、前記上側表面に近接する上層の誘電体領域から第1の深さを有し、前記第1のドープ領域の前記第2の部分は前記上層の誘電体領域から、前記第1の深さよりも小さい第2の深さを有する、請求項16に記載の方法。
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US12/750,151 US8344472B2 (en) | 2010-03-30 | 2010-03-30 | Semiconductor device and method |
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PCT/US2011/024983 WO2011126609A2 (en) | 2010-03-30 | 2011-02-16 | Semiconductor device and method |
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EP2553730A2 (en) | 2013-02-06 |
CN102822975A (zh) | 2012-12-12 |
US20110241083A1 (en) | 2011-10-06 |
EP2553730B1 (en) | 2020-09-23 |
CN102822975B (zh) | 2015-07-08 |
JP5763171B2 (ja) | 2015-08-12 |
EP2553730A4 (en) | 2014-06-18 |
WO2011126609A2 (en) | 2011-10-13 |
US8344472B2 (en) | 2013-01-01 |
WO2011126609A3 (en) | 2011-11-24 |
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