JP2018182313A - dV/dt可制御性を有するIGBT - Google Patents
dV/dt可制御性を有するIGBT Download PDFInfo
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- JP2018182313A JP2018182313A JP2018059181A JP2018059181A JP2018182313A JP 2018182313 A JP2018182313 A JP 2018182313A JP 2018059181 A JP2018059181 A JP 2018059181A JP 2018059181 A JP2018059181 A JP 2018059181A JP 2018182313 A JP2018182313 A JP 2018182313A
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Abstract
Description
G=制御トレンチ14
D=ダミートレンチ15
S=ソーストレンチ16
F=浮遊トレンチ17
k=活性メサ18
o=不活性メサ19
例示的な近傍関係#1:kGkSoSoDoDoSoS
例示的な近傍関係#2:kGkSoFoDoDoDoDoFoS
例示的な近傍関係#3:kGkSoSoDoDoSoS
1−1 電力ユニットセル
1−2 活性領域
1−3 不活性終端構造
1−4 チップ縁部
10 半導体本体
11 第1の負荷端子
12 第2の負荷端子
13 制御端子
14 制御トレンチ
15 さらなるトレンチ
16 ソーストレンチ
17 浮遊トレンチ
18 活性メサ
19 不活性メサ
100 ドリフト領域
101 ソース領域
102 チャネル領域
105 半導体バリア領域
108 ドープ接触領域
111 接触プラグ
112 電気絶縁部
132 絶縁構造体
141 制御電極
142 絶縁体
144 側壁
145 底部
151 さらなるトレンチ電極
152 絶縁体
154 側壁
155 底部
161 ソーストレンチ電極
162 絶縁体
164 側壁
171 トレンチ電極
172 絶縁体
174 側壁
181 移行部
191 移行部
1021 第1のpn接合
1051 上部pn接合
1052 下部pn接合
1053 凹部
Claims (20)
- IGBT(1)であって、
− 前記IGBT(1)の第1の負荷端子(11)および第2の負荷端子(12)に結合され、かつ前記端子(11、12)間において負荷電流を導通するように構成されたドリフト領域(100)を含む半導体本体(10)であって、前記ドリフト領域(100)は、第1の導電型のドーパントを含む、半導体本体(10)と、
− 少なくとも1つの電力ユニットセル(1−1)であって、
− 制御トレンチ電極(141)を有する少なくとも1つの制御トレンチ(14)、および前記制御トレンチ電極に結合されたさらなるトレンチ電極(151)を有する少なくとも1つのさらなるトレンチ(15)、
− 前記第1の導電型のドーパントを有し、かつ前記第1の負荷端子(11)に電気接続されたソース領域(101)、および第2の導電型のドーパントを有し、かつ前記ソース領域(101)と前記ドリフト領域(100)とを分離するチャネル領域(102)を含む少なくとも1つの活性メサ(18)であって、前記活性メサ(18)内において、前記ソース領域(101)、前記チャネル領域(102)および前記ドリフト領域(100)の各々の少なくともそれぞれの区画は、前記制御トレンチ(14)の側壁(144)に隣接して配置されており、前記制御トレンチ電極(141)は、前記IGBT(1)の制御端子(13)から制御信号を受信し、かつ前記活性メサ(18)内の前記負荷電流を制御するように構成されており、前記さらなるトレンチ電極(151)は、前記負荷電流を制御するように構成されていない、少なくとも1つの活性メサ(18)、および
− 前記半導体本体(10)内に実装され、かつ前記第2の導電型のドーパントを含む、電気的に浮遊している半導体バリア領域(105)であって、前記活性メサ(18)および前記さらなるトレンチ(15)の底部(155)の両方と横方向に重なる、電気的に浮遊している半導体バリア領域(105)
を含む、少なくとも1つの電力ユニットセル(1−1)と
を含む、IGBT(1)。 - − 前記少なくとも1つの電力ユニットセル(1−1)は、前記少なくとも1つのさらなるトレンチ(15)に隣接して配置された少なくとも1つの不活性メサ(19)をさらに含み、前記第1の負荷端子(11)と前記不活性メサ(19)との間の移行部(191)は、少なくとも前記第1の導電型の電荷キャリアに対する電気絶縁部(112)を提供し、および/または
− 前記さらなるトレンチ(15)の前記底部(155)および前記制御トレンチ(14)の底部(145)の両方は、前記バリア領域(105)内へ延びる、請求項1に記載のIGBT(1)。 - 前記バリア領域(105)は、前記活性メサ(18)の幅の少なくとも50%について前記活性メサ(18)と横方向に重なる、請求項1または2に記載のIGBT(1)。
- IGBT(1)であって、
− 前記IGBT(1)の第1の負荷端子(11)および第2の負荷端子(12)に結合され、かつ前記端子(11、12)間において負荷電流を導通するように構成されたドリフト領域(100)を含む半導体本体(10)であって、前記ドリフト領域(100)は、第1の導電型のドーパントを含む、半導体本体(10)と、
− 少なくとも1つの電力ユニットセル(1−1)であって、
− 制御トレンチ電極(141)を有する少なくとも1つの制御トレンチ(14)、およびさらなるトレンチ電極(151)を有する少なくとも1つのさらなるトレンチ(15)、
− 前記第1の導電型のドーパントを有し、かつ前記第1の負荷端子(11)に電気接続されたソース領域(101)、および第2の導電型のドーパントを有し、かつ前記ソース領域(101)と前記ドリフト領域(100)とを分離するチャネル領域(102)を含む少なくとも1つの活性メサ(18)であって、前記活性メサ(18)内において、前記ソース領域(101)、前記チャネル領域(102)および前記ドリフト領域(100)の各々の少なくともそれぞれの区画は、前記制御トレンチ(14)の側壁(144)に隣接して配置されており、前記制御トレンチ電極(141)は、前記IGBT(1)の制御端子(13)から制御信号を受信し、かつ前記活性メサ(18)内の前記負荷電流を制御するように構成されている、少なくとも1つの活性メサ(18)、および
− 前記半導体本体(10)内に実装され、かつ前記第2の導電型のドーパントを含む、電気的に浮遊している半導体バリア領域(105)であって、前記活性メサ(18)の全幅および前記さらなるトレンチ(15)の底部(155)の両方と横方向に重なる、電気的に浮遊している半導体バリア領域(105)
を含む、少なくとも1つの電力ユニットセル(1−1)と
を含む、IGBT(1)。 - IGBT(1)であって、
− 前記IGBT(1)の第1の負荷端子(11)および第2の負荷端子(12)に結合され、かつ前記端子(11、12)間において負荷電流を導通するように構成されたドリフト領域(100)を含む半導体本体(10)であって、前記ドリフト領域(100)は、第1の導電型のドーパントを含む、半導体本体(10)と、
− 少なくとも1つの電力ユニットセル(1−1)であって、
− 制御トレンチ電極(141)を有する少なくとも1つの制御トレンチ(14)、およびさらなるトレンチ電極(151)を有する少なくとも1つのさらなるトレンチ(15)、
− 前記第1の導電型のドーパントを有し、かつ前記第1の負荷端子(11)に電気接続されたソース領域(101)、および第2の導電型のドーパントを有し、かつ前記ソース領域(101)と前記ドリフト領域(100)とを分離するチャネル領域(102)を含む少なくとも1つの活性メサ(18)であって、前記活性メサ(18)内において、前記ソース領域(101)、前記チャネル領域(102)および前記ドリフト領域(100)の各々の少なくともそれぞれの区画は、前記制御トレンチ(14)の側壁(144)に隣接して配置されており、前記制御トレンチ電極(141)は、前記IGBT(1)の制御端子(13)から制御信号を受信し、かつ前記活性メサ(18)内の前記負荷電流を制御するように構成されている、少なくとも1つの活性メサ(18)、および
− 前記少なくとも1つのさらなるトレンチ(15)に隣接して配置された少なくとも1つの不活性メサ(19)であって、前記第1の負荷端子(11)と前記不活性メサ(19)との間の移行部(191)は、少なくとも前記第1の導電型の電荷キャリアに対する電気絶縁部(112)を提供する、少なくとも1つの不活性メサ(19)
を含む、少なくとも1つの電力ユニットセル(1−1)と、
− 前記半導体本体(10)内に実装され、かつ前記第2の導電型のドーパントを含む半導体バリア領域(105)であって、
− 前記制御トレンチ(14)および前記さらなるトレンチ(15)の両方のそれぞれの下方部分(LP)は、前記バリア領域(105)内へ延び、各下方部分(LP)は、前記それぞれのトレンチ(14、15)の最も深い5分の1の部分によって形成されており、
− 前記制御トレンチ(14)および前記さらなるトレンチ(15)の両方のそれぞれの上方部分(UP)は、前記それぞれのトレンチ(14、15)の残りの5分の4の部分によって形成されており、前記制御トレンチ(14)の前記上方部分(UP)は、前記ソース領域(101)および前記チャネル領域(102)に隣接して配置されており、
− 総計の活性交差エリア(AIA)は、前記制御トレンチ(14)の前記下方部分(LP)と前記バリア領域(105)との間の移行部によって画定され、および
総計のさらなる交差エリア(DIA)は、前記さらなるトレンチ(15)の前記下方部分(LP)と前記バリア領域(105)との間の移行部によって画定され、および
総計のチャネル交差エリア(CIA)は、前記制御トレンチ(15)の前記上方部分(UP)と、前記活性メサ(18)内の前記ソース領域(101)および前記チャネル領域(102)の両方によって形成された部分領域との間の移行部によって画定され、および
− 前記総計のチャネル交差エリア(CIA)は、前記活性交差エリア(AIA)と前記さらなる交差エリア(DIA)との和よりも小さい、半導体バリア領域(105)と
を含む、IGBT(1)。 - 前記バリア領域(105)は、電気的に浮遊している、請求項5に記載のIGBT(1)。
- 前記少なくとも1つのさらなるトレンチ(15)は、ダミートレンチであり、前記さらなるトレンチ電極(151)は、ダミートレンチ電極であり、前記制御トレンチ電極(141)および前記ダミートレンチ電極(151)の両方は、前記制御端子(13)にそれぞれ電気結合されている、請求項1〜6のいずれか一項に記載のIGBT(1)。
- 前記バリア領域(105)は、前記活性メサ(18)の区画と前記さらなるトレンチ(15)の前記底部(155)との間の導電経路を提供するように構成されている、請求項1〜7のいずれか一項に記載のIGBT(1)。
- 前記バリア領域(105)は、前記ドリフト領域(100)との上部pn接合(1051)および下部pn接合(1052)の各々を形成し、前記下部pn接合(1052)は、前記さらなるトレンチ(15)の前記底部(155)および前記制御トレンチ(14)の底部(145)の両方よりも低く配置されている、請求項1〜8のいずれか一項に記載のIGBT(1)。
- 前記上部pn接合(1051)は、前記活性メサ(18)内および任意選択的に前記不活性メサ(19)内に配置されている、請求項9に記載のIGBT(1)。
- 前記上部pn接合(1051)は、前記さらなるトレンチ(15)の前記底部(155)および前記制御トレンチ(14)の底部(145)の両方よりも低く配置されており、前記さらなるトレンチ(15)の前記底部(155)と前記上部pn接合(1051)との間の延長方向(Z)に沿った距離は、3μmよりも小さい、請求項10に記載のIGBT(1)。
- 前記バリア領域(105)は、前記IGBT(1)の活性セルフィールド(1−2)内の連続したバリア層として実装されている、請求項1〜11のいずれか一項に記載のIGBT(1)。
- 前記バリア領域(105)は、1つ以上の凹部(1053)を含み、前記ドリフト領域(100)は、前記1つ以上の凹部(1053)の各々の中へ完全に延び、前記1つ以上の凹部(1053)は、前記活性メサ(18)と横方向に重なる、請求項12に記載のIGBT(1)。
- 前記バリア領域(105)は、1e14cm−3よりも大きくかつ1e18cm−3よりも小さいドーパント濃度(CC)を呈する、請求項1〜13のいずれか一項に記載のIGBT(1)。
- 前記ドーパント濃度は、少なくとも0.5μmの延長方向(Z)に沿った延長を有して存在する、請求項14に記載のIGBT(1)。
- 前記バリア領域(105)は、前記さらなるトレンチ(15)の前記底部(155)が前記バリア領域(105)内へ延びる領域内において最大ドーパント濃度(CC)を呈する、請求項1〜15のいずれか一項に記載のIGBT(1)。
- 前記バリア領域(105)は、10Ωcmよりも大きくかつ1000Ωcmよりも小さい抵抗率を呈する、請求項1〜16のいずれか一項に記載のIGBT(1)。
- 前記バリア領域(105)は、前記ドリフト領域(100)の少なくとも一部分によって前記チャネル領域(102)から分離されている、請求項1〜17のいずれか一項に記載のIGBT(1)。
- 前記電力ユニットセル(1−1)は、
− ソーストレンチ電極(161)を有する少なくとも1つのソーストレンチ(16)であって、前記ソーストレンチ電極(161)は、前記第1の負荷端子(11)に電気接続されており、任意選択的に、前記少なくとも1つのソーストレンチ(16)は、前記制御トレンチ(14)と前記さらなるトレンチ(15)との間に配置されており、任意選択的に、前記活性メサ(18)は、前記制御トレンチ(14)および前記ソーストレンチ(16)によって横方向に閉じ込められており、任意選択的に、前記不活性メサ(19)は、前記ソーストレンチ(16)および前記さらなるトレンチ(15)によって横方向に閉じ込められている、少なくとも1つのソーストレンチ(16)、および/または
− トレンチ電極(171)を有する少なくとも1つの浮遊トレンチ(17)であって、前記浮遊トレンチ(17)の前記トレンチ電極(171)は、電気的に浮遊しており、任意選択的に、前記少なくとも1つの浮遊トレンチ(17)は、前記制御トレンチ(14)と前記さらなるトレンチ(15)との間に配置されている、少なくとも1つの浮遊トレンチ(17)
をさらに含む、請求項1〜18のいずれか一項に記載のIGBT(1)。 - 複数の電力ユニットセル(1−1)を含み、前記バリア領域(105)は、前記複数の電力ユニットセル(1−1)内に含まれる前記不活性メサ(19)を互いに接続する、請求項1〜19のいずれか一項に記載のIGBT(1)。
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US10439055B2 (en) | 2019-10-08 |
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JP7107715B2 (ja) | 2022-07-27 |
US20180286971A1 (en) | 2018-10-04 |
CN108695381B (zh) | 2024-03-15 |
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US20200006539A1 (en) | 2020-01-02 |
KR102553464B1 (ko) | 2023-07-11 |
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US10930772B2 (en) | 2021-02-23 |
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