JP2008511984A - チャネル層乾燥下部上部スぺーサ層が含まれる横方向場効果トランジスタおよびその加工法 - Google Patents
チャネル層乾燥下部上部スぺーサ層が含まれる横方向場効果トランジスタおよびその加工法 Download PDFInfo
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 28
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Abstract
【選択図】図1
Description
この静電容量の大きさが最小化されて切換え速度が最適化される。静電容量の合計はゲート長すなわちトランジスタのソース領域とドレイン領域の間のゲートの横方向範囲に応じて変化する。高周波場効果トランジスタはオン状態でチャネル電流が増加するだけでなくチャネルおよびゲート静電容量のキャリア乗換え時間が最小となるよう短いゲートが必要とされる。従って、ゲートが短いほどますます高い出力かつますます高い作用周波数が生じる。
および/または、b)チャネル層に隣接すると同時に、ゲート電極の少なくとも周辺にあるチャネル層と高ドーピング化第2導電型ベース層間に位置する半導体材料が含まれるスぺーサ層
曲線11により薄いドーピング断面を有するチャネル層のある先行技術によるトランジスタのチャネル層特性が示される。曲線12により中央チャネル層6がチャネル層6に隣接するスぺーサ層9、10よりも高いドーピング濃度を有する3層チャネル層構造9-6-10を持つ本発明の好ましい実施例によるトランジスタのチャネル層特性が示される。
Claims (21)
- 横方向に定間隔で配置されると同時に高ドーピング化第1導電型のソース層(4)およびドレイン領域層(5)、横方向に拡がると同時にオン状態のトランジスタのこれらの層間の電流伝導のためソース領域層(4)とドレイン領域層(5)を相互接続する低ドーピング濃度の第1導電型チャネル層(6)、およびゲート電極(7)に加えられる電位の変動により伝導あるいは遮断するチャネル層(6)特性の制御用に設置されるゲート電極(7)、並びにゲート電極(7)と少なくとも部分的に重なると同時にドレイン領域層(5)まで、ある横方向の距離にあるチャネル層(6)下に設置される高ドーピング化第2導電型ベース層(8)が含まれて前記高ドーピング化第2導電型ベース層(8)がソース領域層(4)に短絡されるとともに、以下の
a)チャネル層(6)に隣接すると同時に、少なくともゲート電極(7)の近傍においてチャネル層(6)とゲート電極(7)の間に位置する半導体材料が含まれるスぺーサ層(10)および/または
b)チャネル層(6)に隣接すると同時にゲート電極(7)の少なくとも近傍にチャネル層(6)と高ドーピング化第2導電型ベース層(8)間に位置する半導体材料が含まれるスぺーサ層(9)のうちの少なくとも1つが含まれることを特徴とする高切換え周波数向け横方向場効果トランジスタ。 - チャネル層(6)および高ドーピング化第2導電型ベース層(8)間に位置するスぺーサ層(9)がチャネル層(6)とゲート電極(7)間に位置するスぺーサ層(10)より厚いことを特徴とする請求項1に記載のトランジスタ。
- ゲート電極(7)がゲート電極(7)とチャネル層(6)間に位置するスペース層(10)内に引っ込められることを特徴とする請求項1あるいは請求項2に記載のトランジスタ。
- スぺーサ層(9、10)が高ドーピング化第2導電型ベース層(8)からドレイン領域層(5)まで延びることを特徴とする請求項1から請求項3までのいずれかに記載のトランジスタ。
- スぺーサ層(9、10)がソース領域層(4)からドレイン領域層(5)まで全体に拡がることを特徴とする請求項1から請求項3までのいずれかに記載のトランジスタ。
- トランジスタの前記層に次の、シリコン、シリコンカーバイド、IIIBニトリド群、ガリウムヒ素、あるいは任意のその他III-V半導体群のうちの半導体材料の少なくとも一つが含まれることを特徴とする請求項1から請求項5までのいずれかに記載のトランジスタ。
- トランジスタの前記層に6H、4H、3C、および15Rとして知られるシリコンカーバイドの任意の主結晶体ポリタイプが含まれることを特徴とする請求項1から請求項6までのいずれかに記載のトランジスタ。
- シリコンカーバイドがトランジスタの層を構成する半導体材料として使用される場合に第1導電型がn型であると同時に第2導電型がp型であることを特徴とする請求項1から請求項7までのいずれかに記載のトランジスタ。
- チャネル層(6)のドーピング濃度がスぺーサ層(9,10)のドーピング濃度より高いことを特徴とする請求項1から請求項8までのいずれかに記載のトランジスタ。
- シリコンカーバイドがチャネル層(6)の半導体材料として使用される場合にこの層のドーピング濃度が1〜10x1017cm-3であることを特徴とする請求項1から請求項9までのいずれかに記載のトランジスタ。
- シリコンカーバイドがチャネル層(6)の半導体材料として使用される場合にこの層の厚みが0.1〜0.3μmの間であることを特徴とする請求項1から請求項10までのいずれかに記載のトランジスタ。
- シリコンカーバイドがチャネル層(6)の半導体材料として使用される場合に該ドーピング濃度の製品およびこの層の厚み(ドーズ量)がおよそ1x1013cm-2であることを特徴とする請求項1から請求項11までのいずれかに記載のトランジスタ。
- シリコンカーバイドが高ドーピング化第2導電型ベース層(8)の半導体材料として使用される場合にこの層のドーピング剤としてアルミニウム、ベリリウムあるいはボロンがとして使用されることを特徴とする請求項1から請求項12までのいずれかに記載のトランジスタ。
- 高ドーピング化第2導電型ベース層(8)がゲート電極(7)と完全に重なることを特徴とする請求項1から請求項13までのいずれかに記載のトランジスタ。
- ゲート電極7とスぺーサ層10との間に設置されるトランジスタに絶縁層が含まれることを特徴とする請求項1から請求項14までのいずれかに記載のトランジスタ。
- 1 MHzを越える、好ましくは1GHzを越える切換え周波数向けに構成されることを特徴とする請求項1から請求項15までのいずれかに記載のトランジスタ。
- 少なくとも一つの場効果トランジスタが含まれる請求項1から請求項16までのいずれかに記載の装置。
- ゲート電極(7)がその後引き続いて形成される位置の少なくとも近傍において、パターン化された第2導電型ベース層(8)、すなわち制約された横方向拡がりを伴うベース層の上面のスぺーサ層(9)の形成、スぺーサ層(9)の上面の第1導電チャネル層(6)の形成、および/または第1導電型チャネル層(6)の上面のスぺーサ層(10)の形成段階が含まれることを特徴とする請求項1から請求項16までのいずれかに記載の横方向場効果トランジスタの製造方法。
- スぺーサ層(9,10)およびパターン化された高ドーピング化第2導電型ベース層(8)がエピタキシャルに成長することを特徴とする請求項18に記載のトランジスタの製造方法。
- 請求項1から請求項16までのいずれかに記載のトランジスタの使用あるいは1Wを越える電力が使用される切換え高周波数信号向けの請求項17に記載の装置。
- 請求項1から請求項16までのいずれかに記載のトランジスタの使用あるいはワイヤレス通信システム、デジタル放送、極超短波暖房、レーダーシステム向けの基地ステーションおよびプラズマ発生におけるといったような高電力無線周波数および極超短波の応用における請求項17に記載の装置。
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PCT/SE2004/001253 WO2006025772A1 (en) | 2004-09-01 | 2004-09-01 | Lateral field effect transistor and its fabrication comprisng a spacer layer above and below the channel layer |
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JP2008511984A true JP2008511984A (ja) | 2008-04-17 |
JP5031566B2 JP5031566B2 (ja) | 2012-09-19 |
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US (1) | US7834396B2 (ja) |
EP (1) | EP1784868B1 (ja) |
JP (1) | JP5031566B2 (ja) |
AT (1) | ATE436092T1 (ja) |
DE (1) | DE602004021975D1 (ja) |
WO (1) | WO2006025772A1 (ja) |
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---|---|---|---|---|
US7943445B2 (en) | 2009-02-19 | 2011-05-17 | International Business Machines Corporation | Asymmetric junction field effect transistor |
JP7375699B2 (ja) | 2020-07-20 | 2023-11-08 | 株式会社豊田自動織機 | 電気装置用冷却装置 |
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- 2004-09-01 DE DE602004021975T patent/DE602004021975D1/de not_active Expired - Lifetime
- 2004-09-01 EP EP04775359A patent/EP1784868B1/en not_active Expired - Lifetime
- 2004-09-01 JP JP2007529763A patent/JP5031566B2/ja not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
ATE436092T1 (de) | 2009-07-15 |
EP1784868B1 (en) | 2009-07-08 |
EP1784868A1 (en) | 2007-05-16 |
US20070262321A1 (en) | 2007-11-15 |
WO2006025772A1 (en) | 2006-03-09 |
JP5031566B2 (ja) | 2012-09-19 |
DE602004021975D1 (de) | 2009-08-20 |
US7834396B2 (en) | 2010-11-16 |
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