JP2019046793A - イオン注入装置及び半導体デバイスの製造方法 - Google Patents
イオン注入装置及び半導体デバイスの製造方法 Download PDFInfo
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- JP2019046793A JP2019046793A JP2018148458A JP2018148458A JP2019046793A JP 2019046793 A JP2019046793 A JP 2019046793A JP 2018148458 A JP2018148458 A JP 2018148458A JP 2018148458 A JP2018148458 A JP 2018148458A JP 2019046793 A JP2019046793 A JP 2019046793A
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- ion beam
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Abstract
Description
101 第1の面
102 第2の面
110 ソース領域
120 ボディ領域
122 アノード領域
128 接合終端構造
129 チャネルストッパ又はディープフィールドリング
130 ドリフト構造
131 低濃度にドープされたドリフト領域
137 フィールドストップ領域
138 フィールドストップ又は電荷補償領域
139 高濃度にドープされた接触部分
150 トレンチゲート構造
155 ゲート電極
159 ゲート誘電体
180 超接合構造
181 pドープコラム
182 nドープコラム
190 応力緩和層
210 誘電体層
310 第1の負荷電極
320 第2の負荷電極
410 吸収層
420 注入マスク
425 マスク開口部
452 概略垂直ドーパントプロファイル
453 垂直ドーパントプロファイル
456 垂直ドーパントプロファイル
457 垂直ドーパントプロファイル
471 垂直ゲルマニウムプロファイル
481 水平ドナープロファイル
482 水平アクセプタプロファイル
483 垂直ドナープロファイル
484 垂直アクセプタプロファイル
500 半導体デバイス
700 半導体基板
701 主面
702 後側の面
704 垂線
705 ベース基板
710 第1のエピタキシャル層
720 第2のエピタキシャル層
730 ドリフト層
7301 第1の部分的な層
7302 第2の部分的な層
731 ドリフト領域層
732 表面部分
733 底部部分
734 p型コラム
735 溝
736 結晶性半導体材料
737 フィールドストップ層
738 フィールドストップ又は電荷補償層
739 エミッタ層
750 低濃度にドープされた層
753 柱状構造
754 n型コラム
760 シリコン層
761 第2の基板部分
762 第1の基板部分
774 酸素含有領域
775 埋め込み酸化ケイ素層
776 第1の領域
778 第2の領域
779 エピタキシャル層
780 超接合層
900 イオン注入装置
905 イオン源
910 イオンビーム
911 ビームトラック
912 ビーム軸
920 加速ユニット
930 コリメーターユニット
950 走査制御アセンブリ
951 直線の第1の方向
952 直線の第2の方向
953 第1の偏向電極
954 第2の偏向電極
955 偏向ユニット
956 ステージアセンブリ
960 傾斜アセンブリ
980 基板ホルダ
990 制御ユニット
994 線
995 線
Claims (23)
- 注入装置であって、
第1の方向に沿って、また前記第1の方向と直交する第2の方向に沿って、イオンビームと半導体基板との間の相対的な移動をもたらすように構成された走査制御アセンブリと、
前記イオンビームのビーム軸と前記半導体基板の主面に対する垂線との間の傾斜角θを、第1の傾斜角θ1から第2の傾斜角θ2に変化させるように構成された傾斜アセンブリであって、前記第1の傾斜角θ1と前記第2の傾斜角θ2との間の角度スパンΔθは少なくとも5°である、傾斜アセンブリと、
前記傾斜アセンブリを制御して、前記イオンビームと前記半導体基板との間の前記相対的な移動の間に、前記傾斜角θを連続的に変化させるように構成された制御ユニットとを備える、注入装置。 - 前記走査制御アセンブリは、前記第1の方向に沿って、また前記第2の方向に沿って、前記イオンビームを偏向させるように構成された偏向ユニットを備える、請求項1に記載の注入装置。
- 前記第1の方向に沿った走査速度は、前記第2の方向に沿った走査速度よりも速く、前記制御ユニットは、前記第2の方向に沿った前記イオンビームの複数の上方及び下方への掃引を含む単一のイオン注入処理の間に、前記角度スパンΔθだけ前記傾斜角θを変化させるように構成される、請求項2に記載の注入装置。
- 前記走査制御アセンブリは、i)前記第1の方向に沿って前記イオンビームを偏向させるように構成された偏向ユニットと、ii)前記第2の方向に沿って前記半導体基板を移動させるように構成されたステージアセンブリとを備える、請求項1に記載の注入装置。
- 前記制御ユニットは、前記傾斜角θの関数として前記イオンビームのドーズ量を変化させるように構成される、請求項1から4のいずれか一項に記載の注入装置。
- 窒素、アルミニウム、ヒ素、リン、ホウ素、セレン、ゲルマニウム、酸素、及び硫黄イオンのうちの少なくとも1つから前記イオンビームを生成するように構成されたイオン源を更に備える、請求項1から4のいずれか一項に記載の注入装置。
- 半導体デバイスを製造する方法であって、
半導体基板の主面上にイオンビームを向けるステップであって、前記半導体基板と前記イオンビームとの間の相対的な移動により、前記イオンビームが前記主面を走査することになる、ステップと、
前記相対的な移動の間に、前記イオンビームのビーム軸と前記主面に対する垂線との間の傾斜角θを、第1の傾斜角θ1から第2の傾斜角θ2に連続的に変化させるステップであって、前記第1の傾斜角θ1と前記第2の傾斜角θ2との間の角度スパンΔθは少なくとも5°である、ステップとを含む方法。 - 偏向ユニットが、前記イオンビームを水平の第1の方向に沿って、また前記第1の方向に対して傾斜した水平な第2の方向に沿って偏向させる、請求項7に記載の方法。
- 偏向ユニットが、前記イオンビームを水平の第1の方向に沿って偏向させ、ステージアセンブリが、前記半導体基板を前記第1の方向に対して傾斜した水平な第2の方向に沿って移動させる、請求項7に記載の方法。
- 前記第1の方向に沿った走査速度は、前記第2の方向に沿った走査速度よりも速くなるように設定され、前記傾斜角θは、前記第2の方向に沿った前記イオンビームの複数の上方及び下方への掃引を含む単一のイオン注入処理の間に、前記角度スパンΔθに渡って変動する、請求項8又は9に記載の方法。
- 前記イオンビームの注入ドーズ量D(θ,t)は、前記傾斜角θ(t)の関数として制御される、請求項7から10のいずれか一項に記載の方法。
- D(θ,t)=D0/cos(θ(t))であり、D0はθ=0°での前記注入ドーズ量に等しい、請求項11に記載の方法。
- 前記イオンビームによって注入されたイオンは、前記主面に平行な第1の水平接合部から前記主面に平行な第2の水平接合部まで延びるドープされた層を形成する、請求項7から12のいずれか一項に記載の方法。
- 前記ドープされた層はドリフト層を含み、前記第1の水平接合部はpn接合部を含む、請求項13に記載の方法。
- 前記ドープされた層は、フィールドストップ又は電荷補償層を含む、請求項13又は14に記載の方法。
- 前記ドープされた層は、絶縁ゲートバイポーラトランジスタのホールエミッタ層を形成する、請求項13から15のいずれか一項に記載の方法。
- 前記注入されたイオンは、異なる拡散係数のドナー及びアクセプタを含み、前記ドリフト層に延びる溝は半導体材料で充填され、熱処理が、前記ドナー及びアクセプタのうちの少なくとも一方を前記半導体材料へ拡散させる、請求項13又は14に記載の方法。
- 前記半導体基板はシリコン結晶を含み、前記ドープされた層は、ゲルマニウムのイオン注入によって形成される、請求項13に記載の方法。
- 前記半導体基板は炭化ケイ素結晶を含む、請求項7から14のいずれか一項に記載の方法。
- 前記イオンビームを前記半導体基板に向ける前に、前記主面上に注入マスクを形成するステップを更に含む、請求項7から12のいずれか一項に記載の方法。
- 前記イオンビームは酸素イオンを含んでおり、注入された酸素を含有する前記半導体基板の部分は埋め込み酸化ケイ素層に変換され、前記方法は前記主面上にエピタキシャル層を成長させるステップを更に含む、請求項20に記載の方法。
- 注入装置であって、
第1の方向に沿って、また前記第1の方向と直交する第2の方向に沿って、イオンビームと半導体基板との間の相対的な移動をもたらすように構成された走査制御アセンブリと、
前記イオンビームのビーム軸と前記半導体基板の主面に対する垂線との間の傾斜角θを、第1の傾斜角θ1から第2の傾斜角θ2に変化させるように構成された傾斜アセンブリであって、前記第1の傾斜角θ1と前記第2の傾斜角θ2との間の角度スパンΔθは少なくとも5°である、傾斜アセンブリと、
単一のイオン注入処理中に前記傾斜アセンブリ及び前記走査制御アセンブリを制御して、前記第2の方向に沿って、異なる傾斜角で連続的な掃引を実行するように構成された制御ユニットと、を備える、注入装置。 - 前記イオンビームのイオンを加速させるように構成された加速ユニットを更に備え、前記制御ユニットは、単一のイオン注入処理中に前記加速ユニットを制御して、前記第2の方向に沿った異なる傾斜角での連続的な掃引同士の間に、前記イオンの加速度を変動させるように更に構成される、請求項22に記載の注入装置。
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