JP6186832B2 - 化合物半導体装置及びその製造方法 - Google Patents
化合物半導体装置及びその製造方法 Download PDFInfo
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- JP6186832B2 JP6186832B2 JP2013087736A JP2013087736A JP6186832B2 JP 6186832 B2 JP6186832 B2 JP 6186832B2 JP 2013087736 A JP2013087736 A JP 2013087736A JP 2013087736 A JP2013087736 A JP 2013087736A JP 6186832 B2 JP6186832 B2 JP 6186832B2
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Description
先ず、第1の実施形態について説明する。図1Aは、第1の実施形態に係るGaN系HEMT(化合物半導体装置)の構造を示す断面図である。
ドレイン電圧を20Vとしたときの特性を示している。図4(a)及び図4(b)を互いに比較すると、第1の実施形態において電流コラプスが抑制されていることが明確である。また、図5は参考例及び第1の実施形態のゲート−ドレイン間逆方向IV特性を示している。第1の実施形態においてリーク電流が抑制されていることが明確である。
次に、第2の実施形態について説明する。図6は、第2の実施形態に係るGaN系HEMT(化合物半導体装置)の構造を示す断面図である。
次に、第3の実施形態について説明する。図8は、第3の実施形態に係るGaN系HEMT(化合物半導体装置)の構造を示す断面図である。
次に、第4の実施形態について説明する。図9は、第4の実施形態に係るGaN系HEMT(化合物半導体装置)の構造を示す断面図である。
次に、第5の実施形態について説明する。図11は、第5の実施形態に係るGaN系HEMT(化合物半導体装置)の構造を示す断面図である。
次に、第6の実施形態について説明する。図13は、第6の実施形態に係るGaN系HEMT(化合物半導体装置)の構造を示す断面図である。
次に、第7の実施形態、第8の実施形態、第9の実施形態について説明する。図14(a)、(b)、(c)は、それぞれ、第7の実施形態、第8の実施形態、第9の実施形態に係るGaN系HEMT(化合物半導体装置)の構造を示す断面図である。
次に、第10〜第18の実施形態について説明する。図15(a)、(b)、(c)は、それぞれ、第10の実施形態、第11の実施形態、第12の実施形態に係るGaN系HEMT(化合物半導体装置)の構造を示す断面図である。図16(a)、(b)、(c)は、それぞれ、第13の実施形態、第14の実施形態、第15の実施形態に係るGaN系HEMT(化合物半導体装置)の構造を示す断面図である。図17(a)、(b)、(c)は、それぞれ、第16の実施形態、第17の実施形態、第18の実施形態に係るGaN系HEMT(化合物半導体装置)の構造を示す断面図である。
第19の実施形態は、GaN系HEMTのディスクリートパッケージに関する。図18は、第19の実施形態に係るディスクリートパッケージを示す図である。
次に、第20の実施形態について説明する。第20の実施形態は、GaN系HEMTを備えたPFC(Power Factor Correction)回路に関する。図19は、第20の実施形態に係るPFC回路を示す結線図である。
次に、第21の実施形態について説明する。第21の実施形態は、GaN系HEMTを備えた電源装置に関する。図20は、第21の実施形態に係る電源装置を示す結線図である。
次に、第22の実施形態について説明する。第22の実施形態は、GaN系HEMTを備えた増幅器に関する。図21は、第22の実施形態に係る増幅器を示す結線図である。
基板と、
前記基板上方に形成された窒化物の化合物半導体積層構造と、
前記化合物半導体積層構造を覆うパッシベーション膜と、
前記化合物半導体積層構造上方に形成されたゲート電極、ソース電極及びドレイン電極と、
Si−C結合を含有し、前記ソース電極と前記ドレイン電極との間において、前記化合物半導体積層構造の上面の少なくとも一部又は前記パッシベーション膜の上面の少なくも一部と接する部分を有するSi−C結合含有膜と、
を有することを特徴とする化合物半導体装置。
前記Si−C結合含有膜は、厚さ方向において前記ゲート電極の前記ドレイン電極側の端部と前記化合物半導体積層構造との間に位置する部分を有することを特徴とする付記1に記載の化合物半導体装置。
前記化合物半導体積層構造はガリウム原子を含有し、
前記Si−C結合含有膜と前記化合物半導体積層構造との間に、酸素原子を介したシリコン原子とガリウム原子との結合が存在することを特徴とする付記1又は2に記載の化合物半導体装置。
前記パッシベーション膜はシリコン原子を含有し、
前記Si−C結合含有膜と前記パッシベーション膜との間に、酸素原子を介したシリコン原子とシリコン原子との結合が存在することを特徴とする付記1乃至3のいずれか1項に記載の化合物半導体装置。
前記Si−C結合含有膜は、前記ゲート電極又は前記ドレイン電極の少なくとも一方から電気的に絶縁されていることを特徴とする付記1乃至4のいずれか1項に記載の化合物半導体装置。
前記ソース電極に接続され、前記ゲート電極と前記ドレイン電極との間まで延在するフィールドプレートを有し、
前記Si−C結合含有膜は、厚さ方向において前記フィールドプレートの前記ドレイン電極側の端部と前記化合物半導体積層構造との間に位置する部分を有することを特徴とする付記1乃至5のいずれか1項に記載の化合物半導体装置。
前記Si−C結合含有膜は、メチル基を含有することを特徴とする付記1乃至6のいずれか1項に記載の化合物半導体装置。
前記Si−C結合含有膜は、水酸基を含有することを特徴とする付記1乃至7のいずれか1項に記載の化合物半導体装置。
付記1乃至8のいずれか1項に記載の化合物半導体装置を有することを特徴とする電源装置。
付記1乃至8のいずれか1項に記載の化合物半導体装置を有することを特徴とする増幅器。
基板上方に窒化物の化合物半導体積層構造を形成する工程と、
前記化合物半導体積層構造を覆うパッシベーション膜を形成する工程と、
前記化合物半導体積層構造上方にゲート電極、ソース電極及びドレイン電極を形成する工程と、
Si−C結合を含有し、前記ソース電極と前記ドレイン電極との間において、前記化合物半導体積層構造の上面の少なくとも一部又は前記パッシベーション膜の上面の少なくも一部と接する部分を有するSi−C結合含有膜を形成する工程と、
を有することを特徴とする化合物半導体装置の製造方法。
前記Si−C結合含有膜は、厚さ方向において前記ゲート電極の前記ドレイン電極側の端部と前記化合物半導体積層構造との間に位置する部分を有することを特徴とする付記11に記載の化合物半導体装置の製造方法。
前記Si−C結合含有膜を形成する工程は、
化学合成スピンオングラス剤を塗布する工程と、
前記化学合成スピンオングラス剤をキュアする工程と、
を有することを特徴とする付記11又は12に記載の化合物半導体装置の製造方法。
前記ソース電極に接続され、前記ゲート電極と前記ドレイン電極との間まで延在するフィールドプレートを形成する工程を有し、
前記Si−C結合含有膜は、厚さ方向において前記フィールドプレートの前記ドレイン電極側の端部と前記化合物半導体積層構造との間に位置する部分を有することを特徴とする付記11乃至13のいずれか1項に記載の化合物半導体装置の製造方法。
前記化合物半導体積層構造はガリウム原子を含有し、
前記Si−C結合含有膜と前記化合物半導体積層構造との間に、酸素原子を介したシリコン原子とガリウム原子との結合が存在することを特徴とする付記11乃至14のいずれか1項に記載の化合物半導体装置の製造方法。
前記パッシベーション膜はシリコン原子を含有し、
前記Si−C結合含有膜と前記パッシベーション膜との間に、酸素原子を介したシリコン原子とシリコン原子との結合が存在することを特徴とする付記11乃至15のいずれか1項に記載の化合物半導体装置の製造方法。
前記Si−C結合含有膜は、前記ゲート電極又は前記ドレイン電極の少なくとも一方から電気的に絶縁されていることを特徴とする付記11乃至16のいずれか1項に記載の化合物半導体装置の製造方法。
12:化合物半導体積層構造
13:ゲート電極
14s:ソース電極
14d:ドレイン電極
17:パッシベーション膜
116、216、416、516、716、816、916:Si−C結合含有膜
Claims (7)
- 基板と、
前記基板上方に形成された窒化物の化合物半導体積層構造と、
前記化合物半導体積層構造を覆うパッシベーション膜と、
前記化合物半導体積層構造上方に形成されたゲート電極、ソース電極及びドレイン電極と、
Si−C結合を含有し、前記ソース電極と前記ドレイン電極との間において、前記化合物半導体積層構造の上面の少なくとも一部又は前記パッシベーション膜の上面の少なくとも一部と接する部分を有するSi−C結合含有膜と、
を有し、
前記Si−C結合含有膜及び前記パッシベーション膜は、前記ゲート電極のドレイン端直下の部分を有し、
前記Si−C結合含有膜は、前記ゲート電極のドレイン端直下で前記化合物半導体積層構造の上面と接し、
前記Si−C結合含有膜は、前記ゲート電極又は前記ドレイン電極の少なくとも一方から電気的に絶縁されていることを特徴とする化合物半導体装置。 - 前記化合物半導体積層構造はガリウム原子を含有し、
前記Si−C結合含有膜と前記化合物半導体積層構造との間に、酸素原子を介したシリコン原子とガリウム原子との結合が存在することを特徴とする請求項1に記載の化合物半導体装置。 - 前記パッシベーション膜はシリコン原子を含有し、
前記Si−C結合含有膜と前記パッシベーション膜との間に、酸素原子を介したシリコン原子とシリコン原子との結合が存在することを特徴とする請求項1又は2に記載の化合物半導体装置。 - 請求項1乃至3のいずれか1項に記載の化合物半導体装置を有することを特徴とする電源装置。
- 請求項1乃至3のいずれか1項に記載の化合物半導体装置を有することを特徴とする増幅器。
- 基板上方に窒化物の化合物半導体積層構造を形成する工程と、
前記化合物半導体積層構造を覆うパッシベーション膜を形成する工程と、
前記化合物半導体積層構造上方にゲート電極、ソース電極及びドレイン電極を形成する工程と、
Si−C結合を含有し、前記ソース電極と前記ドレイン電極との間において、前記化合物半導体積層構造の上面の少なくとも一部又は前記パッシベーション膜の上面の少なくとも一部と接する部分を有するSi−C結合含有膜を形成する工程と、
を有し、
前記Si−C結合含有膜及び前記パッシベーション膜は、前記ゲート電極のドレイン端直下の部分を有し、
前記Si−C結合含有膜は、前記ゲート電極のドレイン端直下で前記化合物半導体積層構造の上面と接し、
前記Si−C結合含有膜は、前記ゲート電極又は前記ドレイン電極の少なくとも一方から電気的に絶縁されていることを特徴とする化合物半導体装置の製造方法。 - 前記Si−C結合含有膜を形成する工程は、
化学合成スピンオングラス剤を塗布する工程と、
前記化学合成スピンオングラス剤をキュアする工程と、
を有することを特徴とする請求項6に記載の化合物半導体装置の製造方法。
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