JP4439976B2 - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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- JP4439976B2 JP4439976B2 JP2004108304A JP2004108304A JP4439976B2 JP 4439976 B2 JP4439976 B2 JP 4439976B2 JP 2004108304 A JP2004108304 A JP 2004108304A JP 2004108304 A JP2004108304 A JP 2004108304A JP 4439976 B2 JP4439976 B2 JP 4439976B2
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Description
図1は、本実施形態に係る半導体装置の構成を模式的に示す断面図である。図1の半導体装置100は、シリコン基板101、エッチングストッパ膜109、最下層絶縁膜111、第一配線層絶縁膜113の積層構造を有し、シリコン基板101、エッチングストッパ膜109、および最下層絶縁膜111を貫通する貫通電極135が設けられている。
まず、半導体装置100においては、貫通電極135が小径プラグ119および大径プラグ131の二つのプラグからなる。小径プラグ119の端部の突出部141は、大径プラグ131に内包されている。
図3は、本実施形態に係る半導体装置の構成を模式的に示す断面図である。図3に示した半導体装置102においては、大径プラグ131の上面がシリコン基板101の上面すなわち素子形成面に一致している。また、半導体装置102では、図1に示したシリコン基板101における電着絶縁膜129に代わり、大径プラグ131の側面にSiN膜143が形成され、シリコン基板101の裏面にSiN膜145が形成されている。
図5は、本実施形態に係る半導体装置の構成を模式的に示す断面図である。図5に示した半導体装置104においては、大径プラグ131の周囲を覆うSiO2リング151が設けられている。SiO2リング151は、大径プラグ131の側面において、SiN膜143に接して設けられている。SiO2リング151の側面は、SiN膜143を介してシリコン基板101に接している。また、第二の実施形態と同様に、シリコン基板101の裏面にSiN膜149が設けられている。
101 シリコン基板
102 半導体装置
103 素子分離膜
104 半導体装置
105 拡散層
107 ゲート電極
109 エッチングストッパ膜
112 配線用絶縁膜
113 第一配線層絶縁膜
114 プラグ用絶縁膜
115 粘着剤層
117 支持体
119 小径プラグ
121 第一配線
122 接続プラグ
123 接続プラグ
125 パッド
127 バンプ
129 電着絶縁膜
131 大径プラグ
133 めっき膜
135 貫通電極
137 SiN膜
139 開口部
141 突出部
142 突出部
143 SiN膜
145 SiN膜
147 SiO2膜
149 SiN膜
151 SiO2リング
153 配線
154 配線
155 ウエハ
157 ダイシングライン
159 貫通溝
161 絶縁層
163 絶縁層
165 配線
167 接続プラグ
169 配線
171 接続プラグ
Claims (15)
- 半導体基板と、
前記半導体基板の素子形成面に設けられた絶縁層と、
前記半導体基板を貫通し、前記絶縁層の内部に設けられた導電部材と接続する貫通電極と、
を有し、
前記貫通電極は、
前記導電部材と接続し、前記半導体基板側の端部が前記半導体基板の中に位置する第一の導電プラグと、
前記半導体基板に設けられ、前記半導体基板の裏面から前記半導体基板の前記素子形成面に向かって形成され、前記第一の導電プラグの断面積よりも大きい断面積を有し、前記第一の導電プラグの前記半導体基板側の端部を内包する第二の導電プラグと、
を有することを特徴とする半導体装置。 - 請求項1に記載の半導体装置において、複数の前記第一の導電プラグが、一つの前記第二の導電プラグと電気的に接続されるように構成されたことを特徴とする半導体装置。
- 請求項1又は2に記載の半導体装置において、前記第二の導電プラグが前記半導体基板の前記裏面から前記半導体基板の前記素子形成面の近傍にわたって形成されていることを特徴とする半導体装置。
- 請求項1乃至3いずれかに記載の半導体装置において、前記第一の導電プラグの前記半導体基板側の端部が前記第二の導電プラグに貫入していることを特徴とする半導体装置。
- 請求項1乃至4いずれかに記載の半導体装置において、前記第二の導電プラグと前記半導体基板とが絶縁膜を介して接していることを特徴とする半導体装置。
- 請求項1乃至5いずれかに記載の半導体装置において、前記第二の導電プラグが前記半導体基板の前記裏面から突出していることを特徴とする半導体装置。
- 請求項1乃至6いずれかに記載の半導体装置において、前記第二の導電プラグの側面外周に環筒状絶縁体が配設されたことを特徴とする半導体装置。
- 請求項1乃至7いずれかに記載の半導体装置において、前記半導体基板の前記素子形成面における前記貫通電極の断面積が、前記半導体基板の前記裏面における前記貫通電極の断面積よりも小さいことを特徴とする半導体装置。
- 半導体基板の素子形成面の側に、前記素子形成面から前記半導体基板の途中まで伸びる第一の孔を形成する工程と、
前記第一の孔の内壁に、絶縁材料からなるバリア膜を形成する工程と、
前記第一の孔の内部を埋め込むように第一の金属膜を埋設する工程と、
前記第一の孔の外部に形成された前記第一の金属膜を除去し、前記第一の孔の内部に第一の導電プラグを形成する工程と、
裏面の側から前記半導体基板を選択的に除去することにより、前記裏面から前記素子形成面に向かって伸びていて前記第一の孔より断面積が小さい第二の孔を形成し、前記第二の孔の内部に前記第一の導電プラグの一部を露出させる工程と、
露出した前記バリア膜の少なくとも一部を除去し、前記第一の金属膜を露出させる工程と、
第一の金属膜を露出させる前記工程の後、前記第二の孔を埋めるように第二の金属膜を成長させて、前記第一の導電プラグの一部を内包する第二の導電プラグを形成する工程と、
を含むことを特徴とする半導体装置の製造方法。 - 請求項9に記載の半導体装置の製造方法において、
第一の孔を形成する前記工程の前に、前記素子形成面の側から前記半導体基板を選択的に除去して環筒状の孔を形成し、前記孔の内部に絶縁体を埋設して環筒状絶縁体を形成する工程を含み、
第一の孔を形成する前記工程は、前記半導体基板の前記環筒状絶縁体の内側の領域の一部を除去して前記第一の孔を形成する工程を含み、
第二の孔を形成する前記工程は、前記半導体基板の前記環筒状絶縁体の内側の領域の少なくとも一部を除去して前記第二の孔を形成する工程を含むことを特徴とする半導体装置の製造方法。 - 請求項9または10に記載の半導体装置の製造方法において、第一の孔を形成する前記工程は、前記半導体基板の前記素子形成面の側に絶縁膜を形成した後、前記絶縁膜および前記半導体基板を選択的に除去して前記第一の孔を形成する工程を含むことを特徴とする半導体装置の製造方法。
- 半導体基板の素子形成面の側から前記半導体基板を選択的に除去して孔を形成し、前記孔の内部に絶縁体を埋設し絶縁プラグを形成する工程と、
前記半導体基板の前記素子形成面の側に、前記絶縁プラグの一部が選択的に除去された第一の孔を、断面積が前記絶縁プラグより小さくなるように形成する工程と、
前記第一の孔の内部を埋め込むように第一の金属膜を埋設する工程と、
前記第一の孔の外部に形成された前記第一の金属膜を除去し、前記第一の孔の内部に第一の導電プラグを形成する工程と、
前記半導体基板の裏面全面を一部除去し、前記絶縁プラグの下面を露出させる工程と、
半導体基板の裏面を除去する前記工程の後、前記絶縁プラグを前記半導体基板の裏面側から選択的に除去して前記第一の孔より断面積が大きい第二の孔を形成し、前記第二の孔の内部に前記第一の導電プラグの一部を露出させる工程と、
前記第二の孔を埋めるように第二の金属膜を成長させて、前記第一の導電プラグの一部を内包する第二の導電プラグを形成する工程と、
を含むことを特徴とする半導体装置の製造方法。 - 請求項12に記載の半導体装置の製造方法において、第一の孔を形成する前記工程は、前記半導体基板の前記素子形成面の側に絶縁膜を形成した後、前記絶縁膜および前記絶縁プラグを選択的に除去して前記第一の孔を形成する工程を含むことを特徴とする半導体装置の製造方法。
- 請求項9乃至13いずれかに記載の半導体装置の製造方法において、
第一の導電プラグを形成する前記工程の後、前記素子形成面の上部に、前記第一の導電プラグに接続する配線を有する配線層を形成する工程を含むことを特徴とする半導体装置の製造方法。 - 請求項9乃至14いずれかに記載の半導体装置の製造方法において、
第一の孔を形成する前記工程の前に、前記半導体基板の前記素子形成面の上部に設けられた絶縁層を設ける工程を有し、
第一の導電プラグを形成する前記工程は、前記絶縁層の内部に、前記第一の導電プラグと同時にトランジスタ素子へ接続する接続プラグを形成する工程を含むことを特徴とする半導体装置の製造方法。
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JP2005294577A (ja) | 2005-10-20 |
US8704355B2 (en) | 2014-04-22 |
US8310039B2 (en) | 2012-11-13 |
US20090215261A1 (en) | 2009-08-27 |
US20050221601A1 (en) | 2005-10-06 |
US7541677B2 (en) | 2009-06-02 |
US20130032930A1 (en) | 2013-02-07 |
CN100390981C (zh) | 2008-05-28 |
US8008191B2 (en) | 2011-08-30 |
US8022529B2 (en) | 2011-09-20 |
CN101202257A (zh) | 2008-06-18 |
US20110316124A1 (en) | 2011-12-29 |
TW200535977A (en) | 2005-11-01 |
TWI253103B (en) | 2006-04-11 |
CN1677658A (zh) | 2005-10-05 |
CN101202257B (zh) | 2010-08-25 |
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