JP4399258B2 - 超薄垂直ボデイトランジスタを有するオープンビットラインdram - Google Patents
超薄垂直ボデイトランジスタを有するオープンビットラインdram Download PDFInfo
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Description
ラー上にポリシリコン層を堆積させ、ポリシリコン層に方向性エッチングを施してピラーの側壁上だけにポリシリコン層の一部が残るようにし、ポリシリコン層にアニーリングを施して、ポリシリコン層をエピタキシャル再成長させ、第1及び第2の半導体コンタクト層からポリシリコン層内へドーパントを拡散させて、極薄垂直ボデイ領域により分離された第1及び第2の極薄垂直ソース/ドレイン領域を形成し、極薄垂直ボデイ領域上にゲート絶縁層を形成し、ゲート絶縁層上にゲートを形成するステップを含み、アレイの各メモリセルを形成するステップは、さらに、第2の半導体コンタクト層と結合するキャパシタを形成するステップを含み、DRAMデバイス形成方法は、さらに、メモリセルアレイの各行の隣接するピラーの第1のコンタクト層を相互接続するためにピラーの下方に半導体材料の複数の埋め込みビットラインを形成するステップと、ピラーの列間のトレンチに隣接する垂直トランジスタの極薄垂直ボデイ領域にアドレスするために各々がトレンチ内を複数の埋め込みビットラインに対して直角に延びる複数のワードラインを形成するステップとを含む、オープンビットラインDRAMデバイスの形成方法も提供される。
Claims (13)
- オープンビットラインDRAMデバイスであって、
行列状に形成されたメモリセルのアレイを有し、
メモリセルアレイの各メモリセルは、
半導体基板から外方に延び、酸化物層より分離された第1の半導体コンタクト層及び第2の半導体コンタクト層を有するピラーと、
ピラーの側部に沿って形成された垂直トランジスタと、
ピラーの第2の半導体コンタクト層と結合するキャパシタとを含み、
垂直トランジスタは、
第1の半導体コンタクト層に結合された第1の極薄垂直ソース/ドレイン領域と、
第2の半導体コンタクト層に結合された第2の極薄垂直ソース/ドレイン領域と、
酸化物層に対向し、第1と第2の極薄垂直ソース/ドレイン領域を結合する極薄垂直ボデイ領域と、
極薄垂直ボデイ領域上のゲート絶縁層と、
ゲート絶縁層上のゲートとより成り、
さらに、半導体材料により形成され、メモリセルアレイの各行の隣接するピラーの第1の半導体コンタクト層を相互接続するためにピラーの下方に位置する複数の埋め込みビットラインと、
各々がピラーの列間のトレンチに隣接する垂直トランジスタの極薄垂直ボデイ領域にアドレスするためにトレンチ内を複数の埋め込みビットラインに対して直角に延びる複数のワードラインとより成るオープンビットラインDRAMデバイス。 - 極薄垂直ボデイ領域は固相エピタキシャル成長により形成される請求項1のオープンビットラインDRAMデバイス。
- 極薄垂直ボデイ領域はp型チャンネルを有する請求項1のオープンビットラインDRAMデバイス。
- 半導体基板はシリコン・オン・インシュレーター基板を含む請求項1のオープンビットラインDRAMデバイス。
- ゲートはトレンチ内においてピラーの上面より低いところに形成されている請求項1のオープンビットラインDRAMデバイス。
- 垂直トランジスタが形成されたピラーの側部とは反対側のピラーの側部に第2の垂直トランジスタが設けられている請求項1のオープンビットラインDRAMデバイス。
- 埋め込みビットラインは第1の半導体コンタクト層に一体的に形成され、別の酸化物層により半導体基板から分離されている請求項1のオープンビットラインDRAMデバイス。
- オープンビットラインDRAMデバイスを形成する方法であって、
行列状にメモリセルのアレイを形成するステップを含み、
アレイの各メモリセルを形成するステップは、
半導体基板から外方に延び、第1の半導体コンタクト層と第2の半導体コンタクト層とが絶縁層により分離されたピラーを形成するステップと、
ピラーの側部に沿って垂直トランジスタを形成するステップとを含み、
垂直トランジスタ形成ステップは、
ピラー上にポリシリコン層を堆積させ、ポリシリコン層に方向性エッチングを施してピラーの側壁上だけにポリシリコン層の一部が残るようにし、
ポリシリコン層にアニーリングを施して、ポリシリコン層をエピタキシャル再成長させ、
第1及び第2の半導体コンタクト層からポリシリコン層内へドーパントを拡散させて、極薄垂直ボデイ領域により分離された第1及び第2の極薄垂直ソース/ドレイン領域を形成し、
極薄垂直ボデイ領域上にゲート絶縁層を形成し、
ゲート絶縁層上にゲートを形成するステップを含み、
アレイの各メモリセルを形成するステップは、さらに
第2の半導体コンタクト層と結合するキャパシタを形成するステップを含み、
DRAMデバイス形成方法は、さらに、
メモリセルアレイの各行の隣接するピラーの第1のコンタクト層を相互接続するためにピラーの下方に半導体材料の複数の埋め込みビットラインを形成するステップと、
ピラーの列間のトレンチに隣接する垂直トランジスタの極薄垂直ボデイ領域にアドレスするために各々がトレンチ内を複数の埋め込みビットラインに対して直角に延びる複数のワードラインを形成するステップとを含む、オープンビットラインDRAMデバイスの形成方法。 - 半導体基板から外方に延びるピラーを形成するステップは、シリコン・オン・インシュレーター基板から外方に延びるピラーを形成するステップを含む請求項8の方法。
- 垂直トランジスタが形成されたピラーの側部とは反対側のピラーの側部に沿って第2の垂直トランジスタを形成するステップをさらに含む請求項8の方法。
- トレンチの両側の隣接するピラー上に一対の垂直トランジスタが形成される請求項10の方法。
- トレンチに2つの別個のワードラインを形成するステップをさらに含む請求項11の方法。
- ワードラインはトレンチ内においてピラーの上面より低いところに形成される請求項12の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/780,125 US6531727B2 (en) | 2001-02-09 | 2001-02-09 | Open bit line DRAM with ultra thin body transistors |
PCT/US2002/003426 WO2003015171A1 (en) | 2001-02-09 | 2002-02-06 | Open bit line dram with vertical ultra-thin body transistors |
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JP2004538642A JP2004538642A (ja) | 2004-12-24 |
JP2004538642A5 JP2004538642A5 (ja) | 2005-12-22 |
JP4399258B2 true JP4399258B2 (ja) | 2010-01-13 |
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US (3) | US6531727B2 (ja) |
EP (1) | EP1366524A4 (ja) |
JP (1) | JP4399258B2 (ja) |
KR (1) | KR100660489B1 (ja) |
CN (1) | CN1500292A (ja) |
WO (1) | WO2003015171A1 (ja) |
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US6383924B1 (en) * | 2000-12-13 | 2002-05-07 | Micron Technology, Inc. | Method of forming buried conductor patterns by surface transformation of empty spaces in solid state materials |
US6496034B2 (en) * | 2001-02-09 | 2002-12-17 | Micron Technology, Inc. | Programmable logic arrays with ultra thin body transistors |
US6566682B2 (en) * | 2001-02-09 | 2003-05-20 | Micron Technology, Inc. | Programmable memory address and decode circuits with ultra thin vertical body transistors |
US6531727B2 (en) * | 2001-02-09 | 2003-03-11 | Micron Technology, Inc. | Open bit line DRAM with ultra thin body transistors |
US6559491B2 (en) * | 2001-02-09 | 2003-05-06 | Micron Technology, Inc. | Folded bit line DRAM with ultra thin body transistors |
US7142577B2 (en) * | 2001-05-16 | 2006-11-28 | Micron Technology, Inc. | Method of forming mirrors by surface transformation of empty spaces in solid state materials and structures thereon |
US6898362B2 (en) * | 2002-01-17 | 2005-05-24 | Micron Technology Inc. | Three-dimensional photonic crystal waveguide structure and method |
US7132348B2 (en) * | 2002-03-25 | 2006-11-07 | Micron Technology, Inc. | Low k interconnect dielectric using surface transformation |
US7160577B2 (en) | 2002-05-02 | 2007-01-09 | Micron Technology, Inc. | Methods for atomic-layer deposition of aluminum oxides in integrated circuits |
DE10362018B4 (de) * | 2003-02-14 | 2007-03-08 | Infineon Technologies Ag | Anordnung und Verfahren zur Herstellung von vertikalen Transistorzellen und transistorgesteuerten Speicherzellen |
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-
2001
- 2001-02-09 US US09/780,125 patent/US6531727B2/en not_active Expired - Lifetime
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- 2002-02-06 JP JP2003519996A patent/JP4399258B2/ja not_active Expired - Lifetime
- 2002-02-06 KR KR1020037010469A patent/KR100660489B1/ko active IP Right Grant
- 2002-02-06 CN CNA028075498A patent/CN1500292A/zh active Pending
- 2002-02-06 EP EP02707710A patent/EP1366524A4/en not_active Withdrawn
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CN1500292A (zh) | 2004-05-26 |
EP1366524A4 (en) | 2008-10-01 |
KR100660489B1 (ko) | 2006-12-22 |
US7489002B2 (en) | 2009-02-10 |
WO2003015171A1 (en) | 2003-02-20 |
US6531727B2 (en) | 2003-03-11 |
EP1366524A1 (en) | 2003-12-03 |
US6890812B2 (en) | 2005-05-10 |
JP2004538642A (ja) | 2004-12-24 |
US20020109176A1 (en) | 2002-08-15 |
US20030218199A1 (en) | 2003-11-27 |
US20050145911A1 (en) | 2005-07-07 |
KR20030088432A (ko) | 2003-11-19 |
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