JP2007043156A - 半導体技術における微細ピッチの製造方法 - Google Patents
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31144—Etching the insulating layers by chemical or physical means using masks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/033—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers
- H01L21/0334—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/0337—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by the process involved to create the mask, e.g. lift-off masks, sidewalls, or to modify the mask, e.g. pre-treatment, post-treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/033—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers
- H01L21/0334—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/0338—Process specially adapted to improve the resolution of the mask
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32139—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer using masks
Abstract
【解決手段】周期的構造を有するパターン層の細片様構造の側壁にスペーサ5が形成される。そして、該パターン層が除去され、該スペーサが、第2の側壁スペーサとなる別のスペーサ層7によって覆われる。上記スペーサとスペーサとの間は補充層8によって充填される。上記第1のスペーサ5と、第2のスペーサ7と、上記補充層の残留部分8とが周期的に連続している部分を残して、表面を平坦化する。横寸法は、1つ以上の残留層を除去することによってピッチの小さい周期パターンが形成されるように調節される。
【選択図】図5
Description
本発明は、半導体装置の周期的な構造またはパターンの製造方法に関する。
半導体メモリのような特定の種類の半導体装置では、少なくとも一次元において、構造素子もしくはパターン化された層が周期的に設けられている。例えばワード線およびビット線は、その多くが各々平行に延びた直線状に配されており、その線幅や、隣接している線と線との間の距離が装置全体において一定となっている。上記のような線の並びは周期的であって、その寸法は最小であることが好ましい。最小にすることによって、領域が最小のメモリセルアレイを実現することができる。線の寸法および、線と線との間の寸法は、周期的に並んだ方向に連続している。これら周期のうちの1つの長さは、パターンのピッチと呼ばれる。
〔特許文献1〕US6,063,688
〔特許文献2〕US5,296,410
〔特許文献3〕US6,410,387
一形態では、本発明は、従来よりも小さいピッチを有した半導体デバイスにおいて周期パターンを形成する方法に関する。
2 パターン層
3 ハードマスク
4 第1のスペーサ層
5 第1のスペーサ
6 第2のスペーサ層
7 第2のスペーサ
8 補充層
9 デバイス層
10 オリジナルピッチ
Claims (6)
- 半導体技術における微細ピッチの製造方法であって、
互いに等間隔、かつ平行に延びて配置される、同一構造の側壁および同一の横寸法を有する複数の細片様構造が形成されているパターン層を主面に有する基板を準備する工程と、
上記細片様構造及びパターン層の上に、第1のスペーサ層を塗布する工程と、
上記第1のスペーサ層を異方性エッチングして、上記細片様構造の側壁に第1のスペーサを形成する工程と、
主な側壁を2つ有する上記第1のスペーサを残すように、上記パターン層を除去する工程と、
上記パターン層を除去した後に、上記第1のスペーサを覆うように第2のスペーサ層を塗布する工程と、
上記第2のスペーサ層を異方性エッチングして、上記第1のスペーサの上記側壁に第2のスペーサを形成する工程であって、隣り合う2つの第1のスペーサにおける対向する側壁にそれぞれ設けられた該第2のスペーサ同士の間に空隙が残るように、第2のスペーサ層が異方性エッチングされる工程と、
上記空隙に補充層を充填する工程と、
上記補充層を充填した後に、上記第1のスペーサと、上記第2のスペーサと、上記補充層との上部表面を平坦にする工程と、
上記第1のスペーサと、上記第2のスペーサと、上記補充層と、上記第1のスペーサ及び第2のスペーサと、上記第1のスペーサ及び補充層と、第2のスペーサ及び補充層とからなる群から選択される少なくとも1つを除去する工程と、を含むことを特徴とする製造方法。 - 上記第2のスペーサ同士が等間隔に配置されるように、上記第1のスペーサと上記第2のスペーサとを形成することを特徴とする請求項1に記載の製造方法。
- 上記第1のスペーサと上記補充層とは、上記基板の主面に交互に配置しており、
第1のスペーサと上記補充層との間には、各々上記第2のスペーサが形成されていることを特徴とする請求項2に記載の製造方法。 - 上記パターン層の隣り合う2つの上記細片様構造の間に形成された第1のスペーサ同士の距離が、上記細片様構造の横寸法の2分の1未満となるように、上記パターン層の上記細片様部分、及び上記第1のスペーサを形成するとともに、
等間隔で、かつ上記パターン層の隣り合う2つの細片様部分の間に形成された第1のスペーサ同士の距離と等しい横寸法をもつように、上記第2のスペーサを形成することを特徴とする請求項1に記載の製造方法。 - 隣り合う2つの上記補充層の間には、3つの上記第2のスペーサが、第2のスペーサと第2のスペーサとの間に上記第1のスペーサを挟むようにして設けられていることを特徴とする請求項4に記載の製造方法。
- 第2のスペーサ及び補充層と、第1のスペーサ及び補充層と、第1のスペーサ及び第2のスペーサと、第2のスペーサと、第1のスペーサとからなる群から選択された少なくとも1つの層をマスクとして利用して、細片様構造の下部において別の層または別の連続層をエッチングすることを特徴とする請求項1から請求項5のいずれか一項に記載の製造方法。
Applications Claiming Priority (1)
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US11/194,489 US7291560B2 (en) | 2005-08-01 | 2005-08-01 | Method of production pitch fractionizations in semiconductor technology |
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JP2007043156A true JP2007043156A (ja) | 2007-02-15 |
JP4405484B2 JP4405484B2 (ja) | 2010-01-27 |
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US (1) | US7291560B2 (ja) |
JP (1) | JP4405484B2 (ja) |
CN (1) | CN100446216C (ja) |
GB (1) | GB2428882B (ja) |
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GB2428882B (en) | 2007-12-12 |
GB0613201D0 (en) | 2006-08-09 |
JP4405484B2 (ja) | 2010-01-27 |
CN1909205A (zh) | 2007-02-07 |
CN100446216C (zh) | 2008-12-24 |
GB2428882A (en) | 2007-02-07 |
US20070026684A1 (en) | 2007-02-01 |
US7291560B2 (en) | 2007-11-06 |
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