JP2008311664A - 相変化メモリ装置及びその形成方法 - Google Patents
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Abstract
【解決手段】本発明の相変化メモリ装置の形成方法は、基板に相変化物質用前駆体及び窒素を含む反応性ラジカルを提供して相変化物質膜を形成するステップを有する。本発明によれば、低温で相変化物質膜を形成することができるので、相変化物質膜が均一に形成され、相変化物質膜を構成するグレーンの大きさが減少し得る。従って、狭い幅を有する相変化物質膜を形成することができる。
【選択図】図13
Description
〔反応式1〕
Ge(NR2)4+4NH3→ Ge(NH2)4+4NR2H
〔反応式2〕
Sb(NR2)4+4NH3→ Sb(NH2)4+4NR2H
20 第1絶縁膜
30 第1開口部
40 導電パターン
50、53 導電膜
50a 第1部分
50b、53b 第2部分
55 第1導電体
60 絶縁膜
65 第2絶縁膜
70 第2開口部
80、85 相変化物質膜
90 第2導電体
100 システム
110 制御機
120 入出力装置
130 メモリ
140 無線インタフェース
150 バス
Claims (20)
- 基板に相変化物質用前駆体及び窒素を含む反応性ラジカルを提供して相変化物質膜を形成するステップを有することを特徴とする相変化メモリ装置の形成方法。
- 前記反応性ラジカルは、化学式NRnH3―n又はN2RnH4−n(0≦n≦2、nは整数)を有し、前記Rは炭化水素基であることを特徴とする請求項1に記載の相変化メモリ装置の形成方法。
- 前記炭化水素基は、アルキル基(alkyl group)、アルケニル基(alkenyl group)、アルキニル基(alkynyl group)、アレン基(allenic group)又はこれらの結合からなるグループから選択されることを特徴とする請求項2に記載の相変化メモリ装置の形成方法。
- 前記アルキル基の炭素数は1以上10以下であり、前記アルケニル基の炭素数は2以上12以下であり、前記アルキニル基の炭素数は2以上13以下であることを特徴とする請求項3に記載の相変化メモリ装置の形成方法。
- 前記相変化物質用前駆体は、アミン基(amine group)を含むことを特徴とする請求項1に記載の相変化メモリ装置の形成方法。
- 前記相変化物質用前駆体は炭化水素基を含み、
前記炭化水素基は、アルキル基(alkyl group)、アルケニル基(alkenyl group)、アルキニル基(alkynyl group)、又はアレン基(allenic group)であり、
前記アルキル基の炭素数は1以上10以下であり、前記アルケニル基の炭素数は2以上12以下であり、前記アルキニル基の炭素数は2以上13以下であることを特徴とする請求項5に記載の相変化メモリ装置の形成方法。 - 前記相変化物質用前駆体は、ゲルマニウム前駆体、アンチモン前駆体、テルル前駆体を含み、
前記ゲルマニウム前駆体は化学式GeR1 x(NR2R3)4−x(0≦x≦3、xは整数)を有し、前記R1、R2、R3は水素又は炭化水素基であり、
前記アンチモン前駆体は化学式SbR1 y(NR2R3)3−y(0≦y≦2、yは整数)を有し、前記R1、R2、R3は水素又は炭化水素基であり、
前記テルル前駆体は化学式TeR1 z(NR2R3)2−z(0≦z≦2、zは整数)を有し、前記R1、R2、R3は水素又は炭化水素基であることを特徴とする請求項1に記載の相変化メモリ装置の形成方法。 - 前記炭化水素基は、アルキル基(alkyl group)、アルケニル基(alkenyl group)、アルキニル基(alkynyl group)、アレン基(allenic group)又はこれらの結合からなるグループから選択されることを特徴とする請求項7に記載の相変化メモリ装置の形成方法。
- 前記ゲルマニウム前駆体、前記アンチモン前駆体、及び前記テルル前駆体は周期的及び交番的に提供され、
前記反応性ラジカルは、前記ゲルマニウム前駆体、前記アンチモン前駆体、及び前記テルル前駆体のうちの何れか一つの前駆体が提供された後、他の前駆体が提供される前に提供されることを特徴とする請求項7に記載の相変化メモリ装置の形成方法。 - 前記ゲルマニウム前駆体及び前記アンチモン前駆体は周期的及び交番的に提供され、
前記テルル前駆体は、前記ゲルマニウム前駆体及び前記アンチモン前駆体と共に提供され、
前記反応性ラジカルは、前記ゲルマニウム前駆体及び前記アンチモン前駆体のうちの何れか一つの前駆体が提供された後、他の前駆体が提供される前に提供されることを特徴とする請求項7に記載の相変化メモリ装置の形成方法。 - 前記相変化物質膜は、150〜250℃の工程温度で形成されることを特徴とする請求項1に記載の相変化メモリ装置の形成方法。
- 前記相変化物質膜は、原子層蒸着工程(ALD)又は化学気相蒸着工程(CVD)を行うことによって形成されることを特徴とする請求項1に記載の相変化メモリ装置の形成方法。
- 基板上に第1開口部を有する第1絶縁膜を形成するステップと、
前記基板に相変化物質用前駆体及び窒素を含む反応性ラジカルを提供して、前記第1開口部内に相変化物質膜を形成するステップと、
前記相変化物質膜上に第2導電体を形成するステップと、を有することを特徴とする相変化メモリ装置の形成方法。 - 前記相変化物質膜を形成するステップは、
前記第1開口部の底及び側壁上に第1導電膜を形成するステップと、
前記第1開口部内の前記第1導電膜上に第2絶縁膜を形成するステップと、
前記第1開口部の側壁上に形成された第1導電膜の一部分を除去して第1導電体を形成し、前記第2絶縁膜と前記第1絶縁膜との間に第2開口部を形成するステップと、
前記第2開口部内に相変化物質を蒸着するステップと、を含むことを特徴とする請求項13に記載の相変化メモリ装置の形成方法。 - 前記第2開口部はリング形態を有することを特徴とする請求項14に記載の相変化メモリ装置の形成方法。
- 第1導電体を含む基板と、
前記第1導電体を露出する開口部を有する第1絶縁膜と、
前記開口部内に提供された相変化物質膜と、
前記相変化物質膜上に提供された第2導電体と、を有し、
前記相変化物質膜の幅は50nm以下であることを特徴とする相変化メモリ装置。 - 前記相変化物質膜を構成するグレーンは10nm以下であることを特徴とする請求項16に記載の相変化メモリ装置。
- 前記第1導電体は、前記開口部の底に提供された第1部分及び該第1部分から連続して前記開口部の側壁に沿って提供された第2部分を含み、
前記相変化物質膜は、前記第1導電体の前記第2部分に連結され、前記開口部の側壁に沿って提供されることを特徴とする請求項16に記載の相変化メモリ装置。 - 前記開口部内に提供された第2絶縁膜を更に有し、
前記第1絶縁膜と前記第2絶縁膜との間に前記第1導電体の第2部分及び前記相変化物質膜が位置することを特徴とする請求項18に記載の相変化メモリ装置。 - 前記相変化物質膜はリング形態を有することを特徴とする請求項19に記載の相変化メモリ装置。
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| JP2012082453A (ja) * | 2010-10-07 | 2012-04-26 | Nec Corp | 電極に接する絶縁膜の製造方法及びその絶縁膜を含む半導体装置 |
| JP2012212902A (ja) * | 2008-04-11 | 2012-11-01 | Sandisk 3D Llc | 側壁構造化スイッチャブル抵抗器セル |
| JP2013084959A (ja) * | 2011-10-12 | 2013-05-09 | Asm Internatl Nv | 酸化アンチモン膜の原子層堆積 |
| US8637843B2 (en) | 2011-02-21 | 2014-01-28 | Isamu Asano | Semiconductor device including phase change material and method of manufacturing same |
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Also Published As
| Publication number | Publication date |
|---|---|
| US7943502B2 (en) | 2011-05-17 |
| US20080308785A1 (en) | 2008-12-18 |
| US20110180774A1 (en) | 2011-07-28 |
| US8263963B2 (en) | 2012-09-11 |
| TW200908303A (en) | 2009-02-16 |
| KR100888617B1 (ko) | 2009-03-17 |
| KR20080110348A (ko) | 2008-12-18 |
| US20120319069A1 (en) | 2012-12-20 |
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