JP2022050045A - 処理装置及び処理方法 - Google Patents
処理装置及び処理方法 Download PDFInfo
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- 238000003672 processing method Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 288
- 239000011261 inert gas Substances 0.000 claims description 16
- 238000009826 distribution Methods 0.000 abstract description 28
- 241000894007 species Species 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 85
- 235000012431 wafers Nutrition 0.000 description 65
- 238000004458 analytical method Methods 0.000 description 32
- 238000010586 diagram Methods 0.000 description 14
- 230000007423 decrease Effects 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 11
- 238000004088 simulation Methods 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 238000010926 purge Methods 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 230000003028 elevating effect Effects 0.000 description 6
- 239000012495 reaction gas Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 238000000231 atomic layer deposition Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 239000011553 magnetic fluid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
Description
デバイスデザインが微細化・複雑化する中で、バッチ式の縦型熱処理装置による成膜処理において、ウエハ上の形成された表面積が大きいパターンに対して良好な面内均一性で膜を成膜することが求められている。縦型熱処理装置では、ウエハの周囲からウエハ中心に向けてガスを供給する。これにより、ウエハ端部で多くのガスが消費されるため、ウエハ端部に比べてウエハ中心にガスが行き渡りにくい。そのため、ウエハ中心の膜厚が、ウエハ端部の膜厚よりも薄くなりやすい。
図1及び図2を参照し、実施形態の処理装置の一例について説明する。図1は、実施形態の処理装置の一例を示す概略図である。図2は、ガスノズルの配置の一例を示す概略図である。
実施形態の処理方法の一例として、図1及び図2に示される処理装置1を用いて原子層堆積(ALD:Atomic Layer Deposition)法により、ウエハWにシリコン酸化膜を成膜する方法について説明する。
まず、図1及び図2に示されるようなバッチ式の縦型熱処理装置において、N2ガスノズルの位置及びN2ガスの流量(以下「N2流量」という。)を変更した場合における処理容器内の原料ガス濃度分布について、熱流体解析によるシミュレーションを実施した。シミュレーション条件は以下である。
N2ガスノズルの位置:30°、60°、120°、175°
ノズル1本あたりのN2流量:1000sccm、2000sccm、3000sccm
なお、N2ガスノズルの位置は、処理容器の長手方向からの平面視において、原料ガスノズルの位置を、処理容器の中心を基準とする中心角0°の始点とするときの角度で示す。
N2ガスノズルの位置:60°、90°、120°、130°、140°、150°、160°、170°、175°、180°
ノズル1本あたりのN2流量:1000sccm、2000sccm、3000sccm
図7は、N2ガスノズルの位置を説明するための図である。図7に示されるように、N2ガスノズルの位置Y1は、処理容器の長手方向からの平面視において、原料ガスノズルの位置Y2を、処理容器の中心を基準とする中心角0°の始点とするときの角度θで示す。
10 処理容器
31~37 ガスノズル
41、42 ガスノズル
41a、42a ガス孔
60 排気構造体
61 突出部
63 排気スリット
W ウエハ
Claims (11)
- 略円筒形状の処理容器と、
前記処理容器の側壁の内側に沿って該処理容器の長さ方向に延設する処理ガスノズルと、
前記処理ガスノズルに対向させて前記処理容器の反対側の側壁に形成された排気構造体と、
前記処理容器の中心に向けて濃度調整用ガスを吐出する濃度調整用ガスノズルと、
を備え、
前記長さ方向からの平面視において、前記濃度調整用ガスノズルは前記処理容器の中心を基準とする中心角で前記排気構造体が形成された角度範囲内に設けられている、
処理装置。 - 略円筒形状の処理容器と、
前記処理容器の側壁の内側に沿って該処理容器の長さ方向に延設する処理ガスノズルと、
前記処理ガスノズルに対向させて前記処理容器の反対側の側壁に形成された排気スリットと、
前記処理容器の中心に向けて濃度調整用ガスを吐出する濃度調整用ガスノズルと、
を備え、
前記長さ方向からの平面視において、前記処理ガスノズルの位置を、前記処理容器の中心を基準とする中心角0°の始点とするとき、前記濃度調整用ガスノズルは前記中心角が150°以上であり180°以下の範囲内に設けられている、
処理装置。 - 前記排気構造体は、
前記処理容器の側壁の一部を外側へ向けて突出させて形成された突出部と、
前記突出部の先端に形成された排気スリットと、
を含む、
請求項1に記載の処理装置。 - 前記濃度調整用ガスノズルは、前記排気スリットよりも前記処理容器の中心に近い位置に設けられている、
請求項3に記載の処理装置。 - 前記濃度調整用ガスノズルは、前記排気スリットよりも前記処理容器の中心から離れた位置に設けられている、
請求項3に記載の処理装置。 - 前記濃度調整用ガスノズルは、前記処理容器の内壁に沿って鉛直方向に延設する、
請求項1乃至5のいずれか一項に記載の処理装置。 - 前記濃度調整用ガスノズルは、前記処理容器の中心側に配向する複数のガス孔を有する、
請求項1乃至6のいずれか一項に記載の処理装置。 - 前記濃度調整用ガスノズルは、前記処理容器の中心と前記処理ガスノズルとを結ぶ直線に対して対称に配置された2本のガスノズルを含む、
請求項1乃至7のいずれか一項に記載の処理装置。 - 前記処理容器は、複数の基板を鉛直方向に間隔を有して略水平に収容する、
請求項1乃至8のいずれか一項に記載の処理装置。 - 前記濃度調整用ガスは、不活性ガスである、
請求項1乃至9のいずれか一項に記載の処理装置。 - 略円筒形状の処理容器内に基板を搬入する工程と、
前記処理容器の側壁の内側に沿って該処理容器の長さ方向に延設する処理ガスノズルから前記処理容器内に処理ガスを供給し、濃度調整用ガスノズルから前記処理容器の中心に向けて濃度調整用ガスを供給すると共に、前記処理ガスノズルに対向させて前記処理容器の反対側の側壁に形成された排気構造体から前記処理ガス及び前記濃度調整用ガスを排気する工程と、
を有し、
前記長さ方向からの平面視において、前記濃度調整用ガスノズルは前記処理容器の中心を基準とする中心角で前記排気構造体が形成された角度範囲内に設けられている、
処理方法。
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