JP7376959B2 - ガス供給量測定方法およびガス供給量制御方法 - Google Patents
ガス供給量測定方法およびガス供給量制御方法 Download PDFInfo
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- JP7376959B2 JP7376959B2 JP2022511891A JP2022511891A JP7376959B2 JP 7376959 B2 JP7376959 B2 JP 7376959B2 JP 2022511891 A JP2022511891 A JP 2022511891A JP 2022511891 A JP2022511891 A JP 2022511891A JP 7376959 B2 JP7376959 B2 JP 7376959B2
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- 238000000034 method Methods 0.000 title claims description 56
- 238000000691 measurement method Methods 0.000 title description 6
- 230000008016 vaporization Effects 0.000 claims description 53
- 238000009834 vaporization Methods 0.000 claims description 48
- 238000005259 measurement Methods 0.000 claims description 16
- 238000005070 sampling Methods 0.000 claims description 12
- LXEXBJXDGVGRAR-UHFFFAOYSA-N trichloro(trichlorosilyl)silane Chemical compound Cl[Si](Cl)(Cl)[Si](Cl)(Cl)Cl LXEXBJXDGVGRAR-UHFFFAOYSA-N 0.000 claims description 2
- 229910007245 Si2Cl6 Inorganic materials 0.000 claims 1
- 239000007789 gas Substances 0.000 description 136
- 239000007788 liquid Substances 0.000 description 23
- 239000002994 raw material Substances 0.000 description 16
- 230000001186 cumulative effect Effects 0.000 description 7
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 239000006200 vaporizer Substances 0.000 description 7
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000002524 organometallic group Chemical group 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 1
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
- G01F22/02—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for involving measurement of pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0694—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means or flow sources of very small size, e.g. microfluidics
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/005—Valves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/416—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control of velocity, acceleration or deceleration
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0623—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the set value given to the control element
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/41—Servomotor, servo controller till figures
- G05B2219/41108—Controlled parameter such as gas mass flow rate
Description
ΣQ(tn)・dt=ΣQi×(P0(tn)/P0i)・dt
Q=34500・Cv・P0/(Gg・T)1/2 ・・・(1)
Cv=A・α/17=πDL・α/17 ・・・(2)
ΣQ(tn)・dt
=ΣQi×(P0(tn)/P0i)・dt
=(Qi・dt/P0i)×(P0(t1)+P0(t2)+・・・+P0(tn)) ・・・(3)
4 気化供給装置
6 プロセスチャンバ
8 真空ポンプ
10 気化部
12 コントロール弁
14 供給圧力センサ
16 液体補充バルブ
18 ストップバルブ
20 予加熱部
Claims (7)
- 気化部と、前記気化部の下流側に設けられたコントロール弁と、前記気化部と前記コントロール弁との間の供給圧力を測定する供給圧力センサとを備えるガス供給系において行われるガス供給量測定方法であって、
前記コントロール弁を閉じた状態で前記供給圧力センサを用いて初期供給圧力を測定するステップと、
前記コントロール弁を所定時間だけ開くステップと、
前記コントロール弁を所定時間だけ開いているときに、前記初期供給圧力からの圧力降下が開始された時刻から前記所定時間が経過したあとの時刻までの間において、前記供給圧力を複数回測定するステップと、
複数の前記供給圧力の測定値に基づいて、前記コントロール弁を所定時間だけ開いたときのガス供給量を演算により求めるステップと
を含み、
前記ガス供給量を演算により求めるステップは、初期供給圧力P0iと、前記複数の供給圧力の測定値とに基づいて下記式によってガス供給量ΣQ(tn)・dtを求めるステップを含み、下記式において、Q(tn)は時刻tnにおける流量、dtはサンプリング周期、Qiは初期供給圧力P0iおよび前記コントロール弁のCv値に基づいて求められる初期流量、P0(tn)は、時刻tnにおける供給圧力である、
ΣQ(tn)・dt=ΣQi×(P0(tn)/P0i)・dt
ガス供給量測定方法。 - 前記ガス供給量を演算により求めるステップは、前記供給圧力の測定値に基づいて算出された流量を積算することによって前記ガス供給量を算出するステップを含む、請求項1に記載のガス供給量測定方法。
- 前記コントロール弁を所定時間だけ開くステップにおいて、前記コントロール弁は、最大設定流量に対応する最大開度に開かれる、請求項1または2に記載のガス供給量測定方法。
- 前記コントロール弁は、ピエゾバルブである、請求項1から3のいずれかに記載のガス供給量測定方法。
- 前記気化部において気化されるガスは、Si2Cl6である、請求項1から4のいずれかに記載のガス供給量測定方法。
- パルス流量制御信号に基づいて、コントロール弁を所定時間だけ1パルス分開くステップと、
請求項1から5のいずれかに記載の方法によって、1パルス分のガス供給量を測定するステップと、
測定されたガス供給量と予め設定された所望ガス供給量との比較結果に基づいてパルス流量制御信号を補正するステップと、
補正されたパルス流量制御信号に基づいて、コントロール弁を所定時間だけ1パルス分開くステップと
を含む、ガス供給量制御方法。 - 1パルス分のガス供給量を測定するステップは、複数回のパルスガス供給を行うプロセスにおける最初のパルスガス供給について行われ、その後パルスガス供給を行うときには、補正されたパルス流量制御信号が用いられる、請求項6に記載のガス供給量制御方法。
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PCT/JP2021/011117 WO2021200227A1 (ja) | 2020-03-30 | 2021-03-18 | ガス供給量測定方法およびガス供給量制御方法 |
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JP2019016096A (ja) | 2017-07-05 | 2019-01-31 | 株式会社堀場エステック | 流体制御装置、流体制御方法、及び、流体制御装置用プログラム |
WO2019021948A1 (ja) | 2017-07-25 | 2019-01-31 | 株式会社フジキン | 流体制御装置 |
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JPS601749B2 (ja) | 1977-06-17 | 1985-01-17 | ティーディーケイ株式会社 | マグネトロン発振装置 |
JP5082989B2 (ja) * | 2008-03-31 | 2012-11-28 | 日立金属株式会社 | 流量制御装置、その検定方法及び流量制御方法 |
CN104350443B (zh) | 2012-05-31 | 2018-02-16 | 株式会社富士金 | 带有降落方式流量监测器的流量控制装置 |
JP6230809B2 (ja) * | 2013-04-22 | 2017-11-15 | 株式会社日立国際電気 | 半導体装置の製造方法、基板処理装置およびプログラム |
US10866135B2 (en) * | 2018-03-26 | 2020-12-15 | Applied Materials, Inc. | Methods, systems, and apparatus for mass flow verification based on rate of pressure decay |
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JP2019016096A (ja) | 2017-07-05 | 2019-01-31 | 株式会社堀場エステック | 流体制御装置、流体制御方法、及び、流体制御装置用プログラム |
WO2019021948A1 (ja) | 2017-07-25 | 2019-01-31 | 株式会社フジキン | 流体制御装置 |
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JPWO2021200227A1 (ja) | 2021-10-07 |
KR20220104825A (ko) | 2022-07-26 |
TWI786577B (zh) | 2022-12-11 |
TW202146855A (zh) | 2021-12-16 |
US20230121563A1 (en) | 2023-04-20 |
WO2021200227A1 (ja) | 2021-10-07 |
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