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Arsine Detection using Chemcassette ® Technology
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Honeywell.com 2 History In 1998 ACGIH proposed changing the TLV for AsH 3 from 50 ppb to 2 ppb In 2007 ACGIH changed the TLV for AsH 3 from 50 ppb to 5 ppb Honeywell Analytics has already developed a higher sensitivity and longer lasting Chemcassette ® Study data supported the ability for HA to meet the proposed lower TLV level for AsH 3
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Honeywell.com 3 Development The increased sensitivity of the new formulation allowed Honeywell Analytics to achieve better lower detectable limits for all equipment, as shown
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Honeywell.com 4 Gas Monitors’ Low Detection Limit Improvement AsH 3 PH 3 SiH 4 B2H6B2H6 MonitorXP Tape Standard Tape XP Tape Standard Tape XP Tape Standard Tape XP Tape Standard Tape Vertex/CM40.3 ppb5 ppb 0.25 ppb0.5 ppb10 ppb15 ppb System 160.7 ppb7 ppb8 ppb10 ppb0.4 ppb1.33 ppb13 ppb21 ppb SPM0.7 ppb15 ppb20 ppb30 ppb0.25 ppb0.5 ppb10 ppb30 ppb TLD0.7 ppb15 ppb20 ppb30 ppb0.25 ppb0.5 ppb10 ppb30 ppb
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Honeywell.com 5 Sensitivity Aging Results Honeywell Analytics also tested for Chemcassette ® sensitivity. Would the formula remain consistent over three months? Day 1Day 14 Day 42 Day 77 Day 122
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Honeywell.com 6 Gas Generation Methodology Apparatus A: gas source with 2 certified AsH3 gas cylinders Apparatus B: Kin-Tech gas generation with permeation device Concentrations determined by theoretical calculations, and confirmed by 3 standard methods
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Honeywell.com 7 Validation Methods Honeywell verified standard gas concentrations using 3 independent methods –FTIR (64 scans with a 10 m cell) –Analytical method (Visible spectrophotometry based on NIOSH method S332) –Kin-Tech Standard Gas Generator (Permeation Device Method)
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Honeywell.com 8 Gas Cylinder Consistency Test
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Honeywell.com 9 Signal to Noise Ratio To validate instrument response, Honeywell Analytics did extensive “noise level” studies both in the laboratory and in the field A new LDL (lower detection limit) was determined by finding an acceptable signal to noise ratio Ratio was set at >3:1 signal to noise
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Honeywell.com 10 CM4 ® Low Concentration AsH 3 Signal and Noise
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Honeywell.com 11 System16 Low Concentration AsH 3 Signal and Noise
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Honeywell.com 12 SPM Low Concentration AsH 3 Signal and Noise
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Honeywell.com 13 Ambient RH vs. Noise Test Normal RH setting in semiconductor fabs is about 40% Extensive studies were done on noise levels at 5% RH, at 40% RH and at 90% RH versus the signal generated by 0.5 ppb AsH 3 (one tenth of the proposed TLV level) Maximum noise drift caused by shifting RH from 5 to 40% is 10 cts. This is less than 1/10th the signal generated by 0.5 ppb of AsH 3
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Honeywell.com 14 CM4 ® Ambient RH Noise vs. 0.5 ppb AsH 3 Signal
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Honeywell.com 15 CM4 ® Monitor Accuracy Data CM4 ® Gas Monitor accuracy to low level concentrations was verified against the generated standards Verification results are shown at right Std Gas Conc (ppb) CM4 (ppb)Accuracy 0.450.496.98% 1.051.1104.62% 0.460.5108.39% 0.971.0105.13% 2.022.2108.51% 4.995.6111.41% 10.0510.6105.52% 20.0120.8103.94% 50.3049.598.40% 10.0110.7106.87% 24.8425.4102.26% 51.1049.997.66%
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Honeywell.com 16 CM4 ® Low Level Calibration Accuracy Verification I Standard Gas Source: Standard Gas Generator with Certified Gas Cylinder
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Honeywell.com 17 CM4 ® Low Level Calibration Accuracy Verification II Test 1Test 2Test 3Test 4Test 5Test 6Test 7Test 8 Oven Temperature (°C)30 50 60 Room RH (%)5048 5150525049 Gas RH (%)40 Total Output Flow* (ml/min)3273 Cylinder Pressure (psi)50 55 Permeation Oven Temperature (°C)30 50 60 Permeation Rate (nl/min)140.84 283.39 390.36 KT Gas Concentration (ppb)43.03 86.58 119.27 KT-Gas Flow (ml/min)230110802455609503273 Dilution Air Flow (L/min)10.05 10.07 7.616.24.5 Standard Gas Concentration (ppb)0.960.470.342.064.569.6220.0550.22 CM4 Response (ppb)0.980.50.322.35.210.121.552 CM4 Response/Standard Gas (ppb)102.08%107.32%94.16%11.84%114.00%104.98%107.25%103.55% Standard Gas Source: Standard Gas Generator with Permeation Device
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Honeywell.com 18 CM4 ® Low Level Calibration Accuracy Verification II Standard Gas Source: Standard Gas Generator with Permeation Device Std Gas Conc (ppb) CM4 (ppb)Accuracy 0.960.98102.08% 0.470.5107.32% 0.340.3294.16% 2.062.3111.84% 4.565.2114.00% 9.6210.1104.98% 20.0521.5107.25% 50.2252103.55%
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Honeywell.com 19 CM4 ® XP Result Consistency Over Time Before placing an XP CM4 ® at a Beta site, the CM4 ® was tested for consistency over time in laboratory condition
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Honeywell.com 20 Beta Testing Data Beta Customer ran sample lines from the test CM4 ® to existing monitoring locations at the tool, also in the fab utility area, and to VMBs located in the sub-fab The CM4 ® was run “in situ” for over three months Data was collected by the Customer and transmitted to Honeywell Analytics
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Honeywell.com 21 CM4 ® AsH 3 Low Detection Limit Feasibility Field Study Beta Testing Site A, Test Result I
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Honeywell.com 22 CM4 ® AsH 3 Low Detection Limit Feasibility Field Study Beta Testing Site A, Test Result II
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Honeywell.com 23 CM4 ® AsH 3 Low Detection Limit Feasibility Field Study Beta Testing Site A, Test Result III
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Honeywell.com 24 CM4 ® AsH 3 Low Detection Limit Feasibility Field Study Beta Testing Site A, Test Result IV
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Honeywell.com 25 CM4 ® AsH 3 Low Detection Limit Feasibility Field Study Beta Testing Site A, Test Result V
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Honeywell.com 26 Conclusion Based on Lab work, proof of methodology, and field trials, Chemcassette Technology can successfully monitor for AsH 3 at the newly established level of 5 ppb without risk of false positives.
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Honeywell.com 27 Questions??
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