Heavy metal contamination during integrated-circuit processing: Measurements of contamination level and internal gettering efficiency by surface photovoltage

1989 ◽  
Vol 4 (1-4) ◽  
pp. 113-121 ◽  
Author(s):  
L. Jastrzebski
Keyword(s):  
Heavy Metal ◽  
Integrated Circuit ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Surface Photovoltage ◽  
Contamination Level ◽  
Integrated Circuit Processing

Ultra-High Sensitivity Surface Photovoltage Measurement of Heavy Metal Contamination in Silicon Wafers with Fast Metal Identification

2018 ◽  
Vol 85 (6) ◽  
pp. 77-88
Author(s):  
Marshall Wilson ◽  
Alexandre Savtchouk ◽  
John D'Amico ◽  
Bret Schrayer ◽  
Dmitriy Marinskiy ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
High Sensitivity ◽  
Silicon Wafers ◽  
Surface Photovoltage

scholarly journals STANDARISASI NON SPESIFIK EKSTRAK ETANOL DAUN KECAPI (Sandoricum koetjape Merr.) DAN EKSTRAK ETANOL DAUN KELUWIH (Artocarpus communis)

2020 ◽  
Vol 16 (02) ◽  
pp. 105
Author(s):  
Maria Ulfah ◽  
Dhia Salsabilla ◽  
Evi Sukawati
Keyword(s):  
Heavy Metal ◽  
Water Content ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Ethanol Extract ◽  
Ash Content ◽  
Contamination Level ◽  
Test Results ◽  
Standard Parameter ◽  
Sandoricum Koetjape

ABSTRACT The chemicals contained in an extract must be maintained its quality. The aim of this study is to prove both that the ethanol extract of kecapi (Sandoricum koetjape, Merr.) and keluwih (Artocarpus communis) leaves meet the non-specific parameters on the standardization of the extract. The ethanol extract of kecapi and keluwih leaves were extracted using the ultrasonic method. The extract was tested with non-specific parameters including water content, total ash content and metal contamination level. The test results are compared with standard parameter references. Ethanol extract of kecapi leaf have water content of 27.75% ± 1.708, total ash content of 4.856% ± 0.040 and levels of As metal contamination < 0.030 mg/Kg, Hg < 0.002 mg/Kg, Pb < 0.400 mg/Kg, while ethanol extract of keluwih leaf have water content of 23.206 ± 0.091%, total ash content of 9,678 ± 0.306% and levels of heavy metal contamination of As < 0.03 mg/Kg, Hg < 0.006 mg/Kg, Pb < 0.02 mg/Kg. The both extract meet the standard parameters of water content, total ash content and levels heavy metal contamination. Key words: kecapi leaves (Sandoricum koetjape, Merr.), keluwih leaves (Artocarpus communis), non-specific standardization

Monitoring of Heavy Metal Contamination during Chemical Cleaning with Surface Photovoltage

2019 ◽  
Vol 140 (4) ◽  
pp. 1152-1159 ◽  
Author(s):  
L. Jastrzebski ◽  
O. Milic ◽  
M. Dexter ◽  
J. Lagowski ◽  
D. DeBusk ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Surface Photovoltage ◽  
Chemical Cleaning

Proteomics Study on Heavy Metal Contaminated Bellamya aeruginosas in Poyang Lake

2014 ◽  
Vol 522-524 ◽  
pp. 299-302
Author(s):  
Xiao Juan Zhu ◽  
Wei Chen ◽  
Jiang Hua Li
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Contamination ◽  
Dominant Species ◽  
Heavy Metal Contamination ◽  
Poyang Lake ◽  
Contamination Level ◽  
Lake Area ◽  
Proteomics Study ◽  
Contaminated Area

Heavy metal contamination to Poyang Lake is increasingly severe. Bellamya aeruginosas, the dominant species of bellamya in Poyang Lake, was chosen in this project to carry out a proteomics study, because they obtain nutrients from sediments directly and have a strong heavy metal enrichment capability. To get a better knowledge of the contamination level of Poyang Lake and a better understanding of toxicity and bioavailability of heavy metals contamination, the main heavy metals of surface sediments were tested and a proteomics study was carried out on bellamya aeruginosa, the dominant species of bellamya in Poyang Lake. Results of heavy metal tests show, to Poyang Lake, the most contaminated heavy metal is Cu, the widest contaminated heavy metal is Pb, the most contaminated area is the south lake area, and the least contaminated area is the entrance of Xioushui River. Proteomics analysis shows the main significantly different proteins are keratins or similar substances. These proteins are higher expressed in the samples obtained from the most contaminated area, so they could be the responding biomarkers for monitoring heavy metal contamination of surface sediment in Poyang Lake.

A Novel Method For Studying Degradation Related To Plasma Processing Of Silicon Wafers

1996 ◽  
Vol 428 ◽  
Author(s):  
J. Lagowski ◽  
A. Hofl ◽  
L. Jastrzebski ◽  
P. Edelman ◽  
T. Esry
Keyword(s):  
Heavy Metal ◽  
Radiation Damage ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Surface Photovoltage ◽  
Plasma Damage ◽  
Monitoring Tools ◽  
Novel Method ◽  
Dielectric Charge ◽  
New Generation

AbstractA new generation of monitoring tools based on oxide potential and surface photovoltage measurements offers real-time, non-contact diagnostics of plasma damage, especially dielectric charge build-up, radiation damage, and heavy metal contamination. The approach relies on reusable, 10 00Åoxide monitor wafers rather than test structures. The technique generates whole wafer maps powerful for correlating plasma damage with plasma equipment characteristics.

scholarly journals STANDARISASI NON SPESIFIK EKSTRAK ETANOL DAUN KECAPI (Sandoricum koetjape Merr.) DAN EKSTRAK ETANOL DAUN KELUWIH (Artocarpus communis)

2019 ◽  
Vol 16 (02) ◽  
pp. 20
Author(s):  
Maria Ulfah ◽  
Dhia Salsabilla ◽  
Evi Sukawati
Keyword(s):  
Heavy Metal ◽  
Water Content ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Ethanol Extract ◽  
Ash Content ◽  
Contamination Level ◽  
Test Results ◽  
Standard Parameter ◽  
Sandoricum Koetjape

ABSTRACT The chemicals contained in an extract must be maintained its quality. The aim of this study is to prove both that the ethanol extract of kecapi (Sandoricum koetjape, Merr.) and keluwih (Artocarpus communis) leaves meet the non-specific parameters on the standardization of the extract. The ethanol extract of kecapi and keluwih leaves were extracted using the ultrasonic method. The extract was tested with non-specific parameters including water content, total ash content and metal contamination level. The test results are compared with standard parameter references. Ethanol extract of kecapi leaf have water content of 27.75% ± 1.708, total ash content of 4.856% ± 0.040 and levels of As metal contamination < 0.030 mg/Kg, Hg < 0.002 mg/Kg, Pb < 0.400 mg/Kg, while ethanol extract of keluwih leaf have water content of 23.206 ± 0.091%, total ash content of 9,678 ± 0.306% and levels of heavy metal contamination of As < 0.03 mg/Kg, Hg < 0.006 mg/Kg, Pb < 0.02 mg/Kg. The both extract meet the standard parameters of water content, total ash content and levels heavy metal contamination. Key words: kecapi leaves (Sandoricum koetjape, Merr.), keluwih leaves (Artocarpus communis), non-specific standardization

scholarly journals The Amount of Selected Heavy Metals in Water, Sediments and Fish Species from the Rupsha River, Khulna, Bangladesh

2020 ◽  
pp. 1-9
Author(s):  
Md. Matiar Rahman ◽  
Md. Mahedi Hassan
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Fish Species ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Sediment Quality ◽  
Aquatic Organisms ◽  
Maximum Level ◽  
Contamination Level ◽  
Aquatic Life

The present study was conducted to figure out the heavy metals (Cd, Co, Cu, Fe, Hg, Mn, Mo, Ni, Pb and Zn) concentrations in water, sediments and fish species from the Rupsha River, Khulna, Bangladesh to spot the heavy metal contamination level. Heavy metals are dangerous because they're non-biodegradable and having an extended half-life period. The heavy metal contamination could also be an excellent concern, especially for aquatic life. The metal concentration within the water sample from the Rupsha River was significantly above the rule values of WHO and USEPA respectively. Moreover, the concentration of metal within the sediments was also greater than the respective probable effect concentrations of the sediment quality guidelines. Furthermore, consistent with the fish standards, these studied fish species weren't found to be contaminated by heavy metals. It’s concluded that each of the heavy metals from the whole sample didn't exceed the standard maximum level. This study demonstrated that water of Rupsha River isn't safe for aquatic organisms also like humans in terms of Pb, Cd and Cr contents as accumulated through consumption.

Contamination Monitoring Using Surface Photovoltage and Application to Process Line Control

1994 ◽  
Vol 354 ◽  
Author(s):  
Lubek Jastrzebski ◽  
Jacek Lagowski ◽  
Worth Henley ◽  
Piotr Edelman
Keyword(s):  
Heavy Metal ◽  
Silicon Wafer ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Surface Photovoltage ◽  
Strong Function ◽  
Processing Information ◽  
Process Line ◽  
P Type ◽  
Processing Steps

AbstractSurface photovoltage (SPV) measurements of lifetime and charge are used by the silicon industry for real-time, non-contact monitoring of alkalide and heavy metal contamination during IC processing. Information about contamination present at the surface or in the bulk of a silicon wafer is derived from their effects on measured electronic characterization. Identification and detection, with a sensitivity of ppq (107 cm'3), of Fe and Cr in the bulk of p-type silicon is possible via monitoring of their decomposition/pairing kinetics with boron. We will show the most important examples of the application of SPV to monitor critical IC processing steps. The allowable contamination thresholds in IC processing lines are a very strong function of technology and are different for various metals.

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