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Electrostatic Properties and Ions Elimination Effect of Polyvinyl Chloride (PVC) Adhesive Tape Manufacturing
(2020-03-01)
Jenbanphue, Tatsanee
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Hongesombut, Komsan
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Jitkajornwanich, Kulsawasd
;
Srisonphan, Siwapon
Electrostatic discharges (ESD) can release large amounts of energy to products and humans, causing product failure and pain, respectively. In this research, we elucidate the electrostatic charge generation, and discharge phenomena in real polyvinyl chloride (PVC) based electrical tape factory, which is primarily operated by the roll to roll manufacturing process. We perform the electrostatic potential measurement to identify the critical process of charge generation and to eliminate static charge at the source in order to prevent incidents caused by electrostatic discharge to operators or staff in the winding process. We also perform a numerical simulation-based finite element method (FEM) that provides modeling of an induced electric field, allowing the electrostatic discharge. The maximum potential is ~20 kV measured at 25 mm, indicating that the meter was induced by the electric field approximately ~0.8 MV/m, corresponding to surface charges density is ~ 10 μC/m<sup>2</sup>. Therefore, we introduced the ionization emitter bar in this case because it is feasible to install to the current infrastructure of the tested factory. The ionization emitter appears to reduce the electrostatic charge deposited on the PVC surface ~ 30% of the original charges. Therefore, installing a charge-dissipation technology at a proper location or combining with other methods, the electrostatic charge generation can be minimized even in roll to roll process.
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Fringe Field Assisted Electrostatic Discharge in Polypropylene Manufacturing
(2020-03-01)
Charoensorn, Panudda
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Srisonphan, Siwapon
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Kanokbannakorn, Weerawoot
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Kasemsuwan, Varakorn
Polypropylene (PP) is an electrical insulation material, and it can store electrostatic charge easily once they have friction with the metal or rubber rollers. Herein we present electrostatic issues in non-woven fabric manufacturing based on the roll to roll production processes. By using portable electrostatic-field meter measurements, we provide a low-cost and highly effective solution for discharging electrostatic charge before exposed or in contact with the operators, and we also identify where to install charge-dissipation technology to make it most useful. We employed the benefit of a highly and localized fringe field to discharge the electrostatic charge along the edge of the grounded metal rod placed at ~30 cm away. After placing the metal rod, the average of electrostatic potential of winding stock roll during spinning is decreased ~10 times, corresponding to ~0.2 μc/m<sup>3</sup> accumulated electrostatic charge on synthetic fabrics. The electric field distribution via the finite element method was illustrated corresponding to the reduction of electrostatic charge distribution in PP winding stock roll before and after inserting the grounded metal rod.
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Advanced material evaluations and considerations for electrostatic control in electronic device manufacturing
(2013-02-01)
Chakkaew, Anusorn
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Suriya-Amaranont, Chaba
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Titiroongruang, Wisut
Electrostatic potential and electrostatic discharge (ESD) has been a manufacturing issue for years, not only limited to semiconductor-based electronic devices, hard dish drive assemblies, but also to adjacent electronic device manufacturing such as microelectromechanical systems and nanoelectromechanical systems devices. This research presents a complete material testing and evaluations for electrostatic control in electronic device manufacturing. There are materials and system evaluations and considerations of electrostatic generation on personnel, personnel grounding through wrist strap and grounding wire, personnel grounding through constant wrist strap monitor, and with static control footwear and floorings. This research also presents machine grounding measurement and consideration with ground impedance, when ground noise is present, area where most regular ohm meter fails. Discharge simulation from device handling materials, and electrostatic discharge characterization of static control surfaces for small and light devices. © 2013 American Scientific Publishers All rights reserved.
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Electrostatic control and new device handling consideration for MEMS manufacturing process
(2012-01-01)
Chakkaew, Anusorn
;
Titiroongruang, Wisut
Electrostatic potential and electrostatic discharge (ESD) has been a factory issue for years, not only limited to semiconductor-based electronic devices, but there are evidences that new devices from emerging technologies become sensitive which are MEMS and NEMS. This paper describes new electrostatic control and device handling solutions for critical electrostatic control environment for MEMS manufacturing processes. There are experiments of personnel grounding devices, device handling materials, and evaluation of static control surfaces.
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Electrostatic discharge simulation and experimental analysis of electrostatic control in electronic device manufacturing
(2012-01-01)
Chakkaew, Anusorn
;
Titiroongruang, Wisut
Electrostatic potential and electrostatic discharge (ESD) have been a factory issue for years, not only limited to semiconductor-based electronic devices, hard dish drive assemblies, and microelectromechanical systems and nanoelectromechanical systems devices, which are extremely sensitive to electrostatic field and the ESD. This paper presents ESD simulation and experimental analysis of electrostatic control in electronic device manufacturing. There are experiments of electrostatic on personnel, personnel grounding through wrist strap, through constant wrist strap monitor, and with static control footwear and floorings, machine grounding consideration, device handling materials, and ESD characterisation of static control surfaces for small and light devices. Copyright © 2012 Inderscience Enterprises Ltd.
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Electrostatic control and the need of feedback control ionization in critical environment of MEMS manufacturing process
(2010-01-01)
Chakkaew, Anusorn
;
Titiroongruang, Wisut
This paper describes new electrostatic control countermeasures and solutions for critical electrostatic control environment for MEMS manufacturing processes, especially in MEMS's wafer handling that needs low electrostatic voltage. This includes personnel grounding methodology, ESD event measurement, and low ion imbalance ionization to support current and future needs of the MEMS. © (2010) Trans Tech Publications.
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Investigation of ESD prevention for deshunted GMR heads
(2005-01-01)
Siritaratiwat, Apirat
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Surakampoltorn, Wanlop
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Matsumoto, Mitsunori
The electrostatic discharge (ESD) effect in GMR heads in the deshunting process is studied in order to prevent the damage in this process. The simulation and experiment results are investigated and compared. It is found from these results that sequences of deshunting process, currently operating, can cause the damage of GMR heads due to the ESD effect, based on the charged device model, CDM. This also shows that the voltage across GMR head, as the tweezers is used, can be raised up to ∼3.7 V which is about harmful to damage the head. Examples of damage heads confirmed by the SEM are also shown. © 2005 The Institute of Electronics, Information and Communication Engineers.

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