Induction charging risk assessment

Charged board alike discharges to metal and human body

Lars Fast (Corresponding Author), Jaakko Paasi, Jeremy Smallwood, Ingvar Karlson

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Charge can easily be induced on electronics or on other conducting parts if they are exposed to external electrical fields. In production facilities where sensitive electronics are handled, strong electrostatic fields should be avoided due to the risk of causing electrostatic discharges (ESDs) that could damage components. In electronics manufacturing this is usually achieved by grounding all conductors and removing all insulators from an ESD Protected Area (EPA) in the facility. However, it is not always possible to remove all insulators from the EPA as they are sometimes an essential part of the production processes. In this case, a method of risk assessment is necessary to evaluate safe operation. We have studied induction charging of a dummy PWB (Printed Wiring Board) through a grounded MOSFET transistor, by grounding it directly to metal or through the human body, when the PWB is exposed to a static electric field. The experimental setup can easily be turned into an induction charging probe by changing the MOSFET transistor to a low leakage current, high voltage capacitor of suitable size and measuring the voltage over this capacitor.
Original languageEnglish
Pages (from-to)263-266
Number of pages4
JournalJournal of Electrostatics
Volume67
Issue number2-3
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed
Event11th International Conference on Electrostatics (Electrostatics 2009) - Valencia, Spain
Duration: 27 May 200929 May 2009

Fingerprint

risk assessment
human body
Static Electricity
Human Body
Risk assessment
charging
induction
Electrostatic discharge
Electronic equipment
wiring
Metals
Electric grounding
Printed circuit boards
capacitors
Transistors
Capacitors
transistors
field effect transistors
Electric fields
electronics

Keywords

  • Risk assessment
  • Electrostatic discharge
  • ESD sensitive devices

Cite this

Fast, Lars ; Paasi, Jaakko ; Smallwood, Jeremy ; Karlson, Ingvar. / Induction charging risk assessment : Charged board alike discharges to metal and human body. In: Journal of Electrostatics. 2009 ; Vol. 67, No. 2-3. pp. 263-266.
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title = "Induction charging risk assessment: Charged board alike discharges to metal and human body",
abstract = "Charge can easily be induced on electronics or on other conducting parts if they are exposed to external electrical fields. In production facilities where sensitive electronics are handled, strong electrostatic fields should be avoided due to the risk of causing electrostatic discharges (ESDs) that could damage components. In electronics manufacturing this is usually achieved by grounding all conductors and removing all insulators from an ESD Protected Area (EPA) in the facility. However, it is not always possible to remove all insulators from the EPA as they are sometimes an essential part of the production processes. In this case, a method of risk assessment is necessary to evaluate safe operation. We have studied induction charging of a dummy PWB (Printed Wiring Board) through a grounded MOSFET transistor, by grounding it directly to metal or through the human body, when the PWB is exposed to a static electric field. The experimental setup can easily be turned into an induction charging probe by changing the MOSFET transistor to a low leakage current, high voltage capacitor of suitable size and measuring the voltage over this capacitor.",
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Induction charging risk assessment : Charged board alike discharges to metal and human body. / Fast, Lars (Corresponding Author); Paasi, Jaakko; Smallwood, Jeremy; Karlson, Ingvar.

In: Journal of Electrostatics, Vol. 67, No. 2-3, 2009, p. 263-266.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Induction charging risk assessment

T2 - Charged board alike discharges to metal and human body

AU - Fast, Lars

AU - Paasi, Jaakko

AU - Smallwood, Jeremy

AU - Karlson, Ingvar

PY - 2009

Y1 - 2009

N2 - Charge can easily be induced on electronics or on other conducting parts if they are exposed to external electrical fields. In production facilities where sensitive electronics are handled, strong electrostatic fields should be avoided due to the risk of causing electrostatic discharges (ESDs) that could damage components. In electronics manufacturing this is usually achieved by grounding all conductors and removing all insulators from an ESD Protected Area (EPA) in the facility. However, it is not always possible to remove all insulators from the EPA as they are sometimes an essential part of the production processes. In this case, a method of risk assessment is necessary to evaluate safe operation. We have studied induction charging of a dummy PWB (Printed Wiring Board) through a grounded MOSFET transistor, by grounding it directly to metal or through the human body, when the PWB is exposed to a static electric field. The experimental setup can easily be turned into an induction charging probe by changing the MOSFET transistor to a low leakage current, high voltage capacitor of suitable size and measuring the voltage over this capacitor.

AB - Charge can easily be induced on electronics or on other conducting parts if they are exposed to external electrical fields. In production facilities where sensitive electronics are handled, strong electrostatic fields should be avoided due to the risk of causing electrostatic discharges (ESDs) that could damage components. In electronics manufacturing this is usually achieved by grounding all conductors and removing all insulators from an ESD Protected Area (EPA) in the facility. However, it is not always possible to remove all insulators from the EPA as they are sometimes an essential part of the production processes. In this case, a method of risk assessment is necessary to evaluate safe operation. We have studied induction charging of a dummy PWB (Printed Wiring Board) through a grounded MOSFET transistor, by grounding it directly to metal or through the human body, when the PWB is exposed to a static electric field. The experimental setup can easily be turned into an induction charging probe by changing the MOSFET transistor to a low leakage current, high voltage capacitor of suitable size and measuring the voltage over this capacitor.

KW - Risk assessment

KW - Electrostatic discharge

KW - ESD sensitive devices

U2 - 10.1016/j.elstat.2009.01.024

DO - 10.1016/j.elstat.2009.01.024

M3 - Article

VL - 67

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EP - 266

JO - Journal of Electrostatics

JF - Journal of Electrostatics

SN - 0304-3886

IS - 2-3

ER -