© 2015 desco industries inc. staticcontrol.com esd control experts s20.20-2014 changes and...
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© 2015 Desco Industries Inc. StaticControl.com
ESD Control Experts
S20.20-2014 Changes and Procedures
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ESD Association Standard ANSI/ESD S20.20-2014
For the Development of an Electrostatic Discharge Control Program for –
Protection of Electrical and Electronic Parts, Assemblies and Equipment (Excluding Electrically Initiated Explosive Devices)
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Agenda
• 1. Changes 2007 to 2014
• 2. Test Procedures
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CHANGES
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Transition period
• Companies certified
• 2015 transition period
• Companies previously certified to ESD S20.20-2007.
• New company certification ESD S20.02-2014
• All companies certified after 2016
• Using standard as guideline
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CDM events
• What is a CDM event?
• Value - 200 Volts Charge Device Model threshold
• Importance of understanding Device sensitivity
• Component sensitive to less than 200 V CDM?
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Isolated Conductors
• What is a isolated conductor
• Value – 35 volts
• Importance of measuring isolated conductors
• Voltage higher then 35 volts
• Solution − Ground or equipotentally bonded− Neutralize via ionization
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Flooring footwear system
• System defined as footwear, flooring & operator
• Operator voltage measurements for qualification only, both limits must be meet
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Ionization
• Use to be +/-50V
• Lower limit +/- 35V
• Decay time – User defined
• Test method ESD STM3.1
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Insulators
• Eliminate nonessential insulators – cups, personal items etc.
• Purpose – mitigate field-induced Voltage influencing CDM damage
• Insulators measured at 1 inch away at 2000V – 12 inches
• Insulators measured at 1 inch away at 125V – 1 inch
− Neutralize via ionization− Neutralize via other charge mitigation techniques
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Soldering
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Personnel Wrist Strap Jack Ground Connection
• Non-Monitored personnel ground point only
• Including common point ground (ground block) and Ground conductor to facility ground
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Test Procedures
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3.0 REFERENCED PUBLICATIONS • Unless otherwise specified, the following documents of the latest issue, revision or amendment form a part of this
standard to the extent specified herein:
• ESD ADV1.0, ESD Association’s Glossary of Terms(2)
• ANSI/ESD S1.1, Wrist Straps(2)
• ANSI/ESD STM2.1, Garments(2)
• ANSI/ESD STM3.1, Ionization(2)
• ANSI/ESD SP3.3, Periodic Verification of Air Ionizers(2)
• ANSI/ESD S4.1, Worksurfaces – Resistance Measurements(2)
• ANSI/ESD STM4.2, ESD Protective Worksurfaces – Charge Dissipation Characteristics(2)
• ANSI/ESD S6.1, Grounding(2)
• ANSI/ESD S7.1, Floor Materials – Characterization of Materials(2)
• ANSI/ESD STM9.1, Footwear – Resistive Characterization(2)
• ESD SP9.2, Footwear – Foot Grounders Resistive Characterization(2)
• ANSI/ESD STM12.1, Seating – Resistive Measurement(2)
• ANSI/ESD S13.1, Electrical Soldering/Desoldering Hand Tools(2)
• ESD TR53, Compliance Verification of ESD Protective Equipment and Materials(2)
• ANSI/ESD STM97.1, Floor Materials and Footwear – Resistance Measurement in Combination with a Person(2)
• ANSI/ESD STM97.2, Floor Materials and Footwear – Voltage Measurement in Combination with a Person(2)
• ANSI/ESD S541, Packaging Materials for ESD Sensitive Items(2)
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An ESD Protective Workstation connects all ESD worksurfaces, fixtures, handling equipment and personnel grounding devices to a Common Point Ground. The Common Point Ground is connected to the ESD Grounding/Bonding Reference Point, which in most cases will be the AC equipment ground. If an Auxiliary ground is used, it should be electrically bonded to the AC equipment ground.
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ANSI/ESD S1.1 Wrist Strap System Resistance Test
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ANSI/ESD STM2.1, Garments - Test Sleeve to Sleeve
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ANSI/ESD STM2.1, Garments - Test Point to Point
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ANSI/ESD STM2.1, Garments – Groundable Garment System
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ANSI/ESD STM3.1, Ionization – Bench Top side view
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ANSI/ESD STM3.1, Ionization – Overhead, side view
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ANSI/ESD STM3.1, Ionization – Air Gun, Side view
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ANSI/ESD S4.1, Worksurfaces –Resistance Measurements
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ANSI/ESD S6.1, Grounding
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ANSI/ESD S7.1, Floor Materials – Characterization of Materials
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ANSI/ESD STM9.1, Footwear – Resistive Characterization
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ESD SP9.2, Footwear – Foot Grounders Resistive Characterization
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ESD SP9.2, Footwear – Foot Grounders Resistive Characterization
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ANSI/ESD STM12.1, Seating – Resistive Measurement
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ANSI/ESD STM12.1, Seating – Resistive Measurement
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ANSI/ESD S13.1, Electrical Soldering/Desoldering Hand Tools
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ANSI/ESD S13.1, Electrical Soldering/Desoldering Hand Tools
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ANSI/ESD STM97.1 Floor Materials and Footwear – Resistance Measurement in Combination with a Person
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ANSI/ESD STM97.2, Floor Materials and Footwear – Voltage Measurement in Combination with a Person
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ANSI/ESD STM97.2, Floor Materials and Footwear – Voltage Measurement in Combination with a Person
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ESD TR53, Compliance Verification of ESD Protective Equipment and Materials
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Questions and Next Steps
Thank You!