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Fowler Associates Labs

 

 

Static Fire Stories Articles & Technical Papers Current News

ESD Glove Tests

Conducted for Ansell Golden Needles
Test Methods: ESD Journal ATP # G1000 (Aug 1998)

 Electrical Resistance of Glove Material, Electrical Resistance - Body through Glove

 Triboelectric Generation of Glove Against Epoxy IC Package & Aluminum Plate

 Test Equipment: Extec MegOhm Meter, Monroe Isoprobe / Charge Plate Monitor

  Electrodes: 5 pound Steel

  Electrodes Applied voltages: 10 vdc, 100 vdc  

  Test conditions: 730F,   12% RH       &       730F,   50% RH

 

MicroKnit ESD Gloves

 knitted with X-Static Silver /Nylon Fibers

Test Conditions  

Resistance - Palm to Finger 

100 V

Thumb

Index

Middle

Ring

Small

@ 12 % RH

200 W

635 W

570 W

242 W

625 W

@ 50 % RH

131 W

155 W

200 W

285 W

350 W

 Test Conditions

Resistance - Wrist Strap to Palm and Fingers 

10 V

Palm

Thumb

Index

Middle

Ring

Small

@ 12 % RH

710 kW

1,100 kW

805 kW

920 kW

910 kW

930 kW

@ 50 % RH

200 kW

500 kW

550 kW

550 kW

570 kW

600 kW

 Test Conditions

Triboelectric Propensity

Charge on Epoxy BGA IC

Aluminum Charge Plate Voltage

@ 12 % RH

0.19 nano Coulombs

15 volts

@ 50 % RH

0.02 nano Coulombs

1 volt



The following tests were conducted on competitive style gloves

Gloves Tested:

Cut & Sewn Woven Fabric Gloves with Conductive Fibers

Test Conditions

Resistance - Palm to Finger 

100 V

Thumb

Index

Middle

Ring

Small

@ 12 % RH

> 1X1012 W

2.4 X106 W

3.0 X106 W

5.4 X106 W

> 1X1012 W

@ 50 % RH

9.0 X1011 W

1.0 X106 W

1.9 X106 W

1.3 X106 W

9.3 X1011 W

Note: the conductive fibers run from the wrist to the finger tips in parallel lines. Unless the electrode on the palm rests on the lines running to the finger being measured, there is no connection. The thumb and small finger have no conductive fiber runs to the main portion of the palm.

Test Conditions

Resistance - Wrist Strap to Palm and Fingers 

10 V

Palm

Thumb

Index

Middle

Ring

Small

@ 12 % RH

1,000 kW

2,500 kW

2,000 kW

2,200 kW

3,400 kW

4,500 kW

@ 50 % RH

720 kW

2,500 kW

2,800 kW

3,000 kW

3,100 kW

3,500 kW

Test Conditions

Triboelectric Propensity

Charge on Epoxy BGA IC

Aluminum Charge Plate Voltage

@ 12 % RH

0.92 nano Coulombs

20 volts

@ 50 % RH

0.03 nano Coulombs

3 volts

 


Gloves Tested:

Pink Polyethylene Gloves

 Test Conditions

Resistance - Palm to Finger 

100 V

Thumb

Index

Middle

Ring

Small

@ 12 % RH

3.3 X1010 W

2.5 X1010 W

1.9 X1010 W

3.5 X1010 W

2.9 X1010 W

@ 50 % RH

2.1 X1010 W

2.0 X1010 W

1.5 X1010 W

2.5 X1010 W

2.0 X1010 W

Test Conditions

Resistance - Wrist Strap to Palm and Fingers

10 V

Palm

Thumb

Index

Middle

Ring

Small

@ 12 % RH

6.4 X106 W

2.7 X107 W

2.5 X107 W

3.4 X107 W

2.8 X107 W

3.0 X107 W

@ 50 % RH

5.0 X106 W

1.8 X107 W

1.9 X107 W

1.8 X107 W

1.9 X107 W

2.0 X107 W

 Test Conditions

Triboelectric Propensity

Charge on Epoxy BGA IC

Aluminum Charge Plate Voltage

@ 12 % RH

3.83 nano Coulombs

3,100 volts

@ 50 % RH

2.57 nano Coulombs

260 volts




Gloves Tested:

Latex Surgical Gloves

 Test Conditions

Resistance - Palm to Finger

100 V

Thumb

Index

Middle

Ring

Small

@ 12 % RH

> 1X1012 W

> 1X1012 W

> 1X1012 W

> 1X1012 W

> 1X1012 W

@ 50 % RH

> 1X1012 W

> 1X1012 W

> 1X1012 W

> 1X1012 W

> 1X1012 W

 Test Conditions

Resistance - Wrist Strap to Palm and Fingers

10 V

Palm

Thumb

Index

Middle

Ring

Small

@ 12 % RH

> 1X1012 W

> 1X1012 W

> 1X1012 W

> 1X1012 W

> 1X1012 W

> 1X1012 W

@ 50 % RH

> 1X1012 W

> 1X1012 W

> 1X1012 W

> 1X1012 W

> 1X1012 W

> 1X1012 W

 

Test Conditions

Triboelectric Propensity

Charge on Epoxy BGA IC

Aluminum Charge Plate Voltage

@ 12 % RH

3.51 nano Coulombs

2,500 volts

@ 50 % RH

3.44 nano Coulombs

1,800 volts


Gloves Tested:

 Bare Hands

 Test Conditions

Resistance - Palm to Finger 

100 V

Thumb

Index

Middle

Ring

Small

@ 12 % RH

----

----

----

----

----

@ 50 % RH

----

----

----

----

----

 Test Conditions

Resistance - Wrist Strap to Palm and Fingers 

10 V

Palm

Thumb

Index

Middle

Ring

Small

@ 12 % RH

210 kW

245 kW

412 kW

532 kW

545 kW

600 kW

@ 50 % RH

200 kW

215 kW

459 kW

490 kW

500 kW

556 kW

Test Conditions

Triboelectric Propensity

Charge on Epoxy BGA IC

Aluminum Charge Plate Voltage

@ 12 % RH

0.09 nano Coulombs

2 volt

@ 50 % RH

0.03 nano Coulombs

1 volt

 

Tested by Fowler Associates,Inc.        September 3,1998

 

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