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Negative EFO

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UTHE NEGATIVE EFO  

Uthe's proprietary material prolongs torch life as compared to standard materials used by the industry. Available for Shinkawa, K&S, Kaijo and ASM bonders.

bullet Reduces deterioration of bond capillary
bullet Automatic time control compensates for carbon build up on the torch
bullet Retrofittable for gold and copper applications
 

Negative EFO
Reduction of cratering, better grain formation, and longer capillary life are just some of the benefits attributed to Uthe's Negative EFO unit. With closed loop current feedback and voltage feedback versions available, Uthe's Negative EFO provide precise and consistent ball size control.

Negative EFO Torches
Used with ball bonders, the EFO torch acts as the cathode of a negative EFO system. Discharges ranging from 1500 to 6000 volts (depending on the EFO model). Carbon build up on the tool, increases the deterioration rate of the EFO torch which in turn lead to inconsistent ball formation.

EFO SUMMARY

Negative EFO

Constant Output

Max. Discharge
Voltage
Wire Size
(microns)
Output Current (mA) Recommended
EFO GAP (mm)
205 Current 1500-5000 (preset) 18-38 20 0.3-0.6
207 Current

2000-2800

20-50 50 0.2-0.7
207HV Current 2000-6000 20-50 50 0.2-2
228-1 Current

2500

18-38 20 0.3-0.5
238HV Current 2000-5000 (variable) 50-100 150(0.0-0.5)
200(5.0-10.0)
0.2-2

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Last modified: 2016-08-22