K&S Gold Ball Wire Bonder

FOM Name:  PKG Gold Ball Wire Bonder
Instrument Make/Model:  K&S 4524
Instrument Contact:  Kurt Kupcho (kakupcho@wisc.edu, 608-262-2982)
Center:  NFC
Instrument Location:  Engineering Centers Building 3rd Floor Cleanroom

The K&S Model 4524 Ball Bonder is a thermo-sonic unit.  The bonding is done with the package and die on a heated stage.  The bonding head applies force and ultrasonic energy to apply the bond.  The 4524 operates in two modes for Z-direction movement of the bonding head, a semi-automatic or manual.  The unit has a 1-mil gold wire spool installed and is capable of a 152mm x 152mm bonding area.

This instrument has material restrictions.  Consult the allowed materials list for this instrument in FOM.

This is an accordion element with a series of buttons that open and close related content panels.


  • 25um gold wire
  • Heated work stage
  • Stereoscope for viewing bonding locations
  • Manual micro-manipulator operation
  • Semi-auto micro-manipulator operation
  • Gold on alumina practice boards


  • 152mm2 bonding area
  • 25um gold wire only