Heated Stage for Thermosonic Wedge Bonding

Step 4 Adjustable standoffs

Being able to adjust the height of the work stage is critical. The wire bonder I'm using has no height adjustment and you get very little vertical movement. Additionally its better to work in middle of the range of the arm travel, rather than at its extremes.

So to achieve vertical adjustment I decided to use high temperature plastic rods held in place by tubing that has a slot on the side for using a set screw.

The 'tubing' was actually made by drilling out the center of 1/2 inch solid rod, and machine one side flat. This gives a very nice surface for a screw to tighten against. I have just over 1/2 inch of travel with this arrangement.