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When mounting a bare die to the sample holder (puck), make sure that the sample has a reflective backside.
If it is not reflective, the Ultracollimator will not be able to detect the reflected light. A quick hand polish
on a 3μm film will achieve the shiny surface needed. Mount sample directly above the center hole of the
sample holder. Ensure that nothing is covering the hole except the backside of the die, for example no wax,
tape, or any such things that would obscure the direct line of sight that the Ultracollimator has to the
backside of the sample. When using wax, make sure to surround the hole with wax so that once the sample
is placed on the holder, that no fluid can seep into the hole (when polishing, liquids can easily find their
way into the hole thus obscuring the line of sight of the ULTRACOLLIMATOR).
B.
Aligning Sample for Parallel Polishing with the Ultracollimator
1.
Once the system is calibrated and your sample mounted, mount the sample holder into the quick
release and lock into position.
2.
Lower the head by pulling the lock pin out.
Do not
allow the micro-positioning head to drop, guide the
head down slowly.
3.
Turn the rotating shaft that holds the sample so that the tilt knobs are facing West(to the left) and
East(to the right) This allows you to remember the orientation of your sample should you need to
correct for tilt.
4.
Observe the reflected dot on the monitor; it may not be in the center of the CALIBRATING crosshairs,
which tells you that the sample is not aligned properly to the lap.
5.
To align the sample to the lap, use the tilt knobs to bring the reflected dot on the monitor to the center
of the crosshairs.
6.
Once that is achieved, sample has been aligned and parallel polishing may commence.