Agilent Technologies 1168/9A, User Manual

Page: 93 / 252

Using Probe Heads 2
Using N2884A Fine-Wire ZIF tips
1168/9A Probes User’s Guide 93
to wiggle the longer wire slightly. If the wire wiggles, but
stays stuck in place on the IC then it was properly placed in
the well.
Figure 60 Longer Wire Landed
With the longer wire in place, move the micropositioner in
the x- y direction until the shorter wire is over the target
well. Then adjust the positioner in the z- direction to land
the shorter wire into its well.
Figure 61 Shorter Wire Landed
The Fine Wire ZIF tip should now be ready to make a
differential measurement. Before turning on your DUT, you
need to ensure that the two wires are not touching. You
should be able to confirm in the microscope that the tips
are not overlapping, but these wires do buckle when you
land them so they could be touching further up the wires.
Decrease the magnification of the microscope until you can
see the entire length of both wires and ensure that the wires
are not touching.
Land the longer of the
two wires in its
well
Land the shorter of
wires into its well