Cascade Microtech Pyramid Probes - Manual (Page 2)

PN 153-691-2 www.cascademicrotech.comI Pyramid Probes: Used Core Inspection• 2
Step 2: Low Magnification Microscope Inspection
Inspection Area Criteria
Membrane
Are there any tears noted anywhere on the membrane?
A membrane tear is defined as a torn membrane caused by mishandling or equipment malfunction. Tears on a
new core that have been repaired by the factory are acceptable, as long as the repaired patch does not exceed
1000μm.
Tears resulting in signal damage to a critical trace cannot be repaired.
Cores with tears that do not include critical traces should be returned for repair to prevent propagation.
A torn trace can be waived by Engineering if it is not critical to the test program.
Has the membrane come off the alignment pin?
WARNING: Do not install in a box or board until repaired.
Contact local support for instructions.
Is there any damage to the membrane?
Escalate to a higher magnification inspection to determine if there is a failure.
Is the probe face clean of any debris?
Follow the procedure in Pyramid Probe Core Off-line Cleaning With Brush to clean the face after incoming
inspection is complete.
Plungers
Are there any cracks noted in the plunger beams from the tester side?
If cracks are noted, contact local support for instructions.
Are there any cracks in the plunger beams from the wafer side?
Skip this step if the core is installed in a PCB.
If cracks are noted, contact local support for instructions.
Tester Side
Wafer Side
Pyramid Probes: Used Core Inspection