A small diameter Tungsten wire attached to a larger wire body
Scanning electron microscope photograph of a T-4-10 Tungsten point.
T-4 tips are for use in most standard commercial micropositioners for probing integrated circuits, pads, or lines. Each T-4 tip uses the same 10, 22, 35, 60, or 125 micron diameter tungsten wire as our Model 12C Picoprobe, but is mounted to a 0.020 inch diameter, 2 inch long tinned copper shaft.
An advantage of the 10 and 22 micron models pointed out by some of our users is that because the tungsten probing wire is thin and flexible it minimizes damage to the integrated circuit and allows them to probe the device for a much longer period of time. The flexibleT-4 tip remains in contact with the circuit even in the presence of probe table vibrations.
T-4 tips are not recommended for use on sensitive nodes where capacitance loading could be a problem. Instead, one of our high impedance Picoprobes should be used. If you would like T-4 samples, please contact our office.
| Part Number | Tungsten Probing Wire Shaft Diameter | Point Radius | Tip Length |
|---|---|---|---|
| T-4-5 | 5 micron | <0.1 micron | 0.13" (3.3mm) |
| T-4-10 | 10 micron | <0.1 micron | 0.13" (3.3mm) |
| T-4-22 | 22 micron | <1.0 micron | 0.20" (5.1mm) |
| T-4-35 | 35 micron | <2.0 microns | 0.20" (5.1mm) |
| T-4-60 | 60 micron | <3.0 microns | 0.20" (5.1mm) |
| T-4-125 | 125 micron | <5.0 microns | 0.20" (5.1mm) |
The T-4 Series utilizes various sizes of tungsten wire attached to a 0.020″ (0.51mm) diameter tinned copper shaft.
A large diameter solid Tungsten shaft precision tapered to a durable point
GGB Industries Inc. serves the on-wafer probing needs of the worldwide semiconductor industry, based in Naples Florida.
GGB Industries, Inc.
4196 Corporate Sq
Naples, FL 34104
Copyright © 2025 GGB Industries. All Rights Reserved.
Picoprobe® is a registered trademark of GGB Industries, Inc.
