Made for High Resolution Stub Defect Detection

Made for High Resolution Stub Defect Detection

The process of backdrilling excessive stubs in printed wiring board vias is essential for ensuring signal integrity and mitigating attenuation as high frequency signals pass from layer to layer. Up till now however, a misaligned or partially completed backdrill process have proven difficult to detect.  Now, Introbotix introduces STUBView, a high resolution stub measurement, and stub detection system than can help ensure your mission critical wiring boards are performing just as they were designed.

Fast to setup and calibrate… and even easier to use.

STUBView is made for production environments, and with it comes a easy-to-use interface and setup process. Run the system and product calibration, dial in the stub length tolerance, identify your trace points and then you’re ready to begin testing. STUBView then proceeds with measuring via stubs at each via and reports a pass or fail based on maximum stub length tolerance. Simple to operate and easy to read results allow an operator with minimal training to detect an excessive stub length, or defect that could prevent a wiring board from performing as it should.

Scalable from a Low-Volume Station to 100% Robotic Testing.

Depending on your needs STUBView can be equipped with a probing station for low-volume work. But for mission critical 100% testing, STUBView also works as a robotically controlled high speed system capable of performing thousands of via stub testing in one operation.

 

Built on a proven High Frequency TDR platform

STUBView utilizes high frequency electrical measurements to determine the stub length present in up to 100% of all PCB vias. This is done by generating 50GHz step pulses utilizing TDR instrumentation. These test signals are inserted into the DUT at the via location with either single-ended or differential odd mode stimulus. The resultant waveforms from the DUT injection are collected and then processed through a fast fourier transform (FFT) algorithm to generate the frequency domain response. The results produce a characteristic loss vs. frequency (dB/freq) profile for each via from which a stub length is determined and evaluated to ensure that it is less than the maximum accepted length (mils).

Scalable from a Low-Volume Station to 100% Robotic Testing.