Micro Short Measurements
What is a Micro Short?
A Micro Short is a higher resistance short across two conductors in a PCB. The short is typically a small piece of copper material, sometimes known as a copper sliver or whisker.
Why is it Important to find this type of defect in a PCB?
When higher voltage is applied to a PCB under certain condition the whisker could blow like a fuse. The chemical reaction to this burnt fuse has potential to cause Electro-chemical migration. Electro-chemical migration occurs in which metal ions move from one metal electrode to the other, causing precipitation of metal or compounds. Short-circuiting between electrodes can result as the dissolution and precipitation progress. The short circuit could cause the functionality of the PCB to be reduced.
Why Gardien’s Solution?
Gardien has implemented a simplified, and flexible solution into our G-Serries Flying Probe machines. Gardien designed the process for ease of use on our service floors, allowing accuracy and reduced training (virtually push-button technology).
Gardien has set five safe current ranges that could be used to detect the short
Current Limited To (µA)
Short Threshold (MOhms)