Breakdown of SIR Standards
SIR Testing-Surface and Insulation Resistance testing, a form of standard testing where you measure the electrical reliability of a no-clean or a...
SIR
Enhanced SIR testing for Reliability
SIR testing has been around for a while. Why? And why might we want to use tests that are even more challenging than the current J-STD-004B?...
What Changed Between IPC J-STD-004A and J-STD-004B?
Comparing and contrasting these two standards....
Process & Materials Interaction Investigation
Brook Sandy-Smith, Technical Support Engineer for PCB Assembly Materials, and Phil Zarrow discuss the replacement of the ROSE (Resistivity of Solvents...
Effect of Reflow Environment on No-Clean Residue and Surface Insulation Resistance (SIR)
Eric Bastow, Assistant Technical Manager, America’s Region, shares results of tests he’s conducted on the effect of reflow environments on...
Surface Insulation Resistance (SIR) and Flux Designation (ROL) Defined
Eric Bastow and Phil Zarrow discuss surface insulation resistance (SIR)—the importance of non-conductive flux in no-clean commercial electronics...
Project 99 Wave Solder Flux Performance Proof: SIR Testing
Surface Insulation Resistance (SIR) tests measure the post soldering effect on the electrical integrity of the circuit boards. This post explores the ...
4B or not 4B?... The Difference in the IPC Test Requirements for "no-clean" L0 Type Soldering Fluxes
Overall we believe that while the J-STD-004B standard may not be perfect and subject to future further evolution, it does provide the best available m...
SIR and ECM Testing For Water-Wash Solder Paste Fluxes
It is not often that we get a request for SIR (Surface Insulation Resistance) and/or ECM (Electro-Chemical Migration) results for a water washable/sol...