Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


measuring board/assy cleanliness

mike weekes

#2707

measuring board/assy cleanliness | 18 October, 2000

Does anyone know of a less expensive technique to monitor board cleanliness (chlorides in micrograms/in2) other than omega mater - ion chromatography is costing us an arm and a leg.

reply »

#2708

Re: measuring board/assy cleanliness | 18 October, 2000

Mike: An omega meter has very little to do with ion chromatography. * IPC TM-650, 2.3.25B, Detection and Measurement of Ionizable Surface Contaminants is a process control method that washes boards with an isopropanol / water solution and measures the cleanliness of this solvent. Production line operators use an "omegameter," "ionograph," or similar equipment (Check the archives). Commonly called Resistivity of Solvent Extract (US) or Solvent Extract Conductivity (Europe). * IPC TM-650, 2.3.28, Ionic Analysis of Circuit Boards, Ion Chromatography Method is a materials analysis method that separates and quantifies anions and cations using liquid chromatography requiring a lab (http://www.wcaslab.com/tech/tblcic.htm), guys and gals in white coats, and a BIG check from you.

An additional point: J001 is very SIR oriented.

reply »

Reflow Ovens thermal process improvement

PCB Soldering Tools