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“The cleanliness of a printed board can directly impact the effectiveness or quality of an assembled printed board,” said John Perry, IPC technical project manager. “Residues increase the risk of field failures or can electrically impede a printed board’s function, so having acceptance criteria for various levels of testing, as well as direction on how many samples should be tested, is extremely important.”
Referenced in the new cleanliness standard, IPC-TM-650 Method 18.104.22.168, Bare Printed Board Cleanliness by Ion Chromatography is the new test procedure that should be used in conjunction with IPC-5704 to measure the level of anionic and cationic residues on the surface of unpopulated (bare) printed boards by ion chromatography.
For more information, call (847) 597-2818, e-mail JohnPerry@ipc.org or visit www.ipc.org/ipc-5704.