Electronics Forum: ionic (Page 1 of 42)

assembly cleanliness and ionic testing

Electronics Forum | Fri Feb 13 16:13:20 EST 2009 | jax

Many shops require levels for typical component packages on FR-4 or a like substrate to be 2, 9, 15, 1 and 10 mg/in2 for fluoride, chloride, bromide, nitrate, and sulfate respectively. These levels can change for Medical or Automotive.

assembly cleanliness and ionic testing

Electronics Forum | Sat Feb 14 08:21:13 EST 2009 | davef

We believe that it's perfectly resonable for you to define the cleanliness that you require. We recommend that you leave it at that and not define the process or materials that your supplier use in meeting that cleanliness level. Start with a dirty

assembly cleanliness and ionic testing

Electronics Forum | Thu Feb 12 11:57:59 EST 2009 | jmiller

i have searched the forum for hours. read all the threads that deals with cleanliness and ionic testing. (http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=40295) (http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=22603) (http://www.

ionic residues on the surface of printed circuit assemblies

Electronics Forum | Tue Sep 01 06:55:22 EDT 2009 | davef

Rocko: While you're rooting around with the cleaner to better understand the issues with your water supply, monitor the heaters of your cleaner. We've had instances were the heater control has created "white haze" problems. Are you sure the residue

ionic residues on the surface of printed circuit assemblies

Electronics Forum | Tue Sep 01 20:46:03 EDT 2009 | davef

No, put a thermocouple on the heater and monitor the temperature during cleaning.

Looking for ionic contamination test lab in Taiwan

Electronics Forum | Wed Feb 04 21:06:07 EST 2009 | shan

I'm looking for test labs in Taiwan that are capable of performing ionic contamination testing on small to medium sized SMT boards. I'm interested in both ion chromatography and ROSE test methodologies. Is anyone aware of any labs performing contami

ionic residues on the surface of printed circuit assemblies

Electronics Forum | Mon Aug 31 12:37:39 EDT 2009 | rocko

Hi All, As a result of equipment damage I have a problem with a cleanliness of printed circuit assemblies. One whole production batch was polluted by ionic residues because a large amount of hard water had been penetrated in the water-supply system

ionic residues on the surface of printed circuit assemblies

Electronics Forum | Tue Sep 01 11:25:19 EDT 2009 | rocko

Hi davef, Thanks for the suggestion. I have inspected the heaters but I think they are OK (no visible coating, deposits, etc.). Unfortunately, I'm not sure that the residues are ionic. It was just preliminary report of the person responsible for the

ionic residues on the surface of printed circuit assemblies

Electronics Forum | Mon Aug 31 18:18:45 EDT 2009 | smtdrkd

You may like to contact Mike Bixenman of Kyzen Corporation at 615-831-0888 or Ravi Parthasarathy of Zestron Corporation at 703-589-1198.

ionic residues on the surface of printed circuit assemblies

Electronics Forum | Wed Sep 02 11:54:34 EDT 2009 | davef

You can determine empirically what will work. * Use ion chromatography [IPC-TM-650 2.3.28] to evaluate the residues and determine if the residues must be removed. * Use energy dispersive spectroscopy for the elemental analysis or chemical characteriz

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