Electronics Forum: ionic and 10ug (Page 1 of 2)

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.

Thanks chartrain and Doug

Electronics Forum | Thu Nov 04 19:51:28 EST 1999 | John

Thanks folks. The current vendor is doing an alcohol wash, top and bottom, then performing an ionic test on 100 boards. I'm not to confident in the testing because the readings for a "clean" board are 25 ugm/sq in and a "dirty" board are 40 ugm/sq in

Re: SERA and ROSA

Electronics Forum | Tue Nov 09 11:42:37 EST 1999 | Dave F

Jeff: Try this: ROSA. John�s spot on. I�ll add that it is a fluxless method that reduces the oxides in an aqueous solution. Another source of information is: Trench, M., Hillman, D., Lucey, G., "Environmentally Friendly Closed Loop Soldering,"

Re: Thanks chartrain and Doug

Electronics Forum | Fri Nov 05 09:52:44 EST 1999 | Dave F

John: Three things: 1 You are correctamundo!!!! What's the difference between slopping alcohol on dirty boards and washing dirty boards? Clean boards!!!! By the time those very nice people get done with their alcohol cleaning (a nip for the boar

Mixing conformal coating and RTV

Electronics Forum | Thu Apr 21 11:43:03 EDT 2005 | davef

We understand the problem of trying to coat over RTV. We have seen the same problem with acrylic and urethane coatings not wanting to stick to RTV. Some acrylics seem to be worse than urethane. Since this is a new product, may be you could pot your

Ionic testing and No-Clean flux

Electronics Forum | Fri Feb 04 09:23:21 EST 2000 | Casimir Budzinski

If No-Clean flux does not need to be cleaned, then why do I get readings of up to 27(ug NaCl/sq in) on boards that are not washed, up to 23.4(ug NaCl/sq in) on boards washed with DI water only and from 1.2 to 10.1(ug NaCl/sq in) on boards washed with

Re: Ionic testing and No-Clean flux

Electronics Forum | Sat Feb 05 09:08:18 EST 2000 | Dave F

Casimir: Let me expand on something that I said in my response to your thread on ionic testing. Generally, no-clean people don�t use ROSE testing as part of their process control, because the ROSE test is essentially washing your board in DI/IPA �

Re: Ionic testing and No-Clean flux

Electronics Forum | Sat Feb 05 09:11:05 EST 2000 | Dave F

Graham: Maybe a twist on your comments, I don't believe that people understand the true cost of using no-clean. Dave

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