Electronics Forum | Tue Apr 01 09:36:25 EST 2003 | davef
You're correct. There is no way you can aquous clean under a low stand-off part like a LGA. Your approach seems reasonable, given your constraints. [As long as your customer is paying, what the hey!!! Give 'em what they want.] Consider joining t
Electronics Forum | Mon Apr 07 12:29:15 EDT 2003 | davef
Are you talking safety or quality? * If it's quality that interests you, we know of no state that that has regulations on a quality procedure. * If it's safety that interests you, we know that Glenbrook Technologies has a page on the topic and expec
Electronics Forum | Tue Apr 08 11:52:34 EDT 2003 | Chrissie
I am currently trying to creat a model to calculate attrition on our SMT line. A new product is coming into our cleanroom and we have problems with the current product and atttrition levels. One of our main problems is a large batch for us (space ind
Electronics Forum | Mon Apr 14 12:40:28 EDT 2003 | jimcorr
They are letting you go on holiday with these problems outstanding??!! But seriously after reading about your problems I think that any further work is basically throwing good ��$$ after bad and reworking BGA almost always ensure that they will fail
Electronics Forum | Mon Apr 28 04:07:09 EDT 2003 | chrissieneale
The BGA rework process has been qualified for space flight. Which basically means someone sensible over in ESA has been replacing BGA's and life testing them. I agree the best way is to build clean boards without any mistakes, but i can honestly say
Electronics Forum | Thu Apr 10 10:05:30 EDT 2003 | stefwitt
I do assume the only machine capable of reporting rejected components is the placement machine. 2-3% is certainly way too much. Expect rejects ( out of visible tolerance ) in the permille range but not percent. If components are rejected with vacuum
Electronics Forum | Thu Apr 10 20:57:03 EDT 2003 | Ray Chartrand
I've also seen "as received" defective devices. A tier 1 EMS I was working with put down an entire shift worth of these devices before it was noticed. Their rework costs were $$$. Just goes to prove that there's no free ticket and when bean counters
Electronics Forum | Thu Apr 10 17:44:22 EDT 2003 | davef
Q1: Can they be masked so parylene doesn't get underneath? A1: Your parylene applyer may be able to mask area, but in general no. This stuff is cured in a vacuum chamber to make sure that it gets into every past corner. Q2: How do you remove and re
Electronics Forum | Fri Apr 11 16:11:32 EDT 2003 | stefwitt
The question new or used was discussed several times. If you start fresh and have no experience with one or the other machine vendor, I would get a new machine, whose supplier has a service tech in driving distance. If you select the used machine pa
Electronics Forum | Mon Apr 14 22:59:18 EDT 2003 | mantis
We Operate a procedure were by all potenial employes who are likely to be exposed to lead are screened for lead content in there blood prior to hiring,and once every year there after.There is no compensation given as this is mandatory but it is also
