Electronics Forum | Mon Aug 14 10:08:00 EDT 2006 | Paul@Boxborough
sant, When I worked in contract manufacturing, I used Air Vac or SRT systems which are rather large units. They are great for larger boards and BGA's. In my OEM life, I prefer smaller desk top units, which are more adapted to small boards with small
Electronics Forum | Tue Aug 01 22:04:11 EDT 2006 | davef
Problems with IPA are: * IPA / material being 'cleaned' combination still needs to be removed from the board. * IPA and empty containers are a hazardous material by RCRA criteria (40CFR 261) * Flash point (~12*C TCC) of IPA is low enough that all ele
Electronics Forum | Wed Nov 15 15:51:21 EST 2006 | RJ K.
I have been looking into buying a rework station like ERSA or PDR. What I am questioning is how well will these systems reflow BGA's with metal top/cover that are reflective. In addition, when preheating the board would dark body packages absorb te
Electronics Forum | Thu Aug 03 12:51:20 EDT 2006 | Ofer Cohen
I'd appreciate your support in the following issue: A significant batch of PCBs failed on de-lamination. The failure was identified, of course, only after the assembly. There is a big variety of components (BGA 1mm, BGA 0.8 mm, FQPs and other SMT co
Electronics Forum | Thu Aug 03 12:51:59 EDT 2006 | Ofer Cohen
I'd appreciate advise in the following issue: A significant batch of PCBs failed on de-lamination. The failure was identified, of course, only after the assembly. There is a big variety of components (BGA 1mm, BGA 0.8 mm, FQPs and other SMT componen
Electronics Forum | Fri Aug 04 16:11:59 EDT 2006 | chrisgriffin
Hell Doc, This is an easy one. But first I must disagree with the wave master. I have done extensive refurb. jobs on Soltec and Vectra. The only thing Soltec has on Vectra is a better solder pot, and even that is close. Vectra software is many, m
Electronics Forum | Fri Aug 04 13:47:20 EDT 2006 | pemea1
apples to apples. 20 boards 80 parts top and 10 parts bottom. these boards are done on a semi regular basis (you know the boards are coming to you from an OEM at least three times a month, just no exact schedule). All that is required is pasting..mo
Electronics Forum | Fri Aug 04 15:46:08 EDT 2006 | Chunks
Two reasons company B is asking $40 instead of $15-$20; 1. The set-up of their placement equipment takes time, thus the extra labor. Parts may be hard to get or what they norm keep in stock, plus storage of parts. 2. They know they can get awa
Electronics Forum | Wed Aug 09 08:06:07 EDT 2006 | davef
See "IPC-4554 Specification for Immersion Tin Plating for Printed Circuit Boards" 3.2.1 Immersion Tin Thickness. The most common reason for solderability issues with the white tin surface coating during multiple thermal excursions is a thin white ti
Electronics Forum | Wed Aug 09 19:14:15 EDT 2006 | Board House
Our Manufacturing policy regarding welds is as follows. 1) Inner layers - depends on Core thickness and line width. Our shop will not do any welding on core thickness less then 5 mils. or line width less then 5 mil. Good AOI practices reduce the a
.gif)
