Electronics Forum | Thu Jun 23 14:13:52 EDT 2005 | Frank
Luckily I haven't needed to do very many bottom side BGA placements. But I have also heard of trying to use a higher temp solder for bottom side only and your normal solder for the top side. This way the bottom side solder doesn't get hot enough to
Electronics Forum | Mon Jul 18 13:34:31 EDT 2005 | jzaccari
Francisco, You need to be concerned about "lead-free" BGAs. The SAC balls will not reflow at at standard tin-lead process temps. I have seen many examples where this has been a very big problem. In once case the BGAs just poped-off when the board was
Electronics Forum | Wed Jun 29 09:01:46 EDT 2005 | jdengler
Many of the components will deteriorate at very different rates. This makes giving an hour rating difficult. If you read, http://www.speedlinetech.com/docs/EquipmentImpactsofLeadFreeWavesolderingAPEX2003BestUSPaper.pdf you will see they give inspe
Electronics Forum | Fri Jul 08 18:41:50 EDT 2005 | GS
2 micromillimeters have been "eaten" reducing so the amount of copper thikness. I know they are going to test also HASL by using SACX307. It will be good to know if some one already made HASL tests by using SN100C (N-Superior) Many Thanks GS
Electronics Forum | Mon Jul 04 11:32:44 EDT 2005 | geb
One of my Universal GSM (1995/ 1996 model) pick and place machines has recently started to drop the nozzle on the reject belt when dropping off a rejected component. I have tried replacing the nozzel holders on the ends of the spindles but with no im
Electronics Forum | Thu Jul 14 10:29:53 EDT 2005 | stepheniii
It can be used as a sales tool. Choose a CPK you want, then "adjust" your definitions and limits untill you achieve that. Just be prepared to explain that someone who is unavailable for explainations set up the SPC system, and you are just following
Electronics Forum | Wed Aug 10 04:33:35 EDT 2005 | saiwong
First, butget. Second, flexibilities. If you have tight butget, you better choose used SMT equipment instead of the new one. It will save you hundreds of thousand dollar. Second, if you change model more frequently, you do not have many to choose. Fu
Electronics Forum | Wed Aug 10 18:14:48 EDT 2005 | rrylande
The boards I am referring to are definitely thick and large. But, on thinner smaller boards, is it OK to bring the board up to those higher temps because it takes less time? Many of the boards I am dealing with (large and small) are reaching 150-15
Electronics Forum | Thu Sep 01 12:55:39 EDT 2005 | bhu
I assume you mean Dr. Jenny Hwang--I attended her lead free seminar and found that most of her info is a good place to start. One of the debates about her work is whether bismuth should be used in any formulation. Many of the paste manufacturers di
Electronics Forum | Mon Aug 29 11:47:25 EDT 2005 | stalkerb
Do you have expierience of this type of Machine. approx how many product types are you running on your wave/ersa...? and approx batch sizes We have had a 5060 for about 1 year and it has been a revalation. your input is appreciatted as i am consi