Electronics Forum | Mon Jan 10 11:08:39 EST 2005 | mrgman9999
We are having a problem with popcorning of a plastic BGA that has been under careful humidity control. We have had problems in the past and some have been related to too much trapped internal solvents from the die attach epoxy. We did a life time b
Electronics Forum | Mon Jan 10 16:14:17 EST 2005 | fmonette
Hi Gary, With plastic BGAs it is more difficult to remove the trapped moisture because of ground planes in the substrate. If your parts have been sitting around for a long time they may be soaked with moisture and in some cases the 48 hours bake cy
Electronics Forum | Mon Jan 10 22:43:43 EST 2005 | davef
First, we know nothing about your assemblies or how storing them in an "unconditioned" warehouse will affect their performance or post-storage processing. Second, there are no specifications, because what might be good in one application might not b
Electronics Forum | Wed Jan 12 12:06:55 EST 2005 | Grant
Hi, The MYDATA is a very flexible machine, however it's slow as a chip shooter, and really needs Myspeed to work to get as much speed as possible. It's also wasteful to get chip placement speed because you need to repeat feeders of the same componen
Electronics Forum | Wed Jan 12 14:47:09 EST 2005 | gregp
This will always be the case with in-line spindle machines that rate their cph based on unreal conditions. Flexible placement machines with different head designs will perform better (closer to advertised) and are truley more flexible because you do
Electronics Forum | Thu Jan 13 10:09:45 EST 2005 | rlackey
Hi Fasst1, Have Assemblion/Philips actually building machines for 20 years, or were they badged machines? (I'm not asking to be funny, I'm asking as I don't know) I've build product on Topaz's, Emeralds & Comets, and they have been good machines, b
Electronics Forum | Thu Jan 13 23:31:19 EST 2005 | KEN
Many of the Engineers from Dynapert / Precima went to Philips EMT. You can see many simlarities in feeder and nozzle designs. They (Philips) have a signifficant history in the P&P arena. I have 3 GEM emeralds from 1998 that continue to calibrate at
Electronics Forum | Fri Jan 14 15:37:24 EST 2005 | gregp
Grant, By flex machine I simply mean a machine that can place the entire range of SMT components. I don't consider the majority of Japanese machines to be truly flex machines because they are always presented as two machine solutions. The first mac
Electronics Forum | Wed Jan 12 07:22:10 EST 2005 | cyber_wolf
We seem to have an accountability issue when it comes to operators building defective product. Currently we are putting a piece of masking tape with the assembly #, work order, and operator initials on our black trays at the end of the reflow oven. I
Electronics Forum | Wed Jan 12 21:37:04 EST 2005 | KEN
How thick is this pallet? 6mm, 8mm, 10mm? I would look at: Make sure you're pot height is correct (lead clearance). If you are burrying the pallet in the fountain, your going to "push" a large volume away. The solder "push" should not plow over t
