Electronics Forum | Mon Mar 07 20:27:07 EST 2005 | KEN
Oh silver and its...improved solderability over tin / copper. BS if you ask me. Look to your flux and thermal profile for wetting spread. Ask yourself just how much "wetting spread" do you need to fill a barrel? I have the same 100% barrel fill
Electronics Forum | Thu Mar 10 15:10:07 EST 2005 | bandjwet
In reviewing the myriad of BGA reliability tech papers there seems to be little commonality in the type of test protocols. There are tests that are industry specific, device vendor specific and customer specific. What guidance in terms of minimum me
Electronics Forum | Mon Mar 21 08:57:29 EST 2005 | davef
Se�or Tech Possibilities are: * The vent on the drain line is blocked. Generally when this happens, the blockage, like come critter building a nest in the pipe, is found on the roof. In this case, the smell would be constant. * Somewhere, the drai
Electronics Forum | Wed Apr 13 08:01:32 EDT 2005 | Bryan
Can you please decrease the ramp rate of your reflow profile?In my opion,if you heat the pin too fast,the solder will drop for the gravity and the cappilary force can't draw it back.On the row with much heatsink,this issue won't happen,that's the rea
Electronics Forum | Fri Apr 08 05:10:10 EDT 2005 | siverts
What is Your customers requirements? Is the PCBA mounted with front/back connectors? Will the PCBA be mounded in a rack and connected to opposite connectors on the other side? In this case, if the warpage is more than approx 1-1.5 % You will then n
Electronics Forum | Thu Apr 14 06:00:01 EDT 2005 | bryan
The shelf life of immersion silver is 6 to 12 months in good storage conditions. The finish is usually coated with a protective layer that inhibits oxidation (like with copper OSP). Care must be taken when handling the boards as the protective la
Electronics Forum | Wed May 11 08:41:46 EDT 2005 | Rob.
Cheers Jerry, forgot the most important one! Also want it to do: laser 3D volumetric solderpaste inspection Pre-reflow (including fault logging by placement machine & individual feeder) Post reflow solder joint inspection & handle lead free joints
Electronics Forum | Wed Jun 01 17:23:02 EDT 2005 | fastek
You're kidding yourselves if you think the Chinese don't build quality products. I just returned from a few trade shows in China and believe me they are building reflow ovens, wave solder machines, X-ray and AOI equipment that is plenty good quality
Electronics Forum | Thu Jun 09 06:15:17 EDT 2005 | Clampron
Joseph, We have all been using lead free components for some time. Many passive already have a Pb free plating and we have not seen catastophic failures on them. From the information I have seen, I think this should be OK (with the exception of BGA'
Electronics Forum | Sat Jul 09 11:31:14 EDT 2005 | techvet99
I have several circuit boards (about 14" by 16" in size) that I recently acquired and am trying to repair. One problem is that the former owner painted (spray paint I think) the word "TEST" in big red letters covering most of the solder side of the
