Electronics Forum | Fri Sep 16 13:19:59 EDT 2005 | vinod
Friends, I have a PCB with Immersion GOld (ENIG) finish. Here are the detalis on the PCB. 1. 6 Layers 2. Immersion Gold (ENIG)Nickel 125-250 Micro inch. 3. FR4 Material 4. Thickness 0.062". I am having problem soldering the through hole components.
Electronics Forum | Thu Nov 17 20:51:16 EST 2005 | cangly
Morning Mike, We use Pb63/Sn37, Alpha Metal alloy. Solder pot is at 250 C. The profile of board after Preheat about 100 C, Lambda Wave about 220C (use both Lambda and Chip wave), DWell time 2.1s ~ 3s. Conveyor speed 1.5 in/min. We run by bare board a
Electronics Forum | Tue Oct 31 09:43:06 EST 2006 | SWAG
Yes, this board is approx. 3" x 17" x .062"T with large areas of ground planes. However, the delam. does not seem to be confined to the plane. We also see it around component pads and fiducials. Generally speaking, it could be said that the first
Electronics Forum | Wed May 30 18:05:02 EDT 2007 | fredc
Chunks, Nozzle unfriendly? Maybe it should be called nozzle hostile. Depending on the machine and lighting a nozzle with a 1.8mm tube might work. In English units that would be a .072 OD with a .062 ID. The area such a nozzle would pick from is the 6
Electronics Forum | Thu Nov 08 12:05:05 EST 2007 | jdumont
Hole size may not have been an issue for you because your holes were already big enough? The alloy you are using has a lot to do with this I believe also. We are already at 5 seconds dwell for this which is mfg recommended for our solder. The caps we
Electronics Forum | Tue Mar 25 14:05:16 EDT 2008 | flipit
X7R >Z5U,Y5V. Y5Vs crack more than NPOs. Ceramic resonators crack often as well. I found that the chop style like the Fancord VPD5 is the lease stressful of the V-Score cutters. We have run as close as 0.025" to the edges with 0805s with no crack
Electronics Forum | Thu Jul 19 18:15:15 EDT 2012 | jil2000
We have a material that is been stick at cover tape, only 1 supplier is failing and only embossed tape packing is failing. A dark spots between tape and component are observed, we already bake material to se if is humidity, is not. We already apply
Electronics Forum | Thu Oct 31 02:43:55 EDT 2013 | hqew2013
The smallest finished hole available for 2 layer board is .020”. The smallest finished hole available for 4+ layer board is .014”. All holes are round and drilled through from top to bottom layer of board. No blind or buried vias. For holes = .15
Electronics Forum | Mon Jun 09 10:03:40 EDT 2014 | clydestrum
Well, typically we put rails on a lot of the boards due to the absence of fids and/or tooling holes. We do have a fixture that is somewhat universal that I could try to introduce into the next run. Unfortunately, the next run does not help my proble
Electronics Forum | Fri Nov 08 14:45:12 EST 2019 | charliedci
Appreciate the input from everyone. The PCB is .062" thick. As a CM we are at the mercy of our customer at this point although (hopefully) they are receptive to advice on the next build. Titanium strips could be an option, I also thought there might