Electronics Forum | Fri Aug 11 22:14:59 EDT 2017 | dawson
Hi Adonys, What's ICP 1-3? Do you mean IPC? 1. Excess Plating- no excess, but filled with something which generated in the process of copper plating. 2. Dark Vias - it's oxidized. and the solder mask printing is not aligned. The board is failed. M
Electronics Forum | Wed Apr 19 04:41:42 EDT 2006 | ge_lim
Hi I am using selective soldering to dip soldering the connector pins to the PCB and would like to know your experience: a) Is there a recommended dip or dwell time for the dip soldering? b) How do we improve the solder coverage in the TH? c) How t
Electronics Forum | Thu Nov 15 13:46:28 EST 2001 | Terry Burnette
Underfilling PBGA's will increase the PCB level solder joint life by 4x-5x but we only recommend underfill for products going into extreme environments. Normally the 272ld and 388ld PBGA's solder joints when cycled at -40C to +125C should not see any
Electronics Forum | Thu Feb 06 13:57:01 EST 2003 | D. Brian Davis
I need some feedback on aqueous cleaners. We currently use a Unit Design batch cleaner. We will be looking to upgrade our board washing process and batch sizes in the near future. I am looking for user info. on the advantages/disadvantages to using b
Electronics Forum | Tue Nov 13 10:29:55 EST 2012 | 15009
I am looking for opinions on how much larger soldermask pads should be versus the copper. I am aware that some pcb manufacturers can hold tighter tolerances than others but is there an IPC recommendation? Some shops we deal with can hold .002 per sid
Electronics Forum | Wed Sep 01 05:07:55 EDT 1999 | David Winscott
I just recently entered the PCB industry and need some input from the Pros. I am looking for all-inclusive reference books...Are there any that you'd HIGHLY recommend? Thanks...
Electronics Forum | Thu May 13 17:11:48 EDT 2004 | Longhua
We are looking for PCB suppliers capable of building .5mm through hole boards. Internally, we require 5 mil traces, sometimes 4 mil. Our preferred material is Polyimide or BT Resin, and perhaps FR408. All help and/or recommendations is greatly appre
Electronics Forum | Wed Oct 06 11:06:04 EDT 2004 | JB
I am looking into a pcb washer/cleaner for misprints etc. If you are using one, which would you recommend? We use no clean solder and will use lead free in the future. Thanks
Electronics Forum | Mon Jan 08 10:41:50 EST 2007 | jaime39
If you bake the boards at 125 degrees celcius for about 4 hours it should work. I would also suggest that you talk to the PCB supplier to take care of this baking for you. NOTE: PCB�s with an Entek or any other type of OSP finish should not be baked.
Electronics Forum | Tue Jan 23 20:57:12 EST 2007 | asir
Can some of you kindly share some of your experiences with PbF PCB finish (OSP, ENIG, Immer Sn, Immer Ni,etc.) What are the benefit and disadvantage? Some of the issues that has been encountered. Which one you would recommend?
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