Electronics Forum | Mon Apr 23 09:37:20 EDT 2007 | davepick
Assuming you are going to build using a Leaded part on a Lead Free Process - beware of Weak Joints. I saw this at a large Multinational company - They had secondary reflow on a Top Side QFP when the PCB went over the wave. We did pull strength tests
Electronics Forum | Thu Oct 23 23:38:48 EDT 2008 | pathakvj
We have 8 layer HASL PCB. We saw molten solder blobs / balls on op side of assembled PCB. (to check, if this was a bare board problem), We passed bare board as received thru, SMT reflow oven and saw solder balls on top side of board. What could be th
Electronics Forum | Tue Aug 28 08:28:30 EDT 2012 | rgduval
We agree with all of the previous comments, and would add the following: Warpage is generally caused by excess moisture in the raw boards. Have you tried baking the boards prior to assembly? We had this issue on a simple 4-layer board, and found t
Electronics Forum | Wed Jun 04 21:11:11 EDT 2014 | isd_jwendell
This style gave me grief as well. The problem is the way the part is manufactured leading to an unusual pad configuration. When the part is placed on the PCB there is no pad wrap under the part, the pad is 90 degrees to the board. The datasheet shows
Electronics Forum | Tue Feb 16 13:57:50 EST 1999 | Ron Beasley
| | I have a recent design (1 component side only) that calls for 2 surface mounted antenna's (brass plated) to be mounted on a PCB. The problem arises when the PCB is 18x11.25 and has 15 to 20 PCB's in the pallet (IE weight, fixturing to hold the a
Electronics Forum | Wed Dec 26 07:55:27 EST 2018 | mermarinc
Last month, I had worked with California based PCB manufacturer and it was a great experience. They offer a complete solution for contract manufacturing services from PCB Fabrication, PCB Assembly, Cable harnessing and more for quick-turn and standar
Electronics Forum | Thu Nov 02 20:14:20 EST 2000 | Edmund Molina
Hi! May I know what companies in Canada that are involved in Pcb assembly. Thank you.
Electronics Forum | Tue May 25 15:39:56 EDT 2021 | jamesatqkits
Hi Bukas, thanks for taking the time to respond. Drive is in good shape, everything seems OK. The first thing I did was make a copy of the drive. I should check all of the PCB's and make sure they are seated properly. The Samsung part of the assembl
Electronics Forum | Mon Aug 11 05:26:55 EDT 2008 | gersla
Hi All We are looking for not expensive solution for misprint PCB cleaning for both one and double side assemblies. We have tried different ways and cleaning solutions like: IPA, Vigon Zestron SD300, Vigon SC200 by deep the boards in to stainless ste
Electronics Forum | Wed Nov 22 21:13:41 EST 2017 | sy332366
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