Electronics Forum | Wed Jun 22 04:55:24 EDT 2011 | joseph_smile
give some hints to rduce smt pcb assembly cost .
Electronics Forum | Thu Oct 14 04:28:29 EDT 1999 | Grace Chua
Hi there, I have quite a number of problematic bd due to warpage problem. I would like to know the method on how to measure PCB warpage, thus to decide on the dispositon of these boards. Another question, can these warp bd be rework/fix. Is there
Electronics Forum | Tue Oct 07 03:55:03 EDT 2014 | puja
How to avoid /reduce warpage in long length PCB &
Electronics Forum | Wed Sep 02 11:41:29 EDT 2020 | pradeep14
How to reduce the PCBA warpage issue after Reflow oven for 1mm PCB Thickness
Electronics Forum | Tue Oct 07 22:15:12 EDT 2014 | padawanlinuxero
How to avoid /reduce warpage in long length PCB & > _1.6MM THICK PCB. You need to put it in a fixture or pallet to run it in the reflow oven, most common material use here is durostone for the pallets that we run in the reflow oven, we use Durosto
Electronics Forum | Thu Oct 14 18:25:29 EDT 1999 | JAX
Grace, You can get the information you need from IPC. Measuring board warpage is covered in theie 610B manual. It will let you know the what can be reworked and what cannot.
Electronics Forum | Tue Oct 07 08:44:49 EDT 2014 | emeto
Hi, 1. I will run the board on the mesh if single sided. 2. For double sided board, I will try stiffeners. 3. If stiffeners don't work, then you have to create a handling fixture(holds the board and has enough openings to let the air flow to the PC
Electronics Forum | Mon Sep 14 18:40:39 EDT 2020 | dwl
A reflow oven with Center rail support can help. If your volumes are too low to justify spending $$ on a proper carrier, titanium stiffeners applied to the PCB before it goes into reflow is a cheap, albeit manual solution.
Electronics Forum | Thu Oct 14 23:01:48 EDT 1999 | Dennis O'Donnell
With loaded boards, warpage can be removed by placing the assembly in a wave solder conveyor pallet as you would if you were going to wave solder the assembly. Place board and fixture in a Blue M forced air oven at 90 C for 30 minutes. Let cool to r
Electronics Forum | Fri Oct 15 11:05:50 EDT 1999 | Mark Phinney
Earliar we had problems with board warpage, Much of our problem was due to imbalances in the copper on oppisite layers in brief on a 8 layer board the copper on layer 1 should = the copper on layer 8, 2=7, 3=6, 4 = 5. We added copper to some layers t
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