Electronics Forum: flex cicruit reflow (Page 6 of 12)

allflex flexible printed circuit SMT placement

Electronics Forum | Fri Jul 02 09:27:36 EDT 2010 | remullis

I am new to flex circuit manufacturing, placing SMT. We have a need to use this technology, but I have no experience in the process. The sample our design engineers have obtained are from a company called Allflex. How does this process work? printi

Sir's can anyone help me..need advise

Electronics Forum | Fri Oct 07 17:22:16 EDT 2011 | davef

Questions are: * Pressure? * Heating ramp? * Solder alloy? * Solder preform or paste reflow? [We have more, depending on your answer] * 0.5 mm is pretty tight. Talk about tooling holes and measures to prevent flexing of the assembly * In time, heat a

question about reflow- it it ever a long term solution?

Electronics Forum | Wed Jul 04 12:18:14 EDT 2012 | davef

Phil is correct in his description of proper rework technique. Possible explanations of the reason for popping of your BGA are: * Thermal cycling of components cause them to flex on a different point in the cycle that the board possibly resulting in

Temperature Profile for 0.2mm Thick ENIG Flex PCB

Electronics Forum | Fri Jan 31 10:04:14 EST 2020 | emeto

Jinesh, My initial suggestion is you have too much solder past. Please try to reflow a few of these parts without solder paste. Colse aperture, put some tacky flux on this part location and give it a try. I bet you will not see any voiding.

Teflon PCBs

Electronics Forum | Tue Oct 16 17:38:42 EDT 2001 | lileubie

Depending on the type of teflon material, thickness, and reflow profile requirements, these will have a direct bearing on your maximum process allowable PCB pallet size. You'll want to be careful on how big the PCB or pallet is. Larger teflon PCBs

Flex board pallet

Electronics Forum | Thu Jul 27 12:30:37 EDT 2006 | Rob

Hi David, we used the following techniques in high volume production, depending on the type of flexi-board: (all were in milled pockets in a durastone pallet) 1) Kapton tape top & bottom 2) Spray mount & samll amount of kapton tape (you only had

oven resin from adhesives

Electronics Forum | Tue Aug 13 20:57:01 EDT 2002 | davef

We don�t use this glue. What does Heraeus say about your condensate? [I'm With the previous poster. Your condensate sounds like goop from NC flux not glue.] How to clean out a 3 meter length of chimney? Depends on your tolerance for pain * Take

Re: Reflow soldering a Flexi-Rigid pcb

Electronics Forum | Sun Apr 05 09:46:47 EDT 1998 | Earl Moon

We are looking at reflow soldering some Flexi-rigid pcbs. I have heard that IR reflow soldering can make the Polyimide "self heat" and cause de-lamination. Does anyone have any info. The thermal problems associated with polyimide rigid/flex de

Re: Baking of PCB's/Flexes

Electronics Forum | Thu Oct 26 13:56:08 EDT 2000 | ptvianc

Hello: Pre-baking laminates should only be performed:(1) to meet contractual agreements or (2) in response to an actual defect that can be traced to PWB water absortion. Besides the fact that a pre-bake is an enormous process "bottleneck," it also

Resonator Cracking

Electronics Forum | Fri Nov 16 03:23:15 EST 2007 | jwsmt

I'm requesting assistance in developing detection and containment methods for an issue with an SMD ceramic resonator (Murata CSTCE-G-A family). The returns have external visual cracks that originate at the termination and run at approximately a 45 d


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