flux residue

"flux residue" search results in the Electronics Forums



595 results found for "flux residue" in the Electronics Forums

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Testing effect of non-clean flux residue on solder joints

Mar 20, 2017 | Testing effect of non-clean flux residue on solder joints Testing effect of non-clean flux residue on solder joints We're currently using no-clean flux (SR-12) in a no-clean manual soldering process. The brownish flux residue impedes direct visual inspection of the solder joints. Therefore, we're forced to clean the residue off. (1) Is there testing we can do (environmental stress chambers) with which we can see the long-term effects of flux residue on solder joints? (2) Has anyone else seen this problem with no-clean flux residue and how do you handle it?

Flux Residues on Wave Soldered PCBAs

Jul 29, 2016 | Flux Residues on Wave Soldered PCBAs Flux Residues on Wave Soldered PCBAs We do have a commen problem with flux residues after the wave soldering process, even after using correct wave soldering profiles recommended by the flux supplier, The following flux type is being used Alpha EF 2210 VOC Fre Bellcore No Clean water Based .Can somebody give us some hints what could be the problem to have more flux residues on the PCBAs 1.Does this something to do with the solder mask DSR 2200 is commonly used on our PCBAs ? 2.Do you have any specific solder mask recommended for the following flux type we use ? 3.What could be the other

Flux residues found after assembly process (Clean process)

Jan 9, 2016 | Flux residues found after assembly process (Clean process) Flux residues found after assembly process (Clean process) Thanks for your input Michael. Basically the boards had been go through from washing and even ionic contamination already. In order to eliminate or detect the flux residues, is there any equipment something like a uv lamp that can detect the flux from the final visual inspection stage. I had found this equipment on the website (see below and photo attachment) and not sure if it's effective to detect the flux residue. Is anyone here used this equipment before and what is the outcome? www.uv-light.co.uk/inspection/solderflux/

Flux residues found after assembly process (Clean process)

Jan 8, 2016 | Flux residues found after assembly process (Clean process) Flux residues found after assembly process (Clean process) To all the experts, Is there any equipment (like coating uv lamp) that can detect flux residues on the pcba?

Cleaning old built up flux residues from reflow oven

May 1, 2014 | Cleaning old built up flux residues from reflow oven Cleaning old built up flux residues from reflow oven Of course now I am really wondering if my own guts like the Sprite/Solvent... 'hege

Cleaning old built up flux residues from reflow oven

Apr 15, 2014 | Cleaning old built up flux residues from reflow oven Cleaning old built up flux residues from reflow oven "the sprite sugar/water mix" becomes a solvent because the number of carbon molecules in the sugar chain is greater than number of carbon molecules in the flux residue chain. Er, something like that ...

Cleaning old built up flux residues from reflow oven

Apr 11, 2014 | Cleaning old built up flux residues from reflow oven Cleaning old built up flux residues from reflow oven Have an older reflow oven which I need to clean up collected flux residues from the chain, mesh, intake/exhaust areas, slides etc heavy brown dust, likely water soluble residues, lots of polymerized brown resin as well.

PTH crystal is malfunction when humidity is up to 90%

Jul 6, 2010 | yet ionically significant residue in the area of the board/part. We also suggest ensuring that the issue is not one of trapped flux residues underneath the body of the crystal, which could be shadowed in a cleaning process. And, yes, we have experienced issues with no-clean flux residues affecting the operation of the circuit. cheers ..rob

No Clean and Underfill

Mar 19, 2010 | No Clean and Underfill No clean pastes leave more flux residues. These can result in void formation and inhibtion of underfill curing. Selection of an underfill that is compatible with the flux residue is important. One company that has written about the effect of flux residues on underfill

Motherboard become NO POST when humidity increase to 90%

Nov 20, 2009 | when motherboard, IC, BGA designed to be smaller, then flux residue might potentially impact the PCBA impedance...Is this valid? As a result, many SMT companies used auto-brush machine where its brush away the flux residue at the PCBA bottom side. Thanks, Sean

flux residue problem

Sep 27, 2009 | flux residue problem flux residue problem Hi, Walter, Why don't you try no-clean flux? We ever met the same condition, later, we changed to no-clean flux solved the problem.

flux residue problem

Sep 3, 2009 | flux residue problem flux residue problem I have a customer that is having a flux residue problem after wave soldering. Flux is roaring through the board to the top side and leaving a residue. This is only happening on the flat stamped leads. The round leads are fine. They are using Superior #312 alcohol-based no

Vapor batch cleaning of flux residues

Aug 18, 2009 | Vapor batch cleaning of flux residues Vapor batch cleaning of flux residues We are looking for suppliers of liquid vapor degreaser batch equipment for flux residue cleaning of PCB’s. Any recommendations? Thanks

Flux residue

Aug 2, 2009 | Flux residue Flux residue Hi Mike, Greg, Thanks for the inputs...I will put up the photo for more discussion soon. Thanks, Sean

Flux residue

Jul 28, 2009 | Flux residue Flux residue Hi All, I have some question about flux residue resulted from non clean process as following: 1) Under what kind of circumstances that flux residue could appear? This residue does not happen during production but did appear after some period of time leaving factory. 2) How to clean this type of flux residue? 3) Is there any potentially that our wave machine parameter setting not optimized that could cause this flux residue appearance? If yes, which wave machine parameter setting that we should look into? 4)Is there any functional impact on the board if there is flux residue appear

No-clean, water-based flux residues after wave...

Feb 3, 2009 | No-clean, water-based flux residues after wave... No-clean, water-based flux residues after wave... Hi George This is down to the different cure temperatures used during PCB process. No problem with the flux or your settings You should be seeing a waxy greasy oil like substance on the dirtier board. Or the resist has absorbed the flux residues

No-clean, water-based flux residues after wave...

Feb 3, 2009 | No-clean, water-based flux residues after wave... No-clean, water-based flux residues after wave... The spec for all PCB suppliers is "solder mask over bare copper using LPI on external layers (green)". The flux we use is No clean 270WR flux (AIM). As far as process parameters, like I mentioned before, same parameters for several suppliers, only one shows more flux residues (or solder mask reaction to the flux as Stephen said)... Regards, George

No-clean, water-based flux residues after wave...

Feb 2, 2009 | No-clean, water-based flux residues after wave... No-clean, water-based flux residues after wave... Questions are: * What are the soldermasks used by your three board suppliers? * What tests have you run to assess the compatibility between these three soldermasks and your flux?

No-clean, water-based flux residues after wave...

Feb 2, 2009 | No-clean, water-based flux residues after wave... No-clean, water-based flux residues after wave... Hello everybody, We are running a product through wave solder process using three different PCB suppliers. I have noticed that you can see more flux residues (water-based, No-clean flux) on one supplier than on the other two. All three PCBs run

Selective soldering: sprayed flux residues

Dec 13, 2007 | Selective soldering: sprayed flux residues Selective soldering: sprayed flux residues You may want to try raising your pre-heater if you have one. I would also suggest trying different fluxes that may be a little more active so you can use less. What type of fluxer are you using? Selective solder flux residue is a gray area. This is one

Selective soldering: sprayed flux residues

Dec 11, 2007 | Selective soldering: sprayed flux residues Selective soldering: sprayed flux residues Hi everybody, Is there any criteria as far as No-clean flux residues surrounding solder joints when using selective solder machines? I have a Novastar SPA 400 and use flux NC kester 959. If I decrease the amount of flux, then I experience problems

Flux Residue on Heller MKIII

Sep 7, 2007 | Flux Residue on Heller MKIII Flux Residue on Heller MKIII Folks, we've recently upgraded to Heller MKIII reflow ovens with Gen 9 cooling units. We're running N2 atmosphere at 1000ppm O2 and Kester256 solder paste. We're seeing a big problem with flux residues building up in the cooling section of the process chamber

flux residue after HAL

Jan 17, 2007 | flux residue after HAL flux residue after HAL Hi...have you try ultrasonic cleaning before rinsing?

flux residue after HAL

Jan 15, 2007 | flux residue after HAL flux residue after HAL celsius or fahrenheit? I am not entirely familiar with the deeper details of HASL, but 130F-140F is adequate to clean many of the water-soluble fluxes used for component soldering.

flux residue after HAL

Jan 8, 2007 | flux residue after HAL flux residue after HAL The water soluble flux residue is staying there because the rinsing temperature it may be too low. The flux needs about 130-140 degrees celcius to become soft. If you are using water soluble flux, as per IPC A 610 standards it needs to be remove completely from the assemblies

flux residue after HAL

Jan 1, 2007 | flux residue after HAL flux residue after HAL Hi Happy New Year HASL fluxes Are very conductive so best advise is get it all off. thanks greg

flux residue after HAL

Dec 29, 2006 | flux residue after HAL flux residue after HAL About one year we have that problem with some of pcbs. Our customers told us about that. Because they can't mounting components on those pcb reason of flux residue. As you know flux not conductive chemical. We didn't change anything before having that. Now we think that we

flux residue after HAL

Dec 26, 2006 | flux residue after HAL flux residue after HAL What is the make-up of the residue? Is finding this residue new to your standard operation? What has changed?

Flux residue cause high false reject at ICT

Dec 20, 2006 | Flux residue cause high false reject at ICT Flux residue cause high false reject at ICT We use a solvent called AK-225ATE (there is also AK-225T) that works great for removing RMA flux residue and no-clean flux residue. Info at http://www.AK-225.com

Flux residue cause high false reject at ICT

Dec 20, 2006 | Flux residue cause high false reject at ICT Flux residue cause high false reject at ICT Consider it done Cheers Greg

Flux residue cause high false reject at ICT

Dec 19, 2006 | Flux residue cause high false reject at ICT Flux residue cause high false reject at ICT Well, you need to change your solder paste.There are pastes available in the market which are meant for ICT pin testability.

Flux residue cause high false reject at ICT

Dec 18, 2006 | Flux residue cause high false reject at ICT Flux residue cause high false reject at ICT Thanks, if you ever get round to producing those swabs, you can put me on the order list.

Flux residue cause high false reject at ICT

Dec 18, 2006 | Flux residue cause high false reject at ICT Flux residue cause high false reject at ICT Greg, Is there another way to check for those uncured plasticizers? How are they normally cured? If you could cure them yourself, I guess a difference would be noticable.

Flux residue cause high false reject at ICT

Dec 8, 2006 | Flux residue cause high false reject at ICT Flux residue cause high false reject at ICT Try flux buster ICT pins.

Flux residue cause high false reject at ICT

Nov 30, 2006 | Flux residue cause high false reject at ICT Flux residue cause high false reject at ICT This may be worth checking out are you sure it is flux residue and not undercured plasicizers coming from solder resists due to the higher Lead Free temperatures killing the undercured resist, this causes many no faults found and bridging, solderballs

Flux residue cause high false reject at ICT

Nov 29, 2006 | Flux residue cause high false reject at ICT Flux residue cause high false reject at ICT Dear All, I have 1 product that using solder bar from vendor called Asahi. After wave process, we found quite a sticky flux residue remain on the board. Eventually, have huge impact on our ICT fisrt pass yield(FPY). Current FPY is a the range of 80 to 85% only..Yield lost due to 20% to 15% false call. Do you have any idea to reduce this flux residue during wave process(Lead free)? Thanks for your time...

Flux residue cleaning procedure

Nov 9, 2006 | Flux residue cleaning procedure Flux residue cleaning procedure hams, whats the result?

Flux residue cleaning procedure

Nov 2, 2006 | Flux residue cleaning procedure Flux residue cleaning procedure Thank you very much for your reply, we'll try to perform your advice. I'll feedback you soon for the results. 'till then...

Flux residue cleaning procedure

Oct 31, 2006 | Flux residue cleaning procedure Flux residue cleaning procedure thanks for your reply, actually we bake the PCB assembly prior the rework because the package was exposed for quite some time already. The baking time was 24hrs @ 125 deg.C. We notice that there were flux residues on the connectors after the baking. We just neglect

Flux residue cleaning procedure

Oct 30, 2006 | Flux residue cleaning procedure Flux residue cleaning procedure thanks for your inputs,but what i meant was that a connector component beside the BGA for repair has some flux residue on its leads after baking, the BGA was Ok. we are wondering why this happened...pls enlightened us.

Low Flux Residue Solder Paste

Jun 21, 2006 | Low Flux Residue Solder Paste Low Flux Residue Solder Paste Thanks for all your help

Low Flux Residue Solder Paste

Jun 20, 2006 | Low Flux Residue Solder Paste Low Flux Residue Solder Paste We evaluated four SAC305 pastes. Of the four, we found Alpha OM-338 to appear to have the least flux residue. We also found it to be the most dull, least shiny, most non-SnPb looking of the four.

Low Flux Residue Solder Paste

Jun 16, 2006 | Low Flux Residue Solder Paste Low Flux Residue Solder Paste It's hard to say since cleanliness on my product may be acceptable, but may fail on yours. If you really are worried about flux residues, or need to pass some cleanliness spec, you may want to look into water soluable. Otherwise, most of the name brand No Clean

Low Flux Residue Solder Paste

Jun 14, 2006 | Low Flux Residue Solder Paste Low Flux Residue Solder Paste I'm looking for a No Clean low or an ultra low flux residue solderpaste (SAC305 and Sn/Pb). Any Recommendation? Is there something in the datasheet that will tell if a solder paste is really a low residues flux. Also is there a method to clean the fluxes off a low

Flux Residues In Lead Free Wave Soldeing Process

May 27, 2006 | Flux Residues In Lead Free Wave Soldering Process Flux Residues In Lead Free Wave Soldering Process HI, just my 0,00001 cents Which preheat system does your wave solder has? for instance ? - IR ? - Bottom only ? - IR + Forced Air ? (bottom) - IR + Forced Air (bottom) IR top ? PCB thickness ? Appropriate preheat is important when looking

Flux Residues In Lead Free Wave Soldeing Process

May 9, 2006 | Flux Residues In Lead Free Wave Soldeing Process Flux Residues In Lead Free Wave Soldeing Process Smartasp - What are your lead to hole ratios like? Dial down the flux and open up the holes, if you can. Keeping at least a 14-20 mil gap between min hole/max lead solves the hole fill problem. L

Flux Residues In Lead Free Wave Soldeing Process

Apr 12, 2006 | Flux Residues In Lead Free Wave Soldeing Process Flux Residues In Lead Free Wave Soldeing Process Samir - You and I need to go have a beer.

Flux Residues In Lead Free Wave Soldeing Process

Mar 30, 2006 | Flux Residues In Lead Free Wave Soldeing Process Flux Residues In Lead Free Wave Soldeing Process Does your fluxer provide for very fine atomization of the flux or is it more "droplet like" Great term huh?

Flux Residues In Lead Free Wave Soldeing Process

Mar 29, 2006 | Flux Residues In Lead Free Wave Soldeing Process Flux Residues In Lead Free Wave Soldeing Process He has been doing it for 12yrs now you know!

Flux Residues In Lead Free Wave Soldeing Process

Mar 29, 2006 | Flux Residues In Lead Free Wave Soldeing Process Flux Residues In Lead Free Wave Soldeing Process "After reading that, I have to go bang my head on the wave." Promise us you'll let it cool first, eh?

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