stencil cleaning

"stencil cleaning" search results in the Electronics Forums



9815 result s found for "stencil cleaning" in the Electronics Forums

Order by: Relevancy |   Date

Kiss selective solder flux

Feb 8, 2019 | BLT 31-41 "No Clean Selective Flux For Aerospace" On a Versaflow 3/45 Atomises well, good hole penetration, good wetting, cleans off well in the solvent cleaner. Use for SN100C, SA0307, and 60/40.

Urethane Coating - Universal Remover/Cleaner

Aug 15, 2018 | I know Kyzen and Zestron both have solutions for cleaning urethane. Are you cleaning it with your washer?

Missprinting cleaning

May 31, 2018 | Missprinting cleaning I wonder if I can convince corporate that we require 55 gallon drums of Vodka to clean circuit boards based on this post.

Has anyone heard of a no clean paste that can be cleaned in straight DI water ?

Feb 2, 2018 | Evtimov, no worries. I appreciate your knowledge and contributions over the years. Mike Konrad

Has anyone heard of a no clean paste that can be cleaned in straight DI water ?

Feb 2, 2018 | Mike, sorry for being aggressive on you! After all we are on this forum to help each other. Pleas

Has anyone heard of a no clean paste that can be cleaned in straight DI water ?

Feb 1, 2018 | Thank you Davef! That was overreaction to the seller - I don't deny anything.

Has anyone heard of a no clean paste that can be cleaned in straight DI water ?

Jan 31, 2018 | "...electro-chemical migration failures..." Come on Michael, You are totally selling it here.

Golden Finger contamination with Solder after reflow

Nov 15, 2017 | You don't clean contaminated gold fingers so much as you replace them. I once had the "cleaning" solution. It totally dissolved the gold fingers so that they could be replaced.

Best Fluid For SMT Nozzle Cleaning

Nov 7, 2017 | Best Fluid For P&P Nozzle Cleaning There are many not aggressive cleaning solutions out there that will do it. I used to use Simple Green for example.

Water wash flux and cleaning

Jun 19, 2017 | Water wash flux and cleaning You have a lot to think about! What does the flux manufacturer recommend as far as specifics like water temp or pressure? Do they recommend high temp di-water a detergent or saponifier? Do you currently have a cleaning machine, batch cleaner or inline? Do you have a water filtration system? Your flux manufacturer knows their flux chemistry better than anyone and they should be able to give you all the information you need regarding cleaning their product. If you have cleaning equipment in your facility such as a batch cleaner or an inline aqueous cleaner you need to make sure the equipment

How difficult is it to switch from a no-clean solder paste to a water soluble solder paste between builds on SMT line?

Mar 31, 2017 | How difficult is it to switch from a no-clean solder paste to a water soluble solder paste between builds on SMT line? Clean everything to do with the print process during the switch adequately and you shouldn't have an issue.

RoHS and Non-RoHS products in same ICT Fixture

Mar 27, 2017 | Just 2 cents, lead free flux residue is no clean?, how about leaded flux? how much flux residue it leaves on both types? is there a clean up procedure after wave solder? or is there a wave solder process?

No Clean flux with more solids

Mar 6, 2017 | No Clean flux with more solids The one i've been using on some thermally diverse boards with great success has been henkel loctite mfr 301. It's alcohol based not quite the solids you are looking for but close it's 5.5-6.5 solids and it is no clean.

Arguments against 1(or 2)-ethoxy-propanol (aka SC01)?

Jul 22, 2016 | Acetone has hazards other than flammability and odor including potential effects on the nervous system, skin, kidneys, GI tract, as well as blood and bone marrow according to the CDC. Perhaps you misunderstood what I was saying regarding alcohol; I was referring to the chemistry of foamable no-clean fluxes (for wave) I was not suggesting using IPA as a solvent. We would prefer no flammable solvents because of the hazards which is why we currently do not clean our no-clean fluxes. The preferred solvent for cleaning is clearly water but by our understanding this requires some different process technology (spray fluxing) and possibly cleaning equipment- but like I said I've seen a water bucket and drying shelf do the same thing for cheap.

DRY SOLDER ISSUE

Jul 1, 2016 | its spray fluxer we deassemble the nozzle clean and reassamble again. flux tank also clean with IPA. ya same problem in all product plz find the attachments about flux

Flux splatter issues

Feb 3, 2016 | Our company being an automotive supplier is all about quality control, not a clean room requiremen, This is a no clean process, all surface mount boards and Solitec ovens. Hopefully this answers your questions. Greg

Cleaning

Jan 13, 2016 | Cleaning Baking it's key for success on this task. Water evaporates @ 100 deg. C. Use that temperature, or higher, for that process and your problems or concerns can be taken care of. Be wise on your cleaning process, otherwise this could lead to failures too.

Cleaning a Used (Preowned) Selective Solder Machine

Sep 15, 2015 | Cleaning a Used (Preowned) Selective Solder Machine You should also remove all the pump parts and clean them, checking the bearings and seals. Clean completely the parts that allow the solder to flow back into the pot; ours have a spiral that fills with dross. Treat yourself to new nozzles. Tinning of a wet nozzle is critical so the solder flows over evenly. That can cause the most frustration in selective soldering. The metal erodes in RoHS solder so the top may not be square. Get the proper flux for the metal of the nozzle, usually stainless steel flux. If your machine has threaded nozzles, buy a tap and die to clean out the threads

Plasma Cleaning System reccomendations

May 28, 2015 | Plasma Cleaning System reccomendations I am the Sales Manager for Plasma Etch. We have systems starting at $7K for cleaning PCBs up to 4" x 7". Please contact me at plasmaetchsteve@aol.com Thank you.

Dendritic Growth

Mar 25, 2015 | Thanks by the information Mike, Another question for you is, the clean process must be developed even if we are using flux "no clean". Regards

Is NO CLEAN any better for High Speed PCB's?

Nov 20, 2014 | Is NO CLEAN any better for High Speed PCB's? -less power supply, and causing some impedance changes in the high speed data line. Currently the assemblies are run with water soluble organic flux and cleaned multiple times during the process with an aquastorm with the hurricane option and di-water. We are confident that the cleaning that is done is as good as can be done with water soluble flux. The customer is pushing us to try using No-Clean as a possible solution to the impedance changes they sometimes see. We tend to run no-clean on high volume, simple products that run and are shipped with little fuss. I don't have a lot of experience

Meridian 1020P servo wont start

Jul 9, 2014 | We have cleaned the encoders even though they look pretty clean. The function clear doesnt have any effect on the machine while it is in this state. Have not checked the mag tracks but will give it a look.

Cleaning old built up flux residues from reflow oven

Apr 30, 2014 | Cleaning old built up flux residues from reflow oven Sprite/Sugar as a solvent?!! I want to clean my oven now! In other words, this I GOTTA SEE. Ain't chemistry great? 'hege

Cleaning old built up flux residues from reflow oven

Apr 11, 2014 | 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.

Heller MK3 edge chain maintenance

Feb 13, 2014 | The manual says to bake the edge chains at 400C to clean them. Is anybody doing this ? I need to take my edge chains to a heat treat facility to clean them ? I don't want to spray oven cleaner on them as they appear to be plated with nickel or something.

Vapor Degreasing. Is it coming back? Is it the better choice for your cleaning process?

Sep 18, 2013 | Vapor Degreasing. Is it coming back? Is it the better choice for your cleaning process? That's great Paul. Would you share with us the methods and results of your study of the effectiveness of water versus vapor degreasing cleaning?

ERSA Selective Solder questions

Aug 28, 2013 | i've a competitor selective soldering and i would like test the adique acide to clean the nozzle. How much do you use approximativemely to clean a 8/4 mm nozzle?

Cleaning of misprints

Jul 26, 2013 | Cleaning of misprints We are looking at buying a dedicated machine for cleaning misprints. Does anyone have any experience with Smart Sonic or the other manufacturers? Any feedback is appreciated. Thanks

nozzle cleaning GSM

May 17, 2013 | nozzle cleaning GSM I am interested about the most effective way to clean the Nozzle for Universal GSM machine and which fluid to use?

Solder Paste Cleaning Procedure

Apr 3, 2013 | Solder Paste Cleaning Procedure We used to use Butyl-glycol then I ran out and someone said it was no longer available. or maybe it was cheaper without it. After you use that you clean off the Butyl-glycol with IPA (Isopropyl alcohol)

Cleaning for conformal coat

Jan 25, 2013 | Cleaning for conformal coat By "they've been through the wash cycle twice" what do you mean? What kind of cleaning process do you use? What sort of chemistry? How do you handle the assemblies after wash and before coating? Do the operators where power free gloves? -Phil

Manual/Schematic for Electrovert (ToolTronics) Ultra Clean II

Dec 1, 2012 | Manual/Schematic for Electrovert (ToolTronics) Ultra Clean II I am looking for any kind of documentation and schematics for an Tootronics/Electrovert Ultra Clean II. This particular model has what appears to be a Tooltronic Circuit/controller addition.

Cleaning paste-printed PCB

Sep 3, 2012 | Cleaning paste-printed PCB Is it a good idea to clean a paste-printed PCB when some printing defect comes and reprinting it ? Or can it be double-printed ?

Conformal Coating Issues

May 17, 2012 | Hi Dave, Thanks on yoru prompt reply, Can help to share whethere you had knowledge about this issues ?since I had a hot topic on this issues ? is my cleaning is not clean or is the saponifier chemical uyse is not compatable to the humiseal coating proces or any other opportunity that make tset

Underscreen cleaning cycles

Apr 26, 2012 | Underscreen cleaning cycles By default we clean after 10 cycles. Some boards are poorly designed and we end up doing it every 4 cycles

ionic residues on the surface of printed circuit assemblies

Sep 2, 2009 | Hi All, Let me summarize the key facts and findings: 1) This is not a permanent problem. Only one production batch was affected. The cleaning solution was exchanged and now the cleaning process runs normally. 2) Probably the residues are not ionic, maybe they have been caused by fur and /or calcium carbonate. 3) The problem is not caused by equipment. The washer and the cleaning process (time/temperature cycles) were inspected and any problems have not been reported. How can I clean the printed circuit assemblies from fur and/or calcium carbonate film if my cleaning solution had been

White residues

May 25, 2008 | Dear All, I would like to take your opinion about the result that we have faced after cleaning the PC assemblies in a cleaning machine (Miele Dishwasher) with the cleaning detergent Qualitek Everkleen 1005. We use DI water for cleaning purpose in the machine. The water temperature was 140 Degrees any comments that you can send me for helping me to get rid of those white residues and find a solution to have shiny solder joints after cleaning. Best regards, Necdet Ozyonum

Stencil Thickness

Jun 28, 2007 | Stencil Thickness Laser cut 0.13mm stencil thicknes works great for us. BTW, are we talking RoHS solder paste? We do reduce the stencil apertures to 88 % of the pads when we go for the RoHS solder paste. Otherwise we go fo 96% reduction in general with some excemptions. The reason for that is, the RoHS paste we use have a much better release from the stencil apertures. Except for the 0402:s and 0603:s where we use rounded corners on the stencil apertures, just for the paste release. On the very same boards we also have QFP: 0.5mm pitch and some heavy DC/DC converters (we overprint these bastards) along with BGA

SIR Testing

Jul 4, 2006 | Calling for an input from the Experts our there. Our customer is questioning the cleanliness of the no-clean product that we produced for them. We were asked to clean the board (localised cleaning) after rework (IC need to be changed due to an up rev.). Excessive touch up flux spreaded on the board plus bad localised cleaning (using IPA)has caused rejects cosmetically. This has been rectified, but about 200 boards were done badly. Customer is asking from us one fresh loaded board and one localise cleaned board for them to do the SIR test. This is the actual production board with the finest

Flux Compatibility Issues....

Jun 6, 2006 | , with a higher solids content, but can still be classed as no-clean. We run a no-clean process, but any flux added for hand assembly is always cleaned. No-clean flux in your paste, or wave assembly process that has been thru the full automated process should have all been adequately heated to render it inert, but when manually added for hand assembly, there is always flux that has not been fully heated left on the board. That is why we clean.

Necessity of ROSE in commercial quality processes

Feb 26, 2006 | Hi GS, Just a clarification� No-clean does NOT equal no ions. It equals less ions (at best). Automatic R.O.S.E (Resistivity Of Solvent Extract) testers are commonly used to detect ionic contamination from no-clean applications. Your comment regarding white residue after testing illustrates the degree of �invisible� contamination on a no-clean assembly. The IPA /DI water test solution does not cause residue rather it makes the no-clean residue visible. If one is to use an automatic ROSE tester to determine cleanliness, I would recommend that one choose a system utilizing �dynamic � technology over �static� technology. Dynamic testers (Zero-Ion and Ionograph) utilize a dynamic method which improves the detection of weak ions associated with no-clean fluxes. I hope this helps. Mike Konrad

Green inductors

Feb 20, 2006 | minute holes in its insulation. We have tried several paste manufacturers and we have tried both water soluble and no-clean paste. We are going to retest the no-clean because there is some question as to reaching the wrong conclusion. Hopefully, the no-clean will be the solution to that problem . If that's the case, the next problem would be cleaning the "no-clean" from the pcb. We have always used water soluble solder paste and water wash.

BGA Reballing

Dec 7, 2005 | I am attempting to reball some PBGA's with no luck. The problem is getting the solder spheres to sit in the stencil apertures and removing excess spheres. I apply light amount of flux to pads of a BGA, align a stencil over a BGA, then pour solder spheres. Some spheres get into the apertures , some apertures are empty . . . using a brush I gently try to removes excess ones but it just does not seem to work. Any suggestions? My mini stencil is 5 mils thick, apertures in the stencil are larger than the sphere diameter by approx. 10%-20% so that the stencil may come off after reflow. Also , the pads on the BGA are flat in some areas (after applying solder wick) and slightly spherical where the excess solder was removed but solder wick has not been applied. I have placed the stencil flat on the BGA . . . I also tried creating a standoff between the BGA and the stencil by applying Kapton tape

MPM forgets fiducials

Jun 23, 2005 | If you have concluded that it is not a file storage problem you may wish to consider - When setting up a job the camera can move to virtually any position. This does not mean that the actuators on the stencil or board have enough travel to align the two objects. You may do a test align into print position. Get the stencil in there and physically move it so that it aligned with the pcb with the naked eye. Then do up the screws etc. If you can't roughly align the pcb with the stencil with no actuator offsets - you may be in trouble. Your stencil could be poorly aligned with the frame so you cannot achieve a match. If this is in the X direction you should be able to move the board stop either mechanically or with the software to achieve a result. Y axis you should be able to move the stencil. R axis - take a grinder to the stencil frame so you can turn it some more. This may take some

CSP No clean residue

Dec 23, 2004 | CSP No clean residue The Jury is still out on no-clean reliability in the long term as no-clean didn't gain wide spread acceptance until the early 1990's. Also, in today's disposable society, few products are expected to last 15-20 years. Experience has shown that if your product has one or more of the following clean these gaps with the correct solvent delivered at the right temperature & pressure. When in doubt, Clean. Steve Stach Austin American Technology www.aat-corp.com (+1) 512-335-6400

CSP No clean residue

Dec 13, 2004 | CSP No clean residue Hi Scott - No clean assemblies have a very low tolerance for processing residues, and long term reliability is compromised if residues from incoming bare boards, components, or un-solublized flux residues are not dealt with. It is critical to control these aspects of cleanliness since a no clean process is not meant to go through cleaning, and cleaning is very difficult if a residue is discovered after assembly. To see some studies on this topic, visit our website at http://www.residues.com and look under our resources section

No Clean Solder Paste

Nov 17, 2004 | No Clean Solder Paste Pros are no need to clean after reflow. No need to buy a cleaner or worry about "wet" parts afterwards when you're trying to test your unit. Cons are that most leave a bit of a residue behind. It's harmless but may drive your bed-of-nails tester a bit buggy if your test points are probing the solder joints. If this is your first turn at no-clean, you'll probably notice an increase of solder balls as well. This is because your cleaner washed em off before. The best way around this is to use the standard homeplate design on your R's and Cs. This prevents th paste to squish out under your Rs

Board Cleaning

Feb 24, 2004 | Board Cleaning IPA is a poor choice for a cleaning solvent. * As you mentioned, the flash point of IPA (~12�C TCC). This is sufficiently low that all electrical equipment within a few feet of the bath should be flameproofed or intrinsically safe, if you don't want a fire. * IPA is a mild toxin and prolonged exposure (respiration or dermal) can cause headaches and symptoms akin to drunkenness. * IPA soup needs to be cleaned from the board, after cleaning it with IPA. For more, look here: http://www.devcon.com/techinfo/19650.pdf

Cleaner device for PCB

Jan 29, 2004 | Another equipment manufacturer is Smart Sonic. Most equipment manufacturers have their own chemistries, but they are also willing to use other cleaners. What we have done is to send boards that need to be cleaned to the equipment manufacturer. We tell them what cleaner we want to be used . They clean the boards and tell us what parameters we used to clean them. We take the boards back, finish populating them, and put them in test. If you're concerned with the microwave application - send test boards get them back and test them in the end use configuration. If you use a one chamber cleaning system, I would be afraid of cross contamination. One of our potential vendors hawked his one chamber machine, but we went with the 3 chamber for this reason. The vaporous hydrocarbon cleaning sounds like vapor degreasing. Problem with that is extensive system with condensers to condense any vapors

Cleaner device for PCB

Jan 29, 2004 | What kind of cleaning method you recommend for PCB - double side SMD (fine pitch and BGA components) and THT elements (PCB are for microwave application!!). Process technology no-clean.We have to remove grease-fingerprints, dust etc. It is low volume production. We are thinking about ultrasonics and spray devices so: - do you recommend 3-chamber machine (cleaning, rinsing, drying) or one chamber is enough effectiveness?? - what is your opinion about ultrasonics machine for fine pitch application in microwave application should i be concerned about damage solder joint or elements? - i have proposal to buy professional cleaner machine which is similar to dish wash machine - do you have any experience with this kind of stuff? -i have heard about new technology in cleaning system for PCB. it is cleaning in vapourus hydrocarbons so you don't have to immerse PCB. does anyone know

Defluxing Advanced Packages

StikNPeel™ Rework Stencils