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cleaning Electronics Forums search results
4464 results found for cleaning in 5s.
Showing matching items 1 - 50
- 100%
Re: Info. on Stencil cleaners - 11/29/99 -
- ... cleaning. ? Hand Cleaning ? Spray-In-Air Cleaning ? Ultrasonic Cleaning Hand Cleaning: Hand cleaning involves the removal of solder paste or adhesives from stencils using a chemically saturated wipe and / or rinsing the stencil in a sink or basin. Cleaning Performance: Because the cleaning process is completely manual, the degree of satisfactory cleanliness is completely determined by the operator. Manual cleaning provides the lowest degree of cleaning performance and consistency of all cleaning ...
- 99%
Freshman in SMT industry needing advice - 9/22/04 -
- ... the clean areas underneath the apertures as needed. Because the sponge requires little solvent(though it should be moist at the time of cleaning), it will evaporate to some extent due to the porous nature of the sponge. Waste disposal would be the same as with cleaning wipes, gloves and other paper product wastes that contain lead. "?ESawa's brochure states after cleaning with the Sawa Cleaner remove the stencil from the tray and wipe the top and bottom of the stencil with a clean, wet SMT wipe ...
- 99%
Cleanroom Basics - 6/24/05 -
- ... masks, when in a class 100 or lower clean room. People taking smoking breaks also need to weak face masks. Clean room garments are generally laundered via special clean room suppliers, and supplied back to you packed clean in plastic sealed bags. Make sure you have hangers for garments when not in use, as they don't need to be cleaned after each use, and you can use them a few times. 7. Make sure there is clean room mats installed in every entrance to clean peoples feet. After putting on the ...
- 99%
UltraSonic cleaning machine - 9/25/02 -
- ... Cleaning Solutions for Stencils and Misprints,? Proceedings of the 1999 NEPCON West Conference, pp. 94-97 5. Seto, P., and Loew, N., ?Stencil Cleaning,? SMT, May 2001, pp.66 ? 72 6. Richards, B., Burton, P., and Footner, P., ?Does Ultrasonic Cleaning of PCBs Cause Component Problems: An Appraisal,? IPC Technical Review, June 1990, pp.15 ? 27 7. Vuono, B., and Crawford, T., ?Ultrasonic Cleaning of Military PWAs,? EMPF TS0040, April 1991 8. Kenyon, W.G., ?Ultrasonic Cleaning Acceptance Accelerates ...
- 99%
Cleanning no clean residu - 10/19/07 -
- ... clean residu Hi Rob, I must take issue with your statement ?By definition, no clean solder can be not-cleaned?. All no-clean fluxes can be cleaned. Whether or not one cleans no-clean depends on a variety of factors. More than eighty percent of all post reflow flux residues being cleaned today are no-clean. Although that sounds like a strange irony, there is a logical reason. While many applications do not require cleaning, some do. Many contract assemblers operate a no-clean line and just clean ...
- 99%
Solder Pallet Maintenance? - 7/11/07 -
- ... cleaning results is ideal - for cleaning pallets that would be 40 kHz at 10 - 15 watts / liter power density. Q: Can the same stencil cleaner be used for cleaning pallets, stencils and misprinted PCBs? A: Yes. However, the post-solder flux residue from pallets is a different contaminant than cleaning solder paste from stencils and misprints. Pallet-cleaning will require water temperatures too warm for the safe cleaning of stencils (stencils are heat-sensitive). Most Smart Sonic users that clean ...
- 98%
Stencil cleaners. - 7/17/06 -
- ... Aside from cleaning efficiency, other factors to consider include: Can the process potentially damage the stencil? Is the process also used for cleaning misprinted PCBs? What is the environmental impact? User safety? Versatility? The best article I have seen written on the subject is ?SMT Stencil Cleaning: A Decision That Could Impact Production? by Richard S. Clouthier. Mr. Clouthier, of Xerox when the article was published, reviews several different chemistries and cleaning technologies. We ...
- 98%
Stencil Cleaner - 3/28/02 -
- ... post solder flux residue is designed for cleaning in plain water without cleaning chemical additives. The real advantage of water washable flux was that it cleaned in plain water without additives ? no chemicals to manage in the wash or waste stream. However, when OA solder paste was first introduced, the virgin solder paste did not easily clean in plain water. What advantage was a chemical-free post solder cleaning process if the presolder cleaning of stencils and misprints required chemical ...
- 97%
Re: When using noclean flux or clean flux process? - 9/22/99 -
- ... acid). No clean residues are benign on a board surface and act as electrical insulators. | ? Organic acid fluxes have active ingredients such as organic hydrohalides, amines, and amides. These fluxes are water soluble since they contain no rosin. Good cleaning is critical with these flux types since their residues are corrosive and electrically conductive. | | You're correct that cleaning flux from boards adds cost and loads the environment, but "no-clean" fluxes are not really clean. They leave ...
- 97%
Cleaning Machine and Chemistry - 2/19/01 -
- Cleaning Machine and Chemistry Hello Mark, I wish it were that simple so I could direct you to a particular manufacturer and stencil cleaner model. Unfortunately, there are several issues complicating the process of cleaning all these applications in one machine. First and foremost is; what chemistry do you use that will clean both solder paste and adhesive? There are chemistries that will clean both (Smart Sonic?s 440-R SMT Detergent being one) but these chemistries usually require different ...
- 97%
Flux Designations and Composition - 7/12/04 -
- ... all normal & burn-in tests just by cleaning the residues of the No Clean Flux. ? No-clean flux residues can be either cleanable or not cleanable. The not cleanable type leave a milky white residue on the solder connection after suitable soaking in water. Your flux supplier will have suggestions on the appropriate flux. ? Clean the (no-clean) assembly (post wave). The less on there to begin with, the less cleaning required. sidebar: Why clean no clean? Use water soluble flux!!! Low Residues: This ...
- 97%
Freshman in SMT industry needing advice - 3/29/04 -
- ... to change from manual cleaning to automated stencil cleaning are: ? Manual cleaning is not consistent ? quality is totally in the operators hands ? Contamination left on the stencil and in the apertures from manual cleaning will cause paste transfer issues, insufficients, bridging and/or solder balling. ? Manual cleaning causes dings, dents, screen tension problems that lead to co-planarity, misregistration, misprint and stencil replacement problems. ? Manual cleaning can be hazardous to the ...
- 97%
Removal of No-Clean flux residue - 9/5/01 -
- ... of No-Clean flux residue Hello Jeff, If you have components on your board be careful of how low the frequency is that you will be applying to your board. Ultrasonics are great for cleaning stencils and bare boards at around 40kHz. These frequencies (and Lower)may however have negative repercussions to certain components. The last thing you want is clean but damaged components. You may raise your frequency for longer cleaning times at a less aggressive frequency or run multisonic cleaning with a ...
- 97%
and through tight spaces - 10/12/99 -
- Re: Cleaning under, around, and through tight spaces | | | A question for you all! | | | | | | Back in the good old days, we didn't always know how clean was clean. Much has changed. Much hasn't. | | | | | | My question concerns cleaning under, through, and around tight spaces. Way back when, we could not clean under 20 mil pitch QFP's because the water molecules (that was the reason often given) couldn't evacuate particulate material left under components. What's changed - especially concerning ...
- 97%
and through tight spaces - 1/6/99 -
- Re: Cleaning under, around, and through tight spaces | | A question for you all! | | | | Back in the good old days, we didn't always know how clean was clean. Much has changed. Much hasn't. | | | | My question concerns cleaning under, through, and around tight spaces. Way back when, we could not clean under 20 mil pitch QFP's because the water molecules (that was the reason often given) couldn't evacuate particulate material left under components. What's changed - especially concerning CSP's as ...
- 97%
Pallet Maintenance - 3/5/01 -
- ... for cleaning stencils at ambient temperature and one for cleaning pallets at approximately 120 degrees F. The 2003 machine will cost more because it has two ultrasonic wash tanks. A single tank Smart Sonic Stencil Cleaner can be used if pallets only require cleaning every 5-7 days. The single tank would be used for cleaning solder paste at ambient temperature for 5-7 days then, when the wash water is ready to be changed, the solution can be heated to 120 degrees F. and the pallets may be cleaned ...
- 97%
Cleaning after repair. - 1/23/03 -
- ... conductive and corrosive. This is why you have to clean the board. Spot cleaning using a chemical saturated Q-tip or wipe is OK if the board is rinsed free of the cleaning chemical. The only think worse then flux left on a board is cleaning chemical left on a board. Most cleaning chemicals are high pH, very ionic, and in many cases, corrosive. Great care should be exercised to remove the cleaning chemical from the board. In addition, cleaning a board with a chemically saturated wipe or Q-tip ...
- 96%
Stencil Cleaners - 4/4/06 -
- ... stencil cleaning systems De-fluxing and stencil cleaning chemicals www.aqueoustech.com Austin American Technology Batch and inline de-fluxers Spray-in-air stencil cleaning systems De-fluxing and stencil cleaning chemicals www.aat-corp.com UnitDesign Batch de-fluxers Manual stencil cleaning systems www.unitdesign.com SmartSonic Ultrasonic stencil cleaning systems Stencil cleaning chemicals www.smartsonic.com PMR Systems Ultrasonic stencil cleaning systems Stencil cleaning chemicals ...
- 96%
cleaning of no clean flux - 8/10/05 -
- cleaning of no clean flux Comments are: * Sounds like it's necessary to clean "heareous F381, F352 no clean solder paste" in your application. Consider a paste that may be better suited to your application. * If you're cleaning "low residue flux", consider using an organic acid flux? OA fluxes are much easier and cheaper to clean than low res. * Other RF applications have avoided cleaning of low res fluxes. Flux suppliers say things like: -- This material has been utilized on various assemblies ...
- 96%
Aqueous Cleaning Systems - 2/6/03 -
- ... machine is capable of cleaning as good or better than an inline machine. This is a fact. Batch machines, because they are not limited by a fixed conveyor length, are capable of cleaning or drying for as long as is required to obtain clean and dry boards. Con: Batch machines are not as fast as inline machines. Although a batch machine can clean multiple boards at one time, high throughput can only be achieved if you have high quantities of boards ready for cleaning at one time. If your production ...
- 96%
Stencil Cleaner - 3/28/02 -
- Stencil Cleaner Hi Dave, No-clean paste is more difficult to remove in post-reflow cleaning applications. In stencil, misprint and tool cleaning applications however, no-clean paste poses no extra degree of cleaning difficulty. There are few special requirements of a stencil cleaning system. Basic requirements are: The ability to handle a chemistry (required for no-clean paste removal). A filtration system, although not required, will extend the life of the wash solution thereby lowering ...
- 96%
Re: Cleaning of 'No-Clean' paste - 9/13/99 -
- ... clean solder pastes are easier to clean than the newer "hybrid" no-cleans. Some solder paste mfgrs. use parafins and other binders to help improve the printability of their solder paste. Unfortunately, these additives sometimes make the paste more difficult to clean. If you are concerned about your particular solder paste, Smart Sonic will test clean it for at no charge. | You are correct in your assessment that no-clean pastes are difficult to clean. | | I understand why you would need to clean ...
- 96%
Re: Adhesive Dispenser Vs. Screen Printing Adhesives Pros and Cons - 10/12/00 -
- ... used to clean stencils are generally considered hazardous material (acetone, xylol, etc), this adds a safety concern to manual cleaning. In addition, the safety and prevention of exposure to solvents are paramount to the operator staff. Frequent Stencil Cleaning is required (every 2 ? 3 hrs.) to avoid aperture clogging. Manual Cleaning of Adhesive from Stencil is totally ?not acceptable?. - Adhesive Cleaner @ $95.00 / 1 pkt. Of 100 pre-saturated clothe. (Usage of 6 to 8 clothe/cleaning) Or a ...
- 96%
Cleanning no clean residu - 10/19/07 -
- Cleanning no clean residu By definition, no clean solder can be not-cleaned. The solder/flux are formulated to result in low ionic-contamination, hence, no cleaning. I have, however, always had at least one customer that requests their no-clean solder get cleaned. No-clean solder is used post aqueous wash, for parts that are wash incompatible, but the customer wanted no visible residue. If this is your own product, you can prove out the efficiency of not cleaning the no-clean operations by a ...
- 96%
New Mega II with Pre-Wash Feature--Press Release - 4/6/98 -
- ... PWBs, precision cleaning for pre-wire bonding applications and pre-conformal coating, as well as tight-tolerance cleaning under flip chip and post ball attachment cleaning of BGAs. The Pre-Wash feature has extended the Mega? II's capabilities to include the removal of silicones, oils and salts in precision metal cleaning. The fully automated cleaner comes with precision process control, data logging and ultrasonic capabilities with applications in critical metal parts cleaning. A password ...
- 96%
Note for cleaning process - 6/26/08 -
- Note for cleaning process Water will not remove no clean flux residues because they are not water soluble. Solder paste with no clean flux should only be used when the assemblies do not need to be cleaned. That said, you can buy special cleaning solvents specifically for removing no clean flux residues if you must clean the assemblies and are stuck using the no clean paste. The better way to go if you need a clean assembly is to use solder paste that has water soluble flux in it ...
- 96%
Water Soluble for No Clean BGA Balls - 4/13/04 -
- ... for No Clean BGA Balls Hey Dreamy, Dave is correct. If you attempt to clean your water soluble (OA) flux with water only, you will turn the no-clean flux white. No inspector or end-user will accept this. If a proper cleaning system is not available to you, then I would recommend one of two things. 1. Utilize a contract cleaning service to properly clean your assemblies. We operate one (www.aqueoustech.com) and so does Austin America (www.aat-corp.com). 2. Buy cans of Micro-Care cleaning ...
- 96%
clean process vs non clean process - 4/2/04 -
- clean process vs non clean process There is no shortage of reasons to clean your boards. Soldering or reflowing your boards leaves ?stuff? on them. This ?stuff? is normally corrosive and conductive (some fluxes / pastes are more corrosive / conductive than others). In either case, if you do not desire any residue on your boards, clean them. Military, medical, space, flight, and other boards all require specific levels of cleanliness. In most cases, these levels are only accomplished via cleaning ...
- 96%
Re: When using noclean flux or clean flux process? - 9/21/99 -
- ... acid). No clean residues are benign on a board surface and act as electrical insulators. ? Organic acid fluxes have active ingredients such as organic hydrohalides, amines, and amides. These fluxes are water soluble since they contain no rosin. Good cleaning is critical with these flux types since their residues are corrosive and electrically conductive. You're correct that cleaning flux from boards adds cost and loads the environment, but "no-clean" fluxes are not really clean. They leave a ...
- 96%
Re: Cleaning Asm. After using noclean flux - 3/26/98 -
- Re: Cleaning Asm. After using noclean flux | | | Is there anyone out there required by their customer to clean the finget tab contacts even after using noclean paste? We have been asked to clean even though we don't have any flux residue on the contacts. Any ideas? | | | Mike | | | | Yes and often. People still are concerned how clean is clean. So how clean is it? | | Concurrency needs to apply all across the board from no clean suppliers, to cleaning | | process capabilities, to industry, to ...
- 95%
Clean the No-Clean - 2/13/06 -
- Clean the No-Clean Cleaning no-clean is the pitts. If cleaning required migrate to water soluble. Can IPC help here? No cleans only need to be removed per IPC if the joint inspection is inhibited...and in general if form-fit-funciton is not achievable. But then there is always that annoying customer who insists it be removed merely on the basis of cosmetics (even though the product is burried in a chassis, kept in a dimly lit dungeon in an Artic region) I will assume this is a customer driven ...
- 95%
No-Clean Wave Flux - Water Wash - 3/25/04 -
- No-Clean Wave Flux - Water Wash I ran into the same problem. What I had is a customer that required us to use a No Clean because of the Low flux activity then they want it cleaned. Well to clean the No clean your going to use such a high percentage of cleaner in your sapinifer that it almost becomes acidic. Thus I suggest go with the Water soluable which is High activity flux but you can clean it with water. "CHEAP" The whole point of No clean was to save money in the manufacturing process thus ...
- 95%
Clean the No-Clean - 2/13/06 -
- Clean the No-Clean Hello, I am automating a process on our floor from wire solder hand application to dispensed paste and reflow. The process involves "lidding" a shielding lid around our assemblies for microwave quieting. The result is non-hermetic. For cosmetic purposes, we need to clean the residue on the exterior of the part, but we need to use no-clean as we cannot reliably clean the internal residue. With the hand soldering application an ultrasonic IPA bath did the trick, but with the ...
- 95%
cleaning of no clean flux - 8/10/05 -
- cleaning of no clean flux we are using heareous F381, F352 no clean solder paste. specially in qfp for high frequency board we observe that cleaing / removing of ' no clean flux 'is require. if we do not clean same most of time after all test & envioumental test it shows pin to pin contact short & if we clean ' no clean flux' pin to pin no short. is it necessary to clean ' no clean flux ...
- 95%
No-Clean Process - 7/28/04 -
- No-Clean Process very difficult to say that all no cleans must be cleaned for reliability. Cleaning in its own right causes many problems i.e leaving wax residues and activators from incorrectly cleaned no clean pastes, terrible to get off. Decent no clean liquid fluxes should completely volatise away so I always recommend if possible not to clean but if visible white powder(weak benign organic acid) is left then process the boards through a reflow oven at glue profile temps and this should ...
- 95%
No Clean Solder/WS Flux - 10/29/02 -
- No Clean Solder/WS Flux from my experience, no clean mean "difficult and cannot clean" Normally, you will observe white residue when cleaning it. You should study the flux in the no-clean solder cream before cleaning it. Or change no clean solder to clean type solder
- 95%
cleaning NO clean - 9/17/02 -
- cleaning NO clean No-Clean fluxes are difficult to clean off boards. Cleaning effectivness depends on the washer, the chemistry, the flux type, number of reflows, and the time between reflow and washing. White residue is flux residues that have started to break down but were not completly removed. Fine pitched compoents are harder to clean basicaly becouse it is more dificult to reach the area between the leads. I have tried a number of chemistries to clean no-cleans and adhesive from boards and ...
- 95%
Re: Ultrasonic stencil cleaner - 4/14/98 -
- ... alcohol blends and/or other hazardous ingredients. 2) It must clean all types of solder paste. Just cleaning a selected few types of solder paste will tie the hands of production or require two or more stencil cleaning processes. The Smart Sonic stencil cleaning equipment, when using 440-R SMT Detergent, is guaranteed to clean any type of solder paste from any fine-pitch stencil...or your money back! 3) The chemistry must clean at ambient temperatures. Stencils are heat sensitive. The epoxy glue ...
- 95%
Re: Washing boards with paste...? - 9/15/98 -
- ... switch from RMA to no-clean flux, they assume that alcohol will work as well. Alcohol is NOT a good solvent for cleaning most no-clean and OA solder pastes. Because of it's combustability and explosive hazard, it cannot be used in an ultrasonic tank (nor should it be used inside a spray chamber - reports of explosions involving stencil cleaners using alcohol really scare me). You're right, ultrasonic tanks can be expensive. However, keep in mind, when cleaning misprinted PCBs, you only need an ...
- 95%
Couple questions for Dave - 9/17/98 -
- ... to a customer that our no-clean process does not leave excessive residue? Any ideas? | Wayne: More of the same as Chry and Justin. | KEY ISSUE | The first thing that you need to know is: What does your customer mean by clean? If your customer wants you to prove that your no-clean board is clean, what?s their spec? | THE SPEC | ANSI/J-STD-001B says that you can have up to 10.07 ugm/square inch of NaCl equivalent on the board and still be clean. That's not real clean. LT 6 ugm per square is ...
- 95%
Kyzen or Zestron? - 6/11/07 -
- ... Aqueous cleaning has been more challenging as electronic assemblies move toward increasingly dense circuit designs, populated with low standoff components, and the move toward Pb-free. To address these challenges, Kyzen works closely with customers, solder material companies, and cleaning equipment companies to design cleaning fluids that address customer needs. Cleaning fluids are built to support different cleaning equipment designs. For your application, Kyzen offers aqueous cleaning fluids ...
- 95%
Possible to water wash no-clean solder paste boards? - 7/14/05 -
- ... to water wash no-clean solder paste boards? Here is a link to a specific article about cleaning no-clean assemblies: http://www.residues.com/pdfs/Clean_No_Clean.pdf Our facility does a lot of contract cleaning and cleanliness testing for various companies around the world, and that study should give you a good base synopsis of what to do and what to expect when cleaning a no-clean assembly Sara Gorcos ...
- 95%
Re: help help! Water clean for CSP/BGA package - 10/5/99 -
- ... nonsense talked about in cleaning than any other subject (soldering included!). Very few vendors really know much about it. After all, in pre-Montreal Protocol days, it was said that "slosh it around in a bucket of Freon and it will be clean", yet a real scientific study, because of environmental pressures, shows that CFC-113 azeotrope cleaning was one of the worst from the point of view of quality. Many of us were conned by this for years upon years. Water cleaning will give excellent results ...
- 95%
Cleanning no clean residu - 10/19/07 -
- Cleanning no clean residu Really, if you start out from the beginning planning to clean the boards, then DON'T use the no-clean flux! The way that stuff is made, it leaves a hard, low-solubility residue that takes a LOT of effort to get clean. If you plan to clean, use a water soluble flux, it will wash off with MUCH less effort. On some specific boards, we have used no-clean flux, but needed to clean just a couple components, and found it to be very hard to get it clean. Jon
- 95%
Necessity of ROSE in commercial quality processes - 3/2/06 -
- ... finished analysis of no-clean fluxes and Ionic contamination and cleaning processes. The results were eye opening. Summary: If you clean a no-clean you better do a good job. Many no-cleans produce a "waxy binder" to encapsulate the troublesome ions. Identical process as in the old RMA days. No difference. If you didn't clean an RMA then why clean a no-clean now? I would: Use BELCORE certified, halogen free materials, verify your thermal process for no-cleans (good profile), control you flux ...
- 95%
Re: Cleaning Asm. After using noclean flux - 3/19/98 -
- Re: Cleaning Asm. After using noclean flux | | | Is there anyone out there required by their customer to clean the finget tab contacts even after using noclean paste? We have been asked to clean even though we don't have any flux residue on the contacts. Any ideas? | | | Mike | | | | Yes and often. People still are concerned how clean is clean. So how clean is it? | | Concurrency needs to apply all across the board from no clean suppliers, to cleaning | | process capabilities, to industry, to ...
- 95%
No-Clean or water - 6/10/01 -
- No-Clean or water Hi Jacob, NC vs WS, what a story! No-clean paste means no-clean for your products but what a mess it makes in your reflow systems. If you are a contract maunufacturer of high volume production, then No-Clean is they way to go. This helps keep your costs down, since you do not need cleaning. One thing to consider is if your customers require you to clean the boards. Some customers (especialy) government products, still require cleaning even when no-clean paste is used. This ...
- 95%
Effective Alternatives To Stencil Cleaning - 2/21/01 -
- ... contract back to the same position). Check for dings and dents. A good stencil cleaning process should help reduce or eliminate all of these potential problems. Solder paste will dry in apertures as hard as cement. If a cleaning process did not clean the solder paste when it was fresh, it is unlikely able to clean dry solder paste. The Smart Sonic process will also clean dry solder paste. I have a contract manufacturer customer that inventories hundreds of stencils. He justified the purchase of ...
- 95%
Water Soluble vs. No Clean - 5/2/06 -
- ... vs. No Clean We manufacturer cleaning equipment (full disclosure) so, our answer may seem self-serving. The facts however are accurate and relevant so here I go? Changing from an OA (water soluble) flux to a no-clean flux makes sense. After all, even die-hard cleaning proponents like me can concede the fact that not all assemblies have to be cleaned. Please note the fact that I did not say ?not all assemblies would benefit from cleaning?. To be clear, all assemblies benefit from cleaning ...
- 95%
Re: no-clean process / Got Dendritus Eh? - 9/26/98 -
- ... you can define your process and resolve this issue. No-clean or OA? My guess, for high rel products, OA NOT no-clean. Regards, Graham Graham.Naisbitt@concoat.co.uk | | i am working on a no-clean process implementation project in a company. i want to change a board to no-clean which had dendrite problems underneath the small resistors on the bottom side(in smt).i want more information on the exact cause of dendrites and whether no-clean is the solution. | | | Dendrites are metallic fibers that ...
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