Order by: Relevancy | Date
Apr 4, 2019 | No Clean OSP process cause ICT testing issue due to Flux building in testvia hole will require specific probe designs and pin pressures to insure penetration and self=cleaning. Change probe styles, materials and spring forces. Develop a solid maintenance program to clean the probes Clean your boards Change your fixture design Ask vendors [eg, Ingun, IDI, QATech, Everett Charles
Sep 28, 2018 | .etc. And the line pattern is formed after development. Second, chemical cleaning Equipment: chemical cleaning machine Function: a. Remove oxides, garbage, etc. on the surface of Cu; b. roughen the surface of Cu to enhance the bonding between the surface of Cu and the photographic oil or dry film. Method for detecting the effect of washing plate: a. Water film test, requirement Factors affecting the washing board: degreasing speed, degreaser concentration, micro-etching temperature, total acidity, Cu2 concentration, pressure, speed Defects that are easy to produce: open circuit (poor cleaning results in film ), short circuit (cleaning does not produce garbage)
Aug 30, 2018 | First suspect PCB contamination - clean the boards, bake/dry them, try again.
Nov 8, 2017 | Best Fluid For P&P Nozzle Cleaning
Nov 6, 2017 | Do I need to have an Ionic Contamination tester if my process is no-clean?
Aug 18, 2017 | Ultrasonic works fine for squeegees.
Aug 2, 2017 | with few hicups. The downfall is maintenance and cleaning. Difficult to clean dross out of the solder pot, and fluxer cleaning. The Seho GoWave is a nice little machine designed for moderate usage. We bought this new 10yrs ago and no problems as of yet. It's very easy to clean, operate, and maintain
Jun 20, 2017 | Thank you for the detailed input. That gave me material to think on.
May 15, 2017 | Thank you very much.
Apr 28, 2017 | You might want to attempt doing this in a clean room.
Apr 7, 2017 | How difficult is it to switch from a no-clean solder paste to a water soluble solder paste between builds on SMT line? jng123, Process-wise using one solder paste type is preferred regardless of paste type. If you want clean both paste types in one cleaning machine your manufacturer might have, this potentially could lead to white residue issue due to chemical reaction in rinsing bath. In order to clean both
Mar 24, 2017 | Thanks Charlie & Jerry, subtlety is not something I have ever been accused of in the past.
Mar 23, 2017 | Rob, Just wanted you to know......I got it.
Mar 23, 2017 | Yep I know, British humour.
Mar 23, 2017 | You should drawing the attention of large contract manufacturers and large supply chain players.
Mar 3, 2017 | What kind of flux you looking for water based, alcohol based, or solvent based
Mar 2, 2017 | Would you specify a part number?
Mar 2, 2017 | Our Senju Sparkle Flux contains 8% solids and is a NC.
Nov 14, 2016 | Get yourself a refractometer and ask the solvent manufacturer what the brix reading should be.
Oct 29, 2016 | Amtech 4300 no-clean+washable flux Posting here because all the threads asking for feedback on it are locked. We have been extremely happy with the 4300 tacky flux for BGA attachment. Not only is it both washable and no-clean (i.e. wash-optional), it was also the only tacky flux that could consistently deal with a batch of marginal-ENIG-finish boards we got (which would otherwise have been scrapped; the vendor was scrapped regardless of course!). It really does wash off using only water. Warm DI water in a cheap ultrasonic gives outstandingly clean results (we always use the ultrasonic for cleaning underneath BGAs, it
Jul 6, 2016 | I was thinking placing it on an esd mat during cleaning.
Jul 6, 2016 | What about grounding the board while you are cleaning it to immediately disspate the static?
Nov 24, 2015 | Federal Standard 209E
Nov 23, 2015 | Thankyou Davef, Is there any IPC standards related to(Calls) these ISO 14698,14644 standards.
Dec 21, 2014 | oh we also immersion silver finish our PCB's.
Dec 9, 2014 | SAC305 (Alpha OM - 338 PT) (88.5%) T3
Nov 26, 2014 | Thanks SWAG. I will clean up all of the connectors, reseat and hope for the best!
Jul 29, 2013 | Ahh...now I understand. So much for any of my solutions :) cheers, ..rob
Apr 3, 2013 | Thank you
Aug 31, 2012 | First off - There should be no issue with washing your OA/water soluble boards with the other customer's no clean units provided that the recipe being used has been validated to effectively clean each product. If your supplier is using a batch system, the wash time, temp and number of rinses should be something they can show are based on study or at least MFG'r recommendation for the cleaning solution. Has the supplier verified that their machine is functioning properly? Spray bars spinning? Wash solution is within correct % range? Chamber is not overloaded causing shadowing? Does your product have difficult to clean areas? Low standoff components such as BGAs, LGAs, QFNs, jam nut receptacles? Are there post wash hand add steps (at supplier or in your own facility) where the wrong flux or too much flux is being used and not activated by soldering temps? Does your supplier have
May 22, 2012 | Patrick, correct, no clean alcohol based. Machine is a Vitonics Delta Wave.
May 11, 2012 | We also go with 10 cycles, adjusting from that point if needed.
Mar 20, 2012 | Using Indium 1075-EX30 for our Ersaflow Selective and Electrovert Wave machines. Works very well.
Nov 27, 2011 | company have cleaning machine It should not contaminate on PCB's surface or efficiency of cleaning machine is poor. please see contaminate2 Sometime Cu attach on fine pitch and effect to short circuit on board. So I need some kindly help as below 1) Can I trust supplier result? 2) How I improve cleaning machine? 3) How to check efficiency of cleaning machine? 4) Does this contaminate usually happen on SMT process? SMT have to set cleaner machine. Can I claim to PCB's supplier to improve? I will wait kindly suggest . Best regards, Siaomuay
Oct 31, 2011 | What kind of flux/solder paste are you using water soluble or no clean
Oct 28, 2011 | I was talking about pick and place machines. When you say clean what are you talking about?
Jun 29, 2011 | PCB Washing No Clean Let's be more specific. Why do you need to clean the boards? I assume it is for testing purposes, probe contact concerns and the like. This is the only economical reason I can think of to clean no-clean flux residue from your assemblies. Before you go the route of a glorified dishwasher, what
Apr 11, 2011 | Wipe off your linear scales and clean your quadalign lense.
Jan 17, 2011 | All: I am reaching out to get some suggestions on the right flux to use as well as a recommended cleaning process for soldering a KOVAR RF shield using 80/20 Au/Sn solder to a ceramic hybrid. The recommended profile is 4-5 min at 280C and at least 1 min over 310C from the preform vendor. We are able to hit this profile. Our process is to flux a ceramic board (2 mils thic of flux), place a 3 mil 80/20 preform and then place the KOVAR shield. The issues we have seen are excessive flux residue then cannot be cleaned (no clean tacky flux) or the flux burns a re dark black and then cannot be removed (water soluable). 1. Does anyone have a recommended flux that can withstand these profile temps? 2. Does anyone know how to clean flux residue from Kovar? BWET
Jan 13, 2011 | Cleaning a No Clean We have a customer whom we have built boards for. They want a "cleaner no clean look". The process uses a no clean Kester 256 SN63 solder paste. After reflow the "residue" noted by the client is too much. We have tried a few things. We are a small shop with a closed acqueous cleaner. We have gone
Nov 17, 2010 | Why not just re-tin the parts?
Nov 17, 2010 | Cleaning Leads on Parts We have a problem child part. Our company was in a pinch and ordered parts from a broker that had an old date code. The leads are very oxidized, and our reflow process is comprimised. To prove the concept, we cleaned the leads with Tarn X and an acid brush. After cleaning they were rinsed in DI or process for cleaning leads. What side effects do I pose if the process is correct?
Nov 2, 2010 | Does anyone have an opinion on using a SWIFFER dust mop for cleaning SMT line equipment?
Sep 15, 2010 | kester 562 clean process and this leaded part.
Sep 2, 2010 | GooGone followed by a water wash
Jul 14, 2010 | Clean to No Clean Process for some papers that may help: http://www.smtinfo.net/Db/_No-Clean%20Technology.html Additional points are: * Some low res fluxes are cleanable * Recognize that some products just don't do well with low
May 4, 2010 | Rinse them clean. Blow them out with some shop air. And let them dry in an oven for awhile.
Apr 15, 2010 | Will this work for Tin Immersion plating or does anyone have suggestions on what will work?
Feb 3, 2010 | The Ove Glove, Works great and is MUCH less expensive.
Feb 3, 2010 | We use woven Kevlar gloves and gauntlets. Try Ansell or similar manufacturers. Pete B.
Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196