Electronics Forum | Thu Nov 22 07:21:36 EST 2018 | mermarinc
Hey!Thanks for sharing.
Electronics Forum | Fri Nov 16 07:55:17 EST 2018 | robl
Hi Prem, We used to place millions of Nickel battery tabs using Cobar paste. We found it particularly aggressive. Just contact your local Cobar distributor and ask them for samples of their most aggressive fluxed paste. Kind regards, Rob.
Electronics Forum | Fri Nov 16 08:41:34 EST 2018 | davef
Here's a similar thread earlier in SMTnet FORUM -- Soldering to a nickel plated battery terminal [ https://smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=17474&#Message71990 ] We still have our neighborhood Batteries+ attach so
Electronics Forum | Wed Nov 21 05:57:30 EST 2018 | premkumar_haribabu
Hi Robl, Thanks for your qucik reply!! , i understand if we use aggresive flux that we can impove solder wetting over nickel plate vs PCB pads & we need to solder through 12 zones reflow oven. Prem
Electronics Forum | Fri Nov 16 09:04:40 EST 2018 | robl
and here.... https://smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=9389&#Message37375 Which was in the days of leaded, but the ROHS paste had the same flux formulation.
Electronics Forum | Mon Nov 26 13:40:40 EST 2018 | robl
Hi Prem, Yes, the flux in the Cobar paste helped with wetting and joint strength, as does reducing voids as there is more solder in the joint, as does cooling rate. Regarding peel test in KG, it depends on the pad size and volume of solder in the j
Electronics Forum | Wed Nov 21 06:07:20 EST 2018 | robl
Hi Prem, Voiding has lots of causes, but boiling off flux to quickly really doesn't help, so maybe a more gentle profile. Also you do not need to print a solid block of paste, you can print a window pain style pad to help the flux escape. Also, th
Electronics Forum | Fri Nov 16 03:38:03 EST 2018 | premkumar_haribabu
Hi all, We have to solder a nickel tabs ( coming in SMT reels ) in to HASL PCB finish pads using refow oven & during this we facing poor wetting issues, more voids & we done pull strenth , its came out with in 1 kg ,I doubt that nickel coated materi
Electronics Forum | Wed Nov 21 06:01:57 EST 2018 | premkumar_haribabu
Hi Davef, Thanks for your quick reply , just my inputs - we using 99.99 % pure nickel strip for soldeirng & when we do manual soldering this nickle stips its working well but when coming to SMT reflow even after high peak temperature ,its removes ev
Electronics Forum | Fri Nov 23 05:59:18 EST 2018 | premkumar_haribabu
Hi RObl, Thanks for response , sorry to ask again & again . Is cobar paste solved the issues from poor wetting from nickel to PCB soldering,whether it will improve the peel off strenth more than 5 kg ?? as per our current last production , this nic
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