Electronics Forum: terminal (Page 1 of 94)

SMT Chip terminal lifted

Electronics Forum | Mon Jan 17 02:02:38 EST 2000 | PC

Can anyone there please tell me what can cause the SMt chip terminal lifted? This happen quite often and I can't find the rootcause for this problem. Does it cause by material/Placement?? Thanks

Solder splash from component terminal

Electronics Forum | Sun Feb 12 22:52:20 EST 2017 | ltchsze

Hi fellow professionals, Wondering whether anyone has experience with solder splashing from component terminal. Have identified the source using the component without printing solder paste on PCB. Wondering the root-cause of the solder splashing fr

Re: SMT Chip terminal lifted

Electronics Forum | Wed Jan 19 02:00:36 EST 2000 | erico

Hi wolfgang, I think Pc is not talking about the tombstone cause this terminal lifted is different from tombstone. The terminal of chip is still there but can not be solder anymore so we have to replace the chip. I also facing this problem. So can yo

Solder splash from component terminal

Electronics Forum | Tue Feb 21 16:39:03 EST 2017 | ltchsze

Thanks for input, dyoungquist. The condition here is without any flux or paste applied. Solder from component terminal started splashing by itself when put through re-flow.

Re: SMT Chip terminal lifted

Electronics Forum | Thu Jan 20 11:20:28 EST 2000 | Brian W.

It sounds like what you are seeing is leaching of the end cap. You need to check the manufacturer's spec. Many components have terminal barriers, which get a solder plating. Sometimes this plating process is not done well, and the solder plating le

Re: SMT Chip terminal lifted

Electronics Forum | Thu Jan 20 11:16:51 EST 2000 | Wolfgang Busko

Erico:I can�t even imagine what this line looks like and what it has to do with the soldering problems without having a look at it. Also the restriction to touchup only is somewhat irritating to me. The only thing that I can think of is that in your

Re: SMT Chip terminal lifted

Electronics Forum | Wed Jan 26 01:25:37 EST 2000 | erico

Hi guys, Thanks for help. It really help.

Re: SMT Chip terminal lifted

Electronics Forum | Thu Jan 20 02:36:29 EST 2000 | erico

Hi wolfgang,Dave & PC: What I facing are: 1. The component lie flat on the board but only one side can get solder.The pad is ok, problem is with the chip. 2.I desolder the chip and go to view it under microscope and found that there is a line near t

Re: SMT Chip terminal lifted

Electronics Forum | Mon Jan 17 04:25:50 EST 2000 | Wolfgang Busko

PC: I guess you talk about something called tombstoning. About causes and adequate countermeasures you will find enough material when you browse the archive with this search item. Try also "tombstone". Good luck Wolfgang

Re: SMT Chip terminal lifted

Electronics Forum | Wed Jan 19 11:52:34 EST 2000 | Dave F

PC and Erico: Are yinns talking: 1 A component that will not lie flat on the board? 2 A component that will lie flat to the board that you can't get to solder to the pad? 3 A pad that is no longer attached to the board? 4 Something else. Whazit?

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