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?
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
Electronics Forum | Sat Apr 04 08:35:27 EDT 2009 | davef
Cause: Solder between the pad and the BGA on the pads being lifted has not melted. So, when you lift the BGA, you also lift those pads with the unmelted solder with the BGA. These pads are probably sinking the heat to a large copper plane in a inner
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
Electronics Forum | Thu Dec 26 12:41:53 EST 2019 | emeto
We agree with your statements. 1. Having manually printed board will compromise your print and you don't know how much paste you have on each pad. 2. LEDs falling off that easily might be related to contamination, considering that your profile is not
Electronics Forum | Wed Dec 04 10:59:04 EST 2019 | dwl
The solder looks a little grainy for Sn/Pb solder but that might just be the picture quality. There appears to be plenty of solder on the pads, so I'd rule out anything to do with the stencil. One possibility that springs to mind; how long is your
Electronics Forum | Tue Dec 03 18:51:57 EST 2019 | kylehunter
Hi all, We are having a confusing defect with one of our client's boards. It is a large board, 30" x 12". The client supplies the LEDs, they are cheap overseas diodes, and it is not uncommon to have reels with the packaging torn. We have w
Electronics Forum | Wed Nov 13 21:16:28 EST 2002 | Vinny
Hi All, I am producing a lot of high cost PCBA where the pCB material is the `ROGER' material. Due to some of the high components and handling we get pad lifted issues sometimes and as of now are unable to do repairs on these. Please help if anybo
Electronics Forum | Thu Nov 14 08:28:11 EST 2002 | dphilbrick
Rogers is a PWB materials manufacturer based in CT. they make a lot of unique materials for PWB fab such as a 1 time bendable PWB.
Electronics Forum | Thu Nov 14 08:30:34 EST 2002 | dphilbrick
Vinny I would call Rogers. Depending on what materail of theirs you are using it may require special processing. I would also send them one of your boards with defects they could probably tell you how to stop that from happening.
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