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BGA soldering pads - how do you repair them?

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    #1

    BGA soldering pads - how do you repair them?

    Does anyone have any experience with damaged BGA soldering pads?I mean the soldering pads on PCB.
    I would guess that a thin( but how much thin ??) copper wire and a glue( but which one is the best) could help.

    I desoldered CPU that has about 1000 pads and one pad was damaged( it is 1.2V core voltage).
    I noticed that there are more pads with the same core voltage. Must be all 1.2V soldered or it is not so critical if one is not soldered?
    Not sure if all 1.2V must be present.
    Thank you for your feedbacks
    Tags: None
    #2
    Re: BGA soldering pads - how do you repair them?

    Good luck with that, its probably soldered between alot of layers impossible imo. Also there might be several pads for that voltage. Checked the schematic ?
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      #3
      Re: BGA soldering pads - how do you repair them?

      Take a picture of the BGA area on the PCB

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        #4
        Re: BGA soldering pads - how do you repair them?

        1, 2 or 3 pads with Luck may be strapped, but like reecey said, Good Luck is a must ...

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          #5
          Re: BGA soldering pads - how do you repair them?

          I would say if there's already a decent number VCore pads you could try skipping this one. Especially if that's not the highest power rated CPU you can have on this package.
          OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

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            #6
            Re: BGA soldering pads - how do you repair them?

            difficult job. There is repair wire in electronics parts shop. It is much thinner than wire wrap wire and is isolated (green). It is used for PCB repair and named as that.

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              #7
              Re: BGA soldering pads - how do you repair them?

              you cant use copper for that, it will desolve into the solder.

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                #8
                Re: BGA soldering pads - how do you repair them?

                Hello,
                When i have this kind of problems i use thin coper wire from desoldering braid. I make a small loop that i position where the pad was then i route the coper wire beetween other pads to the nearest point i can solder it to. I use UV PCB paint to isolate and in the same time to glue the coper wire to the pcb. Often i use a smaller ball for that particular pad. I had to use this method 3 times by now, the oldest being about 2,5 years ago, no problem untill now.

                I belive there is a video on youtube that shows better what i tried to describe

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