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01-06-2003, 23:49
| #2 (permalink) |
| Freak Poster   Join Date: Oct 2002 Age: 41
Posts: 423
Member: 16452 Status: Offline Thanks Meter: 4 | You can looking how to use solder paste to reball BGA http://www.cellular-parts.com/trainningBGA.asp |
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01-07-2003, 01:49
| #3 (permalink) |
| Freak Poster Join Date: May 2002 Location: Perth, Western Australia Age: 45
Posts: 313
Member: 11937 Status: Offline Thanks Meter: 1 | hey There are two types of reballing kits, one with pre-made solder balls which is shown in that link, and the other one with the grey solder paste which you fill the holes with |
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01-07-2003, 06:28
| #4 (permalink) |
| Freak Poster Join Date: Jul 2002 Location: MAD Age: 50
Posts: 483
Member: 13545 Status: Offline Thanks Meter: 2 | Thx 4 ur reply ... but Scaramouche is right ...this totorial is how to place SOLDER BALLS on BGA ..... i need how to use solder paste to rebll BGA ...any links ...? OR can and one exlain it here in this forum ...? |
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01-07-2003, 06:38
| #5 (permalink) |
| Freak Poster Join Date: May 2002 Location: Perth, Western Australia Age: 45
Posts: 313
Member: 11937 Status: Offline Thanks Meter: 1 | I have the solder paste kit. Basically, you take the BGA off the phone, clean all the solder pads until they are nice & shiny. You place the BGA in the holder, and you cover it with the stencil. The stencil is a sheet of metal with tiny holes which correspond to the pads on the BGA. So you align this stencil with the holes to the BGA pads. You then take some of the BGA paste, and put it on the stencil. You then use this rubber shovel, to spread the paste into the holes in the stencil, so all the holes are filled with paste. You then **** hot air onto the stencil, and the paste in the holes melts and forms balls on the pad. When it cools, you remove the stencil. You then **** hot air on the balls, to give them better shape & make sure they stick. You use a toothbrush to clean away any flakes of solder between the balls, and thats it!!! This is VERY frustrating, especially, when you have 63 good balls but 1 ball not formed. You have to clean the BGA, clean the stencil, and start again. |
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