Repairing balls on BGA's

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Trying to come up with a way to repair or replace damaged or... - Jul 07, 2003 by

There are companies that provide technologies to do this: M... - Jul 07, 2003 by CAL

Hi Reman01, I have done that before when I was in Motorol... - Jul 09, 2003 by

Hi! One technique: 1. Remove all balls 2.Make a mask(sten... - Jul 10, 2003 by Evtimov

> Hi! One technique: 1. Remove all balls 2.Make > a... - Jul 17, 2003 by Sanjeev Chandra

Reman01

#25082

Repairing balls on BGA's | 7 July, 2003

Trying to come up with a way to repair or replace damaged or missing balls on BGA's. Has anyone done or tried to do this?

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CAL

#25083

Repairing balls on BGA's | 7 July, 2003

There are companies that provide technologies to do this: Manncorp has a unit - http://www.manncorp.com/p-m-7500rb.htm

and

Winslow Automation - http://www.winslowautomation.com

and

http://www.ape.com/reball_kits.html

and companies providing this service:

WWW.ACIUSA.ORG

AND

www.smttools.COM

Both are very different so evaluate upon your needs. I DO HAVE CONTACT INFORMATION SO PLEASE TOUCH BASE WITH ME FOR PEOPLES INFO.

aLSO, WWW.GOOGLE.COM WILL PRODUCE MORE information if need be.

Good luck, Cal

Communications Test Design, Inc. www.ctdi.com

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Veronica

#25109

Repairing balls on BGA's | 9 July, 2003

Hi Reman01,

I have done that before when I was in Motorola. What kind of ball are you trying to repair? How many pieces of BGA chip do you need to repair a day? If it is not too many, you can do it by yourself. It is a lot, such as 100 to 1000 pieces a day, then you need to source for two to three venders to do it for your company 'cause one vender may raise up the price to a level that is not acceptable.

I hope this will help.

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Evtimov

#25124

Repairing balls on BGA's | 10 July, 2003

Hi! One technique: 1. Remove all balls 2.Make a mask(stensil)for reballing.The holes of the mask must be 0.8-0.9 the size of the pads. 3. Reball chips 4. Reflow chips Good luck

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Sanjeev Chandra

#25197

Repairing balls on BGA's | 17 July, 2003

> Hi! One technique: 1. Remove all balls 2.Make > a mask(stensil)for reballing.The holes of the > mask must be 0.8-0.9 the size of the pads. 3. > Reball chips 4. Reflow chips Good luck

Yes,we have done quite a bit of reballing of BGAs with a good success rate.You can follow these steps:

1.Clean the surafce of BGA by removing all the balls and flattening the surface with solder wick. 2.Apply flux paste on the surface. 3.Get a stencil for reballing 4.Align the stencil and reball the BGA 5.Reflow the BGA

Sanjeev

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