Scratches on BGA solder resist

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I have been trying to tell people at work that minor scratch... - Feb 27, 2007 by Roderick Ray

IPC-A-600G, 2.9 Solder Resist [Solder Mask] [snip]"Solder r... - Feb 27, 2007 by davef

Hi Roderick, Guess it depends on how you define "minor". ... - Feb 28, 2007 by Real Chunks

Roderick Ray

#48016

Scratches on BGA solder resist | 27 February, 2007

I have been trying to tell people at work that minor scratches on solder resist on BGA will not effect functionality of BGA, instead they want to attempt repair of these scratches. Any suggestions.

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davef

#48021

Scratches on BGA solder resist | 27 February, 2007

IPC-A-600G, 2.9 Solder Resist [Solder Mask] [snip]"Solder resists are used to limit and control the application of solder to selected areas of the printed circuit board during assembly soldering operations and are sometimes used to reduce dendritic filament growth[s] between conductive patterns over the printed board's base material surface. Detailed specifications and information regarding solder resist requirements are contained in IPC-6012 and IPC-SM-840."[snip]

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Real Chunks

#48032

Scratches on BGA solder resist | 28 February, 2007

Hi Roderick,

Guess it depends on how you define "minor". If it is just a visual blemish in the mask, there will be no affect o the BGA. If it is through the resist there may be a chance of solder shorting, which will affect it, I doubt it but possible.

Take your worst case and run it. The proof is in the product.

Now why are your people looking so hard at the boards?

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