Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Mirror ball

Omat Marasigan

#10198

Mirror ball | 12 August, 1999

Hello everyone,

I would like to know more about the so called FACETED or "Mirror ball" surface apperance. Its cause and how to eliminate / corrective actions for it.

pls. help...

thanks and best regargs, ...Omat

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#10199

Re: Mirror ball | 12 August, 1999

| Hello everyone, | | I would like to know more about the so called FACETED or "Mirror ball" surface apperance. Its cause and how to eliminate / corrective actions for it. | | pls. help... | | thanks and best regargs, | ...Omat | Omat While I haven't heard of these effects it sounds like you might be describing a cold, or more accurately, a disturbed solder joint. This will result in a grainy sort of appearence that might look faceted. It is caused by movement of the joint while cooling and is more common with non-eutectic solder like 60/40. Common causes are components shifting position or a vibration in the belt or rail transport. good luck John Thorup | | |

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