It sounds like the customer does not want anyone to be able to easily reverse engineer their product. A label might be easily removed, allowing someone to identify the component used.

I suspect that you will either have to use mechanical abrasion or laser the marking off, but you would have to be careful that the laser does not create excess heat. I'm not really familiar with laser marking, but I would imagine that using a laser to obliterate existing markings might be somewhat extensive.

Blair

>>> [log in to unmask] 06/01/04 09:04AM >>>
Put a label over the markings.
Dave C.

-----Original Message-----
From: Guy Ramsey [mailto:[log in to unmask]] 
Sent: Thursday, May 27, 2004 9:55 AM
To: [log in to unmask] 
Subject: Re: [TN] Part Marking Removal


I have seen the marks hidden with black epoxy ink.

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Andre Leclair
> Sent: Thursday, May 27, 2004 10:22 AM
> To: [log in to unmask] 
> Subject: [TN] Part Marking Removal
>
> Hi All
>
> We have a customer that would like us to remove the
> Manufacture Logos and part#s from 4 parts on their assemblies
> (PLCCs and QFPs).
>
> Acetone and Alcohol were both tried with zero deterioration
> of the markings.
> I suspect the parts have been Laser Marked.
> What would you suggest
> Mechanical Abrasion?
> Chemical What type?
> marking Laser (we have access to one)?
> Volumes would be about 2000 ICs/month
>
> This would likely have to be done after placement (QA's request).
>
> Thanks for any input
>
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