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July 2008

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Subject:
From:
Rex Waygood <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Rex Waygood <[log in to unmask]>
Date:
Thu, 17 Jul 2008 16:00:39 +0100
Content-Type:
text/plain
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text/plain (78 lines)
Edding 751 paint pens
Use 4 dots of 4 colours gives about 256 numbers (I think)
And it won't come off in normal operation, passes through reflow and can
be read (normally)
Rex


Rex Waygood
Technical Manager
 

Tel: +44 (0)1202 674333
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ioan Tempea
Sent: 17 July 2008 15:35
To: [log in to unmask]
Subject: [TN] Indelible marking

Dear Technos,

 

I need to serialize about 200 BGAs (simply write on them sequential
numbers 1-200). The BGAs will be assembled, SnPb process with water
soluble flux, then washed in plain water in our in-line washer.

 

In case the customer will not accept us scratching the numbers onto the
top of the components, what kind of permanent ink can I use?

 

And would you see any issue with scratching the top of the components?

 

Thanks,

 

Ioan


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