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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
Fax: +44 (0)1202 678028
DDI: +44 (0)1202 338222
Mob: +44 (0)7887 997403
[log in to unmask]
www.PartnerTech.co.uk
-----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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