Peter,

We are a board producer and we have both finishes immersion tin and
immersion silver, we find it hard to tell the difference without measuring
them with X-Ray Fluorescence.

Ian

-----Original Message-----
From: Peter Lee [mailto:[log in to unmask]]
Sent: 17 June 2002 07:16
To: [log in to unmask]
Subject: [TN] PCB Finish


Technet,

I have a PCB sample with a white-ish dull finish, excellent flatness on
fine pitch and BGA pads. I don't have the pcb fab specs but can someone
tell by appearance what the surface plating finish is on the board?
Immersion silver? Or tin.


Rgds,
Peter

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