Some folks use the fiducial for the x-ray.
Inner layer traces nearby mess that up.
Rex
Rex Waygood
Technical Manager
Hansatech EMS provides value manufacturing through engineering and quality
Hansatech EMS Limited
Benson Road
Nuffield Industrial Estate
Poole
Dorset BH17 0RY
United Kingdom
Tel: 01202 338200
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DDI: 01202 338222
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of prashant chopra
Sent: 20 February 2012 09:35
To: [log in to unmask]
Subject: [TN] Query -- Fiducial
Hi,
I have a query related to the Fiducial being placed on the PWA. Someone from technology recommended that we should not place any trace on the inner layers below the fiducial.
What is the reasoning behind this? Is it requirement for the Paste Printing and SMT placement machines, so that it can recognize the fiducial in a better way? Is this required?
Appreciate your comments and input on this.
Thanks.
Rgds
Prashant
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