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what is a half etched fiducial

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Vamsi.krishna

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Hi all,

One of my customer asked for a half etched fiducial. Can anyone explain? its very urgent

Thanks in advance,
Vamsi
 

I don't know why you would want a half etched fiducial, but a fiducial is
a etched marks or drilled hole used for optical positioning during assembly processes.


Two types of Fiducial :

1. Local Fiducial


2. Global Fiducial
 

I know "half etched" only from stencils, it's actually "half-lasered" in recent stencil technology and the usual way to apply fiducials and text on solder mask stencils. Half etched for PCB doesn't seem to serve a purpose.
 

Second FVMs reply, this is common practice for permantly marking stainless steel stencils
 
I just know the half etched fiducial is using for the stencil projects,not PCB.
 

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