Good Morning and Your help is appreciated to figure out what a
discoloration is under the solder mask of a bare board which does not
change after one reflow temperature cycle.

 

The Prebake and Postbake photos are in my PCB Inspection Photos Gallery
at the TechNet Group Site 
http://ipc-technet.groupsite.com/galleries?page=3

 

What is it?... Delam, or Inner Core Bond Enhance Anomaly, or something
else...?

 

Thanks for your help with this.

 

John Balchunas

Supplier Quality Engineer

Email: [log in to unmask] <mailto:[log in to unmask]> 

Tel: 763-278-2249

Fax: 763-767-4635

 

 


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