I was wondering if I could get some inputs from
some of you more experienced with this type of requirement. We have a customer
asking for immersion gold on pads and electroplated gold on fingers. During our
review process for processing several ideas as to how to process came up
and I would like to get some of your comments and experiences has to the process
suggestions and recommendations.
Process #1: First Tape ENIG area and
electroplate fingers. second, tape fingers and plate ENIG. Lots of handing and
evaluation of tape to use required.
Process #2: First Plate complete panels with ENIG.
Second tape panel except for fingers and plate electroplated gold over the
top.
Possible bake suggested to improve adhesion of
electroplate gold to immersion gold.
Is their anyone out there currently doing this
process?
What is the adhesion of electroplated gold to
immersion?
What would baking accomplish and harm?
Thanks in advance.
Scott