Steve: Why would someone choose thick immersion silver over thin?
Bob: Some believe thick[er] immersion coatings have longer shelf life and/or increased capacity for multiple thermal excursions. A few folks even make the mistake of specifying immersion silver as a final, permanent finish. A mistake made easier by believing thicker makes everything just fine. 

Steve: Are these different chemistries?
Bob: More likely variations of a basic immersion silver chemistry. All immersion coating thicknesses can be varied by manipulating such aspects as temperature, dwell time, even pH. 


Robert "Bob" Lazzara, CIT
Tel: (603) 318-3075

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steven Kelly
Sent: Monday, August 10, 2015 3:47 PM
To: [log in to unmask]
Subject: [TN] immersion silver

Hi All,
Why would someone choose thick immersion silver over thin? Are these different chemistries? Regards Steve Kelly


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