relies on the exchange of metals and the exposure of underlying copper, therefore, immersion deposits are quite thin, usually less than one micron thick--just a scant thousand atoms or so.
Processes normally subcontracted by mediocre fabricators include silver-filled via, laser drilling, gold immersion plating
, and sometimes testing.
While there is still some wet processing in the metallization and immersion plating
(FIGURE 3), this technology does not generate the humongous volumes of wastewater and sludge that common etching creates.
The universal electrolyte is suitable for reel-to-reel plating, brush plating, selective immersion plating
and jet plating.