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76 PCB007 MAGAZINE I APRIL 2018 and chloride. Temperature is the sixth param- eter. Although many parameters affect plat- ing distribution, chemical concentrations are some of the most important and most influen- tial. These need to be controlled as they change faster than an y of the other parameters. • Better chemical control also serves to: • Identify process problems • Reduce human error • Enhance product reliability • Tighten operating windows • Reduce chemical operating costs Figure 1: The influence of plating parameters and what happens if the concentration goes up. The first five parameters can be automatically analyzed and controlled. Figure 2: Visible analysis using the Hull Cell is one of the oldest analytical techniques. Additions to the Hull Cell can be scaled up to show what should be added to the production tanks.