Chemistry: analytical and immunological testing – Metal or metal containing – Cu – ag – au
Reexamination Certificate
2007-04-17
2007-04-17
Soderquist, Arlen (Department: 1743)
Chemistry: analytical and immunological testing
Metal or metal containing
Cu, ag, au
C422S075000, C422S079000, C422S077000, C436S043000, C436S050000, C436S051000, C436S073000, C436S150000, C436S151000, C436S166000
Reexamination Certificate
active
10412484
ABSTRACT:
Embodiments of the invention provide an analytical method and analytical reagent solutions for determining the concentration of electrolyte components, such as copper, acid and chloride constituents in an acid or basic metal plating bath using a chemical analyzer. Common methods for measuring the concentration of copper general require two reagent solutions/two steps. This invention provides a novel analytical reagent solution that simplifies the chelating, buffering, and cleaning functions of separate regent solutions required for measuring electrolyte concentration. This has the benefits of reducing chemical inventory and associated dispensing equipment, and thus reducing chemical consumption.
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Applied Materials Inc.
Patterson & Sheridan LLP
Soderquist Arlen
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