FAQs on Plating, Final Finishes and Decorative
How does Copper Gobbler save dollars for PCB
Copper Gobbler is a copper digester that works
Uyemura’s acid copper chemistry in a system
Plate. EZ Plate eliminates the need for copper
thus removing the primary source of nodules; reduces downtime for maintenance
and dummying; ends anode sludge clean-up and reduces copper costs. The
also produces an end result visibly superior to ordinary copper plating.
How can Uyemura’s ENIG be gentler on solder
Because we run at low temperature, and our ENIG formula
has zero chlorides.
What are ENIG’s main advantages for printed
and what component assembly methods are compatible
Wave soldering, solder fusing and wire bonding
are all compatible with electroless
nickel immersion gold finishes. ENIG creates a
highly solderable surface that won’t
discolor, or tarnish, and it provides exceptional
electrical continuity. The nickel
component provides a barrier against copper diffusion
and guards against
contamination of the solder during soldering and
re-work. ENIG also contributes
What is meant by the term “direct gold”
and where is direct gold used?
Direct gold is application directly on copper
– without nickel. Direct gold is used primarily
wherever RF interference is a factor.
What are the most compelling advantages of Uyemura
GT platinized anodes?
No micro-pores, and no micro-cracks—thus
longer life. Also, these rigid frameless
platinum anodes can be double or single-sided,
and are manufactured in several
What is “white bronze?”
White bronze is a white version of Miralloy, the
electroplating alloy combination of tin,
copper and zinc that’s become the preferred
alternative to nickel for many applications.
Among these applications are jewelry, zippers,
buttons and other products that contact
the skin. About 20% of the population has a dermatological
reaction to nickel, and
no-nickel Miralloy eliminates this problem. White
bronze Miralloy is inert, long-lived
and tarnish-free. There’s also a lead-free
What alternatives are there to silver and nickel
for the connector and
electronic component industries, where there’s
an issue over intermodulation
Miralloy, the copper-tin-zinc alloy, produces
a bright, white finish and provides
excellent corrosion performance, high solderability
and conductivity. It is also
diamagnetic, and won’t tarnish.
Does “white bronze” also have other uses?
Yes. In addition to being an excellent finish
for products such as jewelry and zippers
and other consumer products that contact the skin,
white bronze is an excellent finish
for countertops in physicians offices and hospitals,
on knife racks and shelving in
restaurants, on door knobs – and on bathroom
fixtures, changing tables, toys, etc.
What makes EtchBOND copper surface treatment superior
to black oxide?
EtchBOND has peel strength substantially higher
than any hot or “low temperature”
black oxide treatments.
Is there a solution to “black pad”
or “black nickel” defects in electroless
nickel immersion gold used in the PCB industry?
The black pad seen with ENIG processing causes
solder joint failure and low shear
forces after assembly. It indicates a problem
with the nickel bath that causes nickel
corrosion during immersion gold deposition. Uyemura’s
KAT ENIG process was
engineered specifically to eliminate it, while
Are there alternatives to watts, sulfamate or
sulfate-based baths that
deliver higher throwing power for electrolytic
Uyemura’s Thru-Nic process provides substantially
higher throwing power for your
nickel plating process – users typically
experience a 5-fold increase in throwing power
over standard nickel systems. Thru-Nic AMT is
engineered specifically for PC board
applications; Thru-Nic CL is formulated for ceramic
IC packages and general
Is there a way to reduce or eliminate the need
for dummy plating?
Yes. Uyemura’s Nimuden NPR4, NPR6, NPR8, and HDX+D
electroless nickel baths eliminate
dummy plating and wasted chemistry. When operated
with Uyemura’s StarLine Dash NP
Chemical controller, the most consistent, most
reliable plating results can be achieved.
From an operations standpoint, what's the main advantage of Nickstar
decorative black nickel plating, compared to conventional black nickel?
Nickstar can be operated at higher current density to get better plating coverage,
specifically 5-8 asf vs. 1-3 asf.
How does Nickstar's cycle time compare to older black nickel?
Nickstar achieves a deep black deposit in 5-10 minutes, compared with 15-20 minutes
required by traditional black nickel products.
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