Acid Copper

SUNGJINLOGIS forms a stable acid copper leveling base layer to support downstream nickel/chrome appearance and thickness uniformity.

Leveling Base Layer

Forms a smooth, leveling foundation that directly affects downstream nickel/chrome appearance and supports spec-compliant quality.

Uniform Thickness & Appearance

Standardizes current, agitation, and bath conditions to minimize area variation and thickness deviation at corners and holes.

Stable Production

Reduces defect and rework risk through filtration/contamination control and data-driven replenishment management.

Control Points

Key control items to secure acid copper base-layer quality (leveling/thickness/appearance).

• Maintain target concentrations of CuSO₄ / free acid (H₂SO₄) / Cl⁻ to keep deposition stable

• Manage additives (brightener/leveler/carrier) to ensure consistent appearance, leveling, and ductility

• Standardize current density/voltage/time to minimize thickness variation (operate recipes by part/rack)

• Control temperature/agitation/circulation (flow rate) to stabilize plating rate and appearance uniformity

• Use continuous filtration + anode bag management to reduce sludge/particle carry-in

• Manage rinsing and drag-out to minimize contamination and bath fluctuation risk

• Run periodic Hull Cell tests/analysis to check bath condition and additive balance

• Maintain jigs and electrical contacts to prevent burning, skips, and other electrical defects

We ensure process reliability through measurable data and testing.

• Manage before/after data for condition changes through in-house thickness measurement (XRF/thickness gauge) and appearance evaluation

• Diagnose bath condition, additive balance, and defects (burning/stripes) via Hull Cell testing

• Ensure traceability by recording process history (analysis values/replenishment/filtration/changes)

• Process control and 대응 based on quality system requirements (SQ/ISO, etc.)

Applied to product groups with high appearance/spec requirements.

• Appearance-sensitive parts such as automotive interior/decor trims (foundation for downstream nickel/chrome quality)

• Mobile brackets and decorative parts where smoothness and appearance completeness are critical

• Products with large area/geometry variations requiring thickness uniformity and spec compliance

Photos of the acid copper process equipment.