Competence

Wire Drawing Technology

Processing of Round, Rectangular and Flat Wires

Electroplating can be applied to various shapes through die machining,
cassette-roller die machining, and combination of turks-roller and die machining.

Competence

The wire has uniform plating thickness even on the edges and flat parts of flat wire. Sumitomo Electric strives to design that offers insertion and retaining power for connectors.

Good Insertability: Enabled by smoothing after electroplating, the wire has good insertability into printed circuits of connector elements by flatness and uniform plating thickness on the edges of rectangular wires.

Good Solderability: Nickel or copper underplating is interposited between tin-plated layer and brass rectangular wire to prevent metal diffusion - extremely smooth surface facilitates soldering.

Low Contact Resistance: Combination of sharp edges of rectangular wire and tin-plated layer with low contact-resistance facilitates reliable connection.

No Whiskers: Reflow to tin plating layer and smooth finishing prevent whiskers to eliminate unexpected accidental short circuits.

Skin Pass Process

For Connectors

- Flat wires with high oblateness (0.64 x 1.5mm, 0.64 x 2.3mm) are available.
- Plating on the entire wires surface (uniform plating on corners) are available.

- Smooth finish by die machining facilitates soldering for skin pass surface and ensures uniformity of plating to the edges of rectangular wires.

High Plating Quality Assurance by Imaging Sensor and Flaw Detector: - Sumitomo Electric's electroplated wires are employed in the automotive industry that requires high level of quality control.