The copper strip for lead frame is iron bronze, the main brands are C19400 (QFe2.5) and c192100 (qfe0.1). C192100 (qfe0.1) has good thermal conductivity, but low strength, especially poor softening resistance. However, C19400 (QFe2.5) belongs to medium strength and medium conductivity alloy, which is adopted by our company's users and has good application effect.

According to our in-depth investigation, the lead frame copper strip used by the company's customers needs to be coated, punched (or etched) into a small lead, and the lead wire is welded with relevant components, and packaged with ceramic or resin. The thickness tolerance of the thin strip produced and sold by our company is 0.005 ~ 0.008mm, the side bend is less than 1mm / m, and the shearing burr is less than 0.0 02mm, plate type below 20i, ensure that there is no warpage after punching, the surface is clean, no scratch, no delamination, inclusion, rust spots. Watermark, oxide film in high temperature does not peel off, get the majority of users praise.

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