Stamped Lead Frames

Impact: Non-flat leadframes cause die attach failure, wire bonding misalignment, and package warpage during molding. Even sub-micron variance across the strip can render hundreds of IC packages defective.

Solution: Precision-guided stripper plates with micro-adjustable die clearance. In-die coining stations that stress-relieve the strip before final blanking. Continuous laser flatness measurement at 100% inspection rate across the full strip.

Impact: Burrs exceeding 10 microns disrupt wire bonding, create unintended short circuits, and contaminate cleanroom assembly environments. A single burr can cause cascade failure across the entire production lot.

Solution: Ultra-fine-grain tungsten carbide tooling with polished cutting edges maintained to sub-micron sharpness. Progressive die stations with dedicated burr-suppression geometry at each cutting operation. In-die vision cameras positioned after every forming station.

Impact: Stressed edges lead to lead bending during trim/form operations and latent field failures under thermal cycling. Micro-cracks propagate over time, causing intermittent connectivity failures that are nearly impossible to detect in post-production testing.

Solution: Optimized punch-to-die clearance ratios calibrated to each material thickness. Radius-controlled cutting edges with multi-stage shaving stations that progressively refine the sheared surface. Stress-relief annealing integrated into the progressive die sequence.