gang bonding

**Gang bonding** is the **simultaneous bonding of multiple interconnect points in a single press operation rather than sequential single-point attachment** - it improves throughput for dense fine-pitch interconnect arrays. **What Is Gang bonding?** - **Definition**: Batch-style bond process where many pads are joined at once with one aligned tool action. - **Process Context**: Common in ACF/NCF attach and flexible-circuit interface assembly. - **Tooling Need**: Requires high-planarity bond head and accurate global alignment. - **Uniformity Challenge**: Pressure and temperature must be distributed evenly across all points. **Why Gang bonding Matters** - **Throughput Benefit**: Parallel bonding reduces cycle time versus point-by-point methods. - **Fine-Pitch Scalability**: Efficiently supports high channel-count interconnect structures. - **Process Consistency**: Single-shot bonding can reduce variation between adjacent joints. - **Yield Sensitivity**: Any global misalignment or non-uniform force can affect many joints simultaneously. - **Cost Impact**: High productivity gains are significant in volume manufacturing. **How It Is Used in Practice** - **Alignment Optimization**: Use fiducial-based closed-loop positioning before bond press. - **Uniformity Calibration**: Map tool pressure and temperature across full bond area regularly. - **Array-Level Testing**: Verify contact resistance and open/short distribution across full joint set. Gang bonding is **a high-throughput bonding strategy for multi-point interconnects** - gang-bond success depends on uniformity and alignment excellence.