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.