non-conductive die attach

**Non-conductive die attach** is the **die bonding approach using electrically insulating adhesives where conduction is not required through the attach layer** - it prioritizes mechanical support and stress management. **What Is Non-conductive die attach?** - **Definition**: Attach materials with low electrical conductivity used for mechanical fixation and thermal coupling. - **Use Cases**: Selected when die backside is electrically isolated or current path is routed elsewhere. - **Material Types**: Includes insulating epoxies and film adhesives with tailored modulus and CTE. - **Design Benefit**: Can reduce risk of unintended electrical coupling at package interface. **Why Non-conductive die attach Matters** - **Isolation Requirement**: Many devices need strict backside electrical insulation for safety and function. - **Stress Engineering**: Insulating systems can be optimized for lower modulus and better strain relief. - **Process Compatibility**: Often fits lower-temperature assembly windows for sensitive components. - **Reliability**: Appropriate formulation helps resist delamination under thermal cycling. - **Manufacturability**: Stable dispense and cure behavior supports repeatable high-volume flow. **How It Is Used in Practice** - **Material Qualification**: Screen dielectric strength, adhesion, and thermal conductivity against package needs. - **Flow Control**: Tune dispense pattern and cure to avoid voids and edge contamination. - **Stress Validation**: Correlate attach modulus and thickness with warpage and reliability data. Non-conductive die attach is **a common attach solution for electrically isolated package architectures** - proper insulating-attach control improves both functional isolation and mechanical robustness.