Selecting the Right CCL

Choosing CCLs depends on PCB electrical, thermal, and mechanical requirements:

• Electrical: Dielectric constant, loss tangent, leakage current, and breakdown voltage are primary considerations for digital and RF boards.
• Physical: Thickness consistency, dimensional stability, glass transition temperature, and drillability affect manufacturability.
• Mechanical: Strength, modulus, ductility, and peel adhesion must withstand PCB assembly and service loads.
• Chemical: Flame retardance, solvent resistance, and moisture absorption determine PCB reliability in different operating environments.
• Thermal: Maximum operating temperature, thermal conductivity, and CTE compatibility with copper prevent failure from overheating.