CLTE Series laminates are engineered for high-frequency applications requiring exceptional electrical performance and dimensional stability. These ceramic-filled PTFE composites are designed to ensure reliable processing in various manufacturing environments. Following the recommended guidelines will optimize yield, maintain product integrity, and ensure long-term reliability.

Key Considerations

• Thermal Management
  CLTE laminates are designed to withstand thermal cycling, but care must be taken during fabrication to prevent localized overheating.
• Handling
  Use proper handling tools to avoid contamination or physical damage to the laminate surface.

Fabrication Guidelines

1. Storage and Handling

• Store laminates flat in a clean, dry environment at temperatures between 20–25°C (68–77°F) with relative humidity below 50%.
• Avoid bending or creasing the laminates to prevent micro-cracking.

2. Drilling

• Use carbide or diamond-coated drill bits to achieve high-quality vias.
• Backer and entry materials should match the hardness of the laminate to minimize burring.
• Suggested drill speeds:
  • Entry Speed: 150–180 surface feet per minute (SFM).
  • Retract Speed: 350–400 SFM.
• Perform deburring carefully to avoid layer separation or material distortion.

3. Lamination

• Precondition the material at 150°C (302°F) for 30–60 minutes to remove residual moisture.
• Recommended press cycle:
  • Temperature: 200–220°C (392–428°F).
  • Pressure: 200–300 psi.
  • Time: Hold at temperature for 30–60 minutes.
• Cool under pressure to avoid void formation or material warpage.

4. Etching

• CLTE laminates are compatible with conventional copper etching solutions.
• Use controlled parameters to avoid undercutting or uneven etching.

5. Plating

• Ensure surfaces are clean and free of contamination before applying electroless or electrolytic plating.
• Standard plating techniques for copper and other metals are suitable for CLTE laminates.

6. Routing and Cutting

• CNC routers with sharp carbide or diamond-coated bits are recommended.
• Laser cutting can be used for