PTFE High-Frequency Sheets Balancing Dielectric Properties and Processing Structure
PTFE substrates used in PCBs typically contain filler or reinforcing systems. Different structures affect electrical, dimensional, and processing performance; therefore, materials should be selected and processes verified based on the specific grade.
PTFE: Materials and Selection Guidelines
This information is based on the manufacturer’s current documentation and the versions confirmed by both parties. The model descriptions do not constitute a commitment regarding real-time inventory or direct substitution; thickness, copper foil, and supply specifications are subject to project confirmation.
Ceramic-Filled PTFE
The Rogers RO3000 series falls into this category. The electrical ratings and structures of different grades must be verified individually.
Glass-Fiber-Reinforced PTFE
The AGC TLX-8 is an example of glass-fiber-reinforced PTFE; when selecting a model, be sure to verify the thickness, copper foil, and dimensional requirements.
Ceramic and Glass Fiber Composite Reinforcement
The RF-35TC, featuring a PTFE, ceramic-filled, and glass-fiber structure, is a viable candidate that meets both RF and thermal management requirements.
When selecting a model, be sure to focus on these three points
Hole Metallization Process
Review the hole wall treatment and plating conditions in accordance with the manufacturer’s processing guidelines; do not simply copy standard FR-4 processes.
Hybrid Laminating and Bonding
Specify the bonding material, substrate thickness, and thermal process, and confirm the feasibility of combining it with other materials.
RF Structural Tolerances
Evaluate the dimensions, thickness, and material parameters of antennas or transmission lines as a whole.
From Candidate Materials to Production Materials
01 · Lock Data Version
Record the complete part number, suffix, original factory data sheet, and design objectives, and list any uncertain parameters as items to be confirmed.
02 · Review of Stacking and Processes
Based on the core board, bonding material, copper foil, circuit patterns, and via structures, confirm the available specifications and manufacturing conditions.
03 · Replace after confirmation
Any changes to materials must be compared against electrical, thermal, mechanical, and documentation requirements; once confirmed by the design team, they must be incorporated into the production documentation.
Submit this information to minimize back-and-forth during the selection process.
- Design Documents
- Gerber or ODB++, drill holes, board dimensions, number of layers, board thickness, and copper thickness.
- Material Specifications
- Complete part numbers and suffixes, manufacturer specifications, lamination, copper foil, and permitted substitution ranges.
- Conditions of Use
- Operating frequency bands or signal requirements, thermal processes, environmental and structural constraints.
- Delivery Requirements
- Quantity, target delivery date, inspection requirements, and required material certificates.
Common Selection Issues
Are all high-frequency boards made of PTFE?
No. There are other resin systems used in high-frequency materials, such as the hydrocarbon/ceramic material in Rogers RO4000.
Can PTFE substrate be bent repeatedly?
Bend resistance cannot be inferred from the resin name alone. The applications and validation criteria for RF laminates differ from those for flexible circuit structures.
How do you compare different PTFE grades?
Align the frequencies and test methods, then compare the electrical, thermal expansion, dimensional, copper foil, and processing requirements.
Review the materials, then proceed with prototyping and production
Shenzhen Jingpeng Electronics | Submit your PTFE material requirements, design documents, and quantities; we will review the material specifications and manufacturing plans.
