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Key Characteristics & Specifications
- Dielectric Constant (DK): Typically ranges between and, though specialized formulations can go up to. It maintains stable DK values even at high GHz frequencies.
- Loss Tangent: Extremely low, which ensures minimal signal degradation in high-speed or long-distance data transmission paths.
- Dielectric Material: Core substrate is Polytetrafluoroethylene (PTFE) combined with woven fiberglass (F4B) or nano-ceramic films (F4BTM/F4BM series) to improve mechanical strength.
- Thickness Range: Standard available board thicknesses generally range from to.
- Copper Cladding: Available in standard half-ounce, 1-ounce, and 2-ounce weights.
Advantages
- Superior High-Frequency Performance: Outperforms FR-4 in RF, radar, satellite communication, and antenna designs where signal integrity is paramount.
- Cost-Effective RF Solution: Often acts as a highly affordable and reliable domestic Chinese alternative to premium RF materials like Rogers.
- Thermal & Chemical Stability: Highly resistant to chemicals and maintains integrity in harsh operating environments.
Disadvantages & Fabrication Challenges
- Poor Rigidity: Raw PTFE is quite soft. While fiberglass/ceramic filling helps, the board remains less rigid than standard fiberglass.
- Adhesion Difficulties: PTFE has a notoriously low surface energy, making it difficult for copper foil to adhere. Manufacturers must use chemical or plasma etching on the Teflon to roughen the surface and create a strong bond with the copper.
- Dimensional Stability: The coefficient of thermal expansion (CTE) is generally higher than FR-4, which can make multilayer alignments and complex multi-step soldering processes more difficult.
Common Applications
- Antennas (e.g., GPS, Wi-Fi, and radar patches)
- Power amplifiers and splitters
- Aerospace and satellite communication systems
- Automotive collision-avoidance radar sensors
For technical data sheets, stack-up planning, or manufacturing capabilities, you can review detailed specifications and fabrication resources on industry platforms such as iPCB or Bicheng PCB.
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F4B PCB: The Best RF Material for High-Frequency Circuits
HUIHE Circuits
https://www.hhcircuits.com › Posts › Uncategorized
HUIHE Circuits
https://www.hhcircuits.com › Posts › Uncategorized
Jan 30, 2026 — F4B PCB is an excellent choice if you need a material that offers low-loss performance, high thermal stability, and reliability in high- ...Read more
F4B-1/2 Teflon pcb glass fabric copper-clad laminates - iPCB
ipcb.com
https://www.ipcb.com › material
ipcb.com
https://www.ipcb.com › material
It is a kind of laminate of microwave PCB due to its excellent electrical performance and higher mechanical strength.Read more
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What is f4 PCB material?
FR4 is a class of printed circuit board base material made from a flame retardant epoxy resin and glass fabric composite. FR stands for flame retardant and meets the requirements of UL94V-0. FR4 has good adhesion to copper foil and has minimal water absorption, making it very suitable for standard applications.
FR4 Material - Circuit board glossary
Multi Circuit Boards
https://www.multi-circuit-boards.eu › support › fr4-mate...
Multi Circuit Boards
https://www.multi-circuit-boards.eu › support › fr4-mate...
Are all PCBs FR-4?
If you're using printed circuit boards, you can use the standard FR4 boards or you can go with a metal core printed circuit board (MCPCB). Ceramic printed circuit boards are a type of metal core PCB you may prefer.
What is the Difference: Ceramic PCB vs. FR4 vs. MCPCB
Millennium Circuits Limited
https://www.mclpcb.com › blog › ceramic-pcb-vs-fr4-vs...
Millennium Circuits Limited
https://www.mclpcb.com › blog › ceramic-pcb-vs-fr4-vs...
Web results
What's a reliable alternative RF material?--F4B High ...
Bicheng PCB
https://www.bichengpcb.com › blog › what-s-a-reliable-a...
Bicheng PCB
https://www.bichengpcb.com › blog › what-s-a-reliable-a...
F4B (PTFE based) is a reliable alternative RF material for antenna, filter and power amplifier. This is a brand of Chinese material which has advantages in ...Read more
F4B High-frequency Material - Bicheng PCB
bicheng-enterprise.com
https://www.bicheng-enterprise.com › f4b_pcb
bicheng-enterprise.com
https://www.bicheng-enterprise.com › f4b_pcb
F4B PCBs offer low dielectric loss, high thermal stability, and superior chemical resistance, making them suitable for demanding environments. The F4B material ...Read more
F4BM-2 & F4BM Radio frequency PCB material - iPCB
ipcb.com
https://www.ipcb.com › material
ipcb.com
https://www.ipcb.com › material
The main components of F4BM-2 are teflon and glass fiber, which are made by Chinese PCB material manufacturers, so F4BM-2 has a very good cost performance. F4BMÂ ...Read more
What's the advantage of F4B material in PCB?
Quora
1 answer · 5 years ago
Quora
1 answer · 5 years ago
F4B series high frequency material is mainly PTFE glass fiber cloth and ceramic-filled PTFE glass fiber cloth etc.Read more
F4B Metal Base PTFE Laminate: Aluminum & Copper ...
PCBSync
https://pcbsync.com › f4b-metal-base-ptfe-laminate
PCBSync
https://pcbsync.com › f4b-metal-base-ptfe-laminate
F4B metal base PTFE laminate combines PTFE's low-loss RF performance with aluminum or copper heat spreading. Full specs, design rules, and application ...
Teflon F4B PCB
KEY TECHNOLOGY（HK）CO. ，LIMITED
https://www.key-pcba.com › ... › Teflon PCB
KEY TECHNOLOGY（HK）CO. ，LIMITED
https://www.key-pcba.com › ... › Teflon PCB
Teflon pcb. Number of floors: 2. Plate thickness: 0.8 ± 0.1mm. Plate used: teflon,PTFE,f4B. Dielectric constant: 2.65. Dielectric loss factor: 0.0037Read more
F4B High Frequency Printed Circuit Board 1.6mm F4BM265 ...
circuitboardpcbs.com
https://www.circuitboardpcbs.com › sale-14172062-f4b-...
circuitboardpcbs.com
https://www.circuitboardpcbs.com › sale-14172062-f4b-...
F4B series high frequency material is mainly PTFE glass fiber cloth and ceramic-filled PTFE glass fiber cloth etc. It is a series of high frequency materials of ...Read more
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Comprehensive Analysis and Application Guide of F4BM ...
Leadsintec
https://leadsintec.com › Industry News
Leadsintec
https://leadsintec.com › Industry News
Aug 28, 2025 — Essentially, F4BM PCB is a copper-clad laminate made of polytetrafluoroethylene (PTFE) reinforced with glass fabric, belonging to a vital branch ...Read more
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