Hello everybody,
Today we talk about F4B (PTFE) high frequency circuit board.
F4B is a series of PTFE based high frequency materials which is brand of China. It has advantages on price and quality in the application of navigation, radar, satellite communication, 4G communications, 5G communications and the like.
The common dielectric constant available are 2.2, 2.55 and 2.65, other value of dielectric constants are 2.17, 2.45, 2.75 and 3.0 etc; Copper weight available are 0.5oz, 1oz and 2oz and 3oz; the thickness of board ranges from 0.17mm to 5.0mm.
| PCB Capability |
| PCB material: | PTFE |
| Designator: | F4B series |
| Dielectric constant: | 2.2, 2.55 and 2.65 |
| | 2.17, 2.45, 2.75 and 3.0 |
| Layer count: | 2 Layer, Multilayer, Hybrid type |
| Copper weight: | 0.5oz, 1oz, 2oz |
| PCB thickness: | 0.17mm, 0.25mm, 0.5mm, 0.8mm, 1.0mm, |
| 1.5mm, 2.0mm, 3.0mm, 4.0mm and 5.0mm, etc. |
| PCB Size: | ≤400mm X 500mm |
| Solder mask: | Green, Black, No colour etc.. |
| Surface finish: | Bare copper, HASL, ENIG etc. |
We can provide you with single sided board, double sided board, multilayer board and hybrid circuit board with FR-4.
The common color of solder mask is green, black and no color used.
The surface finish usually used is bare copper (no finish), HASL and immersion gold.
The basic color of F4B PCB is brown.
Electrical properties of F4B PTFE
| Name | Test condition | Unit | Value |
| Density | Normal state | g/ cm3 | 2.1～2.35 |
| Moisture Absorption | Dip in the distilled water of 20±2℃ for 24 hours | % | ≤0.02 |
| Operating Temperature | High-low temperature chamber | ℃ | -50℃～+260℃ |
| Thermal Conductivity | | W/m/k | 0.8 |
| CTE (typical) | 0～100℃ (εr :2.1~2.3) | ppm/℃ | 25(x) |
| 34(y) |
| 252(z) |
| CTE (typical) | 0～100℃ (εr :2.3~2.9) | ppm/℃ | 14(x) |
| 21(y) |
| 173(z) |
| CTE (typical) | 0～100℃ (εr :2.9~3.5) | ppm/℃ | 12(x) |
| 15(y) |
| 95(z) |
| Shrinkage Factor | 2 hours in boiling water | % | 0.0002 |
| Surface Resistivity | 500V DC | Normal state | M·Ω | ≥1×104 |
| Constant humidity and temperature | ≥1×103 |
| Volume Resistivity | Normal state | MΩ.cm | ≥1×106 |
| Constant humidity and temperature | ≥1×105 |
| Pin Resistance | 500V DC | Normal state | MΩ | ≥1×105 |
| Constant humidity and temperature | ≥1×103 |
| Surface dielectric strength | Normal state | d=1mm(Kv/mm) | ≥1.2 |
| Constant humidity and temperature | ≥1.1 |
| Dielectric Constant | 10GHZ | εr | 2.20,2.55,2.65,3.0,3.5 (±2%) |
| Dissipation Factor | 10GHZ | tgδ | 2.2 | ≤7×10-4 |
| 2.55~2.65 | ≤1×10-3 |
| 3.0~3.5 | ≤1.5×10-3 |
Besides F4B PCB, we also supply high frequency circuit boards based on Rogers material, taconic material and Arlon etc. For example the list below:
Rogers RO4350B, RO4003C, RO3003, RO3006, RO3010, RO3210 etc.
Rogers RT/duroid 5880, RT/duroid 5870, RT/duroid 6002, RT/duroid 6010;
Taconic TLX-8, TLY-5, RF-35TC, TLF-35 etc.
Arlon AD450, AD600 etc.
You’re welcome to contact us for your enquiry. Thank you for your reading.
