Multi CB supports you starting immediately in the design phase. We help you to find appropriate substrates, dimensioning the conductor width and spacing, as well as with calculating the impedances.
Our offer for HF circuit boards:
- HF-material (low-loss), e.g. PTFE substrate
- Impedance controlled multilayers
- Sandwich buildup for material combinations
- Microvias strating from 75µm
- Controlled production line / with comprehensive test certificate, as needed
Materials used for HF circuit boards
High-frequency boards, e.g. for wireless applications and data rates in the upper GHz range have special demands on the material used:
- Adapted permittivity
- Low attenuation for efficient signal transmission
- Homogeneous construction with low tolerances in insulation thickness and dielectric constant
For many applications, it is sufficient to use FR4 material with an appropriate layer buildup. In addition, we process high-frequency materials with improved dielectric properties. These have a very low loss factor, a low dielectric constant, and are primarily temperature and frequency independent.
Additional favourable properties are high glass transition temperature, an excellent thermal durability, and very low hydrophilic rate.
We use (among others) Rogers or PTFE materials (for example, Teflon from DuPont) for impedance controlled high frequency circuit boards. Sandwich buildups for material combinations are also possible.
Complete overview of available circuit board materials
Depending on the stock on hand, the materials listed may be replaced by technically equivalent or similar products. For critical tolerances, please discuss your requirements with our engineers.
The impedance defined by the customer is tested by our CAM station engineers on manufacturability. Depending on the layer buildup, the PCB layout and the customer's requested impedances a calculation model is chosen. The result is any required modification of the layer builduo and the necessary adjustments to the relevant conductor geometries.
Please also refer to our pages for impedance control of printed circuit boards.
After the manufacture of high frequency circuit boards, the impedances are checked (with a precision of up to 5%), and the detailed results are recorded exactly in a test protocol.