Fluororesin FPC
FLUOROCUIT™
Flexible circuit board superior
in a high-speed transmission performance
FLUOROCUIT™
Sumitomo Electric Industries’ FLUOROCUIT™ is a flexible circuit board (FPC) of the Fluororesin that a low transmission loss in the millimeter wave band and flexible which utilization is expected of the by 5G communication. Fluororesin has gained popularity have an extremely superior characteristic as a circuit board material in a high-frequency band. Sumitomo Electric Industries group has created various products and work on Fluororesin manufacturing for a long time. In making use of the accumulated knowledge and processing technique, we realized the mass production of the fluororesin flexible circuit board which it had been said to that processing was difficult until now. Also, it’s suitable for the utilized in the cable part that flexibility is needed because feature of FPC is superior flexibility.
Reasons to choose FLUOROCUIT™,
low transmission loss FPC
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- Low transmission loss
- We process low-dielectric fluororesin substrates into FPCs to create wiring materials that are ideal for high-frequency transmission. We have a lot of experience in evaluating transmission characteristics.
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- Thin and narrow pitch
- Performance, thinness and narrow pitch are combined. It contributes to air flow and high density in the chassis.
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- Excellent gain as an antenna
- By drawing the antenna circuit on the fluororesin FPC, it can be used as an antenna with space efficiency and excellent gain.
Low transmission loss
By using low dielectric constant/low dielectric loss tangent fluororesin materials, we can achieve low transmission loss FPCs at high frequencies.
In the frequency band of 5G millimeter wave and automotive radar, comparing the insertion loss with FPCs using other companies' materials, the transmission loss of our FLUOROCUIT™ (fluoropolymer FPC) is reduced.
Spec comparison of each FPC base material
Material Property
| LCP | PPE | Fluoro resin (Competitor) |
Fluoro resin (Sumitomo) |
|
|---|---|---|---|---|
| DK | 3.2 | 3.6 | 3.0 | 2.35 |
| DF | 0.002 | 0.005 | 0.001 | 0.002 |
@10GHz, tested by Cylinder cavity
The use of fluororesin as a dielectric reduces high-frequency loss, which is easily attenuated and diffused during transmission.
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Thin and narrow pitch
The thickness of the 3-layer FPC is 300-400um. If multiple coaxial cables are replaced with FPC, they can be combined into 1pcs.
In terms of space, it`s about 80% thinner and 20% narrower in pitch than AWG34 coaxial cable.
FPC Thickness
300～400um
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- Reduce space of interconnect material
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Replace bundled cables with one FPC for saving space and easy handling
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- Compare with other wiring material
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※ This comparison is for reference only
Excellent gains
as an antenna
A fluororesin substrate and a liquid crystal polymer (LCP) substrate were made with almost the same dimensions, and a 2×2 antenna array was formed. When the antenna characteristics were measured using the general relative gain measurement method (only the patch size was fine-tuned to match the dielectric constant), it was found that the antenna performance was 1.5 times higher than that of the liquid crystal polymer (LCP).
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Application examples
1. RF module connectionHigh frequency RF signal relay from modem of the mainboard to antenna module
High frequency RF signal relay from modem of the mainboard to antenna module
- Application example
- Smartphone
- Router
- PC
- Base station device
2. External port connectionRelay of high-speed transmission signal between main-board and sub-board due to speeding up external terminal signal
Relay of high-speed transmission signal between main-boad and sub-boad due to speeding up external terminal signal
- Application example
- PC
- Data center device
- Base station device
3. FPC antennaConvert the antenna layer to fluorine FPC that low loss and antenna gain are required to improve antenna performance.
Convert the antenna layer to fluorine FPC that low loss and antenna gain are required to improve antenna performance.
- Application example
- Base station device
- Automotive radar
Sample
