PCA64110-NFC antenna thickness questions

RE: PCA64110-NFC antenna thickness questions

JONATHAN LL — Thu, 04 Sep 2025 11:30:58 GMT

[quote user="MatthewKYEO"]Q) is this the total flex PCB thickness without the gold fingers and coverlays?[/quote]

H is for the connector that we use on the PCB.

[quote user="MatthewKYEO"]Or was that the thickness of the gold fingers?[/quote]

The total thickness is 0.3mm approximately at the stiffener, and that is with the finger as well, measured 0.31mm with a caliper.

On the mechanical layer 4 in the files you can see that it says 0.3mm.

For the thickness of just the flex it is about 0.22mm, if measuring just the edge of the flex plastic then i would get 0.17mm and for the area with the traces and via i get about 0.26mm.

[quote user="MatthewKYEO"]Q) Was polyimide (PI) material selected for the coverlay?[/quote]

Not sure what is used, but you should be able to pick among a wide range of materials as this will not effect the RF performance here since the NFC operates at 13.56 MHz.

So you can work together with your manufacturer to find what best fits your use case. The main criteria here is to make sure that it fits well with the connector you use.

Regards,
Jonathan

RE: PCA64110-NFC antenna thickness questions

Matthew K — Thu, 04 Sep 2025 09:10:08 GMT

Thank you Jonathan!

About H=1.2mm

Q) is this the total flex PCB thickness without the gold fingers and coverlays?

Or was that the thickness of the gold fingers?

Q) Was polyimide (PI) material selected for the coverlay?

RE: PCA64110-NFC antenna thickness questions

JONATHAN LL — Wed, 03 Sep 2025 13:37:12 GMT

Adding some extra details:
The stiffener used for the contact point is 0.3mm.

RE: PCA64110-NFC antenna thickness questions

JONATHAN LL — Wed, 03 Sep 2025 13:26:59 GMT

You can get all the details for the NFC antenna if yo download any of our DK hardware files, it follows.

Adding it here as well: devzone.nordicsemi.com/.../8726.PCA64110_2D00_NFC-Antenna-Flexprint-1_5F00_0_5F00_0.zip

[quote user=""] Is this flex antenna using "Gold Fingers"?[/quote]

Yes, we use a 0.5mm FPC, 5P,Right Angle SMT,Double Contact,H=1.2mm,White, Tin plated connector for this.

FPC_05P-0.5mm-RA-SMD, Manufacturer: W-CON, Manufacturer Part Number: 5141-05RZDNWR01

[quote user=""]Q) What is the Coverlay Thickness? I see the Coverlay region near the connector side[/quote]

Looks like we have on top and bottom side here, but i cant find a number. Will check internally to see if I have more specifics.

Regards,
Jonathan