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|Base Material:||RO4350B+FR-4||Layer Count:||4 Layers|
|PCB Thickness:||0.7mm||Solder Mask:||Green|
|Silkscreen:||White||Copper Weight:||Inner Layer Is 0.5 Ounces And The Outer Layer Is 1 Ounce.|
|Surface Finish:||Immersion Gold|
RO4350B FR4 4 Layer Circuit Board,
0.7mm 4 Layer Circuit Board,
RO4350B FR4 Diy 4 Layer PCB
4 Layer Hybrid PCB Board Built On Rogers 10mil RO4350B and FR-4
(PCB’s are custom-made products, the picture and parameters shown are just for reference)
Today, we're talking about 4-layer high frequency PCB made on 10mil RO4350B pressed with FR-4.
The board is designed as a 4-layer structure, because 4-layer is relatively simple and cost controllable, this is helpful to open up a new market.
Let's take a look at first build-up,
The first layer to the second layer is 10mil RO4350B core material, the core has fixed thickness which is very important to the electrical length of RF lines on the circuit board, and the other layers are FR-4 materials, which are bonded by semi-cured sheets. Inner layer is 0.5 ounces and the outer layer is 1 ounce.
Following picture is the cross section
Plated through holes connect each layer. Pads and vias are with immersion gold.
The second board has a special “hole” in the board. See the build-up first.
Layer 1 and layer 2 is the 10mil core. The depth-control drill is dented on FR-4 side. The whole height of this board is only 0.7mm thick.
The applications of 10mil RO4350B hybrid PCB are wide, such as preamplifier, radar sensors, digital transmitter and splitter module; GPS antenna, communications relays, analogue transmitter and 4G antennas; RF transmitter, WiFi amplifier, RFID and attenuator etc.
The advantages of 10mil RO4350B hybrid PCBs are reflected in following points.
1) RO4350B exhibits a stable dielectric constant over a broad frequency range. This makes it an ideal substrate for broadband applications;
2) Signal integrity performance improved over the stack-ups with all FR4 board;
3) Cost reduced over stack-ups with all low loss material;
4) Benefit from our strong capabilities: meeting your PCB needs from prototype to mass production and IATF 16949 (2016), ISO14001 (2015), ISO9001 (2015) and UL certified factory guarantee your quality.
Thank you for your reading. You’re welcome to contact us for our RF PCB enquiries.
Appendix: Our PCB Capability 2021
|Substrate Material||FR-4(including High Tg 170, High CTI>600V); Aluminum based; Copper based; Rogers RO4350B, RO4003C, RO3003, RO3006, RO3010, RO3210 etc.; Rogers RT/duroid 5880, RT/duroid 5870, RT/duroid 6002, RT/duroid 6010 etc..; Taconic TLX-8, TLY-5, RF-35TC, TLF-35 etc..; Arlon AD450, AD600 etc; PTFE F4B DK2.2, DK2.65 etc..; Polyimide and PET.|
|Maximum Size||Flying test: 900*600mm, Fixture test 460*380mm, No test 1100*600mm|
|Board Outline Tolerance||±0.0059" (0.15mm)|
|PCB Thickness||0.0157" - 0.3937" (0.40mm--10.00mm)|
|Insulation Layer Thickness||0.00295" - 0.1969" (0.075mm--5.00mm)|
|Minimum Track||0.003" (0.075mm)|
|Minimum Space||0.003" (0.075mm)|
|Outer Copper Thickness||35µm--420µm (1oz-12oz)|
|Inner Copper Thickness||17µm--350µm (0.5oz - 10oz)|
|Drill Hole(Mechanical)||0.0059" - 0.25" (0.15mm--6.35mm)|
|Finished Hole(Mechanical)||0.0039"-0.248" (0.10mm--6.30mm)|
|Registration (Mechanical)||0.00197" (0.05mm)|
|Solder Mask Type||LPI|
|Min Soldermask Bridge||0.00315" (0.08mm)|
|Min Soldermask Clearance||0.00197" (0.05mm)|
|Plug via Diameter||0.0098" - 0.0236" (0.25mm--0.60mm)|
|Impedance Control Tolerance||±10%|
|Surface Finish||HASL,HASL LF,ENIG,Imm Tin,Imm Ag, OSP, Gold Finger|