Mixed PCB | Hybrid PCB
The hybrid PCB can be a mixture of FR-4 and high frequency material as abovementioned, another type is a mixture of high frequency material with different dielectric constant (DK), for example RT/duroid 5880 and RO4350B etc.
Stack-up: RO4350B+FR4
| --- ---------- Layer 1 (Top layer) 0.5oz+plating
| Pre-Preg 10mil RO4350B
| ---------- Layer 2 (mid. layer 1) 0.5oz
1.6 mm +/-10% Core FR-4
| ---------- Layer 3 (mid. layer 2) 0.5OZ
| Pre-Preg 20mil RO4350B
| --- ---------- Layer 4 (Bottom layer) 0.5oz+plating
Why do we use hybrid PCB?
There're 3 main reasons that convince us to use this type of high frequency multilayer PCB, i.e. cost, reliability improved and electrical properties enhanced.
The cost of high frequency material is much higher than FR-4, sometimes, when using hybrid of FR-4 and high frequency material can solve the cost problem.
It causes reliability problems when the CTE value of the PCB material used is relatively high, while some high frequency materials have high CTE characteristics. When a low CTE FR-4 material is combined with a high CTE material to make a multilayer board, the composite CTE is acceptable, thus enhancing reliability.
Most of the time, some lines of the mixed PCB board require very high electrical performance, some do not require high, in this case, the parts with low electrical performance requirements will be used FR4, while the parts with high electrical performance requirements will use more expensive high frequency materials. Some using different DK of material to make mixed PCB, it is also to improve electrical properties, such as in some applications of combiners and filters, using different values of DK material.
| Our PCB Capability | |
| PCB Type: | Hybrid PCB, Mixed PCB |
| Mixed type: | RO4350B + FR4; |
| | RO4003C + FR4; |
| | F4B + FR4; |
| | RT/duroid5880 + FR4; |
| | RT/duroid5880 + RO4350B |
| Solder mask: | Green, Red, Blue, Black, Yellow |
| Layer count: | 4 Layer, 6 Layer, Multilayer |
| Copper weight: | 0.5oz (17 µm), 1oz (35µm), 2oz (70µm) |
| PCB thickness: | 1.0-5.0mm |
| PCB size: | ≤400mm X 500mm |
| Surface finish: | Bare copper, HASL, ENIG, Immersion tin, OSP |
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Thank you for your reading and you're welcome to contact us for your PCB enquiries.
Ivy Deng | Business development
Bicheng PCB | sales10@bichengpcb.com |Material partners: Rogers, ITEQ, SHENGYI, TAIYO, KUANGSHUN
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Bicheng is located at Baoan, Shenzhen, China 518103.
