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# PCB technologies
Compare rigid, multilayer, HDI, flexible, rigid-flex, metal-core, high-frequency and heavy-copper PCB manufacturing requirements.
[Discuss your requirements ↗](https://www.chinasuqi.com/en/request-a-quote/)
## Start with the construction
Board technology is a starting point for defining the build. Electrical performance, mechanical space, thermal requirements and interconnection density inform the structure and material system.
## Review the conditions together
A minimum feature size does not apply automatically to every copper weight or board thickness. Use the technical pages to identify the information needed for an engineering review.
## Compare PCB technologies by design requirement
Select a construction against the problem the design must solve. Several requirements can coexist: a multilayer board may also need impedance control or heavier copper.
| Design requirement | Technology to investigate | Key input |
| --- | --- | --- |
| Stable rigid construction | Rigid / multilayer | Layer order and mechanical constraints. |
| Dense interconnection | HDI | Buildup structure and via map. |
| Compact three-dimensional routing | Flex / rigid-flex | Installed geometry and bend requirements. |
| RF transmission | High-frequency / impedance control | Material grade and electrical targets. |
| Thermal integration | Metal core | Dielectric, base metal and mounting. |
| Power distribution | Heavy copper | Finished copper and conductor geometry. |
CONTINUE YOUR REVIEW
## Related manufacturing resources
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### [Rigid PCB fabrication ↗](https://www.chinasuqi.com/en/pcb-technologies/rigid/)
Rigid boards provide a fixed mechanical platform for circuit interconnections. Define board thickness, copper distribution, drilled features and outline tolerances as part of the manufacturing package.
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### [Multilayer PCB fabrication ↗](https://www.chinasuqi.com/en/pcb-technologies/multilayer/)
A multilayer board combines multiple copper layers in a defined stackup. Layer order, dielectric thickness, copper weights and material selection should be confirmed before fabrication.
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### [HDI PCB fabrication ↗](https://www.chinasuqi.com/en/pcb-technologies/hdi/)
HDI fabrication supports high-density interconnections using fine circuit features and defined via structures. The buildup sequence and layer spans are essential manufacturing inputs.
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### [Flexible PCB fabrication ↗](https://www.chinasuqi.com/en/pcb-technologies/flexible/)
Flexible circuits connect electrical requirements with a bendable structure. Define the flex material, construction, coverlay and any local reinforcement needed by the design.
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### [Rigid-flex PCB fabrication ↗](https://www.chinasuqi.com/en/pcb-technologies/rigid-flex/)
Rigid-flex boards integrate rigid sections with flexible interconnections. Fabrication requires a clear definition of each region and how the layer structure transitions between them.
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### [Metal-core PCB fabrication ↗](https://www.chinasuqi.com/en/pcb-technologies/metal-core/)
Metal-core PCB construction combines circuit layers with a metal base and an insulating system. Define the thermal, electrical and mechanical requirements together.
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### [High-frequency PCB fabrication ↗](https://www.chinasuqi.com/en/pcb-technologies/high-frequency/)
High-frequency PCB projects depend on the specified material system and electrical targets. Submit laminate requirements, stackup and any impedance requirements for review.
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### [Heavy-copper PCB fabrication ↗](https://www.chinasuqi.com/en/pcb-technologies/heavy-copper/)
Heavy-copper designs require copper thickness, circuit geometry and thermal requirements to be reviewed together. State the finished copper requirements separately for inner and outer layers.
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### [Controlled Impedance PCB Fabrication ↗](https://www.chinasuqi.com/en/pcb-technologies/controlled-impedance/)
Prepare controlled impedance PCB requirements: target values, single-ended or differential structures, reference layers, stackup and TDR verification.
YOUR NEXT PCB PROJECT
## Let’s define your next build.
Start with your files, requirements and target date.
[Prepare a PCB inquiry ↗](https://www.chinasuqi.com/en/request-a-quote/)

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