6 Layer PCB Stackup with Impedance Control

A 6-layer PCB provides additional routing layers for higher-density circuit designs, better ground and power plane separation, and improved EMI shielding. This makes it ideal for high-speed digital, RF, and mixed-signal applications where signal integrity, noise isolation, and compact layouts are more demanding than what a 4-layer board can adequately accommodate.

FR4 is the most common base material for 6-layer impedance-controlled PCBs, offering consistent dielectric constants for predictable trace impedance. For more demanding high-frequency applications, Rogers materials such as RO4003C or RO4350B are used, providing lower dielectric loss, more stable Dk values, and superior signal performance across wide temperature ranges.

SFX PCB offers 6-layer boards with copper weights ranging from 0.5 oz to 10 oz per layer. Standard 0.5–1 oz copper is typically used for signal layers in impedance-controlled designs, while heavier copper options of 2–10 oz are available for power layers or applications requiring high current capacity alongside controlled impedance routing.

Yes. SFX PCB's 6-layer PCBs fully support blind vias, which connect an outer layer to an inner layer without passing through the entire board, and buried vias, which connect only inner layers. These via types enable greater routing density and miniaturization, essential for compact high-density interconnect designs in consumer, medical, and industrial electronics.

SFX PCB offers multiple surface finish options including HASL, lead-free HASL, ENIG (Electroless Nickel Immersion Gold), OSP, Immersion Silver, and Immersion Tin. ENIG is widely preferred for impedance-controlled boards due to its flat surface, excellent solderability, and compatibility with fine-pitch components and high-frequency signal paths.

6-layer PCBs with impedance control are used in high-speed digital circuits, RF and microwave equipment, telecommunications infrastructure, medical imaging devices, industrial control systems, and automotive electronics. Any application requiring reliable high-frequency signal transmission, dense routing, and controlled electromagnetic interference benefits from this board configuration.