| Prototype PCB Supplier | Rigid FR-4 prototype boards | IPC-6012; IPC-A-600 | 2–8 layers | About 0.15–0.20 mm | HASL, lead-free HASL, ENIG | ISO 9001; RoHS compliance | 3–10 working days | Engineering validation, samples, and low-volume designs |
| High-Volume Rigid PCB Supplier | Single- and multilayer FR-4 boards | IPC-6012; IPC-A-600 | 2–16 layers | About 0.10–0.15 mm | OSP, immersion tin, ENIG, lead-free HASL | ISO 9001; ISO 14001; RoHS; REACH documentation | 2–6 weeks | Consumer electronics, industrial controls, and repeat orders |
| HDI PCB Supplier | High-density interconnect boards with microvias | IPC-2221; IPC-6012; IPC-4761 | 4–20 layers | About 0.075–0.10 mm | ENIG, ENEPIG, OSP | ISO 9001; IPC workmanship controls; RoHS | 4–8 weeks | Mobile devices, compact modules, and high-density computing hardware |
| Flexible Circuit Supplier | Polyimide flexible and rigid-flex circuits | IPC-6013; IPC-A-600 | 1–8 conductive layers | About 0.10–0.15 mm | ENIG, immersion tin, OSP | ISO 9001; RoHS; REACH documentation | 3–7 weeks | Wearables, displays, cameras, medical instruments, and moving assemblies |
| Metal-Core PCB Supplier | Aluminum or copper-backed thermal boards | IPC-6012; IPC-2221 | 1–4 layers | About 0.15–0.25 mm | HASL, lead-free HASL, ENIG | ISO 9001; RoHS; thermal-material traceability | 2–5 weeks | LED lighting, power supplies, motor drives, and heat-sensitive applications |
| High-Frequency PCB Supplier | Controlled-impedance RF and microwave boards | IPC-2221; IPC-6012 | 2–12 layers | About 0.10–0.15 mm | ENIG, immersion silver, OSP | ISO 9001; impedance-test reporting; RoHS | 4–8 weeks | Wireless equipment, radar, satellite systems, and test instruments |
| Automotive PCB Supplier | Rigid, HDI, and power-control boards | IPC-6012; IPC-A-600; customer-specific PPAP requirements | 2–18 layers | About 0.10–0.20 mm | ENIG, OSP, lead-free HASL | IATF 16949; ISO 9001; ISO 14001; RoHS | 6–12 weeks after qualification | Vehicle electronics, battery systems, sensors, and control units |
| Aerospace and Defense PCB Supplier | High-reliability rigid, flex, and rigid-flex boards | IPC-6012; IPC-6013; IPC-A-600 Class 3 | 4–30 layers | About 0.075–0.15 mm | ENIG, ENEPIG, immersion silver | AS9100; ISO 9001; IPC Class 3 controls; RoHS where applicable | 8–16 weeks after qualification | Avionics, navigation, communications, and mission-critical systems |
| Power Electronics PCB Supplier | Heavy-copper and high-current rigid boards | IPC-6012; IPC-2221 | 2–12 layers | About 0.20–0.40 mm | HASL, lead-free HASL, ENIG | ISO 9001; RoHS; electrical and thermal test records | 4–9 weeks | Inverters, chargers, industrial power systems, and renewable-energy equipment |
| PCB Assembly Supplier | Turnkey or consignment PCBA production | IPC-A-610; J-STD-001 | Assembly-dependent | Component- and design-dependent | Assembly board finish selected by PCB specification | ISO 9001; IPC-A-610 training; RoHS; ESD controls | 2–8 weeks after material availability | Design-to-production programs requiring sourcing, SMT, testing, and box build |