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A 4-layer PCB is a type of multilayer printed circuit board that consists of four conductive copper layers laminated together with insulating material (typically FR-4). These layers are interconnected through vias (plated holes) to form a complete circuit.
A standard 4-layer PCB stack-up usually includes:
Item | Specification |
---|---|
Layers | 1~64 |
Board thickness | 0.1mm-10.0mm |
Material | FR-4,CEM-1/CEM-3,PI,High Tg,Rogers |
Max panel size | 32"×48"(800mm×1200mm) |
Min hole size | 0.075mm |
Min line width | 3mil(0.075mm) |
Surface finish | OSP,HASL,Imm Gold/Nickel/Ag, Electric gold |
Copper thickness | 0.5-15 OZ |
Soldermask | Green/Yellow/Black/White/Red/Blue |
Silkscreen | Red/Yellow/Black/White |
Min PAD | 5mil(0.13mm) |
Inter package | Vacuum |
Outer package | Carton |
Outline tolerance | ±0.75mm |
Hole tolerance | PTH:±0.05 NPTH:±0.025 |
Certificate | UL,ISO 9001,ISO14001,IATF16949 |
Special request | Blind hole+Gold finger + BGA |
Material Suppilers | Shengyi, KB, Nanya, ITEQ,etc. |