The 4-Layer PCB Service is a board that is stacked with 4 electrical layers. The copper layers are bonded together by a resin layer (prepreg). PCBs have a history from a simple two-sided process to more than 30 layers, and the specifications are more advanced, so the 4 or 6 layer is cheaper and cheaper. Therefore, the design of 4 or 6 layers is the mainstream of the market.
1, 4-38 layers
2, Board finished thickness: 0.3mm-7.0mm
3, Material: FR-4, CEM-1, CEM-3, High TG, FR4 halogen Free, Rogers, Telfon.
4, Max. Finished board size: 23*25(580*900mm)
5, Min. Drilled hole size: 6mil(0.15mm)
6, Min. Line width: 3mil(0.075mm), Min. Line spacing: 3mil(0.075mm)
7, Surface finish/treatment: HASL/HASL lead free, Chemical tin, ENIG,Immersion Silver, OSP, etc.
8, Copper thickness: 0.5-20 oz
9, Solder mask color: Green/yellow/black/white/red/blue
10, Copper thickness in hole: >25.0 um(>1mil)
Copper: The basic material of the electrical diagram.
Core: The frame of the circuit, covered with copper on both sides, for making internal two-sided.
Prepreg: Multilayer boards are an integral part of bonding and insulation.
Solder mask: soldering prevention, insulation, anti-corrosion, etc.
Surface treatment materials: immersion tin, immersion gold, silver. OSP, etc.
4-Layer PCB Service is designed for multi-layer circuits. Multilayer printed circuit boards are of the best value when ordering 4-layer PCB boards, with lower cost and quantity discounts per square inch.
A multilayer PCB consists of three or more circuit layers bonded together by the thickness of an insulating material called a prepreg and a core. Multilayer printed circuit boards are the most complex than other printed circuit boards and are often considered the most complex PCB products due to their construction methods and design complexity.