Price of 4-layer PCB 4-layer PCB manufacturer in China

Price of 4-layer PCB

ALLPCB has many Chinese manufacturers with the cheapest price of $12-60 and 2--3days lead time, some even within 24h for 4-layer PCB prototype. Low volume is $100-300 with 4-5days lead time. Here are some basic quotes for your reference:

Dimension	Quantity	Manufacturers	Price	Lead Time
100x100mm	10PCS	JDB	$43	4~5days
		WMD	$154	6~7days
		FastPrint	$283	7~8days
100x100mm	100PCS	JDB	$281	4~5days
		WMD	$276	8~9days
		FastPrint	$754	10~11days

4-Layer PCB manufacturer

Among all these manufacturers on ALLPCB, JDB is the best choice for cheap price and quick turn. 4-layer prototype can be finished in 4-5 days (even can be as quick as 72h).
Here is the JDB capability for your reference:

Items	Capabilities	Remarks
Number of Layers	1-10 layers	For orders above 10 layers, please contact our sales rep.
Material	FR-4 (King Board)	For Flex, Rigid-flex, Metal-based (Aluminum etc.,), HDI, Halogen-free, High Tg, etc., please contact sales rep.
Maximum PCB Size(Dimension)	500x1100 mm	Any sizes beyond this dimension, please contact us.
Board Size Tolerance(Outline)	±0.2mm/±0.5mm	±0.2mm for CNC routing, and ±0.5mm for V-scoring.
Board Thickness	0.4-2.4mm	0.4, 0.6, 0.8, 1.0, 1.2, 1.6, 2.0, 2.4mm. Please contact us if your board exceeds these.
Board Thickness Tolerance(t≥1.0mm)	±10%	Normally “+ Tolerance” will occur due to PCB processing steps such as electroless copper, solder mask and other types of finish on the surface.
Board Thickness Tolerance(t<1.0mm)	±0.1mm
Min Trace	0.1mm/4mil	Minmanufacturabletrace is 4mil(0.1mm), strongly suggest to design trace above 6mil(0.15mm) to save cost.
Min Spacing	0.1mm/4mil	Min manufacturable spacing is 4mil(0.1mm), strongly suggest to design spacing above 6mil(0.15mm) to save cost.
Outer Layer Copper Thickness	1oz/2oz/3oz(35μm/70μm/105μm)	Also known as copper weight. 35μm=1oz, 70μm=2oz, 105μm=3oz. Please contact us if you need copper weight greater than 3oz.
Inner Layer Copper Thickness	1oz/1.5oz(35μm/50μm)	Inner copper weight as per customer’s request for 4 and 6 layers. Please contact us if you need copper weight greater than 1.5oz.
Drill Sizes (CNC)	0.2-6.3mm	Min drill size is 0.2mm, max drill is 6.3mm. Any holes greater than 6.3mm or smaller than 0.3mm will be subject to extra charges.
Min Width of Annular Ring (Via in Pad)	0.15mm(6mil)	For pads with vias in the middle, Min width for Annular Ring is 0.15mm(6mil).
Finished Hole Diameter (CNC)	0.2mm-6.2mm	The finished hole diameter will be smaller than size of drill bits because of copper plating in the hole barrels

PCB 1-layer PCB fabrication process

Major steps: Board——》Cutting-board——》Cleaning——》Drilling-board——》Cleaning-PTH-panel——》Plating-board——》Cleaning-photolithography-image Transfer-inspection-copper/tin——》Plating-coat——》Removing/etching/tin——》Removing-inspection-board——》Cleaning-solder——》 Mask-exposure/develop/inspection-prepreg-screen-HASL-conformal——》Coating-post——》Soldering——》Cleaning-test-final——》Inspection-packing

What is 4-layer PCB

4-layer PCBs are circuit boards made up of 4 electrical layers superimposed on each other. The copper layers are bonded together by resin layers(prepreg). PCB has the history from simple double sided technics to more than 30 layers, and the specifications are more and more advanced, so the price for 4 or 6 layers are cheaper and cheaper. Therefore, the designing of 4 or 6 layers is the main stream in the market.

Materials for PCB

Copper: basic material for electrical diagrams.
Core: the frame of the circuit with copper covered on both sides for the making of inner double sided.
Prepreg: indispensible part for multi-layer board as adhesion and insulation.
Solder mask: welding preventing, insulation, anti-corrosion, etc.
Legend: for highlight.
Surface finishing material: immersion tin, immersion gold, silver. OSP, etc.

What are the application fields of 4-layer PCB?

Security system, vehicle, telecommunication, industrial control, consumption products, medical, etc.

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