The 4 layer print circuit board includes five different thickness: 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.6mm, which is pressed based on the double-sided PCB.
When process the lamination, PP and copper foil will be added on both sides of the double-sided board, and then pressed into a multi-layer board through high temperature and high pressure. In other words, the 4 layers printed circuit board has an inner layer. In terms of the process, some traces will be etched through the inner layer and then pressed together. And the double-sided panel is to directly cut the sent sheet and then drill and make it.
The general layout of each layer of 4-layer PCB is the top layer, bottom layer, and two middle layers. The middle 2 layers are the power layer such as VCC and the ground layer such as GND. The power layer and the ground layer can be isolated in the middle to reduce interference.
AiPCBA offers a full-service turnkey PCB solution from prototype to volume production of PCB manufacturing with 1-40 Layers. We produce a wide variety of PCBs, which can solve your needs for various products from Rigid PCBs to Rigid-flex PCBs. Advanced process technology can be produced in AiPCBA factories, such as HDI, Countersink hole, Resin plug hole, Side plating, etc.
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The layout of 4-layer PCB
1) There are four lines in the 4-Layer PCB which are the top layer, bottom layer, VCC layer, and GND layer. Generally is to use for the through-hole, buried hole, or blind hole to connect each other's layers. In addition, the VCC and GND layer as far as possible do not use the signal line.
2) There are multiple GND on the first middle layer. You can layout a small amount of lines and be careful not to divide the copper. The second layer of VCC in the middle layer has multiple power. You can layout a small amount of lines and be careful not to divide the copper too.
4-layers PCB standard thickness
Standard 4L layer stacking is the most common option for PCB designers. Standard layer stacking is available for most applications.
1) 0.5mm total PCB thickness stack up
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Outer copper thickness |
0.5oz (0.018mm)*2 |
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Prepreg thickness |
0.127mm*2 |
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Inner copper thickness |
35oz (0.035mm)*2 |
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Core thickness |
0.14mm*1 |
2) 0.8mm total PCB thickness stack up
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Outer copper thickness |
0.5oz (0.018mm)*2 |
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Prepreg thickness |
0.157mm*2 |
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Inner copper thickness |
35oz (0.035mm)*2 |
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Core thickness |
0.380mm*1 |
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3) 1.0mm total PCB thickness stack up
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Outer copper thickness |
0.5oz (0.018mm)*2 |
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Prepreg thickness |
0.257mm*2 |
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Inner copper thickness |
35oz (0.035mm)*2 |
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Core thickness |
0.380mm*1 |
4 ) 1.2mm total PCB thickness stack up
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Outer copper thickness |
0.5oz (0.018mm)*2 |
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Prepreg thickness |
0.247mm*2 |
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Inner copper thickness |
35oz (0.035mm)*2 |
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Core thickness |
0.60mm*1 |
5 ) 1.6mm total PCB thickness stack up
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Outer copper thickness |
0.5oz (0.018mm)*2 |
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Prepreg thickness |
0.147mm*2 |
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Inner copper thickness |
35oz (0.035mm)*2 |
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Core thickness |
1.20mm*1 |
The Advantages of 4L PCB
4 layer printed circuit boards has many advantages, such as high assembly density, small size; a shortened connection between electronic components, fast signal transmission speed, convenient circuit layout; good shielding effect, and so on.
1) Small size: The small size makes these PCB very important because the size of the technology is getting smaller and smaller with electrical and electronic devices.
2) Good quality: A key characteristic of this type of PCB is its quality, these 4 layer printed circuit boards are used very well and have no problems throughout their service life.
3) Durability: 4 layer PCB are durable because they can withstand not only enormous weights but also high temperatures. There is always insulation between the different layers in these PCB to provide protection from damage.
4) Flexible design: Larger circuit layout space.
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Get Your 4-Layer PCB from AiPCBA
AiPCBA is a well-known service provider of all types of PCB and Assembly services. We have clients from different industries all over the world. We can provide services from PCB layout to PCB prototyping, volume manufacturing, PCB assembly, and electronic box assembly. Our Printed Circuit Boards are used in robotics, medical, automotive, communications, industrial, and consumer electronics. Well suited to our client’s requirements in terms of cost-effectiveness, quality, delivery, and any other requirements.
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Items |
Manufacturing Capabilities |
Details |
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Number of Layers |
1-40 Layers |
Above 10 layers, please contact us. |
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Material |
FR-4 |
For Aluminum, Flex, Rigid-flex, HDI, please contact us. |
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Max. PCB Size (Dimension) |
500×550mm |
Beyond this dimension, please contact us. |
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Dimension Tolerance (Outline) |
±0.2mm/±0.5mm |
±0.2mm for CNC routing, and ±0.5mm for V-scoring. |
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Board Thickness |
0.2-2.4mm |
Above 2.0mm or below 0.6mm, please contact us. |
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Min. Trace/Spacing |
3.5mil |
Suggest to design trace/spacing above 5mil to save cost. |
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Outer Layer Copper Thickness |
1oz/2oz (35um/75um) |
Greater than 2oz, please contact us. |
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Inner Layer Copper Thickness |
0.5oz/1oz (17μm/35μm) |
Greater than 1oz, please contact us. |
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Drill Hole Size (CNC) |
0.2-6.3mm |
The finished hole diameter will be smaller than size of drill bits because of copper plating in the hole. |
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Min. Via Hole Size |
0.2mm |
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Min. Via Diameter |
0.45mm |
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Lear more AiPCBA PCB Manufacturing Capabilities
All PCBs in AiPCBA are produced based on UL and ISO certification standards. All our normal specification PCBs are strictly obeying to IPC-A-6011/6012 Class 2 latest version and IPC-A-600 Class 2 latest version.
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