15 Years 4 LAYER PCB LAYOUT
4 LAYER PRINTED CIRCUIT BOARD
PCB stands for printed circuit board, 4 Layer PCB. which consists of four layers of glass fiber. There are four levels of wiring: the top layer, the bottom layer, VCC, and GND. Through holes, buried holes, and blind holes are typically utilized to link the layers. More blind and buried holes exist than double-sided boards. Additionally, avoid running signal tracks on the VCC and GND layers.
4 Layer PCB Design Tips
Uniform Spacing:
The greatest advantage is the distance between the power supply. and the ground is relatively small. which can significantly lower the impedance of the power supply. and increase the power supply’s stability. Due to the great distance between the signal layer and the reference plane. the region of signal return is expanded, and EMI is significant.
Non-Uniform Spacing:
The design of non-uniform spacing controls impedance more effectively. Signals near the reference plane also improve signal quality. and reduce electromagnetic interference (EMI). The drawback is that the distance between the power supply .and the ground is too great. which may decrease the coupling between the power supply . and the ground and raise the impedance. however, this disadvantage can be mitigated by increasing the bypass capacitance.
4 Layer PCB Stackup
The stacking mode for a standard 4-layer PCB stack is as follows. The switching between GND and VCC depends on the signal density of the layer.
Outer layer. These are the uppermost and lowest strata. And used for signal routing.
Inner layer. These innermost two layers are intermediary layers. And intended to supply both power and ground level.
Light Weight
Durability
Higher Density
Low Cost
Better Heat Transfer
2 Layer vs 4 Layer PCB
Four-layer and two-layer PCBs are the most prevalent in multi-layer processes. It is crucial to understand the distinction between four-layer pcb and double-layer pcb in order to make the best decision for your project. Here are several important considerations.
–Cost
Layer 4 PCBs are more expensive than their Layer 2 counterparts. The increase in the number of layers will result in an increase in the overall price of the board. This is because more resources required and production is more intricate.
–Design
Four-layer PCBs are beneficial for more complicated designs than two-layer PCBs . because there is more area available and included more functionalities.
In addition, the four-layer pcb through-hole is more necessary. Usually utilized to connect layers, making the design more adaptable.
–Functionality
Typically, a four-layer PCB contains more functionality than a two-layer PCB. This is due to the fact that they can handle more sophisticated designs and functions.
The 4-layer PCB may support higher-speed signals as an illustration. Because additional layers allow for faster signal routing.
The additional layers used for routing power and ground planes. allowing the 4-layer circuit board to support more power and ground planes.
Additionally, 4-layer PCBs may accommodate greater wire width and space. Because more layers employed for routing width and space, this is the case. The 4-layer PCB may also accommodate thicker copper plating. This is because the copper thickness can be wired with an increased number of layers.
Each Layer’s Settings as Follows:
- First floor.This is the bottom layer, which is often copper. In addition, it serves as the board’s foundation and supports other levels.
- The second level. This is the stratum of power. In addition, it delivers a steady and clean power supply for all components on the circuit board.
- The third level. This layer is a horizon layer. Similarly, it provides all components on the circuit board with a clean and constant ground source.
- The fourth level. The uppermost stratum. It is useful for signal routing and component connectivity.
Applications of 4 Layer PCB
Audio Equipment
input, output amplifier, balanced amplifier, audio amplifier, preamplifier, power amplifier.
Power Supply
switching regulator, DC/AC converter, SW regulator, etc.Communication electronic equipment: high-frequency amplifiers, filtering appliances, transmitting circuits.Office automation equipment: motor drivers, etc.
Automotive
Rigid PCBs are commonly found in small electronic devices such as cell phones, tablets, cameras, video recorders, and other similar small gadgets on the market today. Because these products are frequently transported or handled, the Rigid PCB’s resistance to shock and vibration is an important feature.
Lamps and Lighting
As advocates of energy-saving lamps, a wide variety of colorful energy-saving LED lamps are popular in the market, and Aluminum PCBs for LED lamps are beginning to be used on a large scale.
4 Layer PCB Price
The cost of a 4-layer printed circuit board that determined by a number of variables, Now listed as below.
–Length of board
First, you should evaluate the circuit board’s dimensions. Due to the various sizes of 4-layer PCBs, the cost of larger 4-layer PCBs will be more expensive.
–Amount of layers
The four-ply board then requires more materials. Consequently, it will be more expensive than the double-sided board.
–Substances utilized
Thirdly, the 4-layer PCB utilizes a range of materials, each of which has a varied cost. Therefore, the pricing range for 4-tier PCBs is between $38 and $100.
–Complexity of four-layer printed circuit board
Moreover, 4-layer PCBs are more complex than double-sided boards. they require more time to develop and build. Consequently, 4-layer PCB is more expensive than double-sided pcb.
–Cutting thickness of copper
In addition, you should be aware that 4-layer PCBs often feature thicker copper than double-sided boards. which is also the reason why 4-layer PCBs are more expensive.
-Surface treatment Additionally, 4-layer PCB provides superior surface treatment compared to double-sided PCB. This is due to the fact that 4-layer PCBs can include additional copper layers. which can give superior surface finish support.