6 Layer Multilayer Printed Circuit Board Fabrication

A 6-layer multilayer printed circuit board consists of six layers of conductive material. It consists of a four-layer pcb and two planes between two additional signal layers. A typical 6-layer multilayer printed circuit board consists of two inner layers, two outer layers and two inner layers, one for power and one for ground. Such a design can improve electromagnetic interference and provide better routing for low-speed and high-speed signals. A two-layer surface layer facilitates the transmission of low-speed signals, while two inner layers facilitate high-speed signals.

6-layer Multilayer Printed Circuit Board Design

First of all, before designing, we need to analyze and solve the number of ground, power and signal planes that a 6-layer multilayer printed circuit board may need. Bonding layers are an important part of any laminate as they provide better shielding to the laminate and they reduce the need for external shielding cans.

Multilayer printed circuit boards have been a staple in the design world for decades. As electronic components shrink, allowing more circuits to be designed on a single board, their functionality increases the need for new PCB design and manufacturing techniques to support them. Sometimes a 6-layer multilayer printed circuit board stackup is just a way to get more traces on the board than a 2-layer or 4-layer board would allow. Creating the correct layer configuration to maximize circuit performance in a 6-layer multilayer printed circuit board stackup is now more important than ever. Here are some proven 6-layer multilayer printed circuit board stackup designs for various applications:

● For dense boards with a small footprint: If you plan to route a dense board with a small footprint, a 6-layer multilayer printed circuit board can accommodate four signal planes, one ground plane and one power plane.

●For denser 6-layer multilayer printed circuit boards that will use a mix of wireless/analog signals: On this type of board, we can choose a stackup that looks like this: Signal layer/Ground/Power layer/Ground/Signal layer/ground layer. In this type of stackup, the inner and outer signal layers are separated by the ground planes of the two packages. The stackup design of this 6-layer multilayer printed circuit board helps to suppress EMI mixing with internal signal layers. The stack design is also ideal for RF equipment because the AC power and ground planes provide excellent decoupling.

● For 6-layer multilayer printed circuit boards with sensitive traces: If you want to build a 6-layer multilayer printed circuit board with many sensitive traces, it is better to choose a stack that looks like this: signal layer/power layer/2 signal layer/ground/signal layer. This stack will provide excellent protection for sensitive traces. This stack is suitable for circuits utilizing high-frequency analog signals or high-speed digital signals. These signals will be isolated from the lower speed signals on the outer layer. This shielding is done by inner layers, which also allow routing of signals with different frequencies or different switching speeds.

● For a 6-layer multilayer printed circuit board that will be deployed near strong radiation sources: For this type of board, a stack-up of ground/signal layer/power/ground/signal layer/ground would be perfect. This stack can effectively suppress EMI. This stackup is also suitable for boards used in noisy environments.

Advantages of 6-layer Multilayer Printed Circuit Board

Due to the 6-layer multilayer printed circuit board design, they have become a regular feature in several advanced electronic circuits. The advantages of 6-layer multilayer printed circuit board are as follows:

● Small footprint: Due to the multilayer design of 6-layer multilayer printed circuit board, these PCBs are smaller than other circuit boards, which is especially beneficial for miniature devices.

● Quality-driven design: 6-layer multilayer printed circuit board stackup design requires more planning. This helps reduce errors in detail, thus maintaining a high-quality build. Today, most multilayer printed circuit board manufacturers are employing various testing and inspection techniques to ensure the suitability of these boards.

● Compact structure: Compact multilayer printed circuit board is achieved by using lightweight components, which helps to reduce the overall weight of the PCB. Unlike single-layer or double-layer PCBs, 6-layer multilayer printed circuit boards do not require multiple connectors to interconnect components.

● Improved durability: 6-layer multilayer printed circuit board uses multiple insulating layers between circuits, and these layers are bonded using protective materials and different prepreg adhesives. This helps increase the durability of these multilayer printed circuit boards.

● Excellent electrical performance: The 6-layer multilayer printed circuit board has excellent electrical performance, which ensures high speed and high capacity in a compact design.

6 Layer Multilayer Printed Circuit Board Price

The price of a 6-layer multilayer printed circuit board prototype is generally engineering fee + board fee + testing fee, impedance, half-hole, and wrapping can all be produced, and additional special process costs are required. Impedance and blind buried holes can be made, and the process can also be selected in multiple ways. For details, please refer to the multilayer printed circuit board documents.

1. BGA

The 6-layer multilayer printed circuit board has BGA on the surface, and the cost will increase relatively. Some 6-layer multilayer printed circuit board manufacturers use BGA for additional calculation.

2. Pressing

The 6-layer multilayer printed circuit board will increase the cost for every 1 more PP than the conventional laminated structure. In addition, TG150 and above, TG increases, PP will be charged. The cost of lamination increases when the plate thickness is 2.0MM, and how much is added for every 0.4MM increase in plate thickness. For every additional bare panel, the project fee and panel unit price will be charged according to the additional 2 layers.

3. Order quantity and delivery date

(1) The fewer the number of multilayer printed circuit boards, the more expensive they are. The engineering department needs to prepare materials, produce films, test and inspect, pack and ship according to the normal process.

(2) Delivery date: 6-layer multilayer printed circuit board manufacturing is a delicate job that takes time to run the process, and each item of work cannot be omitted. If the delivery time is short, workers need to be rotated, which will increase the labor cost accordingly, so the price will also increase.

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