PCB Stackup
At KKPCB, we are your experts, guiding you through the world of stackup options to ensure your electronic gear is perfectly equipped. Need seamless integration with your design tools? Our impedance models make it easy. Create efficient, impedance-aligned PCB stackups that resist bending and twisting to optimize performance and reliability.

PCB layering or stacking is a way of stacking multiple printed circuit boards together while ensuring that there are predefined interconnections between them, allowing multiple printed circuit boards to be installed in the same device. These multi-layer PCBs can multiply the speed and functionality of a device and are composed of at least three conductive layers, with the bottom layer being composited with an insulating board.

While PCB stacking can bring many benefits, including reducing impedance mismatch and signal crosstalk issues, there are challenges with PCB layer stacking.

Some of the issues with PCB multi-layer stacking can include:

Increased EMI radiation: This occurs if the stackup is not designed properly and there is an impedance mismatch, which creates reflections within the system. Proper stackup design will reduce mismatches and prevent this problem.
Layer skew: If you are experiencing layer skew issues, board side design using heat staking and rivet and dowel methods should prevent such issues in the future.
Stackup measles: If measles occur when stacking boards, add silicon pads with epoxy pads when arranging the boards. This will equalize stress and eliminate measles while keeping the board thickness uniform.
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Other PCB Stackup Considerations
Multilayer PCB stackups should strive to meet the following five goals:

Ground and power planes are tied together as closely as possible
Signal layers are always adjacent to planes
Signal layers are coupled as closely to their planes as possible
High-speed signals are routed through buried layers between planes to control radiation
Multiple ground planes reduce impedance and radiation
Not every PCB stackup needs to meet all of these goals. In fact, you would need an eight-layer board to meet all five goals. However, you should try to achieve as many of these goals as possible in your stackup design and work with your PCB engineering team to determine which of these goals are most important in a board with fewer than eight layers.

KKPCB provides global customers with one-stop services from PCB layout, prototype PCB proofing, PCB manufacturing, PCBA processing (including SMT and DIP), PCBA testing, PCBA product assembly and outbound packaging. You could provide a Gerber file or BOM list to us, we will offer the finished PCB products or PCB assembly which are satisfied with you.