Multi-sided designs printed circuit boards (PCB) can be complicated. The fact that the design even needs to use more than two layers means that the number of circuits required by the circuit board prototyping manufacturer will not be suitable for the top and bottom surfaces. Even when the circuit is suitable for two outer layers without problems, the PCB designer can decide to add power and ground planes internally to correct performance shortcomings. The question is, how do PCB manufacturers balance the layers in the PCB layout?
There are many different factors that can cause the performance of the circuit to be less than optimal, from thermal issues to complex EMI (electromagnetic interference) or ESD (electrostatic discharge) issues that need to be pursued and eliminated. However, for a designer, the first task is to correct electrical problems, and it is also important and can not to be ignored the physical configuration of the circuit board. A flawless circuit board can also be bowed or twisted. Fortunately, circuit board prototyping manufacturers pay attention to PCB physical configuration during the design cycle to minimize headaches after assembly. Layer balance is one of the key aspects of mechanical sound circuit boards.
Balanced stacking means that the layer surface and cross-sectional structure of the printed circuit board are reasonably symmetrical. Its purpose is to eliminate areas that may deform when subjected to stress during processing, especially during the lamination stage. When the PCB is deformed, it is difficult for the circuit board prototyping manufacturer to make it down to a sufficient assembly state. This is particularly suitable for boards assembled on automatic surface mount pick and place lines. In extreme cases, the deformation can even prevent the filled PCBA (printed circuit board assembly) from being installed in the final product.
There are IPC inspection standards, and serious bending or twisting should be prevented. However, if the process of the circuit board proofing manufacturer is not out of control, the root cause of most bows and distortions is design-related. Therefore, it is best to conduct a comprehensive review of the PCB layout first and make the necessary adjustments before proceeding to the first prototype order to prevent bad gains.
XPCB Limited is a manufacturer specializing in the production of high-precision double-sided, multi-sided and impedance, blind buried vias, and thick copper circuit boards. The products cover HDI, thick copper, backplanes, rigid-flex combined, buried capacitance and buried resistance. , Golden Finger and other kinds of circuit boards, which can meet the needs of customers for all kinds of products.