In the current multilayer circuit board manufacturing process, the interlayer conduction function is achieved by metallized holes. After some processes, the interlayer conduction is finally realized. In fact, the multilayer PCBA circuit board is over Two layers, for example, four layers, six layers, eight layers, etc. Of course, some designs are three-layer or five-layer lines, also called multi-layer PCBA circuit boards. The following small series gives you an introduction to the advantages of multi-layer PCBA circuit boards.
The advantages of using multi-layer PCBA circuit boards are: high assembly density, small size: shortened connection between electronic components, and improved signal transmission speed: convenient wiring: for high-frequency circuits, adding a bottom layer to form signal lines to ground Constant low impedance: good shielding effect. However, the higher the number of layers, the higher the cost, the longer the processing cycle, and the more troublesome quality inspection.
With the continuous development of electronic technology, especially for large-scale integrated circuits, multi-layer PCBA circuit boards are rapidly developing into high-density, high-precision, and advanced digital directions. Micro-wire, small aperture through, blind hole buried hole high plate thickness and other technologies to meet the market demand. High speed circuits are required in the computer and aerospace industries.
With the further increase in package density, coupled with the reduction in discrete component size and the rapid development of microelectronics technology, the size and quality of electronic devices are shrinking. Due to the limited space available, single PCBA boards are impossibly, a further increase in assembly density is achieved, so it is necessary to consider using more printed circuits than the double layer, which creates conditions for the emergence of multilayer PCBA boards.
