印刷線路應在指定佈線規則的約束下,在組件之間採用最短路徑。 盡可能限制平行導線之間的耦合。 良好的設計需要最少的佈線層數,還需要與所需的封裝密度相對應的最寬的導線和最大的焊盤尺寸。 因為圓角和光滑的內角可以避免可能發生的一些電力和機械問題,所以應避免導線中的尖角和尖角。
PCB板 width 和 thickness
The figure shows the current-carrying capacity of etched copper wires on rigid printed boards. 對於1oz和2oz導線, 考慮蝕刻方法, 銅箔厚度和溫差的正常變化, it is allowed to reduce the nominal value by 10% (in terms of load current); for the printed board assembly coated with a protective layer (The thickness of the base 材料 is less than 0.032英寸, and the thickness of the copper foil is more than 3 ounces), 成分减少15%; 對於已浸過的印製板, 允許减少30%.
PCB wire spacing
The minimum spacing of wires must be determined to eliminate voltage breakdown or arcing between adjacent wires. 間距是可變的, it mainly depends on the following factors:
1) Peak voltage between adjacent wires.
2) Atmospheric pressure (maximum working altitude).
3) The coating layer used.
4) Capacitive coupling parameters.
臨界阻抗組件或高頻組件通常放置在非常靠近的位置,以减少臨界階段延遲. 變壓器和感應組件應隔離,以防止耦合; 感應訊號線應垂直直角敷設; 應隔離或嚴格安裝因磁場運動而產生任何電雜訊的部件,以防止過度振動.
以上是PCB佈線和定位的介紹. Ipcb也提供給 PCB製造商 and PCB製造 科技.