De kopersporen op een printplaat dragen elektronische signalen over en verdelen de stroom tussen componenten en apparaten. This complex network of conductive pathways allows all the functional elements on the board to operate in harmony. One of the most important design decisions when engineering a PCB is determining the appropriate PCB copper thickness for the traces. In dit artikel, we’ll look closely at the common copper thicknesses used in PCBs, discuss why utilizing thicker copper is advantageous in high power applications, and go over the key factors designers must consider when selecting the optimal circuit board copper thickness for their particular circuit requirements and constraints. Laten we erin duiken.
Copper thickness refers to the weight of the copper foil laminated onto the PCB-substraat, expressed in ounces per square foot (oz/ft2). Typical weights range from 0.5 oz to 3 oz:
0.5-1 oz copper thickness: An extremely thin copper foil at 0.0007 inches thick. Used for lightweight, low current PCBs where tight trace spacing and thin board profile are needed. The minimum trace size and spacing are very small with one ounce copper thickness.
1-2 oz koper: The standard and most common copper weight for general PCB designs. It provides a balance of electro-thermal performance and manufacturability. Suitable for most medium complexity PCBs.
3 oz koper: Considered a heavy copper PCB. It is robust enough for high current power circuits, which can handle up to around 8-10A per trace before overheating or voltage drop becomes an issue. It provides enhanced stability and reliability.
While utilizing heavy copper foils increases PCB cost, there are important advantages that make it the right choice for high power circuit designs:
Selecting the optimal PCB copper thickness for a particular design requires considering several interrelated factors:
Selecting the optimal copper thickness in PCB design is a complex balancing act that requires thoroughly analyzing the expected current loads, thermal dissipation characteristics, manufacturability limitations, and material cost tradeoffs. Heavier copper weights with excellent current capacity and thermal performance do come at the price of increased board dimensions and expense. PCB designers must judiciously match the trace copper thickness to the electrical needs and constraints of the application, while considering all interdependent design factors. With informed trace thickness decisions, board performance can be maximized within the available budget and fabrication capabilities. Neem contact op if you need assistance determining the ideal copper weight for your next PCB.
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