To assist you accurately, I would need to know the specific statements you are considering about circuit boards. However, I can provide some general statements that describe circuit boards:
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Electrical Connectivity: Circuit boards provide pathways for electrical current to flow between components such as resistors, capacitors, and integrated circuits.
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Component Mounting: They serve as a base for mounting electronic components, enabling assembly in a compact and efficient manner.
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Layer Structure: Circuit boards can be single-sided, double-sided, or multi-layered, with multiple layers used to accommodate complex circuits and minimize size.
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Materials: Most circuit boards are made from materials like fiberglass (FR-4) or phenolic resin, which provide good electrical insulation and mechanical strength.
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Design and Fabrication: Circuit boards are designed using CAD (computer-aided design) software and are fabricated using various processes, including etching and soldering.
If you provide the specific statements you have in mind, I can confirm which ones accurately describe circuit boards.