Blind holes and Buried holes in PCB manufacturing process PCB holes, or vias, are essential for connecting different layers within a printed circuit board (PCB) and mounting leaded components. They can be categorized into three main types: blind vias, buried vias, and thru-hole vias. Blind vias connect an outer layer to an inner layer but do not go through the entire board. They help save space and enhance heat transfer but are more expensive than thru-hole vias due to their complex manufacturing process. Buried vias connect two or more internal layers without reaching the outer layers, adding to the difficulty and cost of production.
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