through-hole vias

through-hole vias are used to connect all layers of a PCB

through-hole vias are apertures that penetrate all layers of a PCB, with openings at both ends. They are commonly used to connect circuit traces across layers and accommodate component leads, representing a standard hole type in traditional PCB design.

Description

Through-hole vias are a common type of hole structure in printed circuit boards. They refer to holes that penetrate from one side of the PCB to the other, used to connect conductive traces between different layers of the board and also serve as mounting points for component leads.

Key Features

  1. Penetrates all layers of the PCB, extending from the top layer to the bottom layer, with both ends exposed on the PCB surface. The hole is fully transparent.
  2. Commonly used to connect conductive traces between different layers of the circuit board and for mounting component leads.
  3. Manufactured using mature processes, typically involving mechanical drilling or laser drilling followed by metallization (electroplating) to achieve electrical continuity.

Applications

  1. Establish electrical connections between PCB layers.
  2. Allow traditional through-hole components (resistors, capacitors, ICs, etc.) to be soldered by inserting pins into the holes.
  3. Widely used in various circuit board types, especially double-sided and multilayer boards.

Advantages

  1. Secure connections with stable and reliable electrical performance.
  2. Mature manufacturing process, low cost, suitable for mass production.
  3. Facilitates manual assembly and maintenance.