PW Circuits can now produce burr free half a hole PCB design, also know as castellated PCBs. Old methods of routing away half the hole resulted in a burr remaining or the plating being ripped out of the hole, but with new processing stages this can now be achieved.  

Half holes, also known as castellated holes, are a type of through-hole that extends only partially through a PCB.

Unlike traditional through-holes that go completely through the board, Half a hole PCB design provide a plated surface on one side of the PCB for soldering components.  

How do they work?

• Structure: Half holes are essentially plated through-holes cut in half. They have a plated wall on one side of the PCB, which acts as a landing pad for components.
• Function: Primarily used for board-on-board connections, half holes allow for the direct soldering of one PCB to another without the need for additional connectors. This provides a slimmer profile and potentially better electrical connection.
• Applications: Common applications include:
  • Board-on-board connections: Combining different PCB technologies or adding modules.
  • Fine-pitch SMD components: Providing a better landing pad for small components.
  • RF assemblies: Used in high-frequency applications due to their reduced height.

Advantages of Half Holes

• Space-saving: Reduces overall PCB thickness.  
  Improved electrical connection: Direct soldering can provide better conductivity.
• Cost-effective: Can eliminate the need for additional connectors.
• Enhanced reliability: Can reduce the risk of connection failures.

Contact us today for more information on your half hole PCBs.