Custom Multilayer HDI Interconnect PCB Circuit Board 0.4mm Half Plating Vias

10 Layer Multilayer HDI Circuit Board 0.4mm Half Plating Vias PCB

♦ What ​​is Blind Hole in PCBs?

Half Plating Vias​​ (also called ​​Partial Plating Vias​​ or ​​Non-Through Plating Vias​​) are a type of via structure used in printed circuit board (PCB) design where the conductive plating does not fully extend through the entire via hole.

​​Key Characteristics:​​

1. 1. ​​Partial Copper Plating​​:

      • Unlike standard ​​fully plated through-hole vias​​, half-plated vias have copper plating only on one side or a portion of the via wall, leaving the other side unplated or partially plated.

   2. ​​Controlled Depth Plating​​:

      • The plating may stop at a certain depth, either by laser drilling, controlled electroplating, or plugging material (e.g., resin).

   3. ​​Common Applications​​:

      • ​​Blind/Buried Vias​​: Used in HDI (High-Density Interconnect) PCBs to connect inner layers without passing through the entire board.
      • ​​Via-in-Pad Designs​​: Helps prevent solder wicking into the via during assembly.
      • ​​RF/Microwave PCBs​​: Reduces parasitic capacitance and improves signal integrity.
      • ​​Thermal Management​​: Used in thermal vias to control heat dissipation.

Manufacturing Methods:​​

• • ​​Laser Drilling + Plating​​: Laser creates a cavity, followed by selective plating.
  • ​​Plugging & Partial Plating​​: Filling part of the via with dielectric material before plating.
  • ​​Sequential Lamination​​: Used in HDI PCBs to create buried or blind half-plated vias.

♦ ​​​​Comparison with Other Via Types?​

♦ ​​Conclusion​

Half plating vias are an advanced PCB design technique used to optimize space, signal performance, and manufacturability in complex multilayer boards, especially in high-frequency and miniaturized electronics.

♦ Technical Parameters

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