12 Layer Blind Hole HDI PCB for Medical Device 

♦ What ​​is Blind Hole in PCBs:?

A ​​blind hole​​ (or ​​blind via​​) is a type of ​​PCB via​​ that connects an ​​outer layer to one or more inner layers​​ but does ​​not go through the entire board​​ (unlike a through-hole via).

​​Key Characteristics:​​

✔ ​​Starts from the surface​​ and ends at an internal layer.
✔ ​​Not visible from the opposite side​​ of the PCB.
✔ ​​Used in HDI (High-Density Interconnect) PCBs​​ to save space.
✔ ​​Laser-drilled​​ (typical diameter: 50–150µm).

♦ ​​Blind Hole vs. Other PCB Vias​​​?​

♦ ​​Why Use Blind Holes?​​

1. ​​Space Saving​​ – Allows more routing in compact designs (e.g., smartphones).
2. ​​Improved Signal Integrity​​ – Reduces stub effects in high-speed circuits.
3. ​​Higher Layer Utilization​​ – Enables complex multilayer PCBs (e.g., 10+ layers).
4. ​​Better Thermal Management​​ – Shorter paths reduce heat buildup.

♦ Technical Parameters

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