7.7 Mechanical Processes | Countersinking/Depth Milling

Recesses can be created in the PCB mechanically, e.g.:

• Depth-milled side edges for PCB inserts
• Step milling for round contours to provide a lid function on a cylindrical housing, as shown in the picture on the right
• Cavities, e.g., for countersinking components
• Depth milling on embedded copper inlays for electrical contacting by laser welding
  Learn more under 3.6.2 HSMtec® PCB | High-Current – Contact/Connection Technologies
• Conical or cylindrical countersinking of holes (both PTH and NPTH)

using the z-axis controlled milling machines, these can be depth-milled or countersunk with a high level of precision.