Drilling printed circuit boards

Drilling the holes

The drilling machine is computer-controlled. The operator selects the right drill program.  This tells the machine which drill to use and the X Y co-ordinates of the holes.  Our drills use air-driven spindles which can rotate up to 150,000 revolutions per minute.  High speed drilling ensures clean hole walls to provide a secure base for good plating on the hole walls.

Drilling is a slow process as each hole must be drilled individually.  So depending on the drill size we drill a stack of one to three PCB panels together.  We can drill holes down to 100 microns in diameter.  To give you an idea of the size, the diameter of a human hair is about 150 microns.  Drill change is fully automatic.  The machine selects the drill to use from the drill rack, checks that it is the correct size, and then loads it into the drill head.

Once all the holes are drilled the operator unloads the panels from the drilling machine and discards the entry and exit material.

Drilling the holes

The basic steps involved in processing a two-sided PCB are described as follows:

Data input

The software supplied with the LPKF ProtoLaser S and the LPKF ProtoMats processes all standard layout data formats. They position the layouts on the blanks and control the structuring.

Create fiducials

The fiducials are drilled with the LPKF circuit board plotter. The LPKF ProtoMats can be upgraded with an optical fiducial identification system for more precise positioning of the boards. The LPKF ProtoLaser S has these already included.

Structure the boards

Once the fiducials have been made, the LPKF ProtoLaser S/ProtoMat® structures the tracks – first on the front, and after rotation of the PCB, also on the back. The fiducials are used for precise positioning.

Drilling the holes for through-hole plating

The vias for through-hole plating are drilled by the LPKF circuit board plotter.

Through-hole plating

The LPKF ProConduct® is used after the vias have been drilled to reliably create the through-hole plating without using any messy chemicals. The PCB is now ready for further processing or incorporation in a multilayer board.

Contact Us

Get answers from a reliable PCBA partner in as little as 12 hours.

NOD Electronics - PCBA - PCBA Assembly Services

Address: Building E,Qixing Industrial Area,Xintang Town,Zengcheng District,Guangzhou,China 511340

Mobile: +86-1862-0101-507

E-Mail: sales@nod-pcba.com

Tel: +86-020-8232-4751