PCB | May 18, 2006

Microvia drilling - retain your process control

Process Control of Microvia Drilling in BGA Board Materials. CircuiTree published this technical article to help you keep up with the important process control of microvia drilling BGA boards.
Are you getting the most productivity out of your drilling system?

Most modern PCB drilling systems use air-bearing spindles due to the need for extreme accuracy and high speeds up to 300,000 rpm. These motorized spindles rotate miniature drill-bits as low as 50 microns in diameter, and offer further benefits of very low friction, high stiffness and precise geometric control.

PCB drillers and OEMs use a wide range of techniques to quantify hole registration accuracy, including statistical methods such as the calculation of the process capability (Cpk). This is a critical validation measure used to qualify a particular drilling process or machine system; it is essential to understand the machine and process elements contributing to the process capability parameter. For successful process control and high-productivity, the whole drilling system--combining machine and spindle--must be carefully monitored and controlled.

Click here to read the full article on


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