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How UV Lasers Helps In Printed Circuit Board (PCB) Drilling

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Laserod Wafer
How UV Lasers Helps In Printed Circuit Board (PCB) Drilling

The trend in designing printed circuit boards (PCB) towards smaller features at very high densities is necessary to serve the fast-growing demand for high-tech customer products. This includes new laser processing capabilities, including laser micro drilling. PCB drilling machines are a modern generation of drilling machines that use a high-power picosecond laser to allow the higher output of blind holes in PCBs.

How It Works

The PCB drilling machine uses a short lapse pulse with a high power density to quickly feed energy into the workpiece, causing the material to melt and vaporize. The greater the pulse energy, the more material is melted and vaporized. Vaporization will cause the material volume in the drilled hole to increase suddenly, creating high pressure. This will cause the vapor pressure to expel the molten material from the hole.

Percussion Drilling with Laser Micro drilling

The PCB drilling machine has to make through holes (vias), and blind holes have to be drilled into the printed circuit board, which acts as the interconnections between the layered systems. Both the holes should have straight walls. Percussion drilling using UV lasers is a method of choice for most PCB drilling. They reach very high drilling rates of several thousand holes per second and can drill diameters as small as 75μm.

The use of laser micro drilling makes it possible to drill smaller diameters. The creation of blind holes is easily achieved by controlling the number of pulses. Ramping up the pulse energy isnot required. The modern laser drilling machines are built in an external modulator. This is used to control and adjust the pulse energy, which varies from pulse to pulse, allowing precise control of the drilling process.

Laserod is one of the industry’s commanding experts in laser micro drilling of polymers & other substrates. Our high pulse laser micromachining services are uniquely suited for microscale-polymer machining for many applications. For all sorts of laser micro drilling, slotting, grooving, or scribing thin materials, metals and polymers, please contact Laserod Technologies today at 1-888-991-9916 / 1-310-340-1343!

 

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