Laser Technology in PCB

In PCB production, actually, sometimes we will use the laser technology. U.K. researchers are exploring whether laser technology can provide a low-cost, chemical-free method of making printed circuit boards.

The project is developing a dry printing method that uses no chemicals. DMU’s Rapid Prototyping and Manufacturing Group, led by Professor David Wimpenny, will develop a deposition system based on a combination of laser printing and fiber laser consolidation of the deposited material. The project will initially look at laying conductive tracks on the circuit boards but could also be used to deposit layers of dielectric or protective materials, solder for connection of devices and also to print legends on boards. De Montfort University Leicester (DMU) academics are taking part in the Laser Printed Electronics (LPE) two-year research project aimed at providing an environmentally friendly production method for PCBs.

In commercial production, two kinds of laser technology can be used for laser drilling. One is CO2 laser, wavelength is in the wave band of far infrared ray. It is widely used in industrial micro hole (diameter is above 100um) drilling on printed circuit board. Due to very short punching time needed for one hole, so this kind of technology has high productivity. The other is ultraviolet laser , widely used in drilling holes with diameter less than 100 μm(especially productive when drilling diameter under 80μm) . The application of miniature circuit diagram enables diameter even to be less than 50μm. Therefore, in order to satisfy the increasing demand on micro via productivity, many manufacturers have started to introduce double-headed laser drilling system. The following is three main types in the present market:
· double-headed ultraviolet laser drilling system;
· double-headed CO2 laser drilling system;
· mixed laser drilling system(ultraviolet and CO2).

Each has its own advantages and disadvantages. Laser drilling system can simply be divided into two types: the double drill bits with single wavelength system and double drill bits with double wavelength system. No matter which type, there are two main parts affecting the drilling ability:
· laser energy/pulse energy;
· beam-positioning system.



Also, during FPC production, we will use laser technology to make the FPC shape. Wonderful PCB has many years experience in the laser technology production. If any need or questions, welcome your inquiry: China PCB Board Manufacturer