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

Printed circuit board assembly

Components on a PCB are connected electronically to the designed circuits by two different methods. The first method is called "Through Hole Technology" and the second and newest method is called "Surface Mount Technology" Through Hole Technology requires a component that has thin wires, or leads, which are pushed through small holes in the substrate and soldered to connection pads in the circuits on the other side of the board. The contact with the holes and pull of gravity between the leads and the sides of the holes enables the components to stay in place until they are soldered. Surface Mount Technology has stubby J-shaped or L-shaped legs on each component keeping contact with the printed circuits directly.

A solder paste consisting of glue, flux, and solder are then applied at this point of contact to allow the components to be held in place until the actual solder is melted or "reflowed," in an special oven to make the final connection complete. Although surface mount technology requires greater attention and care in the placement of the components, its benefits are that it eliminates the time-consuming drilling process as well as the space-consuming connection pads characteristic with Through Hole Technology. In today’s manufacturing, both technologies are frequently used.

Wonderful PCB limited is a professional PCB manufacture, but we also experience in PCB assembly,for THT manufacture, we using semi-automatic and automatic insertion equipment and ensuring proper tape and reel component purchasing, we deliver timely and low-cost solutions. PCB assembly depot offers both automated and hand assembling of through hole components. Our assembly lines support both simple and complex board assemblies. For assemblies like nuts/bolts, riveting and studs, that require manual/mechanical assembly, we have a team of highly trained, qualified and experienced assemblers. We have advanced equipment for SMD from screen printers to smt placement machines to reflow ovens.

Printed circuit board with India Market

India is known to be the fifth largest economy of the world with the second largest Gross Domestic Product among many emerging economies. cheap Labour and more and more skilled people in printed circuit board(PCB) industry , attract customers all over the world buy PCB or set up factory in india . But still many india company buy PCB from china, because we have very advanced equipment and production capacity, also with highly skilled engineers .

In wonderful PCB Limited, 15% is Indian customers, some cooperate with us more than 10 years, because we have very high quality and good price, they don’t need to worry about any things for cooperating with us, we have Professional Engineers to solve technical problem, perfect quality inspection system and Good sales team for communication and service.

Our PCB capabilities include 1 to 28 layer PCB’s, Material - FR4 , CEM1, CEM3, aluminum FPC, RFPC, and Special material, Thickness 0.8mm to 6.5 mm, Copper Finish 1oz-6oz, Surface Finish - HASL Leaded free and HASL with lead ,Immersion Gold/silver/Tin, flash gold, gold finger ,OSP.