Printed circuit boards are the foundation of electronic information products. Printed circuit board applications cover almost all electronic products, including communications and related equipment, computers and related equipment, consumer electronics, automotive electronics, aerospace electronics and other industries. Driven by the development trend of information and digitization, the PCB industry has broad market space and good development prospects.

In recent decades, the rapid development of integrated circuit technology and electronic information products has led to the continuous development of printed circuit board technology. The printed circuit board has gradually developed from single-sided to double-sided, multi-layered and flexible. As a new generation of electronic products require higher density, more stable performance of the printed circuit board, therefore, high density and high performance is the future direction of development of printed circuit board technology. With the printed circuit board toward the refinement direction, laser applications in the PCB industry is also increasing.

FPC laser cutting

FPC is a printed circuit board with a flexible substrate made of graphics, with high wiring density, light weight, thin thickness and so on. FPC mainly used in mobile phones, laptops, PDAs, digital cameras, LCM and other products, especially for circuit complexity, high signal processing requirements or have special electrical or mechanical properties of applications.

Disadvantages of the traditional processing methods

For FPC cutting, the traditional processing method is to use a mold, and then mechanical stamping through the mold. This processing method is a contact-type machining, so inevitably there will be some deficiencies:

● Due to the continuous increase of the line density and the pitch of the FPC products and the more complicated FPC pattern contours, it is more and more difficult to manufacture the FPC molds. For the general FPC, the difficulty of making molds, the production cycle becomes longer, resulting in a substantial increase in processing costs; and for very complex FPC, this very complicated mold making has been unable to achieve, it must be considered Use more advanced ways to cut these complex FPC.

Due to the lack of mechanical processing, the manufactured FPC mold can not reach a very high precision surface, which further restricts the FPC machining accuracy. The current mold processing can achieve the accuracy of ± 50um, and in order to achieve the accuracy of ± 20um the following is very difficult, or even impossible.

● Because the traditional FPC cutting is a contact machining method, it is bound to generate processing stress on the FPC, which may cause physical damage to the FPC. At the same time by way of machining the cover film for the window operation, it is inevitable in the vicinity of the window after the red glitch and overglaze produced, and this burr and glue after the paste, lamination, the pad is very Difficult to remove, a direct impact on the quality of the coating.

Laser processing technology advantages

The working principle of FPC laser cutting machine is to scan the FPC surface with a 355nm ultraviolet short wavelength laser beam so that high energy UV photons directly destroy the molecular bond on the surface of the flexible material to achieve the purpose of removing the material. UV laser processing is a "cold process," the "cold" photolithography of the parts out of the heat-affected zone is small, with smooth edges and minimal carbonization, to ensure that processed FPC products of the highest quality.

Kenbo FPC laser cutting machine is a set of light, machine, electricity, material processing in one of the laser processing equipment, the processing advantages are obvious:

● Laser processing for non-contact processing, heat-affected parts of the processing process is small;

● High-performance UV laser with small focusing spot, uniform power distribution, small thermal effect, small kerf width and high cutting quality.

● The use of precision two-dimensional workbench and full-closed CNC system to ensure fast cutting while maintaining the order of microns high-precision;

● Position sensor and CCD image positioning technology, automatic positioning, focusing, positioning fast and accurate, saving time and worry, high efficiency.

PCB laser marking

In the circuit board production process, the bar code traceability is an essential part. In order to product production management and defective product control, the manufacturer will use the bar code, text and other information on the product logo. At this stage, the industry generally uses ink label paper on the product, but this method has many problems: large supplies, high pollution, high labor costs, easy to remove the tag and so on. In response to this situation, laser marking bar code label paper has become the industry trend.

Case number one

A domestic electronic materials company for a long time to provide FPC touch screen manufacturers supporting, after the company has been using traditional open-die cutting FPC cutting. With the continuous upgrading of end-customer products, the requirements for supporting FPC are getting higher and higher, such as special-shaped requirements, varieties and short delivery times. In order to meet the changing needs of end customers, they began machining FPC samples using Kennex LBA10U FPC laser cutters. Since then, high-quality, fast response, short delivery and other advantages, allowing them to get more orders for the company.

Case two

A processing plant for a long time to provide customers with PCB Fu Code processing services, the plant has been using "paste high temperature tags" Fu code, operating costs, with double version of the calculation, 3-4 production lines per month is about 200,000. If each circuit board affixed a 40mm * 6mm size of the high temperature tags, the monthly fixed cost of at least 60,000 yuan, multi-board processing costs doubled. Later, the plant introduced a set of Ken Bo advanced PCB laser marking solutions, although the replacement of processing equipment when the one-time investment seems larger, but the new equipment put into use, the processing efficiency and product yield improved significantly, the latter part of Completely eliminating the cost of supplies, and fully automated production line operation also reduces labor costs. Soon, the factory stands out in the competition with the industry, far ahead.