Talking about the Development and Application Prospect of Flexible Circuit Board

- Dec 27, 2019-

Talking about the Development and Application Prospect of Flexible Circuit Board

  Abstract: With the upgrading of electronic products, FPC (flexible circuit board) caters to the development trend of light, thin, short and small electronic products with its unique advantages, and plays an important cornerstone role in the field of electronic information industry. This article analyzes and discusses the application of FPC in the field of application, especially its application in the three major fields of mobile phones, automobiles, and medical monitoring equipment, and makes an outlook for the future development of FPC.


  Keywords: FPC FPCA FPC application automotive electronics medical monitoring equipment SMT mobile phone


I. Overview of Flexible Circuit Board


  Flexible printed circuit (FPC), also known as flexible circuit board, flexible circuit board, referred to as flexible board or FPC, has high wiring density, light weight, thin thickness, less wiring space restrictions, high flexibility, etc. The advantages are fully in line with the development trend of thin, light and short electronic products, and are an effective solution to meet the miniaturization and mobile requirements of electronic products. FPC can be bent, rolled and folded freely, and can withstand millions of dynamic bending without damaging the wires. It can be arranged arbitrarily according to the requirements of space layout, and can be moved and retracted in three dimensions to achieve component assembly and wire connection Effect of integration. FPC can greatly reduce the volume and weight of electronic products, and is suitable for the development of electronic products in the direction of high density, miniaturization and high reliability. Therefore, it is widely used in PC and peripheral products, automotive electronics, medical equipment, communication products and consumer electronics.


  FPCA (Flexible Printed Circuit Assembly) products, that is, FPC components, extend the industrial chain of FPC business, and the mainstream technology in the industry is SMT. SMT (Surface Mount Technology) is the surface mounting technology of electronic circuits, also known as surface mount or surface mount technology. It is a method of mounting lead-free or short-lead surface-mounted components (SMC / SMD for short, chip components in Chinese) on the surface of a printed circuit board or on the surface of other substrates, by reflow soldering or dip soldering, etc. Solder-assembled circuit assembly technology. The application of SMT technology has the following advantages:


  First, the assembly density is high, the electronic products are small in size and light in weight. The volume and weight of the chip components are only about 1/10 of the traditional plug-in components. Generally, after using SMT, the electronic products are reduced in size by 40% to 60% and the weight is reduced 60% to 80%. Second, high reliability, strong seismic capability, low solder joint defect rate, and good high frequency characteristics. Third, it reduces electromagnetic and radio frequency interference. Fourth, it is easy to realize automation and improve production efficiency. Fifth, save materials, energy, equipment, manpower and time.


Second, the application of flexible circuit boards


  The trend of light, thin, short, and small electronic products has made FPCs quickly shift from military to civilian and consumer electronics. Nearly all high-tech electronic products emerging in recent years have adopted flexible circuit boards. Japanese scholar Sakura Kenshi said in his book "High-density flexible printed circuit boards": Almost all electrical products use flexible circuit boards inside, and today I am afraid it is difficult to find slightly more complicated electronic products that do not use flexible circuit boards. Already.


3. Market Prospects of Flexible Circuit Boards


  As mentioned in the "Guide to the Priority Development of High-Tech Industrialization (2011)": The National Development and Reform Commission, the Ministry of Science and Technology, the Ministry of Industry and Information Technology, the Ministry of Commerce and the Information Property Agency have decided to replace high-end chip components, high-density Multilayer printed circuit boards and flexible circuit boards are listed as one of the current high-tech industrialization areas of priority development. With the continuous advancement of information and intelligent construction, the market demand for flexible circuit boards will also increase.


   (1) Mobile phone market. As far as mobile phones are concerned, FPCs are mainly used for signal connection parts such as folding and rotating in mobile phones. At present, more than 3 FPCs are commonly used in mobile phones. With the popularity of high-performance mobile phones that are light, thin, short, and small, FPCs are being driven. demand. FPC can be used in functions such as mobile phone bends, LCD modules, camera modules, keys, side keys, antennas, battery control and other functions. At present, FPC is most commonly used in the mobile phone's Hinge Part. Common folding, sliding, flip, and three-dimensional rotating bodies are mostly double-sided or multi-layer FPC designs, which is the largest output value of FPC in mobile applications. By. As for the key FPC, camera module, antenna or battery FPC, it is an optional design for mobile phone designers. Under the situation that the above-mentioned optional functions will be gradually incorporated into the standardized design of mobile phones, it will help increase the amount of FPC. The 2014 Communiqué of the Ministry of Industry and Information Technology showed that in 2014, there was a net increase of 39.426 million telephone users across the country, reaching a total of 1.536 billion households, an increase of 2.6%, a decrease of 5 percentage points from the previous year. Among them, there was a net increase of 56.98 million mobile phone users, with a total of 1.286 billion. The penetration rate of mobile phone users reached 94.5 per 100 people, an increase of 3.7 per 100 people over the previous year. The smartphones dominated by Apple and Android phones have become the first choice of mobile phone users. According to the "2013-2014 Annual Report on China's Mobile Phone / Smartphone Market Research", the global smartphone user ratio surpassed the global population for the first time in 2015. One-tenth, by 2018, one-third of consumers worldwide will be smartphone users, with a total of more than 2.56 billion people. The 2018 smartphone user index represents half of global mobile phone users, which means that feature phones will become a minority in the field of electronic communications. The FPC content of smart phones is higher than that of general electronic products. Smart phones use 5 to 12 FPCs, which is higher than 1 to 5 tablets of feature phones. The FPC output value of each smart phone is about 2 to 3 times that of feature phones. Such a huge market will inevitably drive the rapid development of related fields. Camera modules, antennas, displays, USB cables, etc. of smart phones cannot be separated from FPC.


  (2) Automotive electronics market. Under the trend of automotive electronics, automotive control systems, such as dashboard displays, air quality, audio, displays, sensors, etc., and the requirements of high signal transmission and high reliability make FPC begin to show its advantages. Under the trend, coupled with the three-dimensional structure of the car body, the wiring area is narrow and bent, the use of FPC components can better meet the design requirements. According to the China Automobile Industry Association, in 2014, China's auto production and sales increased by 7.26% and 6.86% year-on-year. Among them, the production and sales of passenger cars increased by 10.15% and 9.89% year-on-year, which remained the main growth force.


  (3) Medical monitoring equipment. In the past ten years, the sales scale of China's medical device market has increased from 17.9 billion yuan in 2001 to 212 billion yuan in 2013. Excluding the influence of price factors, it has increased by 11.84 times in 13 years. According to the sample survey statistics of the China Medical Materials Association Medical Devices Branch, the sales of medical devices nationwide in 2014 was approximately 255.6 billion yuan, an increase of 43.6 billion yuan from the previous year's 212 billion yuan, a growth rate of 20.06%. Medical monitoring equipment, as a conventional medical equipment in hospitals and other medical institutions, has gradually become widely adopted by large and medium-sized hospitals. With the rapid development of China's economy, the state attaches great importance to the construction of primary medical and health systems at the county level, townships, and communities, and is promoted by internal and external needs such as aging, second-child policies, consumption upgrades, medical reform investment, and policy support, and At present, the overall domestic level is maintained at a relatively low level, and there is still considerable room for development of medical monitoring equipment. The development prospects of the domestic medical device industry are worth looking forward to.

In summary, as society's requirements for informationization and intelligence continue to increase, and it has penetrated almost all industries, as mentioned in the article, it is difficult to find slightly more complex electronic products that do not use FPC and FPC components. . As the country will further increase the investment in electronic informatization construction in various fields, the acceleration of the pace of electronic informatization construction in the downstream fields will inevitably drive the development of the FPC and FPC component industries. At the same time, 4G business has been rolled out across the country, which will also bring new development opportunities to the flexible printed circuit board industry.


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[2] Li Chunfu. Face to Face of Flexible Circuit Board [J] .Screen Printing, 2012 (09).

[3] Li Chunpu.Selection, Detection and Application of Flexible Electronic Materials [J] .Screen Printing, 2014 (02).

[4] CCID Consulting, Electronic Information Industry Research Center. 2013-2014 China Mobile / Smartphone Market Research Annual Report [R].

[5] China Business Information Network. 2014-2018 China Automotive Intelligentization Trend Analysis and Market Prospect Analysis Report [R].

[6] Sun Jianwei. Analysis of China's Medical Device Industry Competitiveness [J] .Contemporary Economy, 2015 (04).

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