How to distinguish PCB circuit board Quality

With the rapid development of mobile phone, electronics, telecommunications and other industries,it prompted the PCB circuit boards industry strength and growth,and people have higher requirement for the PCB components layers,weight, precision,material,colour and reliability 
But because of the competition of the market price,the cost of PCB material is also on the rise,more and more manufacturers in order to enhance the core competitiveness, and monopolize the market with low price.And the cost comes from the low cost material and change the production process,but the PCB circuit boards always have crack or scratch,and its precision and capacity is not achieve the requirement,and it will influence the reliability and assembly capacity much.
In the face of the many different PCBs in the market,how to distinguish the quality of PCB can start with two aspects,one is from surface of the PCB,and the other is from PCB quality specification requirements.

The way to to distinguish PCB circuit board Quality:

One:From the surface of the PCB citcuit boards
Generally,we can check PCB circuit boards surface from 3 aspects,
1, Size and thickness specification requirement
The PCB has different requirement for its thickness and zise,customers can measure that.
2,Lights and colour
The outside of PCB have oils,and it can protect the PCB,and with as insulation material,if the PCBs colour if not bright,and oil less,the PCB is not good.
3 Solder points surface
Since there are a lot of components on the PCBs,if assembly points is not good,the parts will drop,and it will influence the PCB quality a lot.

Two:The high quality PCB circuit boards can meet the below requirement.
1,After assembly,the electronic connect is very good.
2,The track width,thickness,and space meet the requirement,and it can avoid short circuit and power off after use.
3,After the high temperture,the copper will not drop
4,The copper surface will not be be oxidized easily.
5,No extra electromagnetic radiation
6,No sharp distortion,then it will not influence the screw mounting.
7,In high termperture and high humidity environment,it can work well.

Hope this will help you to find your best PCB circuit board suplier.

PCB copying board wiring technology

Circuit board design steps
The design of the circuit principle diagram：schematic drawing tools and all kinds of editing are necessary to get a correct and fine circuit principle diagram.
A network table:Network table is a bridge between
circuit design schematic diagram (SCH) and printed circuit board (PCB) design and it is the soul of the circuit board automatically.Network table can be obtained from the circuit principle diagram,and it can also be obtained from the printed circuit board.
The design of the printed circuit board:The design of the printed circuit board is mainly for PCB.In the process, we use the PCB design software to provide the power of implementation circuit board layout,and to complete tough job.

Draw up the simple circuit diagram.

1)After design drawing size PCB/Sch,Firstly we need to design part drawing,then to design drawing size.Drawing size is confirmed according to the scale and complexity of the circuit diagram.Setting the appropriate drawing size is the first step to design schematic diagram.

2)Set up the PCB/Sch design environment.That is including set lattice sizes and types、and the cursor type, etc.Most of the parameters can also use the system default values.
3)Rotating parts.User takes the parts from the parts library,according to the need of the circuit diagram,then  place them on drawings.He also defined even set the serial number and packaging of parts .

4)Wiring according to the schematic .We need to connect components in the drawings with electric wires and symbols,Using a variety of tools provided by the PCB/Sch.Then we can constitute a complete schematic diagram .

Matters needing attention:

A circuit board via brings about 10 pf capacitance effect,which introduce too much interference,for the high frequency circuit.So we should try to reduce the number hole when we are wiring.On the other hand,too much hole will lower circuit board
mechanical strength.

Development trend of global PCB industry

1.Global PCB industry will maintain steady growth

According to the network statistics and forecast by Chinese insight into the industry, Between 2012 and 2017, the global PCB will maintain a steady growth of 3.9% CAGR, and in the overall size of the year, it will be expected to reach $65 billion 654 million in 2017.

                                                                     Global PCB industry output forecast

2.Asia has become the world's leading of PCB, China is in the center of Asian market

Since twenty-first Century, the focus of the PCB industry has shifted to Asia, forming a new industrial structure. Asia's PCB output value of nearly 90% of the world, is the world's leading PCB, especially in China and Southeast Asia. According to China industry insight network statistics, from the beginning of 2006, China surpassed Japan as the world's largest and fastest growing PCB manufacturing base, and has become the main driving force to promote the development of the global PCB industry. According to Prismark forecast,China's PCB output value will reach $28 billion 972 million, accounting for 44.13% of global output in 2017.

3.Global PCB main product structure is optimized, the future development trend is clear

With the pursuit of light, thin, short and small electronic products, PCB continues to develop in the direction of high precision, high integration and thinness. In 2011, the total output value of single / double sided board was 0.4% higher than in 2010, and the output value of multilayer board increased by over 1.1%, and the total amount of PCB was still the dominant position. HDI board grew by 17.4%, and it is the largest growth rate of output value in the PCB board type. According to Prismark forecasts, the global PCB industry will continue to grow steadily in the future, including HDI board, multilayer board will maintain a good momentum of development.From 2012 to 2017, HDI board compound growth rate will reach 6.5%, becoming the main growth point of the PCB industry, multilayer composite growth rate will reach up to 1.2%

4.Strong demand for the future of the main application areas, PCB industry Rally strong

The electronic information industry a good momentum of development is the foundation of PCB industry development, sustained high king PCB the lower area of the bearing will boost the rapid development of PCB industry. With the development of modern technology, downstream of PCB is currently experiencing the favorable opportunity of upgrading product technology upgrades, which occupy the top three computer, communication and consumer electronic products continue to shorten the replacement cycle. The new hot spots for the PCB industry is facing a broader market space and demand scale.According to China industry insight network statistics and forecasts, in 2017 will reach $23690 a hundred million, an average annual compound growth rate of 4.41%.

Market size and forecast of China’s PCB industry in 2017

China's PCB development began in 1956, and gradually expand the formation of PCB industry. After the reform and opening up, through the introduction of foreign advanced technology and equipment, the rapid development of China's PCB industry. Before 2000, Europe, the Americas and Japan is the world's major PCB production base, accounting for more than 70% of global output. Since twenty-first Century, China has promoted the transfer of global manufacturing industry with the advantages of labor cost and investment policy. Electronic products industry chain gradually improved, in China has formed a huge market and demand for supporting space, And thus led to the development of the electronics industry, including PCB. 

In 2006, China's PCB production reached 130 million square meters, the output value reached $12 billion 100 million, accounting for PCB of the world's total output value of 24.90%, more than Japan to become the world's NO.1. The global financial crisis in 2008 caused a huge impact on the PCB industry, but did not cause a disastrous blow to China's PCB industry. Under the stimulus of the national economic policy, China's PCB industry in 2010 has been fully recovered. 2014 China PCB circuit board production of about 235 million square meters, an increase of 210 million square meters in the same period in 2013 of up to 11.90%, In recent years, China's PCB circuit board output as shown in the following figure:

According to Prismark forecasts, the next few years the global PCB industry will remain stable growth. The market size of Global PCB industrywill reach to $65 billion 700 million in 2017. During 2012-2017 China PCB industry will continue to maintain growth trends, and the global market position will continue to improve. By 2017 the total output value will reach $28 billion 972 million, The proportion of the world rose to 44.13%. 

As” the mother of electronic products”, It is necessary and irreplaceable in the production process of downstream electronic products. The development trend of China's PCB industry is based on the good development trend of electronic industry, PCB downstream industry demand is driving the rapid development of PCB industry.

The future, as China's comprehensive deepening of informatization construction, the process of urbanization continues to accelerate, market-oriented continuous improvement, upgrading of residents' income growth, expansion of domestic demand, consumption structure, computer, communication equipment, IC packaging, consumer electronics and other industries will gain momentum, the development and update of product replacement will enable the PCB industry usher in a broader market space。