无标题

[akenpcb-blog]

The First Lady of Poland appeared to snub Trump for a handshake

[akenpcb-blog]

(通过 https://www.youtube.com/watch?v=0zCX0RdP23I)

[akenpcb-blog]

12 layer printed circuit boards with immersion gold

[akenpcb-blog]

AKEN

[email protected]

over 6 years PCB exporting experience in china,pcb sales engineer manager.

[akenpcb-blog]

AKEN profile.china pcb manufacturer

AKEN zhang

International PCB Board senior Sales Manager

 graduated from Sun Yat-Sen UniversityShenzhen City, Guangdong, China

1--normal pcb boards with through hole; 2--special pcb board(HDIpcb/bury/blind hole pcb); 3--2-20L pcb board/metal pcb/others material pcb boards; what ability AKEN have ? 1--good communication; 2--details of sales oriented; 3--high knowledge of PCB and importing&exporting knowledge; 4--be familiar with international importing law; 5--fast response(quotation never exceed 4hours reply to you) discuss with AKEN, 1--you will get the better price; 2--you will be guide how to save more cost which purchase pcb from China; 3--you never need to worry about quality control,lead time control,after-sales guarantee; 4--you never worry about how i get the goods from China; 5--you will get free sample policy from AKEN; However,we only focus on long term cooperation!

[email protected]

[akenpcb-blog]

what principles should follow when design PCB layout???

PCB circuit boards are the support of circuit components and devices in electronic products. Even if the circuit schematic design is correct, printed circuit board design is improper, but also the reliability of electronic products have a negative impact. When designing printed circuit boards, care should be taken to use the correct method to comply with the general principles of PCB design and to meet the requirements of anti-jamming design.

First, the PCB layout design should follow the principle:

First, consider the PCB size. PCB size is too large, the printed line length, impedance increases, anti-noise ability to decline, the cost increases; too small, the heat is not good, and adjacent lines vulnerable to interference. After determining the printed circuit board size, determine the location of the special components. Finally, according to the functional unit of the circuit, all the components of the circuit layout.

The following principles apply when determining the location of special components:

1, as far as possible to shorten the connection between high-frequency components, try to reduce their distribution parameters and mutual electromagnetic interference. The components that are susceptible to interference can not be too close to each other, and the input and output components should be kept as far away as possible.

2, some components or wires may have a higher potential difference between, should increase the distance between them, so as not to lead to accidental discharge short circuit. Components with high voltage should be arranged as far as possible in the debugging hand difficult to reach the place.

3, the weight of more than 15g of the components, should be fixed with a bracket, and then welding. Those large and heavy, more heat and more components, should not be installed on the printed circuit board, but should be installed in the machine chassis chassis, and should consider the cooling problem. The thermal element should be away from the heating element.

4, for the potentiometer, adjustable inductance coil, variable capacitor, micro switch and other adjustable components of the layout should consider the structural requirements of the machine. If the machine is adjusted, it should be placed on the printed circuit board to facilitate the adjustment of the place; if the machine outside the adjustment, its position to adjust the knob on the chassis panel to adapt to the location.

5, should be set aside the PCB positioning holes and fixed stent occupied by the location.

Second, the circuit components of the PCB layout, to meet the anti-jamming design requirements:

1, according to the circuit of the process of arranging the location of the various functional circuit unit, so that the layout of the signal flow, and make the signal as much as possible to maintain a consistent direction.

2, to each functional circuit of the core comonents as the center, around it to the layout. Components should be even, neat and compactly arranged on the PCB. Minimize and shorten the lead and connection between the components.

3, in the high frequency of the circuit, to consider the distribution of components between the parameters. The general circuit should arrange the components as parallel as possible. This is not only beautiful, but easy to install and easy to mass production.

4, located in the edge of the circuit board components, from the edge of the circuit board is generally not less than 2mm. The best shape of the circuit board is rectangular. Length and width are 3: 2 or 4: 3. When the circuit board size is greater than 200 × 150mm, the mechanical strength of the circuit board should be taken into account.

from AKEN.ZHANG

senior manager of CHINA PCB [email protected]

[akenpcb-blog]

how to judge the circuit board is good or bad？？？？

With the mobile phone, electronics, communications industry and other high-speed development, but also to promote the PCB circuit board industry,the growing and rapid growth, people for the components of the layer, weight, precision, material, color, reliability and other requirements become more and more higher.

However, due to fierce market price competition, PCB board material costs are also rising in the trend, more and more manufacturers in order to enhance the core competitiveness of low prices to monopolize the market. However, these ultra-low prices are behind the cost of materials and process to achieve the cost of production, but the device is usually prone to cracks (cracks), easy to scratch, (or scratches), its precision, performance and other comprehensive factors , Seriously affecting the use of the product in the solderability and reliability, and so on.

In the face of a wide variety of PCB circuit board on the market, to identify PCB circuit board can be good or bad from two aspects; the first method is to judge from the appearance, on the other hand is from the PCB board itself to determine the quality requirements.

First: from the appearance of the circuit board to distinguish between good and bad (under normal circumstances, PCB circuit board appearance can be judged by three aspects;

1, the size and thickness of the standard rules.

The thickness of the circuit board to the standard circuit board is different in size, and the customer can measure the thickness and specifications according to their products.

2, light and color.

External circuit boards are covered with ink, the circuit board can play the role of insulation, if the color of the board is not bright, less ink, insulation board itself is not good.

3, the appearance of the weld.

Circuit board due to more parts, if the welding is not good, parts easy to fall off the circuit board, seriously affect the quality of the circuit board welding, the appearance of good, carefully identified, the interface is very important point is very important.

Second: high-quality PCB circuit board needs to meet the following requirements

1, requiring components installed after the phone to be easy to use, that is, to meet the requirements of electrical connections;

2, the line width, line thickness, line spacing meet the requirements, so as to avoid the line heat, open circuit, and short circuit;

3, by the high temperature copper is not easy to fall off;

4, copper surface is not easy to oxidation, affecting the installation speed, after oxidation soon after the bad;

5, no additional electromagnetic radiation;

6, the shape is not deformed, so as not to install after the shell deformation, screw hole dislocation. Are now mechanized installation, circuit board holes and lines and design of the deformation error should be within the allowable range;

7, and high temperature, high humidity and resistance to special circumstances should also be considered within the scope;

8, the surface of the mechanical properties to meet the installation requirements;

from AKEN.ZHANG.senior manager of PCB manufacturer CHINA.

from AKEN.ZHANG,Senior manager of CHINA PCB manufacturer.

[email protected]

[akenpcb-blog]

(通过 https://www.youtube.com/watch?v=cw99k-nEKMQ)

[akenpcb-blog]

(通过 https://www.youtube.com/watch?v=PruS3CroOho)

[akenpcb-blog]

(通过 https://www.youtube.com/watch?v=UnGMixBX3qc)