Posts Tagged ‘printed circuit board’

The Harms and Solutions of Fingerprint on PCB

Wednesday, January 23rd, 2019

The fingerprint is one of the major disasters of PCB and it will also cause the poor products of PCB as well as deterioration of terminal user reliability. However, the manual operation will go through every step of printed circuit board manufacturing. Only every operator forms a good habit and stop touch the PCB with bare-hands, so that can reduce the fingerprint doing the harms to PCBs. As the professional PCB vendor, BEST would like to let you know more details of the harms and provide some solutions for you.

Do not Touch the PCB with bare hands

Do not Touch the PCB with bare hands

The Harms of Fingerprint on PCB
A. If the bare-hands touch the printed circuit board directly, it will result in oxidization of copper. After plating, the fingerprint will appear obviously. The outline of the board will be seriously poor if the plating layer is not flat.
B. Toughing the printed circuit board with bare hands before solder mask, it will decrease the adhesion of the green oil and the green oil will peel off because there are bubbles during HAL (Hot Air Leveling).


C. Touching the PCB after solder mask until package with bare hands will cause unclean surface of boards and poor soldering.
D. There is fingerprint with grease when print wet film or silk screen, it is easy to cause the adhesion of the dry or wet film to decrease, causing the separation of cementation and plating layer during plating.
Solutions
A.It is required to develop a good habit about fetching and putting the PCB.
B.It must wear gloves when touch the printed circuit board.
C.Setting an example and keeping the rule of in mind–do not touch the board with bare hands.
Best Technology is the premier expert in PCB manufacture of electronics, brings a unique combination of technology and quality that offers a competitive supply of printed circuit board and PCBA. With high qualified engineers, we are able to help you find a PCB with high quality. To find out more, contact Best Technology at 0755-29091601 or check the website: https://www.bestpcbs.com/

5 Views on Explaining Why the PCB Is Green

Wednesday, January 2nd, 2019

At the first sight, you will see that there is a layer of green oil on the PCB. It is called solder mask which is comprised of resin, talc and pigment. Of course, solder mask also has other colors, including red, yellow, black and so on, but green is the one that used the most widely.

When it comes to the question like that “Why are the most of printed circuit boards are green?”, the engineers from Best Technology with rich experience gave 5 points to explain it:

1. There PCB is required to go through the exposure room with yellow light in some processes of fabrication and the visual effective in exposure room is better than the solder mask with other colors.

What’s more, the PCB needs to coat tin, SMT and AOI testing during SMT soldering. All of these processes require optical position alignment and the green solder mask is better for the recognition of instruments.

PCB with green solder mask

PCB with green solder mask

2. Before the flying probe testing is applied widely, most of the wires on the PCB are relied on the naked eyes to inspect.It is very tired to detect the boards in strong light. If the rigid board is green, it will not do a lot harms to eyes.

3. There are cobalt and carbon in  blue and black solder mask,which have a certain conductivity, so there is a risk of short circuit. However, the PCB with green oil will be more friendly to the environment. Because it will not release poisonous gases when use the printed circuit board in a high temperature environment.

printed circuit board with green solder mask

printed circuit board with green solder mask

4. Since some famous brands began to use black solder mask in 2007, such as ASUS and Micro-Star and then people kept an eye on the colors of PCB.In this way, people gradually believe that PCBs with black solder mask means that the boards have high quality.After that, more and more PCB manufacturers started to apply black solder mask. NO one said that printed circuit boards with black solder mask are better than those with green solder mask.It is entirely due to the misleading caused by the famous brands using black solder mask to identify product positioning.

5. There is no reason, just because of habit, so it has been used all the time.

Best Technology is the premier expert in PCB manufacture of electronics, brings a unique combination of technology and quality that offers a competitive supply of printed circuit board and PCBA. With high qualified engineers, we are able to help you find a PCB with high quality. To find out more, contact Best Technology at 0755-29091601 or check the website: https://www.bestpcbs.com/

Superfast Internet 5G Brings Endless Possibilities for PCB

Wednesday, December 26th, 2018

Every day you can read about 5G in the news and it brings superfast Internet for daily life. Recently, China Mobile took the lead in opening a 4.9GHz 5G base station in Beijing. It is reported that the base station is located in the CBD (Central Business District) of Beijing, and the single-user download rate can be as high as 2.8 Gbps. The base station adopts Huawei’s 64T64R AAU5913, and the frequency bandwidth is up to 100MHZ, which can maximize the use of the current website to cover both 4G and 5G sites.

China Mobile opening the 4.9GHz 5G base station in Beijing will accelerate the development of 4.9GHz 5G in industrial chain. Meanwhile, it also brings endless possibilities for fields, including smart traffic, smart city, UHD (Ultra High Definition Video) etc..

 

8L HDI PCB

8L HDI PCB

Accelerating the application of 5G not only facilitates the development of above fields, but also opens up a lot of possibilities for printed circuit board. The building of base stations will need many PCBs with high frequency and high speed.

Best Technology is the premier expert in manufacture of PCB and PCBA. Our PCB designers are highly qualified and experienced and can give you a competitive supply of printed circuit board. To learn more, contact us at 0755-29091601 or check our website: https://www.bestpcbs.com/

Outlook of Headphone, Outlook of Wearable Devices

Wednesday, December 19th, 2018

People always find ways to decorate the electronic products those have been accompanied with them for a long time. Change a phone cover according to the dressing style or change a watch strap with different colors for Apple Watch. It seems that the technology devices have already become our accessories.

It has been a long time that technology combined with fashion. After all, a word “techno-fashion” became prevailing at the very beginning of 20th century. Therefore, we are able to see that Nike & Adidas do the same thing as a technology company — developing their new shoes. Meanwhile, Apple and Hermes launched Apple Watch to enter the luxury market.

It might be not very significant to say using technology to set off fashion or using fashion to set off technology, especially the wearable devices have begun to blend with daily dressing. And we have to admit that the headphone is the darling in the fashion crowds.

A number of NBA starts wore Beats to enter the field at the opening ceremony of 2008 Olympic Games. Since then, Beats headphone has become a fashion item favored by many stars and it can be seem in the street shoots or portraits of stars such as Lady Gaga, Justin Bieber, GD etc..

NBA's star wear Beats headphone in training

NBA’s star wear Beats headphone in training

Super model Cara wear Beast in street shoot

Super model Cara wear Beast in street shoot

Driven by Beast, headphone has become a fashion trend for many luxury brands. For example, the controversial fashion brand D&G launched their luxury headphone on the fashion show some time ago.

luxury headphone from D&G

luxury headphone from D&G

A lot of KOLs on Instagram are also fond of to show their own photos wearing AirPods. It seems like that AirPods has been their new earrings.

Some people hold that AirPods will be more easier to match their suits. A young man wore AirPods for his interview and he said that it was more fashionable. After all, advance technology is always more fashionable.

A young man and AirPods

A young man and AirPods

It is well known that headphone is a little gadget with small volume. Therefore, one of  the biggest challenges to make headphone integrates with wearable devices is that whether the components are small enough. For example, whether the printed circuit board are small enough to fit into the headphones.

Best Technology, a professional PCB solution provider, is always dedicated to catch up with times. Our unique technology and high quality products will give you a competitive supply of printed circuit board and rigid-flex circuit board and make your wearable devices more excellent. To learn more, contact us at 0755-29091601 or check our website: https://www.bestpcbs.com