1, one of the leading enterprises in the Apple concept stock, the company under the technological innovation and development of Apple Inc., products cover a number of market segments, and actively expand the global business. The company has strong research and development strength and supply chain advantages, maintaining good profitability and stable growth. Total electroacoustic:As one of Apple's suppliers, the company provides micro microphones for Apple's iPad, iPhone and other products.
2, Apple industrial chain concept stock leader list [1] Ring Xu Electronics 601231: The company is one of the few suppliers of Apple's wireless communication module, the company's SiP product line started from the Wifi module, accounting for about 45% of Apple's iPhone and iPad procurement. [2] Total Radio 002655: Through the cooperation with MWM, the company successfully entered the list of Apple's suppliers, providing Apple's ipad, iphone and other products with micro microphonePainting, final assembly of four processes and the production of fuel tank products. The 12th Division: BYD Auto Mold Center, responsible for the design and manufacturing of the company's new model molds, inspection tools and fixtures.
Shenzhen BYD has several business divisions, each focusing on a different business area. First of all, BYD's automotive division is one of its most important departments, responsible for the development, production and sales of BYD cars. This includes BYD's various electric models, such as BYD Qin, BYD Tang and others.
The first division, specializing in the production of 3C product structural parts, including metal and glassShells, and chargers, etc. The second division, specializing in the development and production of 3C batteries and power batteries, provides key energy solutions for the industry. The third division focuses on the manufacture of high-quality plastic shells to ensure the durability of products. The fifth division is dedicated to mobile phone ODM business, providing customized mobile phone design and assembly services.
The first division: nickel-cadmium/nickel-metal hydride rechargeable batteries, flexible printed circuit boards, mobile phone chargers, etc. The second division: lithium particle rechargeable batteries, basically mobile phone rechargeable batteries, the main customers are Nokia, MOTOROLA. The third division: spin-off and listedThe main body of BYD Electronics; The main products are mobile phone cases and mobile phone buttons, and the main customers are Nokia, MOTO, SONY Ericsson and so on. The fourth division: LCD manufacturing, backlight manufacturing, etc.
In Shenzhen, BYD's business territory is extensive, especially in the 19 business units in Baolong, Kwai Chung, Ping Shan, each performing its own duties. Among them, the welding department and assembly group of the 11th Division located in Pingshan focus on the research and development, production and assembly of auto parts to ensure that every process is rigorous and professional.
Shenzhen BYD (including Baolong, Kwai Chung, Pingshan) has 19 business divisions,The functions of each business division are as follows: The first business division: research and development, production and assembly of nickel batteries, new material batteries, mobile phone parts, auto parts and other IT products. The second division: lithium particle rechargeable batteries, mainly used in mobile phones, cordless phones, notebooks, digital products.
1, solder paste leakage caused by SMT process factors Wireless charging smt; Insufficient amount of solder paste coating; Steel mesh NoneLine charge smt, aging, poor leakage. Solder PCB pad oxidation caused by PCB factors wireless charging smt, poor weldability; There are through holes in the pad.
2, the causes and solutions of virtual welding are generally as follows: 1. Insufficient tin printing, resulting in virtual welding -- Increase the amount of tin printing, you can reaming or thickening the steel mesh 2. Poor solderability of parts leads to poor tinning - it can be improved by adjusting the furnace temperature, and the thorough way is to replace components 3. Poor furnace temperature curve, such as low temperature orConstant temperature time is not enough -- adjust the furnace temperature curve 4.
3. Virtual welding is that there is no firm connection between the SMT patch components and the pad. Possible causes include poor weldability of components and pads, improper reflow temperature control, printing parameter errors, or decreased solder paste activity. To improve this problem, it is necessary to improve the screening standards of PCB circuit boards and components to ensure welding performance; Adjust the reflow temperature curve, optimize the printing process, ensure the solder paste in time and overreflow.
4, c, furnace temperature: temperature reflux time does not meet the recommended standard, for example: due to welding temperatureInsufficient and insufficient time, resulting in the solder joint surface bright, everything seems to be good, but the fact that the solder joint inside is virtual welding, its solder foot inside the tin into gray, such a phenomenon is that the tin is not completely melted, can not make the solder pad, solder paste, pin co-melting.
5, offset is mainly related to NC, part identification parameters, mount height; The tin is mainly because the solder paste is too thick, the steel mesh is not clean, and sometimes the parts are attached wrong, which will also lead to the tin. The main reasons for false welding are: uneven parts paste before furnace, piped-up, or parts themselves have been deformed, printing less tin will also lead to virtual welding, solder paste stirring uneven, not thawedTo a certain temperature, usually 20 to 26 degrees Celsius.
6, SMT casting is generally related to the vacuum system of the machine, the maintenance of the suction nozzle, the control of the solenoid valve, and the feeding accuracy of the incoming material, and the basic proportion is relatively large because of the first three. SMT fly is generally related to the vacuum system of the machine, the maintenance of the nozzle, the control solenoid valve, the feeding accuracy of the feeder, and may also be related to the identification system of the machine, the mounting position, the distribution of the board and the thimble, and the size of the board.
1, assembly and detail processing Assembly coil is the key step Wireless charge smt, Wireless charge smt I have provided a detailed outline of the coil. DXF file, step by step teach wireless charging smt you how to print, cut anti-interference tiles, and then the wireless transmitter coil perfectly embedded. The shell cut part, which I used as inspiration for Coke cans, shows how to benefitTransformation with 3D printing technology, the fine operation in the grinding process is also shared.
2, the second point, the charging time is too long wireless charging smt; Under normal circumstances, the charging treasure can be filled with 2 to 3 hours, like this giant charging treasure, it takes at least two to three days to charge a charge, the charging time is so long, it is better to charge yourself directly at home. Therefore, such a bullshit and useless invention completely deviates from the essence of the charging treasure. If you use it, you're paying an IQ tax.
3, manual Geng self-made chargingTreasure may be put into production Wireless charging smt? In the video of Manual Geng, you can see that the charging treasure made by manual Geng can be used outdoors. And the power bank, handmade by Geng, can power a running TV. In addition, this charging bank can also power a washing machine, and can ensure the continuous operation of the washing machine.
4, manual Geng this production of large charging treasure is purchased similar to the battery flat type large battery pack, and then modified, and the external frame and input access and output interface, soThen it forms a power bank.
5. Yes. However, the larger the capacity of the charging bank, the larger the volume and weight, and the more inconvenient it is to carry. Like anything else, it just works. I made a wallet charging bank, capacity 6000 mah, weight less than 120 grams. Enough to fully charge your phone.
From the perspective of the development cycle of the industry itself, although China's SMT industry is still in the early stage of development, it has shown a vigorous vitality. At the same time, SMT industry isAs an important basic industry, it is of great significance to promote the structural adjustment and industrial upgrading of China's electronic information industry and manufacturing industry. Promoting the rapid and healthy development of China's SMT industry requires the cooperation of all aspects of the industry upstream and downstream.
Intelligent brain: chip is the soul of SMT, including microprocessor, dealing with complex data operation; Memory, is the warehouse of information; Amplifiers, amplifying weak signals; Sensors, sensing changes in the world, drive technological progress everywhere. Packaging art: A variety of packaging forms protect electronic components from environmental impacts and ensure stable performanceIt is the perfect integration of aesthetics and function in electronic product design.
The advantage of the needle bed type online tester is that the test speed is fast, and it is suitable for the test of the large-scale production of a single variety of civil household appliance circuit board, and the host price is cheaper.
1, the rated energy of the charging bank does not exceed 100Wh Wireless charging smt, without the approval of the airline. Rated energy exceeding 100Wh but not exceeding 160Wh, by airIt can be carried only after the approval of the department, but each passenger shall not carry more than two charging banks. It is strictly prohibited to carry a charging bank with rated energy exceeding 160Wh wireless charging smt. It is strictly prohibited to carry a charging bank that does not indicate the rated energy and fails to pass the marked wireless charging smt parameter calculation to obtain the rated energy.
2, that is, as long as the charging bank is not higher than 20000mAh and 5V, it can be carried on board, and each person can carry up to two pieces. Not consigned.
3, not superOver 100Wh. The Announcement on the Provisions of Civil Aviation Passengers Carrying "Charging treasure" on Board (hereinafter referred to as the "Announcement") stipulates that when passengers carry charging treasure on board, the rated energy of the charging treasure shall not exceed 100Wh (watt-hour), without the approval of the airline. Rated energy exceeding 100Wh but not exceeding 160Wh can only be carried with the approval of the airline, but no more than two power banks can be carried by each passenger.
4, as long as the capacity of 100Wh but not more than 160Wh charging bank can be carried on the plane. Lithium batteries exceeding 160Wh are strictly prohibited. Can be taken back by a escort, transacting temporary business. Do not use power banks to charge electronic devices during flight. For a power bank with a start switch, the power bank should always be turned off during flight.
5, on domestic flights, China's Civil Aviation Administration currently stipulates that the rated energy of the charger does not exceed 100Wh, without the approval of the airline; The maximum of 160Wh can be carried after the approval of the aerospace company, and the approximate capacity of the charging bank can be carried below 27000mAh after conversion.