KnownPCB provides one stop service from PCB design,PCB fabrication,components sourcing and PCB Assembly including functional test.
Quality is the lifeblood of the company. A full set of the latest production equipment, testing equipment and clean workshop from abroad have been introduced to KnownPCB to improve the updating technical and outstanding quality requirement.
Our products are widely used in communication equipment, industrial control, electrical energy, medical equipment, automotive electronics, intelligent security, consumer electronics, aerospace and other fields.
Thanks to our worldwide clients’support in more than 15 years, KNOWNPCB has established a flexible system platform to enable us develope well and better benefit our clients.
Founded in 2008
More than 800 employees
More than 80000sqm factory size
More than 4,000 famous
Total investment of
RMB 200 million
Our sales and engineers work as three shift to give 24 hours support to different time zone customers
We have more than 15 years' experience working on oversea projects
We manufacture all standard orders in house without outsourcing so we can offer you an extremely competitive price.
We will respond to your enquiries within 2 hours
We accept small quantity & large-scale order started from 1pcs
We offer flexible payment terms from T/T, L/C, Paypal, Western Union to assist your business
1. Temperature of soldering iron SMT tends to work at a temperature equivalent to that of a hot soldering iron (approximately 375 ℃), making things faster and requiring fine-grained IC welding techniques to work below. The actual temperature setting will vary for different irons, but it may range from 330 ° C/626 ° F to 380 ° C/716 ° F (although some inexpensive temperature controlled soldering irons may not have accurate temperature settings if they do not work well, so try to be higher). Most modern components have a considerable amount of elasticity and are designed to handle automatic welding and lead-free solder, but even at these high temperatures, it is best not to leave contact with the iron for too long, 2. Solder 0805 chip resistors and capacitors Apply flux to both pads. Use tweezers and/or tips to achieve the position of the component. Load some solder onto the soldering iron head. At the same time, use a tip to keep the component in place, and touch the soldering
As a provider of electrical connections for electronic components, PCB is known as the "mother of electronic products". It is understood that each electronic product requires customized circuit boards, which means that no matter how the electronic industry's products are upgraded, there will be a continuous demand for circuit board copying. In addition to imitating and cloning existing circuit boards, PCB copying can also improve existing technology and accelerate the upgrading and upgrading of electronic products. Therefore, we can also say that the PCB copying industry is a very active industry in the electronic component industry. From the perspective of industry division, PCB copying is undoubtedly a segmented and special industry, and its industry characteristics determine that PCB copying enterprises have their own business characteristics. Currently, with electronic component products becoming increasingly miniaturized and complex, global PCB copying manufacturers are facing
1： Establish encapsulation that is not present in the encapsulation library. Before designing the PCB board sample diagram, if a certain component in the schematic diagram cannot find a packaging model in the packaging library, it is necessary to use the component packaging model editor to create a new one. It is necessary to ensure that the packaging model of the used component is complete in the packaging library (which can be multiple library files) to ensure the smooth progress of PCB design. 2： Set PCB board design parameters. According to the needs of circuit system design, set the number of layers, size, color, etc. of the PCB board. 3： Load network table. Load the network table generated from the schematic diagram and automatically load the component packaging model into the PCB design window. 4： Layout. A combination of automatic and manual layout methods can be used to place the component packaging model in an appropriate position within the PCB planning range, making
1： The distance from the edge of the circuit board is generally not less than 2MM. The shape of the circuit board is rectangular, and the aspect ratio is 3:2 or 4:3. When the surface size of the circuit board is greater than 200MM by 150MM, the mechanical strength that the circuit board can withstand should be considered. 2： In general, all components should be arranged on the same side of the circuit board. Only when the top layer components are too dense can some highly limited and low heat generating devices, such as SMD resistors, capacitors, ICs, etc., be placed on the lower layer. 3： The minimum spacing between adjacent solder pads of different components on the PCB sample circuit board should be at least 1MM. 4： On the premise of ensuring electrical performance, components should be placed on a grid and arranged parallel or perpendicular to each other, in order to be neat and beautiful. In general, components are not allowed to overlap; The arrangement of components shoul