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) Matching of expansion and contraction coefficients Generally, circuit boards are designed with a large area of copper foil for grounding purposes, and sometimes the Vcc layer also has a large area of copper foil. When these large areas of copper foil cannot be evenly distributed on the same circuit board, it will cause uneven heat absorption and dissipation speed. Of course, circuit boards will also expand and shrink, but if the expansion and contraction cannot match, it will cause different stress changes and ultimately deformation, At this point, if the temperature of the board has reached the Tg value, the board will begin to soften and become permanently deformed after curing. (2) The connection points (vias, vias) of each layer on the circuit board limit the expansion and contraction of the board Nowadays, most circuit boards are multi-layer boards, and there are connection points (through holes, blind holes, buried holes) between layers that are like rivets. In places wh
The hole in the pad refers to the hole punched on the pad, which is an SMD pad, usually referring to SMD and BGA pads of 0603 and above, commonly referred to as VIP (via in pad). The solder pad of the plug-in hole cannot be referred to as an in tray hole, as the plug-in hole solder pad requires the insertion of components for welding, and all plug-in pin solder pads have holes. With the development of electronic products in the direction of light, thin, and small, PCB boards have also been pushed towards high-density and difficult development, so the volume of components is gradually decreasing. For example, if the packaging of BGA components is small, the spacing between pins will decrease accordingly. If the pin spacing is small, it is difficult to wire the pins inside the package, and it is necessary to change layers and punch holes for wiring. When the spacing between BGA pins is small and cannot be fanout, there is only one solution, which is to drill holes in the tray. Ther
From PCB circuit board design to the completion of all component welding to a high-quality circuit board, it requires strict control from PCB design engineers, as well as the level of welding processes and workers. There are mainly the following factors: PCB board drawing, circuit board workmanship quality, device quality, oxidation degree of device pins, solder paste quality, printing quality of solder paste, accuracy of program programming of the SMT machine, mounting quality of the SMT machine, setting of temperature curve of the reflow soldering furnace, and other factors that may affect poor PCB soldering. The process of PCB drawing is an insurmountable part of the PCB chip welding factory itself. Due to the fact that circuit designers often do not solder circuit boards, they cannot gain direct welding experience and are unaware of the various factors that affect welding; The workers in the welding factory do not understand the drawing board, they only focus on completing pro
Why sometimes, even though the PCB design has not been checked for errors, there are still adverse situations such as short circuits and broken boards after production and processing? That's because you didn't consider the issue of hole spacing, which resulted in unavoidable losses during the assembly process. The production of a single or double-sided PCB panel involves drilling non through holes or through holes directly after cutting; The multi-layer board is drilled after completing the pressing plate. Drilling can be divided into: part holes, tool holes, through holes, blind holes, and buried holes according to their functions. Conventional drilling is processed through drilling machinery, and in actual processing, the spacing between drilling holes usually affects the processing of the drilling rig and the reliability of the finished product. So when designing, it is important to consider the actual machining situation of hole spacing: VIA via (commonly known as conductiv