1、 Red gum Red glue is a polyolefin compound, which is easy to solidify after heating. When its temperature reaches the freezing point of 150 ℃, red glue begins to change from paste to solid. Using this characteristic, patch components can be fixed by dispensing or printing, and circuit board components can be heated and [...]
After the wiring of the circuit board is completed, the planning rules of the circuit board shall be checked to ensure that the circuit board meets the planning requirements and all networks have been correctly connected. The inspection items commonly used in planning rule inspection are as follows: Places where PCB wiring needs to be [...]
Under a certain temperature and humidity environment and potential difference, electrochemical migration is easy to occur between adjacent lines and solder joints, resulting in insulation failure. In the case of serious dust pollution, the deposition of dust particles in electronic equipment changes the critical humidity on the surface of circuit board, thus changing the failure [...]
Circuit board gold-plated board and circuit board gold-plated board are commonly used in circuit board production. With the increasing integration of IC, the IC pins are more and more dense. The vertical tin spraying process is difficult to flatten the fine pad, which brings difficulty to SMT mounting; In addition, the standby life of tin [...]
The process of PCB board copying is to realize the rapid update, upgrading and secondary development of various electronic products by extracting some modifications and modifications in the technical data files. According to the document drawings and schematic diagrams extracted from board copying, upgrading and optimization can be carried out! What are the reverse steps [...]
Flexible circuit board cutting equipment is the main machine for FPC board processing. It mainly uses ultraviolet laser as the light source for cutting. It irradiates the material surface through high-energy laser beam to make it gasify and fuse to form cutting. Its following four characteristics solve the main processing difficulties of FPC board. Improve [...]
Why is laser equipment the Savior of PCB processing industry? Circuit board is an indispensable part of 3C industry. It is an important component carrier and line connection carrier. In this era of rapid development, efficiency has become particularly important. In industrial manufacturing, laser cutting machine has undoubtedly become the representative of efficient tools. China's [...]
As a bridge carrying electronic components and connecting circuits, circuit board is the basic component of almost all electronic products and plays a key role in the quality and performance of electronic products. Electronic circuit board is also developing steadily in the demand of the rapid development of domestic electronic equipment. So what problems will [...]
Circuit board can also be called printed circuit board or printed circuit board. The function of circuit board is to miniaturize and visualize the circuit, and plays an important role in the mass production of fixed circuit and optimizing the layout of electrical appliances. So how do circuit boards look at the direction of the [...]
1、 Foreword In PCB design, crosstalk generated by strong interference signal lines and signal lines sensitive to interference will exist between routing lines. This adverse effect is not only related to clock or periodic signals, but also affects other important routing, data lines, address lines, control lines and IO in the system. Most of the [...]