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Analysis of two kinds of PCB process faults: debris on hole wall and enlarged hole diameter

PCB process failure: debris appears on the hole wall. Reason: (1) the material of cover plate or base plate is inappropriate. (2) The cover plate causes the bit damage. (3) The vacuum pressure of the spring central head of the fixed drill bit is insufficient. (4) The pressure foot gas supply pipeline is blocked. (5) […]

An indispensable device for PCB anti-static design: TVS tube

What you must know about ESD as a PCB LAYOUT engineer. TVS tube is widely used in practical PCB design. Silicon transient voltage absorption diode has extremely fast response time (sub-nanosecond level), quite high surge absorption capacity, and many voltage grades. It can be used to protect equipment or circuits from static electricity, transient voltage […]

Hardware structure design of numerical control device on PCB

Numerical control device is the core of the whole numerical control system, and its hardware structure can be divided into big plate structure and functional module structure according to the plug-in mode of PCB in CNC device. (1) CNC device with large plate structure can be composed of main circuit board, position control board, PLC […]

Transient conductivity resistance of PCB and electromagnetic radiation resistance of PCB

The purpose of this test is to verify the resistance to electrostatic discharge (ESD) caused by the approach or contact of objects or people or devices. Or people’s interior can accumulate electrostatic charges higher than 15kv voltage. Experience shows that many unexplained failures and damages are probably caused by ESD. Through discharging from the ESD […]

Production process of electronic circuit board –SMT process

With the development trend of miniaturization and thinness of electronic products, many circuit boards in electronic products now adopt SMT manufacturing technology, that is, surface mount technology, that is, all electronic components are attached to the surface of circuit boards. There is no need to insert it through the reserved via hole on the circuit […]

Brief introduction of PCB rivet technology

The increasing importance of laminating and laminating technology in all of these industries, including PCB, is increasing rapidly. In order to prevent quality problems, such as dislocation, during lamination, it is usually required to integrate PCB manufacturing processes before lamination. Compared with traditional fusion technology, modern fusion technology has the advantages of high efficiency, easy […]

Design criteria of motor outsourcing PCB

PCB Design Goal of DC Motor Drive Circuit In the design of DC motor drive circuit, the following points should be considered: 1. Function: Does the motor rotate unidirectionally or bidirectionally? Don’t need speed regulation? For unidirectional motor drive, only a high-power triode or FET or relay can directly drive the motor. When the motor […]

Processing technology requirements of PCBA patch for power board

Pcb circuit boards that provide power supply are almost all called power boards, and power boards are machine boards that mainly deal with power supply initiating functions. The smt process flow of power board can be basically divided into three processes: automatic mounting of SMT components, wave soldering plug-in, and manual operation. Then, what are […]

How to correctly select PCBA processing technology for processing circuit board

Now there are more and more electronic devices, and many things are developing in the direction of intelligence, which requires more circuit boards to undertake the control systems of these devices. Here’s how to choose PCBA processing technology for circuit board processing. How to correctly select PCBA processing technology for processing circuit board 1. single-sided […]

Component placement strategy in multilayer PCB system

There is a limit to how many circuits can be installed on a board. For the sake of manufacturing equipment and standard panel size, PCB itself has an upper size limit. The number of transistors on a device continues to expand, while resistors and capacitors almost disappear to the naked eye. Even with all integration […]