Copper foil: a negative electrolytic material, a thin continuous metal foil deposited on the base layer of the circuit board, which ACTS as the conductor of PCB. It is easy to adhere to the insulation layer, receive printing protection, corrosion after the formation of circuit patterns. Copper mirror test: a flux corrosion test using a [...]
The heat generated by the working of electronic equipment rapidly increases the internal temperature of the equipment. If the heat is not released in time, the equipment will continue to heat up, and the device will fail due to overheating, and the reliability of electronic equipment will decline. Therefore, it is very important to heat [...]
The disassembled waste printed circuit board is mainly composed of reinforced resin board and copper wire attached to it, with complex connection mode, high hardness and strong toughness. It is difficult to use a single crushing equipment for energy consumption, and there is no good balance between crushing efficiency and crushing effect. Therefore, two-stage crushing [...]
Multilayer circuit board processing technology is subdivided into many types of technology, we will introduce the multilayer circuit board processing technology types: Surface technology: hot air leveling (HAL), gold finger, Lead free spraying (Lead free), chemical (precipitation) gold, silver/tin, OSP, rosin treatment, etc. ● reliability test: open/short circuit test, impedance test, weldability test, thermal shock [...]
Connecting bridge phenomenon (2) the width of process edge shall be ≥10mm and the whole layer shall be laid out with copper (3) no more than 2 rows can be excluded from the Mosaic. (4) if connecting bridge cannot be used directly between sub-plates, excessive connecting strip/fast connecting strip must be adopted. It is recommended [...]
How are the components connected to each other on the circuit board? 1. Complexity: the bread board only needs wires and components to be plugged in. The operation is complicated, the circuit is chaotic and prone to errors 2. Connection mode: bread board is a connector circuit, PCB is a welding circuit, the former is [...]
With the rapid development of the electrical and electronic industry, various kinds of waste circuit boards form in large quantities, endangering the natural environment. What is more serious is that the waste electronic products in China have not yet been disposed on a scale, and the use value of its comprehensive reuse has gradually been [...]
There are more than 40 kinds of metal welding methods, which are mainly divided into three categories: welding, pressure welding and brazing. Fusion welding is in the welding process of the workpiece interface heating to the melting state, no pressure to complete the welding method. When welding, the heat source will rapidly heat the interface [...]
With the increasing competition in PCB industry, quality management is becoming the focus of PCB factory management. To do a good job in FPC flexible circuit board production process quality management and control is the fundamental to eliminate the source of manufacturing defects. "Quality is dry out, not check out" this is often called circuit [...]
Method 1: 1. Cut the copper clad plate into the size required by the circuit diagram. 2. Put the wax paper on the steel plate, use a pen to carve the circuit diagram on the wax paper according to 1:1, and cut the circuit diagram on the wax paper according to the circuit board size, [...]