Chemical copper deposition is a very important step in the metallization process of PCB holes. Its purpose is to form a very thin conductive copper layer on the hole wall and copper surface, which is ready for electroplating later. And hole wall coating hole is one of the common defects of PCB hole metallization, easy … Continued
With the development of electronic information technology, more and more fields use multi-layer PCB boards.Traditionally, we define PCB boards with more than 4 layers as “multilayer PCB boards“, and more than 10 layers as “high multi-layer PCB boards“. Whether it can produce high-level multi-layer PCB boards is an important indicator to measure the strength of … Continued
Fault characteristics and maintenance of capacitor damage of industrial control circuit board The failure caused by capacitor damage is the highest in electronic equipment, especially electrolytic capacitor damage is the most common. Capacitors play different roles in circuits and cause different faults. In the industrial control circuit board, the digital circuit accounts for the vast … Continued
Printed circuit board, PCB will appear in almost every electronic device. If there are electronic parts in a device, they are all mounted on PCBs of various sizes. The main function of the PCB is to provide the mutual electrical connection of the various parts above. As electronic devices become more and more complex, more … Continued
PCB board surface treatment Oxidation resistance, tin spraying, lead-free tin spraying, gold sinking, tin sinking, silver sinking, hard gold plating, whole plate gold plating, gold finger, nickel palladium OSP: lower cost, good solderability, harsh storage conditions, short time, environmental protection process, good welding, smooth.Tin: Tinjet board is usually a multi-layer (4-46 layer) high-precision PCB sample, … Continued
Printed circuit boards are basically present in electronic devices also known as printed circuit boards. This green circuit board made of precious metal connects all the electrical parts of the device so that it functions properly. Without a PCB, an electronic device cannot work. A PCB schematic is a simple two-dimensional circuit design that shows … Continued
PCB design is an important link before PCB circuit board production. So, what is the PCB design process? First: pre-preparation. Prepare component libraries and schematics. First, prepare the component library of the schematic SCH and the component library of the PCB. The component library can use the library that comes with peotel, it is best … Continued
In the PCB electroplating process, there is often a bad phenomenon of spraying paint on the coating, which is due to oil pollution on the surface after electroplating, resulting in poor adhesion. However, when electroplating parts, there are often pinholes after plating. Today, sayfu talk about pinholes and treatment solutions caused by improper pretreatment. FAQ … Continued
Soldermask is a protective layer of liquid photo image able lacquer applied on the top and bottom side of a Printed Circuit Board. The function of the Soldermask is to protect the copper, apart from the solder pads, from:OxidationCreating shorts duringSoldering (bridges)Operation due to external conductive influencesOperation from net to net due to high Voltage … Continued
Circuit board warpage will cause inaccurate positioning of components; When the board is bent on SMT and THT, the pins of components are not perfect, which will bring many difficulties to assembly and installation. Ipc-6012, SMB–SMT circuit board of the maximum warpage or distortion 0.75%, other board warpage is generally not more than 1.5%; Electronic … Continued
Via-connection channel of double-layer board This is the most confusing part before. When you get a PCB, you will find that there are many small holes with the size of the needle tip. This is the via. Its structure is as follows. The function of the vias is mainly to connect the copper wires on … Continued
Copper Clad Laminate grades FR-4 A1 grade copper clad plate this grade is mainly used in military, communications, computers, digital circuits, industrial instruments, automobile circuits and other electronic products. The quality of this series of products has reached the world first-class level, which is the highest grade and best performance products of our company. FR-4 … Continued