Author: Grace

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Hot air leveling process exposed copper analysis
ByGrace November 25, 2024November 22, 2024
Hot air leveling involves immersing the printed circuit board in molten solder (63SN/37PB) and then blowing hot air over the surface of the printed circuit board and the excess solder in the metalized hole to obtain a smooth, uniform, and bright solder coating. Cladding. After the hot air leveling, the surface of the tin-alloy coating…
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Flexible CCL Application Note
ByGrace November 25, 2024November 22, 2024
First, protective coating of flexible copper clad laminate The protective cover is a permanent insulating film or a coating covering the conductor side of the flexible printed circuit (of course, no protective coating is required at the pad). This protective coating prevents the circuit from moisture, contamination and Other forms of damage, at the same…
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Problems with PCBs in PCB Design and Solutions
ByGrace November 25, 2024November 25, 2024
The following problems may be caused by the substrate in the PCB design process: First, all kinds of soldering problems Now symbol mega: cold solder joints or solder joints have blast holes. Inspection method: The hole is frequently dissected before dip soldering and after dip soldering to find out where the copper is stressed. In…
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Gold Plating Board Gold Plating Quality Problems and Measures
ByGrace November 25, 2024November 22, 2024
1. Reasons for the quality problems of gold plating 1.1 gold layer color is not normal The gold color of the connector is inconsistent with the color of the normal gold layer, or the color of the gold layer of different parts in the same accessory product is different. The reasons for this problem are:…
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PCB circuit anti-jamming measures
ByGrace November 25, 2024November 22, 2024
In the design of electronic systems, in order to avoid detours and save time, the requirements of anti-interference should be fully considered and satisfied, and remedial measures against interference should be avoided after the design is completed. There are three basic elements of interference: (1) Interference source refers to the component, device or signal that…
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uncategories | 370hr | automated electronics assembly | automated pcb assembly
Key Process Improvements for High-precision Printed Wiring Boards
ByGrace November 25, 2024November 25, 2024
With the development of the electronics industry, the degree of integration of electronic components is getting higher and lower, and the volume is getting smaller and smaller, and BGA type packages are generally used. Therefore, the PCB’s wiring will be smaller and smaller, with more and more layers. Reducing line width and line spacing is…
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Classification of electroplating process Process flow and description
ByGrace November 25, 2024November 22, 2024
1, Autoclave pressure cooker It is a kind of container filled with high-temperature saturated water vapor, which can apply high pressure. It can place laminated Laminates samples for a period of time to force water vapor into the plate and then remove the plate sample. Placed on a high-temperature molten tin surface, its “delamination-resistant” properties…
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Multilayer Laminating Process Glossary
ByGrace November 25, 2024November 22, 2024
1, Autoclave pressure cooker It is a kind of container filled with high-temperature saturated water vapor, which can apply high pressure. It can place laminated Laminates samples for a period of time to force water vapor into the plate and then remove the plate sample. Placed on a high-temperature molten tin surface, its “delamination-resistant” properties…
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Gold finger gold plating quality problems and measures
ByGrace November 25, 2024November 22, 2024
1 Introduction In connector plating, due to the high electrical performance requirements of the contact pairs, the gold plating process occupies a significant position in the connector plating. At present, except for some of the ribbon connectors using selective gold plating process, the rest of the needles The gold plating in the hole of the…
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PCB technology Electrolytic capacitors and capacitors
ByGrace November 25, 2024November 22, 2024
one. Fixed capacitor: refers to a capacitor whose capacitance cannot be changed once it is made. Capacitors can generally be divided into non-polar ordinary capacitors and polar electrolytic capacitors. Common capacitors are divided into fixed capacitors, semi-adjustable capacitors (trimming capacitors), and variable capacitors. 1. Classification of capacitors: Capacitors are generally classified by dielectric. 1) Paper-membrane…
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Key Process Improvements for High-precision Printed Wiring Boards
ByGrace November 25, 2024November 22, 2024
Six ways to reduce automotive PCB defect rate The automotive electronics market is the third largest application area for PCBs after computers and communications. With the traditional mechanical products of automobiles, they gradually evolved and developed into high-tech products that integrate intelligence, information, and mechatronics. Electronic technology has been widely used in automobiles, both as…
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PCB electrical measurement technology analysis
ByGrace November 25, 2024November 22, 2024
Hot Air Solder Leveling, also known as spray tinning, works by using hot air to remove excess solder from the surface of the printed board and holes. The remaining solder evenly covers the pads and the non-resistive solder lines and surface package points. Hot air leveling process is relatively simple, mainly: put plate (sticky gold…
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PCB electrical measurement technology analysis
ByGrace November 25, 2024November 22, 2024
First, electrical test PCBs in the production process, it is inevitable that due to external factors caused by short circuit, open circuit and leakage and other electrical defects, coupled with the continuous evolution of PCB to high density, fine pitch and multi-level evolution, if not in time to bad board Screening out, and letting it…
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Detailed PCB layout technology
ByGrace November 25, 2024November 22, 2024
First: Early preparations. This includes preparing component libraries and schematics. “If a worker wants to do something good, he must first sharpen his tools.” To make a good board, in addition to designing principles, he must paint well. Before doing PCB design, we must first prepare the schematic SCH’s component library and PCB’s component library….
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Drilling and Etching For Rigid-Flex PCB
ByGrace November 25, 2024November 22, 2024
Drilling and etchback are an important procedure before electroless copper plating or direct copper plating on a rigid-flexible printed circuit board after CNC drilling. In order to rigidly print a printed circuit board to achieve reliable electrical interconnection, it must be combined with The special printed circuit boards special material composition is suitable for the…
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