Basic inspection of PCB board
The quality of PCB directly affects the quality of the whole electronic products, PCB testing is a timely detection of problems, but also a necessary means to prevent more defective products to reduce losses.
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Discussion on metal substrate of PCB circuit board
There are three main types of metal substrate: aluminum substrate, copper substrate, iron substrate. Iron substrate is rarely used in the market, here the focus of analysis is aluminum substrate, copper substrate.
Color of circuit board
In order to prevent oxidation of copper layer in PCB board, separate welding and non-welding parts and protect PCB surface, the color of PCB board is also mainly determined by the color of solder resistance paint.
Selective welding of printed circuit board
In PCB proofing, temperature sensitive elements can limit the application of reflow soldering, whether in cartridge or SMD. Therefore, selective welding can be used after reflow welding in most applications.
What are the rules of industrial PCB circuit board maintenance?
Industrial circuit boards should pay attention to heat dissipation problems; The second is printed board copper foil line, poor quality circuit board power supply line copper foil is very thin, easy to burn due to the current.
PCB board welding requirements in PCBA processing
PCBA processing and welding process requirements for PCB board: 1. Heat resistance, 2. PCB shape, 3. PCB size, 5. PCB process edge, 6. PCB reference identification point, 7. Plate design, 8, can withstand solvent washing
PCBA board aging test standards and methods
pcba aging test standards: 1, low temperature work, 2, high temperature work, 3, high temperature and high humidity work
The basic principles of PCB circuit board design and wiring
Wiring is generally divided into three levels: one is the layout, which is the most basic requirements of PCB design, the second is to meet the electrical performance, which is the standard to measure whether the circuit board is qualified. Three is beaut
What specific measures should be implemented to produce high reliability PCB boards?
Whether in the manufacturing and assembly process or in actual use, PCB to have reliable performance, this is very important.
Why is it so difficult to make multilayer PCB board?
The high floor board uses high TG, high speed, high frequency, thick copper, thin dielectric layer and other special materials, which puts forward high requirements for the inner line fabrication and graphic size control.
7 commonly used PCB board detection methods
The purpose of testing PCB board is to find out the defects of PCB board and repair them to ensure the production quality of PCB board and improve the qualified rate of products.
PCB design company analyzes the role of matching resistance in PCB board design
PCB design impedance matching: PCB design impedance matching refers to a suitable collocation between the signal source or transmission line and the load. According to the access mode PCB design impedance matching has serial and parallel two ways; Accordi
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