SMT is abbreviation of surface mount technology and is currently the most popular technology and process in the electronics assembly industry. Surface Mount Technology (SMT) is called surface mount or surface mount technology. It is a method of mounting a leadless or short lead surface mount component (SMC/SMD for short)
Increased demand for high density, versatility, and miniaturization brings new challenges to packaging and substrates. Many new packaging technologies have emerged, including embedded packaging technology. Embedded packaging technology is to embed passive components such as resistors, capacitors, inductors and even active devices such as IC in printed circuit boards. This
Analysis of PCB failure phenomena
Incomplete statistics of the fault parts of the circuit board: The chip is damaged by 30%; the discrete element is damaged by 30%; the connection (PCB plate copper wire) breaks 30%; the program destroys or loses 10% (there is an upward trend).
It is known
Why some PCB solder service life is short? They are occured bad welding phenomenon after a period of time led the electric device bad.Today, let's analyze the main reasons.
PCB poor welding analysis:
PCB surface pad or SMT be oxidated lead to poor solder.
PCB has dusty or oily materials on
let's learn about the standard shortcomings of quality testing.
Serious shortcomings (in CR): any shortcoming enough to harm the human body or machine or to endanger the safety of life, such as unconformity / burning / electric shock, etc.
The main shortcomings (in MA): can cause damage to the product,
Some complex PCBs design be finished,you must take PCB to assembly plant when PCBs get back from PCB manufacturer.That assembly plant need you provide some necessary documents for production.Where the captain guy gave you talk about the PCB assembly when production of documents required,and what the representative of the file
