sales@ipcb.com
Many people don't know what common components on a pcba are.
There are many kinds of electronic components, PCBA, covers many key circuit board components, and constitutes the core of PCBA.
Printed Circuit Board
First of all, PCBA is based on printed circuit board (PWB or PCB). It is composed of one or more insulating layers.
Conductive lines are laid on the PCB board to connect various electronic components. Its quality and design are crucial to the performance of the entire PCBA.
There are many parts on the circuit board, including circuit board parts, connectors, and other critical components. The specific component information is as follows:
Electronic components
It is a functional component of PCBA, including capacitors, resistors, inductors, transistors, integrated circuits (ICs) and other widely used components.
These components play different roles in PCBA and work together to achieve specific functions.
1) Capacitors
Capacitors are components that store charge and electrical energy, and have the characteristics of isolating DC and passing AC. In PCBA, capacitors are often used in filtering, coupling, bypassing and other circuits to improve the performance and stability of the circuit.
2) Resistors
PCB resistors are one of the most commonly used electronic components in PCBA, which play the role of limiting the current in the circuit.
According to different materials, structures, and resistance values, resistors can be divided into fixed resistors, variable resistors, special resistors, etc.
Resistors are widely used in various circuits, such as power supplies, amplifiers, signal processing circuits, etc., to achieve current regulation and control.
common compenents on a pcba
3) Inductors
Inductors, also known as induction coils, have the function of storing magnetic energy. In circuits, inductors can prevent current changes and stabilize current. Inductors are widely used in power supply filtering and signal processing.
4) Integrated Circuits
Integrated Circuits integrate multiple electronic components on a chip, with the advantages of small size, low power consumption, and stable performance.
In PCBA, integrated circuit components are essential for realizing various complex functions, such as digital signal processing, analog signal processing, communication interfaces, etc.
Common integrated circuits include operational amplifiers, logic gate circuits, microprocessors, etc., which are widely used in various smart devices and systems.
Component placement
In the PCBA process, component placement is the core link of the SMT patch process, which directly affects the quality and performance of the product. This process is mainly completed by a high-precision placement machine, and its operation steps are as follows:
Suction: The placement machine uses a vacuum nozzle to pick up components
Positioning: Accurately align the components with the PCB pads according to pre-programmed coordinate data
Placing: Gently place the components on the PCB surface
Pressing: Apply appropriate pressure to ensure good contact between the components and the pads
The placement accuracy requirements are extremely high, especially for high-density package components such as BGA (ball grid array) and QFN (quad flat no-lead), which usually require a placement accuracy of ±0.05mm or even higher. To meet this requirement, modern placement machines are equipped with advanced visual recognition systems that can accurately identify components and marks on PCBs to achieve micron-level positioning accuracy.
Solder paste printing
In the PCBA process, solder paste printing is a crucial link, which directly affects the subsequent welding quality and overall performance. As the first step of the SMT patch process, the quality control of solder paste printing plays a decisive role in the success of the entire PCBA production.
The principle of solder paste printing is to accurately deposit the solder paste to the pad position on the PCB board through the opening of the steel mesh. This process not only needs to consider the characteristics of the solder paste, but also needs to optimize the printing parameters to ensure uniform and consistent deposition effect. Choosing the right solder paste and steel mesh is essential to achieve high-quality solder paste printing.
In practical applications, solder paste printing is mainly used in the SMT patch process, that is, to accurately mount tiny electronic components on the PCB board. This method greatly improves production efficiency and accuracy, while reducing quality problems caused by human factors.
When choosing a solder paste printing solution, multiple factors need to be considered:
1.Circuit board size: determines the size and opening layout of the steel mesh
2.Number of electronic components: affects the amount of solder paste and the number of printing times
3.Pad layout: determines the shape and size of the steel mesh openings
4.Quality control requirements: affects printing accuracy and the choice of detection methods
common compenents on a pcba
Hoping that reading this article will be helpful to you to understand common compenents on a pcba.