PCB assembly can be classified into different categories by component type, manufacturing process, application, cost and so on. Below is the normal types we usually produce.

• Through-hole PCB Assembly: This is a traditional method of assembling electronic circuits where the components are inserted into drilled holes on a PCB and then soldered onto the board. Through-hole components have metal leads that are pushed through drilled holes in the PCB and then soldered to the opposite side of the board.
• Surface-Mount （SMT）PCB Assembly: This is a newer method of assembling electronic circuits where the components are mounted directly on the surface of the PCB, without the need for drilled holes. Surface-mount components have small metal tabs that are soldered directly to the surface of the PCB.

• Mixed Technology PCB Assembly: Mixed technology assembly combines both through-hole and surface-mount techniques. This method is used when a PCB has a combination of large and small components. Through-hole components are typically used for components that require a strong mechanical bond, while surface-mount components are used for smaller components to achieve a higher component density.

• Ball Grid Array (BGA) Assembly: BGA assembly is a type of surface-mount assembly that uses a grid of tiny solder balls to connect the component to the PCB. BGA components are typically used for high-density applications where a large number of pins are required in a small space. BGA components are more difficult to assemble than other types of surface-mount components, and special equipment and techniques are required.

• Flip-Chip Assembly: Flip-chip assembly is a technique where the IC is flipped over and its contact pads are soldered directly to the PCB. This method is used for high-speed applications that require a shorter signal path between the IC and the PCB. Flip-chip assembly is more difficult to assemble than other methods and requires specialized equipment.

• Flex PCB Assembly: Flex-PCB assembly is the process of assembling flexible printed circuit boards (PCBs) with electronic components. Flex-PCBs are made of flexible materials such as polyamide, and they can bend or twist without breaking. The flexible nature of these PCBs makes them ideal for use in applications where space is limited or where the PCB needs to conform to a specific shape.