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What You Should Know About BGA Assembly

anuskseo by anuskseo
November 11, 2022
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If you are looking to work in an electronics assembly facility, then you might want to look into BGA assembly. Before you go about the process, you should know a few things. X-ray inspection is essential for BGA assembly. You must also understand the problems with solder paste. In addition, you should be good with dexterity and computer skills. You also need to have some experience operating an X-ray machine. It is important for assembly workers to be able to interpret the x-ray image. This will help them identify faults in soldering.

Table of Contents

  • Problems with BGA assembly
  • Costs of BGA assembly
  • X-ray inspection required for BGA assembly
  • Rework requirements for BGA assembly

Problems with BGA assembly

Common problems with BGA assembly include insufficient contact points between the BGA and PCB. These defects can lead to intermittent package failure. Other potential causes include improperly stored or handled boards. In some instances, the board fabrication plate may be contaminated. Regardless of the root cause, these defects are preventable.

To avoid problems with BGA assembly, technicians should research each device before touching it. They must determine the size of the solder balls and check for coplanarity. They must also decide what solder paste to use and whether to use a stencil. Furthermore, they must determine the chemistry and alloys used for the BGA components.

Costs of BGA assembly

BGA assembly costs vary widely and can be as high as two hundred and thirty US dollars for a small prototype. They may even run up to 300 USD for larger quantities. In addition to meticulous packaging and inspection, BGA PCBs require extra manpower. The cost of BGA PCB assembly also depends on the type of package used. High-frequency PCB boards require special materials such as FR4 and are more expensive. Other factors that impact BGA assembly cost include the thermal properties of the PCB.

The process of BGA assembly requires precision soldering. The soldering process is usually done by automated processes. Because BGA devices require precise control, the process requires high-precision equipment and an X-ray imaging system. In addition, BGA components cannot be reused after rework.

X-ray inspection required for BGA assembly

BGA assembly requires the use of X-rays to ensure that all solder connections are secure. These devices are difficult to assemble because of the high density of the connections and the high temperature required to melt the grid balls. During this process, errors can occur as the solder balls fail to flow together, causing them to be off-center or have voids. X-rays can reveal these problems and detect them quickly before they cause a failure.

When conducting an X-ray inspection, it is critical that the inspection process is based on customer specifications. For example, the X-ray system should have high contrast and be operated with extreme caution to avoid damaging the parts. The operator should also use a laser pointer to highlight the area of interest. In addition, the operator should properly set up a folder to record images and video. After the X-ray images have been captured, operators should transfer the images into the correct folder.

Rework requirements for BGA assembly

The ball grid array (BGA) is a highly complex device. The proper preparation is essential to minimize the risks of rework issues. Moreover, BGA rework equipment must be capable of performing several tasks. It also needs to withstand repeated use. It is important to know the exact requirements of rework equipment to ensure a high level of safety.

The BGA rework machine must be able to support a designated reflow profile. This feature is essential for replacing faulty components. It must be able to match the board and component sizes to guarantee coplanarity. The platform should also have adjustable supports for the underside of the board.

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