The Methods of DIP

DIP stands for Dual In-Line Package, which refers to a type of dual in-line assembly.

As surface mount technology (SMT) processing advances rapidly, SMT chip processing has increasingly supplanted DIP plug-in processing. Nevertheless, due to the larger size of certain electronic components in PCBA production, plug-in processing remains essential and continues to play a significant role in electronic assembly. Typically, DIP plug-in processing occurs after SMT patch processing and generally involves manual insertion along a production line, requiring a substantial workforce.

What is SMT?

SMT, or Surface Mounted Technology (SMD), is a widely utilized technology and process within the electronics assembly sector.

The DIP plug-in processing workflow can be broadly categorized into the following stages: component molding, plug-in, wave soldering, trimming component leads, repair welding (post-soldering), board cleaning, and functional testing.

1. Pre-processing Components

Initially, the personnel in the pre-processing workshop gather materials from the designated storage area in accordance with the Bill of Materials (BOM). They meticulously verify the material model, specifications, and markings, and then carry out pre-production processing based on the provided samples. This involves utilizing various molding equipment, including an automatic bulk capacitor clipper, a transistor automatic molding machine, and a fully automatic belt molding machine.

2. Plug-in

The processed chip components are inserted into their designated positions on the PCB board in preparation for wave soldering.

3. Wave Soldering

The PCB board, now equipped with the inserted components, is placed onto the wave soldering conveyor belt. The soldering process is completed through a series of steps, including the application of flux, preheating, wave soldering, and subsequent cooling.

4. Component Foot Trimming

The leads of the soldered PCBA board are trimmed to achieve the required dimensions.

5. Repair Welding (Post-Welding)

For PCBA boards that are not fully welded, it is essential to carry out necessary repairs to ensure their integrity.

6. Plate Cleaning

The PCBA finished product must be thoroughly cleaned to remove flux and other potentially harmful residues, ensuring compliance with the environmental cleanliness standards set by customers.

7. Functional Testing

Once the components have been soldered, the completed PCBA board should undergo functional testing to verify that all features operate correctly. If any functional defects are identified, repairs should be made, followed by retesting.