Chip processing In the electronics manufacturing industry, the inspection of PCB (printed circuit board) blank boards is a crucial part of the process before chip processing. This step ensures the quality of the PCB before it enters the placement process, providing a stable basis for subsequent component placement. The following is a detailed analysis of the PCB blank board inspection process:
The first thing to do is the visual inspection. This step is mainly to check the surface of the PCB board for obvious defects such as scratches, stains, oxidation, etc., by visual inspection or using tools such as magnifying glasses. These defects can affect the quality of the subsequent placement and must therefore be identified and treated prior to processing.
Dimensional inspection is a critical step to ensure that the PCB board meets the design requirements. This includes checking dimensional parameters such as length, width, and thickness of the board, as well as detailed dimensions such as hole positions and margins. The accuracy of dimensional inspection is critical for subsequent component placement and circuit functionality.
The conductivity check is mainly to test the conductivity of the PCB board. This includes checking that the circuit is routed continuously, unimpeded, and that the conduction between the layers is conducted. Conductivity checks are usually carried out using professional testing instruments, such as flying probe testers, etc. This step helps to identify potential open or short circuits and avoid circuit function failures after placement.
Solderability check is a test performed on the pads on the PCB. The pad is the bridge between the component pins and the PCB board, and its solderability directly affects the firmness of the chip and the long-term stability of the circuit. Solderability checks typically include testing pads for surface roughness, cleanliness, and wettability.
Identification check is the process of checking various logos on a PCB board. This includes checking that the silkscreen information on the board, component position identification, etc., is clear and accurate. Identification checks help ensure that component position and orientation are correctly identified during the placement process, improving productivity and product quality.
The inspection of PCB blank boards is an indispensable part of the chip processing process. Through a comprehensive inspection of appearance, size, conductivity, solderability and identification, the quality of the PCB board before entering the placement process can be ensured, and it can provide a strong guarantee for subsequent component placement and circuit function.