Abstract: A solder paste printing quality inspection (SPI) method includes establishing at least one data inspection model, acquiring real-time test data, preprocessing the real-time test data, and determining a type of the real-time test data and inputting the real-time test data into the data inspection model corresponding to the type of the real-time test data to obtain a judgment result of the solder paste printing quality inspection. The real-time test data includes one or both of a test image and a test value of solder paste printing quality inspection. The preprocessing includes obtaining key parameters of the test value or obtaining image data of the test image and standardizing the real-time test data.

Abstract: A solder paste printing quality inspection (SPI) method includes establishing at least one data inspection model, acquiring real-time test data, preprocessing the real-time test data, and determining a type of the real-time test data and inputting the real-time test data into the data inspection model corresponding to the type of the real-time test data to obtain a judgment result of the solder paste printing quality inspection. The real-time test data includes one or both of a test image and a test value of solder paste printing quality inspection. The preprocessing includes obtaining key parameters of the test value or obtaining image data of the test image and standardizing the real-time test data.

Abstract: The card edge connector includes: an electrical receptacle formed with an abutting surface; two fasteners pivoted to the electrical receptacle, wherein each of the fasteners is formed with a snap-fitting surface that makes contact with the fastened surface to form a fastening area, the fastening area has a contact point that is closest to a central perpendicular line of the electrical receptacle, and the contact point has a first distance from the central perpendicular line; and wherein each of the fasteners is provided with an abutting portion, and when the abutting portion abuts against the abutting surface correspondingly, an abutting area is formed which has an abutting point that is closest to the central perpendicular line of the electrical receptacle, and the abutting point has a second distance from the central perpendicular line that is less than the first distance.