Black alumina ceramic substrates are mostly used in semiconductor integrated circuits and electronic products. This is mainly due to the fact that most electronic products have high photosensitivity and require strong light-shielding properties of the packaging material to ensure the clarity of digital displays. Packaged with a black alumina ceramic substrate. With the continuous updating of modern electronic components, the demand for black alumina packaging substrates has also expanded. At present, domestic and foreign countries are actively carrying out research on black alumina ceramic manufacturing processes.