Regarding the slits and trimming of the wafer:In order to determine the direction of the crystal, a small piece or a small opening will be cut off at the edge. This is the semiconductor industry standard. There is no pure circle, otherwise the crystal direction cannot be positionedWhat is a wafer? Wafer refers to the silicon wafer used to make silicon semiconductor circuits. Its original material is silicon wafers extracted from sandWhat is a wafer lithography chip? In the chip production process, there will be defective chips, the surface has a lithography pattern, or has been plated with gold, silver and other precious metals.The color of a wafer lithography chip is affected by what? There are two sources of color, the first is the color of the coating itself, usually gold, silver, mostly gold, platinum; the second is structural color, the wafer surface has nano-scale lithography patterns, which make light waves refract, diffuse reflection, diffraction or interference and produce various colors, so it appears colorful