Mask Aligner

A mask aligner is a machine used in manufacturing electronics, especially in creating tiny circuits on semiconductor wafers. It works by precisely positioning a patterned mask—similar to a stencil—over the wafer. The wafer is then exposed to light or other signals through the mask, transferring the pattern onto its surface. This process is essential for building components like microchips, enabling high accuracy and control. The mask aligner ensures that each pattern is correctly aligned for multiple layers, forming the intricate connections needed for modern electronic devices.