It refers to a series of products or technological processes that use Tetramethylammonium Hydroxide (TMAH) as the developer in the manufacturing process of Electrophoretic Display (EPD). It is mainly applied to the photolithography process in the manufacturing of microelectronics and flat-panel displays. According to available information, TMAH is a commonly used positive photoresist developer and plays a key role in the array fabrication of Thin Film Transistor (TFT) and electrophoretic display screens. It is used to dissolve the exposed areas of photoresist to form fine patterns and further construct pixel structures. This process is commonly adopted in the substrate processing of electrophoretic display screens, enabling high resolution and low power consumption characteristics. EPD series equipment and materials generally involve the technical platforms of manufacturers such as E Ink and Pervasive Displays. Combined with the TMAH developing process, it can achieve paper-like display effects with high contrast and high reflectivity, and is widely used in scenarios such as e-book readers and electronic shelf labels.