Used PVA Delta 8 #293587055 for sale

PVA Delta 8 is a photoresist system designed for advanced lithographic processes used in the semiconductor industry. It is a negative tone photoresist that enables superior pattern formation, opacity, edge resolution and high-quality line width control. Delta 8 is a three component solution that consists of a polymerizable vinyl monomer, a photoacid generator, and a photo insoluble dye dissolved in a resist solvent. The photoacid generator, when exposed to a UV light source, generates a strong acid that is capable of initiating a cationic polymerization. This acid is responsible for the etching of specific areas within the resist layer, while remaining regions of the resist remain intact. The insoluble dye is the component responsible for light absorbing capabilities. This is done through its ability to absorb ultraviolet light, as well as light at various other longer wavelength ranges. The third component, the polyvinylalcohol, serves as both a bind element and as a protective coat since it tends to retain the dye molecules within its molecular structure. This molecular structure also increases the ratio of the dissolution rate of the exposed parts of the polyvinylalcohol to the unexposed parts. The combination of these three components within the resist solvent enables PVA Delta 8 system to provide superior resolution, edge profile and superior line width control. It also exhibits excellent processing characteristics, adhesion, and low dissolution and undercut ratios. Due to its complexity, Delta 8 is ideally suited for advanced device fabrication processes, including gallium nitride semiconductor devices, and is also often used in photomasks, MEMS and fingerprint element manufacturing. It is also being used in the highly sophisticated fields of optoelectronic and flat panel display manufacturing.