IC Knowledge - Glossary

Glossary of Integrated Circuit Terminology - Q

QFP - Quad Flat Pack - a common package for IC's with higher pin counts. Together with PLCCs, QFPs account for approximately 19% of integrated circuit packages on a units shipped basis. Use of QFPs is declining.
Quadrapole Illumination - a light source where light is split through four round openings located away from the optical axis of an illumination system. Quadrapole illumination is a type of off axis illumination and improves the minimum feature that an exposure system can resolve for a given wavelength.
Qualification - a set of tests and specifications a product or process must meet before being considered a production process.
Quartz - a crystalline form of silicon. Widely used for furnace tubes and boats.