Known good die的意思

"Known good die" (KGD) is a term used in the semiconductor industry to refer to individual dies or chips that have been tested and verified to be functioning correctly. These dies have passed all the necessary electrical and functional tests and are known to be good, hence the name "known good die."

KGD is an important concept in the manufacturing of integrated circuits (ICs), especially in the context of flip-chip packaging, where the individual dies are assembled directly onto a substrate or printed circuit board (PCB). In such packaging, the dies are typically tested before they are assembled into the final product, to ensure that only good dies are used.

The use of KGD can help to improve the quality and reliability of the final product, by ensuring that only good dies are used. It can also help to reduce the cost of manufacturing, by reducing the number of failures and the need for rework or scrap.

KGD is often used in the manufacturing of high-performance and high-reliability ICs, such as those used in aerospace, automotive, and other critical applications, where the reliability and performance of the components are critical.