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In semiconductor manufacturing, most of 200mm fabrication facilities (called fabs) currently existing operate in manual or in semi-automatic material handling system. To remain competitive and to deal with the migration from high-volume/low-mix to high-mix/low-volume, most of these fabs require investment on factory automation especially on handling operations. This paper addresses a problem of Automated...
In semiconductor high-mix fabs, several technology nodes are run on the same line, using tool types from different generations. In this context, processability is a function defining which products can be processed on a given machine considering the current status of both the product and the machine. So in a high-mix context, having an information system that provides reliable information on processability...
In a worldwide environment, sustaining high yield with a minimum number of quality controls is key for manufacturing plants to remain competitive. In high-mix semiconductor plants, where more than 200 products are concurrently run, the complexity of designing efficient control plans comes from the larger amount of data and number of production parameters to handle. Several sampling algorithms were...
In order to minimize yield losses due to excursions, when a process or a tool shifts out of specifications, an algorithm is proposed to reduce the scope of analysis and provide in real time the number of lots potentially impacted. The algorithm is based on a Permanent Index per Context (IPC). The IPC allows a very large amount of data to be managed and helps to compute global risk indicators on production...
In order to optimize the number of controls in semiconductor manufacturing, a Permanent Index per Context (IPC) has been developed to evaluate in real-time the risk on production tools. Depending on the context which can be defined at tool level, chamber level or recipe level, the IPC allows a very large amount of data to be managed and helps to compute global risk indicators on production. A prototype...
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