Custom wafer cassettes made of specified materials or with specific physical characteristics are often needed in wet bench equipment for some applications. Many times, off-the-shelf carriers with the required characteristics are often not available. Custom wafer cassettes ordered in low volumes can meet the requirements of research and testing facilities and allow them to carry out specialized silicon wafer fabrication. Semitech Systems, LLC can provide modifications to existing off-the-shelf cassettes and carriers, or build custom prototypes from scratch.