What is a midwafer?

Answer 1

A midwafer is a term used in semiconductor manufacturing that refers to the stage in the fabrication process where the wafer has undergone several initial processing steps but is not yet fully completed. This stage typically includes various lithography, etching, and deposition processes that define the electronic components on the wafer. At midwafer, the wafer is between the raw silicon substrate and the final, fully processed semiconductor device ready for testing and packaging. It is a critical point in the production cycle, as the quality and precision of the processes at this stage significantly influence the final product's performance.