7 AF Wafer Backside

The Strasbaugh 7 AF Wafer Backside Grinder is a wafer backside grinding machine used in semiconductor processing to thin wafers from the rear side. It is associated here with 6-inch wafers.^[1]

A wafer backside grinder removes material from the rear surface of a wafer by controlled abrasive grinding. In this class of equipment, the wafer is held on a support or chuck while a grinding wheel advances against the backside to reduce thickness and improve uniformity.

Backside grinding is typically a mechanical material-removal process that is tuned to control thickness, flatness, and surface condition before later finishing steps. The machine is used as part of a thinning flow and is distinct from dicing, which separates individual dies after wafer-level processing.

Wafer backside grinding fits into the back-end portion of wafer processing, where wafer thickness is reduced before subsequent singulation or packaging-related steps. It is generally used after front-side device fabrication and before final die separation or assembly operations.

Wafer backside grinders are used for semiconductor wafers that require thinning for device integration, improved package form factor, or later singulation. They are part of mature-node and general wafer-processing lines where mechanical thinning is needed.