Strasbaugh nTellect (Model 7AF) Wafer Grinder
8 - 18 Version 1.2 - June 2004
DRESS CYCLE MENU
The Dress Cycle (automatic dress) menu is the screen location at which automatic
cycles for truing and dressing the work chucks and grind wheels are run.
When to True and Dress Grind Wheels and Work Chucks
• Refer to Visual Wafer Inspection - Identifying and Correcting Six Grind Process
Problems, located in the Normal Operating Conditions and Strategies for
Maintaining Them section of the Troubleshooting chapter of this manual, for
solving grind process problems with dressing and truing.
• True a newly installed grind wheel before using.
About Truing
On the Model 7AF the probes may be used to check the work chucks for true (radial
runout, indicated by a probe fluctuation of less than one micron).
Truing a wheel or chuck prior to use ensures that the entire face of the wheel is in
contact with the part at all times during the grinding cycle. The entire face thereby
contributes to the grinding process, preventing excessive vibration or chattering.
Wheel truing removes runout, making the wheel surface parallel to that of the chuck.
About Dressing
Dressing a wheel improves or alters its cutting action. The dressing action removes
the outside layer of dulled diamonds and any loading of material that the wheel may
have picked up, exposing the sharp, strong diamonds.
Dressing a chuck conditions its surface to remove debris and unclog vacuum pores,
resulting in reduced thickness variations within the wafers processed.
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