on front   Plating preparation (descum)  |  
  | 
        
        | Ambient Ambient to which substrate is exposed during processing  | 
            oxygen/carbon tetrafluoride | 
            
            | Material | 
            SU-8 | 
            
            | Selectivity Primary material removal rate divided by removal rates of secondary materials (i.e., factors by which primary material is removed faster than secondary materials)  | 
            SU-8: 1 | 
            
            | Sides processed | 
            either | 
            
            
            | Wafer size | 
            
 | 
            
            
            
            | Equipment | 
            Plasma etcher | 
            
            
            
              | Equipment characteristics: | 
            
            | Wafer geometry Types of wafers this equipment can accept  | 
            no-flat, 1-flat, 2-flat, notched | 
            
            | Wafer holder Device that holds the wafers during processing.  | 
            aluminum plate | 
            
            | Wafer materials List of wafer materials this tool can accept (not list of all materials, just the wafer itself).  | 
            glass (category), Pyrex (Corning 7740), quartz (single crystal), silicon | 
            
            | Wafer thickness List or range of wafer thicknesses the tool can accept  | 
            300 .. 1500 µm |