Specific Process Knowledge/Etch/DRIE-Pegasus: Difference between revisions
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# During the reminder of the cycle the platen power is kept constant at 45 W. | # During the reminder of the cycle the platen power is kept constant at 45 W. | ||
=== Process A === | |||
Process A is labelled ''Large trench (80μm wide) 150μm depth''. In the acceptance test the process was run on a 150 mm wafer with 12-13 % etch load. The tables below show | |||
* The specifications and the results achieved | |||
* The recipe | |||
{| border="2" cellpadding="2" cellspacing="1" style="text-align:center;" | {| border="2" cellpadding="2" cellspacing="1" style="text-align:center;" | ||
|+ '''Process A''' | |+ '''Process A specifications''' | ||
|- | |||
! Parameter | |||
! Specification | |||
! Average result | |||
|- | |||
! Etch rate (µm/min) | |||
| > 15 | |||
| 18.9 | |||
|- | |||
! Etched depth (µm) | |||
| 150 | |||
| 189.1 | |||
|- | |||
! Scallop size (nm) | |||
| < 800 | |||
| 718 | |||
|- | |||
! Profile (degs) | |||
| 91 +/- 1 | |||
| 91.1 | |||
|- | |||
! Selectivity to AZ photoresist | |||
| > 150 | |||
| 310 | |||
|- | |||
! Undercut (µm) | |||
| <1.5 | |||
| 0.84 | |||
|- | |||
! Uniformity (%) | |||
| < 3.5 | |||
| 3.0 | |||
|- | |||
! Repeatability (%) | |||
| <4 | |||
| 0.43 | |||
|- | |||
|} | |||
{| border="2" cellpadding="2" cellspacing="1" style="text-align:center;" | |||
|+ '''Process A recipe''' | |||
|- | |- | ||
! | ! | ||