G-4
Scan Stitching
Figure G-3: Data Stitching Dialog Box.
EFFECTS OF AVERAGING
Averaging can be useful for scans of smooth, unpatterned surfaces such as bare wafers. It is normally
not useful for samples with features.
The following examples show the effects that averaging has on the measurement shown in
Figure G-1
.
Stitching Order of Operation (No Averaging)
1
Measurement 1
2
Measurement 2 - displayed simultaneously
3
In the overlap region:
a.
M1 - Compute line fit.
b.
M2 - Compute line fit.
c.
Remove tilt from M2.
d.
Match tilt in M1 to M2.
e.
Discard data from M1.
f.
Align datasets at M2 start position.
Stitching Order of Operation (Averaging)
1
Measurement 2 - displayed simultaneously
2
In overlap region:
g.
g. M1 - Compute line fit.
h.
h. M2 - Compute line fit.
i.
i. Remove tilt from M2.
j.
j. Match tilt in M1 to M2.
k.
k. Average M1 & M2 (Raw or Sm
l.
oothed Data, overlap only).
m.
l. Align datasets.
Select this check box and enter a
Length value to apply averaging.
Click this button and enter a Win-
dow value to apply smoothing.
Summary of Contents for Dektak 150
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