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Revision 1 - 23 April 1999, David Sigmon
Revision 2 - 2 May 2003, Jae Diao & Peter Sahlstrom
Tencor Alphastep-500
The Alpha-Step is one of two profilometers in the lab. Profilometers
measure the difference in thickness across a sample and may be used
to measure deposition thicknesses.
Features
- measurement of vertical features from <100Å - 0.3mm with
vertical resolution of 1Å or 25Å
- displays english or metric units
- 5,000 points per scan
- ablility to level scans
- supports samples up to 6" wide and up to 15mm thick
Operating Instructions
- Press F1 to edit the recipe. You can either load a recipe or just
set the parameters you want to use. Press ESC to leave the recipe
editor. You can return to or switch between the recipe editor and
profile display window by pressing ESC any time.
- Press the X-Y key. After a few seconds, the stage will be displayed
on the screen. It may be severely out of focus at this point.
- Press the up arrow on the keyboard. This will make the stylus
move out of the way if it isn't already. It is important to do this every time before you load or unload your sample so as not to damage the stylus.
- Use the knobs under the stage to move the stage towards you.
- Put the sample you want to examine on the stage.
- Move the sample under the microscope. The area under the microscope
is illuminated.
- You may need to press the down arrow key to raise the stage to get it
into focus. Once it is in focus, press the up arrow key breifly to raise the
stylus. Do not move the stage with the stylus down.
- Move the stage into position using the knobs under the stage. You can rotate
the stage too (just turn it by hand).
- After you have the stage lined up, press the start key. The stylus will
come down, move across the sample, then go up. Then the results will be displayed.
- You may want to change the recipe settings or move the sample using the
instructions above to get the results you want.
- Usually, the scan will not be level. You can level it by pressing F11 (LEVEL),
and using the trackball to move the two leveling lines to two points on
the graph that should be at the same height. You can switch lines by pressing
space. When you have the lines in position, press LEVEL again. The display will be
leveled.
- You can use the trackball to move two vertical lines on the screen. Use the space
key to select which line you are moving. The height difference between the lines
is displayed on the left side of the display.
- For any of the four cursors (or vertical lines, two for leveling and two for measurement), you can use the up arrow to split the line into two and the computer will display the average results in the area confined by the two lines on the left side of the screen; you can reduce the two lines to one by holding the down arrow.
- You can zoom in on a given area by pressing F12 (ZOOM), using the trackball to move
the box over the area you want to zoom in on and pressing F12 again.
- If you want a printed copy of the screen, press PRINT SCREEN. After a few
seconds, the printer will start printing.
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