Specific Process Knowledge/Lithography/EBeamLithographyManual: Difference between revisions
Appearance
| Line 426: | Line 426: | ||
= Troubleshooting = | = Troubleshooting = | ||
'''No EBX Menu is open in any of the desktops:''' Open a console (click on arrow above the text ‘CPU’ on bottom menu bar) and from location (DTU)/ type ‘ebxmenu’. | |||
'''The ACHK or WRTEST programs are nowhere visible:''' Open Analysis form EBX Menu; from here you can find ACHK and WRTEST. | |||
'''I forgot to tick the EXCH EVAC''' before transferring my cassette from the e-beam writer to the autoloader: Transfer your cassette back into the e-beam ('Carry in'), then tick 'EXCH EVAC' on, and click 'Carry out' to transfer the cassette to the autoloader and pump down the exchange chamber | |||
Basic unix operations | == Basic unix operations == | ||
<pre> | |||
cd job | cd job Change directory to 'job' | ||
cd .. Go one directory up (parent directory) | |||
cd .. | dir List the directories and folders | ||
CTRL+p (CTRL+n) Scroll to previous (next) command | |||
dir | Click on middle mouse button Copy highlighted text, or paste copied text | ||
CTRL+p (CTRL+n) | Tripple-click on left mouse button Highlights all text in a window (works in some windows only) | ||
Click on middle mouse button | </pre> | ||
Tripple-click on left mouse button | |||
== Calibration problems == | == Calibration problems == | ||
'''No current can be detected when executing CURRNT:''' Use another condition file or call one of the contact persons to get help. | |||
'''The DISTBE subprogram runs for more than 15 minutes:''' | |||
*Stop the subprogram from the calibration window (Command/Subprogram Stop). | |||
*Click 'DISTBE/Edit Parameter'. Click 'Settings'. | |||
*Change the scan position by 0.2 microns, both in X and Y. | |||
*Add a few nanometer to the 'allowable convergence value'. | |||
*Save and execute DISTBE again. | |||
If DISTBE runs successfully, acknowledge the 'write to memory'-request, and run the last subprogram of the 'daily' batch manually. If it does not help, call one of the contact persons for help. | |||
'''The detection of AE/BE or wafer marks gives an either too saturated or too noisy signal:''' | |||
*Edit the AGCAE/AGCBE or AGCRG programs by entering the position of your AE/BE or wafer mark and execute the program. | |||
*When the program finish successfully, apply the settings to other relevant subprograms; see 'the INITAE or INITBE mark cannot be detected' section. | |||
'''The INITAE or INITBE mark cannot be detected:''' | |||
The system has probably drifted too far away from the mark to be able to detect the mark. Increase the scan width by doing this: | |||
*Highlight INITAE and click 'Edit parameter' | |||
*From the INITAE window, click 'AE mark detection condition Setting' | |||
*Increase the scan width to around 40 µm, click apply, and execute INITAE again | |||
*If the mark has been detected, click Update in the INITAE-window when the subprogram has finished | |||
*Decrease the scan width to its original value, click apply and execute INITAE again | |||
The same procedure applies to INITBE; here, the scan width can be increased to more than 40 µm, though. If the marks still cannot be detected, call one of the contact persons to get help. | |||
When the AE and BE marks has been found, the settings should be applied to all other relevant subprograms: | |||
*Click 'Setting..' in the INITAE window | |||
*Click 'Applies to another subprogram' in the 'detection condition' window | |||
*Click 'All Select' in the 'applies to another subprogram' window; this highlights all subprograms on the list. Click 'Subprograms that can be set' to execute. | |||
The same procedure applies to the BE mark detection. Test whether subprograms can be executed by running e.g. SFOCUS and PDEFBE (quite short programs). | |||
== Alignment problems == | == Alignment problems == | ||
'''SETWFR cannot detect my P and Q marks:''' Unload your wafer/chip, remove the resist from your wafer marks and repeat your exposure with manual alignment: | |||
'''Alignment commands for manual alignment (see 'sdf- and jdf-file preparation' manual):''' | |||
*Change the global mark detection in the sdf-file: GLMDET M (i.e. manual detection). Recompile the magazine file. | |||
*Calibrate as without alignment. | |||
*Execute exposure, wait until the machine prompts for action: | |||
*The machine will start a subprogram 'SETWFR' right before the exposure and move the stage to the position of the P-mark as stated in the jdf-file. Click 'YES' to manually align the machine to the global marks. In order to move the stage to the correct position of the P-mark (as detected with the optical pre-alignment), open the 'Stg' program from the EBX Menu. | |||
*Move the target position (stage position) by clicking 'Setting...' and edit the X and Y parameters to the values found from the pre-alignment. Click 'Movement' to execute the movement. | |||
*From the sspvideo (can be opened by 'Image' from the EBX Menu), start the SEM from 'Change/SEM'. Adjust the Brightness/Contrast and scan width by opening the Image Setting and Image Adjustment windows ('Setting...' and 'Adjustment...' buttons). | |||
*Find the P-mark by adjusting the stage position using the step movement from the stage controller. When the mark is centered, click 'Pattern writing continuation' and repeat the procedure for the Q-mark. Finish the global alignment by clicking 'Pattern writing continuation', and the exposure will start. | |||