Utah-94-721002-System-Manual.pdf - 第81页

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System alerts are displayed when PC 2000 detects an event that requires the attention of the

user. Each alert is automatically categorised depending on the nature of the event and the

response required by the user. The category of the event can range from a warning indicating

that a service parameter is out of tolerance to a process abort indicating that a process

setpoint has been out of tolerance for so long that the process cannot be completed. A

typical system alert is shown in Fig 5.2.

System

lert

anner

System Alert

dialogue

Fig 5.2: Typical system alert

The alert is displayed as a banner in the menu bar at the top of the screen with an associated

dialogue in the main screen area. Note that more than one alert can be active at the same

time, each requiring action by the user in turn.

There are three categories of alert indicated by the colour and text displayed in the banner

and dialogue:

Blue Warning e.g. water flow low.

Yellow Hazard – not currently used.

Red Process abort, e.g. high-reflected RF power.

A user logged on at any access level can close the alert dialogue, but only a user logged on as

a system manager can clear the alert banner from the menu bar. The dialogue options are:

Accept button: System Managers only. Clear the alert and log it.

Next button: View the next alert.

Cancel button: System Manager only. Clear the alert; do

not log it.

Operating Instructions

UC Davis 94-721001 Issue 1: March 06 Page 5-14 of 52 Printed: 22-Mar-06, 10:42

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Continue button: Close the alert dialogue box – the alert banner remains displayed

on the menu bar.

Note that option buttons that are not available (i.e. Accept and Cancel due to user ‘logged

on’ status and Next when there is only one active alert) are greyed out.

The alert message usually contains an adequate description of the detected event. If it is a

service fault (water flow, purge gas etc.) then verify that the service is available to the

machine as soon as possible. Depending on the nature of the service, the system may allow

the machine to continue to operate, so that the current process can be completed.

Do not

start a new process before checking the service.

The red alerts are often due to a process setpoint being out of tolerance for too long. In these

cases, the process is halted by the system. If it is authorised to resume processing with a

parameter deviation then:

1) Check the most recent process log to find the process time remaining.

2) Construct a new process with a modified process time and check the ‘Ignore

tolerance’ option. Note that this removes

all tolerance checking. The machine should

be monitored by an operator for further deviations when operated in this condition.

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1) On the Pump Control page, select the SET BASE PRESSURE button, then enter the

required process chamber base pressure if different from the default.

2) Ensure that the Automatic load lock/transfer chamber’s lid is closed. (Automatic load

lock/transfer chamber lid open/closed status is shown in the panel adjacent to the

mimic).

3) Click on each dry pump/rotary vane pump mimic to start the pump.

4) Select the Evacuate button for the process chamber. The relevant valves will

operate and the process chamber will be pumped down.

5) Select the Evacuate button for the Automatic load lock. You will be prompted to

enter a wafer identity - either enter the identity and click OK, or click Cancel (to

pump down without a wafer in the Automatic load lock). The relevant valves will

operate and the Automatic load lock will be pumped down.

NOTE: Turning off any rotary vane pump will cause all process and pumping

actions using that pump to stop.

6) To achieve a low base pressure in the system, pump for at least 12 hours. Where

chambers or process heaters are part of the system, raise the temperatures of these

near their maximum values for the first six hours of pumping to assist out-gassing,

then return the temperature to ambient.

WARNING

PARTS OF THE EQUIPMENT MAY BE TOO HOT TO TOUCH DURING CHAMBER

HEATING.

Operating Instructions

Printed: 22-Mar-06, 10:42 Page 5-15 of 52 UC Davis 94-721001 Issue 1: March 06

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An automatic process run as described in this sub-section can be carried out by a user logged

on as a Manager. See sub-section 5.4.6, page 5-17 for details of a single button automatic

process run, which can be carried out by any user.

1) Insert the wafer into the Automatic load lock. (If necessary, vent the Automatic load

lock by selecting the STOP button then the VENT button).

2) Close the Automatic load lock’s lid.

3) Select the relevant EVACUATE button. A dialogue box will be displayed allowing

entry of a Wafer Identity, if any.

4) Check that the system has pumped down to base pressure. (The process chamber

message panel should display ‘Base Pressure reached’.)

5) Ensure that the Automatic load lock is at the required pressure. (Check the relevant

panel on the Pump Control page). Green ‘ready for transfer’ indicators (WX) are

displayed on each chamber mimic when it is available for vacuum transfer.

6) Select the Process menu, then the Recipe option. Click on the Load button then

select the required recipe.

7) Click on the Run button. This will start wafer transfers and wafer processing.

NOTES:

a) You can pause the process at any time by selecting the PAUSE button.

This will cause the Step Time and the plasma power to stop with the

current step time indicated. Re-starting the process will cause the

process to continue from the time it was paused. If, during the pause

period, you change any of the process parameters, e.g. gas demand,

pressure etc., you must press the START button for the changes made to

come into effect, this will cause the step timer to continue from the time

it was paused.

b) You can stop the process at any time; the message ‘Process Complete’

will be displayed, if required, you can then run the same or another

process.

WARNING

CONTACT WITH TOXIC GASES CAN CAUSE DEATH OR SERIOUS INJURY.

WHERE ANY PROCESS GAS IS TOXIC, DO NOT TRANSFER A WAFER FROM THE

PROCESS CHAMBER TO THE LOAD LOCK UNTIL ALL PROCESS GAS HAS BEEN

PUMPED OUT.

ENSURE THAT THE AUTOMATIC VENT SEQUENCE IS ALLOWED TO COMPLETE.

IF THESE PRECAUTIONS ARE NOT CARRIED OUT, THERE COULD BE A HAZARD IN THE

LOAD LOCK.

Operating Instructions

UC Davis 94-721001 Issue 1: March 06 Page 5-16 of 52 Printed: 22-Mar-06, 10:42