ANU Nanotechnology: Cleanroom Use Training and Access Examination

7 April 2026 12 min read

The nanotechnology program at the Australian National University (ANU) requires students and researchers to complete a standardised training and access examination before using its on-campus cleanroom facilities. Located in the Ian Wark Laboratory building, the cleanroom is one of the core nodes of the Australian National Fabrication Facility (ANFF). According to the official ANU Laboratory Safety Manual (2024–2025), the cleanroom serves more than 300 registered users a year, including undergraduates, postgraduates and visiting researchers. The training system is designed to ensure operators master the standards for ISO Class 5 to Class 7 clean environments, reducing the impact of particulate contamination on micro- and nanofabrication experiments. With semiconductor and quantum device research heating up at ANU, and ANU materials science ranked 42nd globally in the 2023 QS World University Rankings by Subject, cleanroom access has become a compulsory skills gateway for students in the field.

Cleanroom Classes and Equipment Coverage

The ANU nanotechnology cleanroom is divided into two core zones: an ISO Class 5 lithography area and an ISO Class 7 general processing area. The Class 5 area allows no more than 3,520 particles ≥0.5 μm per cubic metre of air and is used mainly for precision patterning processes such as electron-beam lithography and deep-UV lithography. The Class 7 area has a particle limit of 352,000 per m³ and handles operations such as wet etching and chemical vapour deposition (CVD). According to the ANFF 2024 equipment inventory, the cleanroom is equipped with 12 major processing tools, including the Raith 150 electron-beam lithography system, an Oxford Instruments plasma etcher and a Süss MicroTec mask aligner.

How ISO class affects experimental materials

The ISO class directly determines the sensitivity of materials that can be handled. For example, air-sensitive materials such as graphene and two-dimensional transition metal dichalcogenides may be processed in the Class 5 environment, while the Class 7 area prohibits the introduction of unencapsulated quantum dots or organic light-emitting materials. The ANU Laboratory Safety Procedures (2023 revision) stipulate that any handling of silicon wafers with native oxide layers in the Class 5 area requires a 30-minute air purge before entry.

Equipment access restrictions

Each major piece of equipment has its own operator qualification requirements. For the electron-beam lithography system, for example, operators must complete an additional 4 hours of theory training and 8 hours of supervised hands-on practice, and pass a device-specific written exam (accuracy ≥85%), before they can gain independent operating access. This data comes from the 2024 training syllabus of the ANU College of Engineering and Computer Science.

The Three Stages of Training

Cleanroom access training has three stages: an online module, a written exam and a practical assessment. Stage one is online safety training, lasting about 2 hours and covering the reading of chemical safety data sheets (SDS), the locations of emergency showers and eyewash stations, and the correct order for putting on cleanroom garments. This module is completed through ANU’s Wattle learning management system and requires a 100% accuracy score within 48 hours.

The written exam and pass mark

Stage two is a closed-book written exam of 40 multiple-choice questions covering cleanroom conduct rules, waste classification and equipment emergency shutdown procedures. According to training statistics ANU released in March 2024, the first-attempt pass rate is 72%. Those who fail can retake the exam after 7 days, up to a maximum of 3 retakes in total. Written exam results are valid for 6 months.

Practical assessment standards

Stage three is an on-site practical assessment conducted by the ANU nanotechnology laboratory manager or an authorised technician. It covers correct donning of cleanroom garments (the full sequence from hairnet to shoe covers), time control when passing through the airlock (≤15 seconds), and simulated wafer transfer operations. The assessment uses a 10-item checklist, and failing any single item means an overall fail. The ANU 2024 internal audit report shows that about 15% of first-time trainees lost points on the “cleanroom garment seal check”.

Common Failure Points in the Cleanroom Access Exam

Analysis of exam data from the ANU Nanotechnology Laboratory for 2023–2024 shows that failures cluster around three areas. First is airlock operation: about 28% of candidates failed to complete the 30-second tacky mat stepping procedure before entering the cleanroom, leaving particulate residue. Second is chemical labelling: 21% of candidates did not fill in the ANU standard chemical waste label (which records the composition, concentration, date and operator’s name) when pouring waste liquids into the designated container.

Wrong order for donning cleanroom garments

Donning order errors are the third most common cause of failure, at 18%. ANU procedure requires the hairnet first, then the coverall, and finally the mask and gloves. Some candidates reverse the hairnet and coverall order, allowing hair to contaminate the inside of the coverall during dressing. This procedure is illustrated in detail in Section 7.3 of the ANU Laboratory Safety Manual.

Not knowing the emergency stop button locations

About 12% of candidates, when quizzed at random after the written exam, could not accurately point out the two nearest emergency stop buttons in their area. The ANU cleanroom has 6 emergency stop points in total, located on the airlock’s outer wall, beside the lithography tool and in the corner of the wet bench. The laboratory manager noted at the January 2024 safety meeting that this figure shows training should include a hands-on identification session.

Training Resources and Time Commitment

Completing the full training and access examination usually takes 2 to 3 weeks, depending on how quickly you can book a practical assessment slot. ANU runs 2 fixed training batches per month, held in weeks 2 and 8 of each semester. Cross-institutional users (such as researchers from ANU partner organisation CSIRO) must pay an additional AUD 50 temporary user fee, which covers personal protective equipment (PPE) and chemical consumables.

Free retraining policy

Candidates who fail the written exam or practical assessment on the first attempt are entitled to one free retraining session, but must rebook within 14 days. Those who do not apply for retraining within 14 days must pay a AUD 25 training materials fee again. This policy is set out in Clause 2.4 of the ANU Nanotechnology Laboratory User Guide published in April 2024.

External training alternatives

For remote collaborators who cannot attend on-campus training, ANU recognises equivalent training certificates from other ANFF nodes (such as the University of New South Wales and the University of Melbourne), provided the original training provider’s syllabus and exam results are submitted and approved by the ANU laboratory manager. The review usually takes 5 working days.

Activating and Maintaining Access After the Exam

After passing the access exam, users receive 12 months of independent cleanroom access. Access is tied to the ANU student or staff card and bound to the door control system. The ANU Safety Office reviews access rights every June and December; if a user has no experiment records for 6 months, their access is automatically suspended. To reactivate, users must complete a short online refresher module (about 30 minutes) and sign the latest safety declaration.

Upgrading your access rights

Users who need to operate high-precision equipment (such as the electron-beam lithography system) can apply for equipment-specific certification on top of basic access. This requires submitting records of at least 3 successful process runs, signed off by the equipment supervisor. ANU College of Engineering and Computer Science data for 2024 shows that about 35% of cleanroom users hold at least one equipment-specific certification.

Violations and penalties

Any violation of cleanroom rules (such as entering the Class 5 area without cleanroom garments or adjusting equipment parameters without authorisation) is recorded in the ANU laboratory violation system. A first violation draws a written warning, a second violation suspends access for 30 days, and a third violation results in permanent revocation of access. In 2023, ANU recorded 7 violations, 2 of which led to access suspensions.

Language and Adjustment Requirements for International Students

For international students whose first language is not English, ANU requires an overall IELTS score of at least 6.5 (no band below 6.0) to meet laboratory safety communication needs. Cleanroom training materials and exams are provided in English, but candidates are allowed to use a bilingual dictionary (paper version) in the written exam. A 2024 survey by ANU Student Services shows that about 8% of international students sitting the exam for the first time needed to retake it because they were “unfamiliar with emergency procedure terminology”.

Language support resources

The ANU Academic Skills Centre offers free Laboratory English workshops, held 3 times per semester at 2 hours each, covering chemical naming conventions, equipment operation verbs (such as “depressurize”, “align” and “vent”) and how to read safety notices. In 2023 the workshops attracted 47 international students, 89% of whom said they helped with the exam.

Cultural adjustment differences

Some international students come from countries without a strict cleanroom culture, so ANU’s training places special emphasis on behavioural norm differences — for example, no mobile phones in the cleanroom and no unsealed paper notebooks. These rules are covered in a dedicated section of the ANU 2024 orientation guide for new students.

FAQ

Q1: What is the pass rate for the ANU cleanroom training exam?

According to statistics released by the ANU Nanotechnology Laboratory in March 2024, the first-attempt pass rate is 72% for the written exam and 85% for the practical assessment, giving an overall first-attempt pass rate of about 61%. Those who fail can retrain once for free within 14 days.

Q2: What additional materials do international students need to attend training?

International students must provide a valid ANU student or staff card, plus an IELTS transcript (overall ≥6.5, no band below 6.0) or equivalent proof of English proficiency. If you hold an equivalent training certificate from another ANFF node, you can apply for a partial exemption, with a review period of 5 working days.

Q3: How much does cleanroom training cost?

Training is completely free for current ANU students and staff. Cross-institutional users (such as CSIRO researchers) must pay a AUD 50 temporary user fee. Retakes or late retraining incur a AUD 25 materials fee. These fees are clearly stated in the ANU laboratory user guide published in April 2024.

References

Australian National University, 2024, Laboratory Safety Manual (2024-2025 Edition)
Australian National Fabrication Facility, 2024, ANFF Equipment Inventory and User Guide
QS World University Rankings, 2023, Materials Science Subject Rankings 2023
ANU College of Engineering and Computer Science, 2024, Nanotechnology Laboratory Training Syllabus
Unilink Education, 2024, ANU Campus Facilities and Admission Database