The danger in a cleanroom is invisible. When special gases leak, you cannot smell them and have no time to react.
Safety risks at semiconductor fabs have two characteristics:Invisible(a colourless, odourless gas) andQuick results(asphyxiation and poisoning within minutes).
Before entering a cleanroom, students usually get only one induction and cannot remember so many prohibitions.
The more realistic problem: cleanroom behaviour rules are extremely tedious, but the consequences of breaking them can be fatal.
| Risks | Possible consequences | Course link points |
|---|---|---|
| Special gas leak | Asphyxiation, poisoning, explosion | Gas types, detection and alarm, evacuation routes |
| Chemical splashes | Burns, inhalation | Chemical classification, location of safety showers and eyewash stations |
| Cleanroom violations | Contamination, cross-contamination | Cleanroom behaviour rules and gowning procedure |
| No tag during maintenance | Electric shock, mechanical injury | Energy isolation before maintenance |
| Wrong evacuation procedure | Secondary harm | Knowing evacuation routes and assembly points |
This table is the basis for course design: a risk with no corresponding action is a risk that has not been taught properly.
These are not hypotheticals; they recur on the training floor. Each item spells out what went wrong, what the right action is and why.
The distance between the lectern and the workbench is longer than you think. This section is about how we turn knowing into doing.
Every item can be ticked; no vague wording like 'basically mastered'. A teacher can score straight from this sheet.
| Assessment items | What counts as passing | What leads to an immediate fail |
|---|---|---|
| Gowning procedure | Done in sequence; hair and cuffs fully covered | Missing one item = fail |
| Special gas operations | Check the alarm first, then operate, then reset | Skipping the alarm check = fail |
| Chemical handling | Rinse for 15 minutes immediately after a splash | Wiping first means a fail |
| Energy isolation | All four steps covered: de-energise, relieve pressure, lock, verify | Skipping pressure relief or lockout = fail |
| Emergency evacuation | Walk from the assigned workstation to the exit within the time limit and by the correct route | Taking the wrong route = fail |
Real sites rarely have work that belongs to only one direction. This section covers where risks compound.
| Modules | Class hours | Content |
|---|---|---|
| Cleanroom fundamentals | 2 class hours | Cleanliness classes, gowning procedure, behaviour rules |
| Special gases | 2 class hours | Common specialty gases and their risks, detection and alarms, escape essentials |
| Chemical safety | 2 class hours | Segregated storage, SDS, spill response, eyewash use |
| Equipment and maintenance | 1 class hour | Energy isolation, lockout/tagout, maintenance access control |
| Emergency drills | 2 class hours | Response procedures for leaks, fire and evacuation |
Total class hours can be adjusted to the school's training schedule; when compressing, merge awareness modules first and keep hands-on and emergency content.
| Dimension | Form | What is assessed |
|---|---|---|
| Theory | Closed-book, 40 questions | Gas identification, chemical handling, evacuation rules |
| Hands-on practice | Gowning and behaviour | Complete gowning to procedure and demonstrate correct cleanroom behaviour |
| Emergency | Scenario drills | Given a leak scenario, state the evacuation and protection decisions |
Failing theory means no hands-on practice; failing practice means retraining. We recommend putting this rule into the practical training regulations.
Send us the school's practical training equipment list and we will return course priorities based on the actual equipment.
Send the equipment list