LCD / OLED panel fab — Electronics & flat-panel display
Gen 8.5+ fabs: ISO 4–6 array and cell rooms with tens of thousands of FFUs.
LCD / OLED panel fab is a segment of Electronics & flat-panel display. Below are the systems and equipment FacilityOS covers for it, filtered from the Electronics & flat-panel display solution.
How FacilityOS helps
- Cleanroom zones, FFU banks and particle counters for large-glass fabs.
- Ultrapure water, specialty gases, wastewater treatment and compressed air as utilities with efficiency KPIs.
- Gas detection and fire systems monitored only, with linkage verification after every event.
Systems and equipment
Core: every site of this kind has it. Common: most sites have it. Optional: depends on the site.
Chiller plant & PCW
Panel fabs have enormous cooling loads; the plant is the largest power user.
| Equipment | Level | Points worth watching | Notes |
|---|---|---|---|
| Large centrifugal chiller | Core | CHW supply temp · CHW return temp · Load · Power draw · Efficiency (kW/ton) · Fault | Thousand-ton centrifugals (Trane, York, Carrier, Daikin) on BACnet/IP, typically N+1. |
| Cooling tower cell | Core | Tower leaving water · Tower entering water · Fan speed · Basin level · Water conductivity · Fan vibration | |
| Pump | Core | Running · Speed · Differential pressure | Chilled and condenser water pumps; drives usually on Modbus TCP. |
| Process cooling water loop | Core | Supply temp · Return temp · Supply pressure · Supply-return differential · Loop flow · Loop conductivity · Leak detected | |
| Heat-recovery chiller / heat pump | Optional | Hot water supply temp · Chilled water supply temp (recovery side) · Power draw · Combined COP | Heat recovery displacing boiler gas — one of the main decarbonization levers. |
Cleanroom & environment
FFU-field availability, pressure and particles drive point-defect rates.
| Equipment | Level | Points worth watching | Notes |
|---|---|---|---|
| Make-up air unit | Core | Supply air temp · Supply dew point · Outdoor airflow · Fan speed · Final filter pressure drop · Fault | Dew-point control sets cleanroom humidity. |
| Fan-filter unit bank | Core | FFUs running · FFUs in fault · Average speed · Bank power · FFU network fault | Group by feeder or control segment; clustered failures usually mean a circuit. |
| Cleanroom zone | Core | Pressure vs adjacent · Room temp · Relative humidity · Downflow velocity · Target class (ISO 14644-1) · Door held open | Typical cascade 0.02–0.06 inWC (5–15 Pa). |
| Particle counter | Core | Particles ≥ 0.1 µm · Particles ≥ 0.3 µm · Particles ≥ 0.5 µm · Particles ≥ 5.0 µm · Measured class (ISO equivalent) · Above target ISO class | ISO 14644-1 limits are per m³; divide by 35.3147 for per ft³. |
| Cleanroom FMCS summary | Common | Worst zone particles ≥ 0.5 µm · FFUs in fault (all banks) · Zones out of spec | |
| Airborne molecular contamination monitor | Common | Acids · Bases (NH₃) | |
| Fab micro-vibration monitor | Optional | VC criterion met · Above tool spec |
Production equipment status
Reflow and AOI status on SMT lines.
| Equipment | Level | Points worth watching | Notes |
|---|---|---|---|
| Thermal oil heater | Common | Outlet oil temp · Low-flow trip |
CDA, nitrogen, specialty gas & chemicals
Array uses silane, ammonia and NF3; wet processes use developer, stripper and etchants.
| Equipment | Level | Points worth watching | Notes |
|---|---|---|---|
| Clean dry air compressor | Core | Discharge pressure · Output · Load · Power draw · Surge detected · Fault | |
| Desiccant air dryer | Core | Pressure dew point · Pressure drop · Regeneration temp · Fault | Typical pressure dew point −94°F (−70°C). |
| CDA header | Core | Header pressure · Header dew point · Demand | |
| Bulk gas supply | Core | Tank level · Supply pressure · Vaporizer outlet temp · Flow · Impurity · Reserve supply in use | N2, O2, Ar, H2, CO2; tank telemetry is usually the gas supplier's. |
| On-site nitrogen generator | Common | Product O2 content · Output · Outlet pressure · Off-purity (on LIN backup) | |
| Specialty gas cabinet | Core | Cylinder pressure · Delivery pressure · Cabinet exhaust · Excess-flow trip · Auto-shutoff valve closed | |
| Valve manifold box | Common | Distribution pressure · Enclosure gas detected · Auto-shutoff valve closed | |
| Specialty gas usage meter | Common | Current use · Used today (scf) · Days of supply left | |
| Bulk chemical delivery system | Core | Supply tank level · Day tank level · Supply pressure · Supply flow · Drip-pan leak · Double-containment leak · Auto-shutoff valve closed | TMAH developer can be fatal through the skin; treat its leaks at top priority. |
| Process vacuum pump | Common | Inlet pressure · Motor power · Service warning | |
| Chemical dilution unit | Common | Outlet concentration · Leak · Concentration alarm | |
| Nitrogen purifier | Common | Outlet O₂ |
UPW & wastewater
Panel cleaning uses enormous volumes of UPW.
| Equipment | Level | Points worth watching | Notes |
|---|---|---|---|
| Reverse osmosis unit | Core | Permeate conductivity · Permeate flow | |
| Electrodeionization unit | Core | Product resistivity · Product flow | |
| UPW polishing loop | Core | Supply resistivity · TOC · Supply flow · Supply pressure · Storage tank level | Panel fabs commonly run ≥ 17 MΩ·cm. |
| Water reclaim system | Common | Reclaim flow · Reclaim rate · Diverted to drain (off-spec) | |
| pH neutralization system | Core | Effluent pH · Caustic dosing · Flow | |
| Final effluent monitor | Core | Discharge flow · Discharge pH · COD | |
| Domestic water booster | Common | Discharge pressure · Flow | |
| Resistivity analyzer | Common | Resistivity |
Wet-bench exhaust & abatement
Wet-bench exhaust and scrubbers protect people and the permit.
| Equipment | Level | Points worth watching | Notes |
|---|---|---|---|
| Process exhaust system | Core | Exhaust main static · Exhaust airflow · Fans running · Low exhaust static | Wet-bench exhaust (acid, alkali and solvent kept separate). |
| Acid exhaust scrubber | Core | Recirculation pH · Recirculation flow · Packing pressure drop | |
| Alkaline exhaust scrubber | Core | Recirculation pH · Recirculation flow | |
| VOC concentrator | Core | Outlet VOC · Removal efficiency | |
| Point-of-use abatement | Common | Combustion / reaction temp · Bypassed (untreated) |
Power & sub-metering
Meter array, cell, module and CUB separately.
| Equipment | Level | Points worth watching | Notes |
|---|---|---|---|
| Medium-voltage switchgear | Core | Bus voltage · Incoming current · Real power · Breaker closed · Protective trip · Relay trouble | Monitor only — never operate breakers. |
| Low-voltage switchgear | Core | Bus voltage · Load current · Real power · Power factor · Current THD · Breaker trip | |
| Power transformer | Core | Top-oil temp · Winding temp · Load · Gas / sudden-pressure alarm · Over-temperature alarm | |
| UPS | Core | Load · Battery runtime · On bypass | SNMP v3 (UPS-MIB). |
| UPS battery string monitor | Core | String voltage · Lowest jar voltage · Highest jar voltage · Highest jar internal resistance · Highest jar temp · State of charge | Per-jar resistance trending (one of the maintenance practices in IEEE 1188). |
| Generator | Common | Running · Output power · Fuel tank level · Starting battery voltage · Not in AUTO | |
| Power quality meter | Common | Voltage THD · Current THD · Voltage sags today · Sag / interruption event | Voltage sags are a common hidden cause of trips. |
| Site utility meter | Core | Site power · Site power (MW) · Energy today · Power factor | |
| Area energy meter | Core | Area power · Energy today · 15-min demand · Power factor | Sub-metering by workshop or system for energy analysis and cost allocation. |
| Natural gas meter | Common | Natural gas flow · Heat input (1,037 BTU/scf) · Gas today (scf) | Natural gas in scfh, converted to BTU/h by heating value. |
| Active harmonic filter (APF) | Common | After current THD · Unit load · Modules in fault · Fan fault | |
| Dynamic voltage restorer (DVR) | Optional | Sags corrected today · On bypass | |
| Partial discharge monitor | Common | Discharge magnitude | |
| Tool PDU / EMO | Common | EMO pressed |
Life safety Monitor only
Gas monitoring, chemical leaks and fire. Monitor only.
| Equipment | Level | Points worth watching | Notes |
|---|---|---|---|
| Gas monitoring system | Core | Active alarms · Active faults · Auto-shutoff activated · Evacuation alarm | The GMS performs the shut-off interlocks; the platform only monitors. |
| Silane detector | Core | Silane (SiH4) · Alarm 1 (low) · Alarm 2 (high) | |
| Ammonia detector | Core | Ammonia level · Ammonia alarm | |
| NF3 detector | Common | Nitrogen trifluoride (NF3) · Alarm 1 (low) · Alarm 2 (high) | |
| HF detector | Common | Hydrogen fluoride (HF) · Alarm 1 (low) · Alarm 2 (high) | |
| Oxygen deficiency monitor | Core | Oxygen · Alarm 1 (O2 below 19.5 %) · Alarm 2 (O2 below 18 %) | Nitrogen and inert-gas areas: 19.5 % and 18 % stages. |
| Leak detection cable | Core | Leak detected · Distance to leak · Leak zone · Cable break or contamination | |
| Fire alarm zone & linkage | Core | Fire alarm · Supervisory · Trouble · Linkage: air handlers stopped · Linkage: fire/smoke dampers closed · Linkage: smoke exhaust running · Linkage: elevators recalled | Linkage proofs verify the fire system did what it should. |
| Fire alarm panel | Core | Fire alarm · Supervisory signal · Trouble signal | Monitor only (NFPA 72). |
| Aspirating smoke detector | Common | Smoke obscuration (%/ft) · Alert · Action · Fire 1 · Airflow fault | |
| Smoke exhaust fan | Common | Running · Damper not proven | Smoke exhaust or stair pressurization fans; monitor only. |
Security & video Monitor only
Camera and door status, and video linkage: cameras are linked to areas, devices and alarm rules; on an alarm the gateway takes an ONVIF snapshot and attaches it to the alarm, with a live-view link to the NVR/VMS. Core never contacts a camera.
| Equipment | Level | Points worth watching | Notes |
|---|---|---|---|
| Video camera | Common | Online · Recording · Motion detected · Video analytics alarm · Tamper (blocked or moved) | Status via the VMS (Milestone, Genetec…); on an alarm the gateway takes an ONVIF snapshot and attaches it to the alarm — Core never contacts a camera. |
| Access-controlled door | Common | Door open · Door held open · Door forced | Door events can drive camera linkage. |
Life-safety equipment (fire alarm, gas detection, emergency power transfer) and protection devices are monitored only. FacilityOS never sends them commands.
Standards and compliance
| Standards and compliance | Notes |
|---|---|
| ISO 14644-1 | Cleanroom classification; array areas commonly ISO 4–5, cell and module ISO 6–7. |
| SEMI S2 | Equipment EHS guideline, widely applied to FPD tools. |
| NFPA 318 | Fire protection for semiconductor fabrication facilities, commonly applied to FPD fabs. |
| ANSI/ESD S20.20 | ESD control program for electronic parts and assemblies. |
| IPC J-STD-001 | Requirements for soldered electrical and electronic assemblies. |
| IPC-A-610 | Acceptability of electronic assemblies. |
| IPC/JEDEC J-STD-033 | Handling of moisture-sensitive devices (tied to floor humidity). |
| NFPA 72 | National Fire Alarm and Signaling Code. |
| IEC 62443 | Industrial automation and control system security. |
Standards are listed with what they cover; numeric values are typical figures, not requirements for every site. FacilityOS supports your compliance work; it does not certify a site.
Segments of Electronics & flat-panel display
Full Electronics & flat-panel display solution →
How we deliver
We can take a Electronics & flat-panel display project from survey and design through procurement, installation, commissioning and training — all of it, or only the stages you need.