1
Process Use and Furnace History
Review the intended oxidation, diffusion, anneal or specialty process, dry or wet operation where relevant, previously processed materials, and available tube, reactor and quartzware condition or process-history records.
Avoid selecting a machine that appears suitable by model name but has a former process use or contamination risk that does not fit the target product.
2
Thermal Profile and Temperature Control
Review the target temperature, ramp-up and ramp-down behavior, soak or spike capability, available uniformity information, heating zones, lamps and sensor configuration.
Avoid a system that reaches the target temperature but cannot meet the required thermal budget, ramp-rate or temperature-control conditions during qualification.
3
Wafer, Boat and Automation
Review wafer size and material, batch capacity, wafer boat and quartzware, cassette or FOUP format, loader, robot and transfer configuration.
Avoid purchasing a process-capable platform whose wafer size, boat or handling configuration cannot connect with the existing production line.
4
Atmosphere and Facility Requirements
Review process atmosphere, gas delivery, vacuum, exhaust and abatement, cooling, electrical load, safety interlocks and the included supporting systems.
Avoid receiving a machine before confirming that the available gas, vacuum, exhaust, cooling and utility infrastructure can support its actual configuration.
5
Long-Term Operating Condition
Review heater or lamp condition, available tube-condition information, seals, temperature sensors, controllers, software versions, maintenance records and known parts requirements.
Avoid adding a tool that works technically but creates excessive downtime, maintenance burden or replacement cost during production.