Scheda di revisione: Cleanroom Fundamentals

📋 Course Outline

1. Cleanroom Purpose and Filtration

📖 1. Cleanroom Purpose and Filtration

🔑 Key Concepts & Definitions

• Cleanroom : An enclosed area where airborne particles and molecular contamination from the atmosphere, personnel, equipment, and processes are reduced by controlling filtration, airflow direction and speed, pressure, temperature, and humidity.

★ Must-know

• Air entering the cleanroom passes through HEPA filters installed in the ceiling.

Further detail

• HEPA filters trap airborne dust, mist, smoke, fumes, and suspended microorganisms such as bacteria.

• Cleanroom contamination comes from the atmosphere and can also arise from operating personnel, equipment, and processes.

📊 Synthesis Tables

Cleanroom Classes

Class	Particle limit	Relative cleanliness	Maintenance and cost
Class 100	Less than 100 particles of 0.5 micron or larger per cubic foot of air	Cleaner than Class 1000	Harder to maintain and more costly than higher-number classes
Class 10	Less than 10 particles of 0.5 micron or larger per cubic foot of air	Cleaner than Class 100	Harder to maintain and more costly than higher-number classes