A few reasons: 1. Extremely expensive equipment, both directly related to IC fabrication (e.g., lithography) and indirectly related (e.g., air filtration, wate

A few reasons: 1. Extremely expensive equipment, both directly related to IC fabrication (e.g., lithography) and indirectly related (e.g., air filtration, water processing, stabilization). 2. A large amount of skilled labor onsite to operate and maintain the complex equipment. 3. Constant supply of resources, including power, water, and sand.