Semiconductor FAB factory FAQ100 ask
What are the main factors affecting the cost of the factory?
A: Direct Material, such as: Indirect Material, such as gas... Labor Manpower Fixed Manufacturing machine depreciation, maintenance, research costs, etc. Costs of other related units of ProducTIon Support
What are the indirect materials in the FAB?
A: Gas gas Chemical acid, alkali chemical liquid PHOTO Chemical photoresist, developer Slurry slurry Target target Quartz quartz material Pad & Disk polishing pad Container wafer box Experimental chip
What is Variable Cost?
A: The cost increases or decreases with the increase or decrease of production volume. For example: direct materials, indirect materials
What is Fixed Cost?
A: This cost has nothing to do with production, but keeps a fixed amount with each period. For example: equipment rent, house depreciation and depreciation
Does Yield affect the cost? How to influence?
A: Fab yield= If no scrap is generated, the input is exactly equal to the output, then the cost is the smallest. CP Yield: CP Yield refers to the number of valid ICs obtained on a chip. The greater the number of effective ICs on the production chip, the greater the benefit from the same manufacturing time.
What is the impact of the Cycle TIme on cost?
A: The shorter the production cycle, the lower the factory manufacturing cost. The positive benefits are as follows: (1) The less work-in-progress that accumulates on the production line (2) The less accumulation of production materials (3) The savings in management costs (4) The short delivery time of products, the trust of customers, and the establishment of corporate reputation
FAC
How many systems are exhausted according to process requirements?
A: It is divided into four systems: General Exhaust, Scrubbers, Ammonia and Solvent.
Does the raised floor have holes and holes?
A: The circulating air can be circulated, no dust, and ensure the cleanliness in the clean room; anti-static; easy to HOOK-UP.
Ion emission system
A: Ion emission system to prevent static electricity
SMIC clean grade division
A: Mask Shop class 1 & 100Fab1 & Fab2 Photo and process area: Class 100Cu-line Al-Line OS1 L3 OS1 L4 tesTIng Class 1000
What is a process vacuum system (PV)
A: It is to provide the process vacuum required in the manufacturing process of the clean room production and test machine in the factory; such as vacuum pen, photoresist coating, vacuum source for suction chip. The system provides a certain vacuum pressure (vacuum degree greater than 80 kpa) and flow rate, running 24 hours a day
What is MAU (Make Up Air Unit), the role of the new air conditioning unit
A: Provide the fresh air required for the clean room, control the humidity, temperature, and cleanliness of the fresh air to maintain the positive pressure and humidity requirements of the clean room.
House Vacuum System
A: The HV (House Vacuum) system provides a vacuum source for cleaning and collecting dust particles in the clean room process area and the return air area, and the vacuum is low. The method of use is to open the running power supply by using a hose to connect a vacuum suction hole that has been installed under the raised floor or in the column. The use of this system can reduce pollution during cleaning.
Filter Fan Unit System (FFU) function
A: The FFU system guarantees a certain wind speed and cleanliness in the clean room, consisting of Fan and Filter (ULPA).
What is the Clean Room Clean Room System?
A: The cleanroom system supplies the environmental requirements such as cleanliness, temperature, humidity, positive pressure, and airflow conditions required for the process and machine equipment.
Clean room spec: standard
Answer: Temperature 23 °C ± 1 °C (Photo: 23 °C ± 0.5 °C) Humidity 45% ± 5% (Photo: 45% ± 3%) Class 100 Overpressure +15paAir velocity 0.4m / s ± 0. 08m/s
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