How to configure the semiconductor front-end equipment EFU? Clean area, uniformity and interface confirmation

Semiconductor front-end equipment is often sensitive to local environmental controls. EFU configuration should start from the wafer or critical process path, clarify which areas require continuous clean air supply, and then determine the number, location, air volume, filtration efficiency and control mode of units based on the equipment structure.

Delineate key clean areas

First mark the wafer transfer, opening and closing chamber, robot operation and temporary exposure areas. Different areas have different pollution risks and air supply needs, so it is not appropriate to evenly allocate EFU based on the appearance of the equipment.

Mean wind speed and uniformity are specified simultaneously

The total air volume can be calculated, but the equipment effect also depends on the distribution of multiple measuring points. The measurement plane, grid, target average value and allowable deviation should be clearly defined, and the changes before and after the mechanism movement should be considered.

Evaluate ultra-thin and small-format solutions when space is limited

If the top height is limited, ultra-thin or small-sized EFU can be used, but the air inlet space, filter area, fan residual pressure, noise and maintenance direction need to be reviewed. The 70mm overall height solution is suitable for some space-restricted equipment and still needs to be confirmed according to the picture.

Select filters that match process goals

Efficiency levels such as H13, H14, U15, and U16 can be selected according to the project, and the resistance, rated air volume, sealing and leak detection requirements can be checked at the same time. Higher efficiency should not be determined independently of fan and system resistance.

Incorporate EFU into device control logic

Confirm EFU actions during equipment startup, standby, process operation, maintenance and alarm status. When linkage is required, power, communication, address, status feedback and failure strategies should be defined.

Complete verification through prototype or first unit

Test air volume, key point wind speed, uniformity, particles, noise, power and continuous operating status under conditions close to the real structure, and solidify the confirmation results into batch configuration.

FAQ

Is ULPA required for semiconductor equipment EFU?

Not necessarily, the efficiency level should be chosen based on process and customer specifications.

The more EFU, the better the cleaning effect?

Not necessarily, the number should match the coverage, return air and equipment structure. Too much may increase airflow interference.

Why test under actual device structure?

The mechanical mechanism and shield will change the air flow, and the no-load air outlet data cannot fully represent the process location.

How Aili Industry cooperates with the semiconductor front-end equipment EFU project

When configuring EFU for semiconductor front-end equipment, you should first clarify the clean area that needs to be protected, air supply direction, target wind speed, wind speed uniformity and filtration efficiency. The process area, mechanical structure and heat source distribution inside different equipment are different, so the number, size and installation location of EFU need to be determined based on the actual equipment drawings.

In addition to clean air supply, the available space of the equipment, air inlet conditions, filter replacement method, power supply, communication interface and control logic should also be confirmed. For equipment with limited height, 70mm ultra-thin EFU or small-size DC EFU solutions can be evaluated.

Aili Industry can provide matching EFU machines, fans, motors, control systems, sheet metal structures and air filters, and conduct non-standard designs based on equipment drawings. The project can first check the air volume, static pressure and wind speed uniformity through prototype testing, and then solidify the structure and control parameters required for mass production.

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Conclusion: Semiconductor front-end equipment EFU should be configured around key process areas. The key points of selection include the internal space of the equipment, air supply coverage, wind speed uniformity, filtration efficiency, structural shielding, maintenance direction and control linkage.