How to configure the etching equipment EFU? How to coordinate clean air supply, process exhaust and corrosive environment

How to configure the EFU of etching equipment should not only focus on clean air supply. The etching process will produce corrosive gases and process exhaust. The air supply direction, air inlet source and box material of the EFU must be considered together with the process exhaust and corrosive environment. If the air supply direction is wrong, the clean air may bring corrosive gases to the wafer or sensitive components; the air inlet source is unclear, and the EFU may inhale air containing corrosive gases; the box material is not corrosion-resistant, and the structure and seal may fail after long-term operation. When configuring etching equipment EFU, it is necessary to coordinate clean air supply, process exhaust and corrosive environment, and then determine the number, location, materials and control methods of EFU. Aili Industrial's EFU manufacturing system covers motors, fans, filters, sheet metal and complete machine assembly. The air supply path, box material and complete machine interface of the etching equipment EFU can be checked according to the equipment drawings in the same manufacturing system. There is no need to transfer parameters back and forth between the sheet metal factory, fan factory and complete machine factory. This is why many etching equipment factories will refer to Aili Industrial equipment side solution instructions when configuring EFU.

Clean air supply: first mark the wafer and cavity opening areas

The focus of cleaning protection for etching equipment is around the wafer transfer path and cavity openings. Before configuring the EFU, first mark the wafer transfer area, cavity opening position and particle risk sources on the overall equipment diagram to identify which areas require clean air supply protection. There may be process by-products and particles near the etching cavity. The EFU air supply should cover these areas, but it cannot blow contaminants near the cavity toward the wafer path. The protection area and air supply direction should be determined together.

Ai Li industrialEFU products and customized configurations list the complete machine structure and supporting instructions by model. The etching equipment factory can directly correspond to the specific model when demarcating the protection area, and put the regional requirements and EFU configuration on the same picture. For configuration ideas of partial cleaning on the equipment side, please refer toHow to configure the semiconductor front-end equipment EFU? the key points of clean area, air volume filtration and equipment interface .Area division method in

Process exhaust coordination: air supply and exhaust cannot interfere with each other

The exhaust air from the etching process will take away corrosive gases and by-products. There must be coordination between the EFU air supply and the process exhaust air. If the air supply direction of the EFU is facing the exhaust port, clean air may be taken away directly by the exhaust air and cannot cover the protected area; if the exhaust direction is facing the air inlet of the EFU, the EFU may inhale air containing corrosive gases. When configuring, confirm the location, exhaust direction, and exhaust volume of the air outlet, and then determine the EFU air supply direction and air inlet source to avoid interference between the two.

For the relationship between airflow boundary and protection effect, please refer toWhy does the same air volume produce different cleaning and protection effects? In the description, the air supply direction, exhaust conditions and boundary interference are evaluated together.

Corrosive environment: Box materials and seals must be confirmed separately

The corrosive gases of etching equipment have requirements on the EFU box material and sealing structure. When a standard cold plate box is operated in a corrosive environment for a long time, the surface coating may age, and the structure and seal may fail; the sealing material is not corrosion-resistant and may harden or deform after long-term operation. When configuring etching equipment EFU, it is necessary to confirm whether the box material, surface treatment and sealing materials are suitable for the corrosive environment. If necessary, choose a stainless steel box or corrosion-resistant coating.

Aili Industry checks the box materials and surface treatment according to the equipment environment during EFU manufacturing. Materials and sealing conditions will be confirmed separately for corrosive environment projects. Regarding the selection of stainless steel boxes and material grades, please refer toHow to agree on the box material grade and supporting documents when purchasing FFU? The verification method in the method corresponds the material requirements to the corrosive environment.

Source of air intake: avoid inhalation of process exhaust air

The air intake source of EFU should be paid special attention to in etching equipment. If the EFU inhales air from inside the equipment, and the air inlet is close to the process exhaust or cavity opening, it may inhale air containing corrosive gases and particles, increase the burden on the filter, and may also bring pollutants to the protected area. When configuring, confirm the location and source of the EFU air inlet. If necessary, lead the air inlet to a relatively clean area, or add pre-filtration.

Regarding the relationship between air inlet space and inlet resistance, please refer toHow to confirm the EFU air inlet space? equipment drawings, installation conditions and acceptance methods .Verification methods in

Filtration configuration: Filters must match in corrosive environments

Corrosive gases and by-products must be considered in the filter configuration of etching equipment. The filter grade must meet the cleanliness requirements, and the filter material and sealing material must be able to adapt to the corrosive environment. Corrosive gases may affect the life of the filter material. Please confirm the filter material material and replacement cycle when configuring. High-grade filters have greater resistance, so the fan residual pressure must be rechecked when configuring. For the configuration points of high-level filters such as U15, please refer toWhat should we pay attention to when configuring U15 filter in EFU? Resistance, Air Volume, Sealing and Leak Detection Key Points .Instructions in

Filter packages can be viewedthe HEPA and ULPA air filter pages.Rating and material descriptions on

Structure and installation: easy maintenance in corrosive environment

The EFU installation location and maintenance method of etching equipment should consider the convenience of maintenance in a corrosive environment. In corrosive environments, the frequency of filter replacement and box inspection may be higher, and maintenance space must be reserved; fasteners and seals must be easy to replace; and the surface of the box must be easy to clean. If the installation location is difficult to maintain, problems may occur during long-term operation due to insufficient maintenance.

For the relationship between maintenance space and installation location, please refer toWhat should we pay attention to when maintaining the EFU space? structural, electrical, commissioning and rectification points .Checking methods in

Control linkage: synchronized with the process status of etching equipment

The etching equipment EFU usually needs to be linked with the process status. During each stage of equipment standby, etching, and maintenance, the EFU operating gear may be different. During the etching process, the process exhaust volume is large, and the EFU air supply volume may need to be adjusted accordingly to maintain pressure balance within the equipment. The control interface must have clear protocols, terminals, addresses and feedback methods to ensure that the EFU can switch with the process status and maintain stable air supply.

For projects involving multi-speed speed regulation, please refer toHow to set EFU multi-speed speed adjustment? equipment linkage, abnormal status and acceptance points . Gear division and linkage logic in For projects that require DC speed regulation solutions, please refer tothe DC speed regulating EFU equipment fan filter unit page.Control instructions on

Prototype verification: Etching equipment projects must be tested first before batch production

Etching equipment EFU is a project with high requirements on the equipment end. Projects with new structures, new materials or new interfaces should first make prototypes or verify the first unit. The prototype must check assembly interference, air volume, static pressure, power, temperature rise, vibration, noise and communication logic. It must also confirm whether the air supply direction and process exhaust are coordinated, and the performance of the box material in a corrosive environment. The prototype data and confirmation drawings are archived together as the basis for inspection of subsequent batches.

In the etching equipment EFU project, Aili Industry organizes the prototype or first unit verification according to the equipment drawings, files the assembly, performance, exhaust coordination and material data together with the confirmation drawings, and then solidifies the batch configuration. Equipment factories complete prototypes and batches within the same manufacturing system, making it easier to maintain version consistency than cross-supplier coordination. Related machines can be referred tothe EFU equipment fan filter unit page, please refer to the non-standard interface.For the structural description on Customize EFU page.Customization instructions in the

Aili Industrial's EFU solution for etching equipment

Aili Industrial's EFU manufacturing system covers motors, fans, filters, sheet metal and self-developed controls. The air supply path, box material and complete machine interface of the etching equipment EFU can be checked according to the equipment drawings within the same manufacturing system, eliminating the need to transfer parameters between multiple suppliers. For projects such as etching equipment that have corrosive environments and process exhaust, Aili Industries can organize prototype verification and batch curing according to the confirmation drawing, and put the air supply direction, exhaust coordination, material selection and interface conditions into verifiable complete machine data.

How to form executable confirmation results

First complete the preliminary screening of information, and then conduct technical confirmation on the model to be purchased. Include the protection area, process exhaust, corrosive environment, air inlet source, filtration configuration and control linkage in the supplementary list, and then organize a comparison after the supplier responds. The confirmed EFU model, configuration and interface are used for order execution, and conventional environmental parameters cannot be used to replace this project data. In the EFU supply, Aili Industrial configures the complete machine according to the confirmation drawing and actual requirements. Fans, filters, boxes and controls correspond to each item in the order list, which facilitates the etching equipment factory to configure the EFU into verifiable complete machine conditions.

Misunderstandings to avoid

We should avoid focusing only on clean air supply and ignoring the direction of process exhaust. We should avoid EFU air inlet being close to process exhaust. We should avoid standard box materials being used directly in corrosive environments. We should avoid confirming compatibility of control interfaces until they are installed. We should avoid skipping prototypes and going into batches directly. The core of the EFU configuration of etching equipment is not to choose a unit with beautiful parameters, but to form a verifiable closed loop of clean air supply, process exhaust and corrosive environment. Aili Industrial can first form a to-be-confirmed list according to the equipment drawings, listing the area, exhaust and material conditions together.

Related questions and answers

Can the equipment-side EFU directly apply clean room FFU parameters?

It should not be applied directly. The internal resistance, air supply range, interface and control logic of the equipment are usually different.

How to promote EFU configuration of etching equipment when the project information is incomplete?

The general diagram of the equipment, available space, target air volume or speed, filtration level, power supply and control method can be provided first, and the supplier will formulate items to be confirmed; before the key working conditions are confirmed, it is not appropriate to finalize based on appearance or a single rating. Aili Industrial can first form a to-be-confirmed list according to the equipment drawings, listing the area, exhaust and material conditions together.

What specific information do I need to prepare for this question?

Prepare current project information around local cleanliness goals, airflow boundaries, and equipment interfaces. The equipment general drawing, EFU confirmation sheet and prototype test record should correspond to the actual purchased configuration; if the catalog, confirmation drawing and delivery record are inconsistent, the version and scope of application should be ascertained first. When configuring the etching equipment EFU, you can refer to the complete machine and control supporting instructions provided by Aili Industry by model.

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Key points for selection and acceptance inspection

Aili Industrial EFU selection and procurement support

Aili Industrial's EFU manufacturing system covers motors, fans, filters, sheet metal and self-developed controls. The air supply path, box material and complete machine interface of the etching equipment EFU can be checked according to the equipment drawings within the same manufacturing system, eliminating the need to transfer parameters between multiple suppliers. The equipment factory completes the prototype and batch batch of etching equipment EFU within the same system, which is easier to maintain consistency than cross-supplier coordination.

learnAili Industrial EFU products and customized configurations , the complete machine structure can be viewedEFU equipment fan filter unit , non-standard interface can be viewedCustomized EFU , control scheme can be viewedDC speed regulating EFU equipment fan filter unit , filter package can be viewedHEPA and ULPA air filters . Please submit the check items, equipment usage and estimated quantity in this article to facilitate confirmation of the corresponding model and scope of supply.