What field data is needed for chemical filtration of the air inlet of lithography equipment?

For chemical filtration of the air inlet of lithography equipment, you need to understand the equipment gas control requirements, inlet composition, air volume, temperature and humidity, and check the installation space, air path and maintenance interface. Room background data does not automatically represent equipment air intakes. The selection data filtered on the device side is more specific than the room-level solution because it faces the microenvironment inside the device.

1. Limit the detection range based on equipment requirements

Specific sensitive ingredients, target levels and allowed materials should be derived from corresponding process equipment requirements. Detection capabilities need to be confirmed rather than just submitting routine TVOC or particle results.

The sensitivity of lithography equipment to alkaline gases, acidic gases, or organic condensates depends on the specific process and materials. Equipment manufacturers usually give the gas control requirements for the air inlet. When selecting models, the detection objects should be determined according to these requirements, rather than just submitting a total TVOC amount. Aili Industry isthe chemical filter equipment, confirm the media configuration according to the equipment gas requirements and inlet conditions.When supporting FFU chemical filter can be used with FFU for equipment-end circulation filtration. The relationship between levels and filtering requirements can be found inISO cleanliness level comparison。

2. Preserve entrance and internal information

The position of the air inlet, local material release and operating conditions all affect the protected area. It should be stated whether there are any new sources after the filter section to avoid testing only the filter element outlet.

The air condition at the device's air inlet may differ from the room background. When the air inlet is located close to the cleaning area or adjacent to other equipment, the actual gas load may be higher than the room average. At the same time, there is still material released inside the equipment after the filter section, and the acceptance point should be set at a protective position rather than at the outlet of the filter element. Aili Industry isFlat chemical filters andIn the V-type chemical filter package, the structure is confirmed according to the internal space and air flow path of the equipment. The relationship between portal data and internal sources can be referred toHEPA FAQs and Selection Guide。

3. Examples of project judgment

When the air inlet of the equipment is adjacent to the cleaning area, inlet sampling can be added during operation and the subsequent air flow of the chemical filter section can be checked.

Such situations indicate that room average data are insufficiently representative of equipment entrance conditions. Sampling should be taken at the location of the air inlet of the equipment and during cleaning operations, and then combined with the air flow path after the filter section to confirm the protection effect.

4. Application Check Points

5. Verification and subsequent use

Process areas, equipment entrances and protected locations may have different air conditions. Inspection points should be set up around the actual product or equipment usage location, and normal operation records should be kept. Environmental filtration can work with source, material and airflow measures, but cannot automatically cover contamination in unfiltered sections.

Aili Industry isIn the chemical filter equipment end plan, check the filter section configuration according to the equipment air inlet conditions and internal space.Box-type chemical filters are suitable for centralized treatment scenarios.

6. Related questions and answers

Can room gas data be representative of equipment intakes?
cannot. Equipment air inlet location, adjacent equipment, and internal releases may all cause actual conditions to differ from the room average.

What gases need to be measured at the air inlet of lithography equipment?
It is determined according to the gas control requirements given by the equipment manufacturer, which usually involves specific components such as alkaline, acidic or organic condensate.

Is it enough to only measure the total amount of TVOC?
not enough. TVOC is a comprehensive indicator that cannot reflect whether specific components meet equipment requirements and requires targeted testing.

7. Related articles

Chemical filter product series

FFU chemical filter

Flat chemical filter

HEPA FAQs and Selection Guide

8. Key points for selection and acceptance inspection

9. Aili Industrial products and equipment supporting equipment

Aili Industry provides chemical filters and clean air supply equipment selection packages. It can compare FFU package, box type, flat type and V-shaped products according to gas composition, treatment air volume and installation conditions. The manufacturing and supporting system covers the independent research and development and production of motors and fans, control systems, sheet metal, air filters and complete machine assembly, making it easy to jointly confirm the filter section, power and structural conditions. The specific gas effect, environmental suitability and service life still need to be verified based on the corresponding configuration data and actual working conditions.

learnChemical filter product series , check the products and air supply matching according to the project conditions. Clarify the goal → Check the conditions → Verify the effect → Arrange maintenance.