Lithoprotect® Yellowlight products for the Yellow Room
UV-filter ideal for photolithography
Yellow Foil Requirements
The spectral sensitivity of common photo resists ranges from the near UV to the visible blue part of the spectrum. Most of our resists are sensitive to g-line (435 nm wavelength). This wavelength is centered in the visible blue part of the spectrum and drops towards longer wavelengths without sharp absorption edge.
Therefore, in order to allow the storage of a resist-coated substrate under yellow-light conditions over hours without unintentionally exposing the resist film, wavelengths < 500 nm have to be completely blocked below the detection limit.
At the same time, wavelengths > 540 nm which correspond to the sensitivity maximum of the human eye should be sufficiently transmitted by the yellow foil. Both requirements allow a safe and reproducible resist processing with reasonable energy consumption for the clean room illumination.
Our self-adhesive Lithoprotect® yellow foil YSA520E212
The Lithoprotect® self-adhesive UV protection yellow film YSA520E212 was specially developed for UV photo-sensitive applications and blocks UV radiation below 520 nm. The Lithoprotect® UV-protective film YSA520E212 consists of yellow-dyed cellulose triacetate and is coated on one side with a permanent dispersion glue, thus it can bubble-free all-over laminated on all solid surfaces. By full-surface bonding as on windows, room dividers and screen elements, it provides a reliable UV protection even in demanding applications. The Lithoprotect® YSA520E212 UV-blocking filter is commonly used in the field of photolithography, the PCB and microelectronics manufacturing and photoresist preparation and the handling of photoresists and diazofilms.
Our Lithoprotect® yellow foil Y520E212
The Lithoprotect® yellow foil Y520E212 completely blocks all radiation with wavelengths < 500 nm, and yields a high transparency for wavelengths > 540 nm. Thus the yellow foil is perfectly suited for the processing for all common photo resists. The Lithoprotect® UV-protective foil Y520E212 can be processed comparable to paper. You can use double-sided adhesive tape stuck to windows, privacy screens, room dividers, lamps and front openings. We recommend, however, for large windows applications, to use the self-adhesive UV-protection yellow film YSA520E212.
Our Lithoprotect® UV-filter tube Y520E212 T5/T8
For fluorescent tubes of size T5 and T8
The Lithoprotect® UV-filter tube Y520E212 T5/T8 have the same characteristics as the yellow foil. With these features the Lithoprotect® UV-filter tube Y520E212 T5/T8 is suitable for applications in yellow rooms and laboratories in which UV-sensitive materials and products are being used and processed. A clear polycarbonate tube forms the outer casing of the filter tube, which has inside a layer of yellow-dyed cellulose triacetate foil. Due to the type of filter material, a reliable UV protection can be achieved even for challenging applications or purposes. The Lithoprotect® Y520E212 UV-filter tube T5/T8 is commonly used in the field of photolithography, the field of PCB, microelectronics manufacturing, photoresist fabrication, and handling of photoresists and diazofilms or other UV sensitive devices or components. With the Lithoprotect® UV-filter tube Y520E212 T5/T8 it is possible to get a UV-free light source from a standard T5/T8 fluorescent tube.
Our Lithoprotect® accessories
Lithoprotect® seam tape
The Lithoprotect® seam tape YST520E212 is made of the same material as the self-adhesive UV protection foil YSA520E212. For this reason, all data and properties for the UV protective foil also apply to the seam tape. Field of use: If the surface to be covered with yellow foil is broader than the roll (which has a width of 108 cm), you can stitch two pieces of foil side by side and cover the abutting ends with the special Lithoprotect® seam tape YST520E212. With the seam tape you can be sure, that no UV light will tunnel into your room. This seam tape you can use as well for covering the edges between the foil and the window frame. Detailed information is available in our assembly instructions for Lithoprotect® self-adhesive UV-protection yellow foil YSA520E212.
Lithoprotect® Mounting fluid
The Lithoprotect® Mounting fluid DXMF301 for an efficient wet bonding of self-adhesive foils. Lithoprotect® Mounting fluid DXMF301 is a ready-to-use product and optimized for the self-adhesive UV-protection yellow foil YSA520E212. Detailed information is available in our assembly instructions for Lithoprotect® self-adhesive UV-protection yellow foil YSA520E212.
Prices and availability
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Our current prices and the Lithoprotect® product range with exact measurements can be found iCr price list:
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Phone: +49 (0)731 977 343 0
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Lithography Application Notes
Our list of application notes with litho-related theoretical and technical background on all stages of micro-structuring can be downloaded from here:
> application notes