AZ 1518 Photoresist - 3.785 l








Product information "AZ 1518 Photoresist - 3.785 l"
AZ® 1518
Positive Thin Resist for Wet Etching
General Information
AZ® 1518 belongs to the AZ® 1500 photoresist series of positive thin resists (g-, h- and i-line sensitive) with optimized adhesion to all common substrate materials, the main application of which is as a resist mask for wet etching.
Product Properties
AZ® 1500 resist family is not optimized for very steep resist sidewalls nor for high stability against thermal softening (softening temperature approx. 100 °C), but for improved adhesion to all common substrate materials. The high photoinitiator concentration of the AZ® 1500 series compared to thick resists allows for very fast development. AZ® 1518 achieves a resist film thickness of approx. 1.8 µm at 4000 rpm and is often used for etching metallic or non-metallic layers. It is not advisable to dilute the AZ® 1518 below the level of the AZ® 1505, as diluted, photoinitiator-rich resists tend to quickly form particles. If the resist does have to be diluted, the corresponding amounts should be used up quickly and attention should be paid to possible particle formation. AZ® 1518 should not be processed with a resist film thickness significantly thicker than approx. 2 µm, as the high photoinitiator concentration can lead to the formation of nitrogen bubbles in the resist film when exposed to light as the resist thickness increases. If thicker resist films are required, the AZ® 4533, which has a significantly lower photoinitiator content, is recommended.
Developers
For development, we recommend either TMAH-based developers such as the ready-to-use AZ® 326 MIF or AZ® 726 MIF, the NaOH-based AZ® 351B (typically 1: 4 diluted with water), and if the selectivity requirements are not too high, the KOH-based AZ® 400K K (also typically 1:4 diluted with water). On alkaline-sensitive substrate materials such as aluminum, we recommend the aluminum-compatible AZ® Developer in a 2: 1 to 1:1 dilution (developer:water).
Removers
If the resist structures have not been thermally cross-linked by plasma processes, ion implantation or high temperatures (> approx. 140 °C), all common removers such as AZ® 100 Remover, DMSO or many other organic solvents (e.g. acetone rinsed with isopropanol) are suitable for removing the resist layer. For cross-linked resist structures, high-performance strippers such as the NMP-free TechniStrip P1316 or AZ® 920 Remover are recommended, and in the case of alkaline-sensitive substrate materials (such as aluminum), the TechniStrip MLO 07.
Thinning/ Edge Bead Removal
Even if, as described above, a stronger dilution of AZ® 1518 is not recommended due to the accelerated particle formation, PGMEA = AZ® EBR Solvent.is the recommended solvent. PGMEA is the solvent for AZ® 1518 anyway and is also recommended for edge wall removal if necessary.
Further Information
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MSDS:
Safety Data Sheet AZ® 1518 Photoresist english
Safety Data Sheet AZ® 1518 Photoresist german
TDS:
Technical Data Sheet AZ® 1518 Photoresist english
Application Notes:
Further Information about Photoresist Processing)
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Remover