Thick film photoresist composition containing carboxyl phenolic resin with high heat resistance

Abstract

The invention discloses a thick film photoresist composition containing carboxyl phenolic resin with high heat resistance. The structural general formula of the carboxyl phenolic resin with high heatresistance is shown in the specification, wherein x is 0-4, the ratio of m to n is 0.05-0.75: 1, R is H, phenyl or C1-C9 alkyl, and the weight-average molecular weight of the resin is 8000-35000g / mol.The film-forming resin is mixed with commercial phenolic resin, a photosensitive compound, an additive, a solvent and other components to obtain the thick film photoresist composition. Tests show that the thick film photoresist composition is high in resolution ratio, high in sensitivity, good in heat resistance and excellent in etching resistance, and is suitable for MEMS processing and packaging processes with high heat resistance requirements.

Description

technical field [0001] The invention relates to the technical field of functional polymer materials, in particular to a thick-film photoresist composition prepared by using high heat-resistant carboxyl phenolic resin as a film-forming resin. Background technique [0002] Micro-electro-mechanical systems (MEMS), also known as micro-electro-mechanical systems, micro-systems, micro-machines, etc., refer to high-tech devices with a size of a few millimeters or even smaller. MEMS is an independent intelligent system whose internal structure is generally on the order of microns or even nanometers. MEMS is developed on the basis of microelectronics technology (semiconductor manufacturing technology), and integrates high-tech electronic machinery produced by technologies such as lithography, corrosion, thin film, LIGA, silicon micromachining, non-silicon micromachining and precision machining. device. The MEMS fabrication method is accomplished by multiple photolithography and rel...

AI Technical Summary

Problems solved by technology

Due to the thicker film thickness, the sensitivity decreases, the exposure time and development time are increased, and the processing efficiency is reduced; various heat treatments will be implemented in the manufacturing process, and insufficient heat resistance will cause the pattern to collapse; when etching high aspect ratio patterns, photolithography is required Resist has high etch resistance, how to balance photosensitivity, heat resistance, etch resistance has become an important development direction of thick film photoresist

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