Negative photoresist can be used in display devices, semiconductors and other fields. my country’s industry development faces challenges

There are many types of photoresists. According to different chemical reaction mechanisms and development principles, they can be divided into two categories: positive photoresists and negative photoresists. Negative photoresist, also known as photoresist and negative photoresist, refers to the photoresist that forms insoluble substances after exposure during the photolithography process. Negative photoresist has the advantages of high contrast, high precision, easy use, fast photosensitivity, good adhesion, and good barrier effect. It is widely used in display devices, semiconductors and other fields.

The upstream of the negative photoresist industry chain supplies raw materials, including solvents, sensitizers, and photosensitive resins. Polyisoprene is the photosensitive resin commonly used in the production process of negative photoresists. Polyisoprene has two isomers, S-cis and S-trans. Its main characteristics are acid and alkali corrosion resistance, high friction coefficient, high elasticity and high elongation. In recent years, due to factors such as insufficient downstream application development, the operating rate of my country’s polyisoprene units has been low, resulting in a high reliance on imports for demand. Insufficient supply of raw materials has brought certain challenges to the development of the negative photoresist industry.

The midstream of the negative photoresist industry chain is product manufacturing, including polyhydrocarbon-bis-azide photoresists and polycinnamate photoresists. Polyhydrocarbon-bisazide photoresist is also called cyclized rubber photoresist. This product is difficult to produce. The United States and Japan are the first countries in the world to master its production technology; polycinnamate photoresist can It is subdivided into polyethylene oxyethyl cinnamate photoresist (OSR photoresist) and polyvinyl alcohol cinnamate photoresist (KPR photoresist). Its appearance is a light yellow transparent liquid with strong corrosion resistance and high resolution. High, good photosensitivity and other advantages.

According to the “2023-2028 China Negative Photoresist Industry Market In-depth Research and Development Prospects Forecast Report released by the Industrial Research Center Display, the downstream of the negative photoresist industry chain is application fields, including display devices, semiconductors, etc. In the field of display devices, negative photoresist can be used to produce OLED displays, touch screen ITO, etc.; in the field of semiconductors, negative photoresist can be used to produce MEMS chips, microfluidic chips, etc. Driven by downstream demand, the prosperity of the negative photoresist industry will further increase.

The global negative photoresist market is mainly concentrated in Europe, the United States, Japan and other countries. Tokyo Yinghua of Japan and Microchem of the United States are world-renowned negative photoresist manufacturers. The main players in my country’s negative photoresist market include Tongcheng New Materials, Jingrui Electric Materials, Aisen Technology, Feikai Materials and Rongda Photosensitive.

Industry analysts said that as a segmented product of photoresist, negative photoresist has broad applications in the fields of display devices and semiconductors. prospect. However, currently, due to factors such as high technical barriers and insufficient supply of raw materials, my country’s domestic negative photoresist market share is low. In the future, with the support of national policies and the continued efforts of local enterprises, the development speed of my country’s negative photoresist industry will further accelerate.