Recently, because ZTE was banned by the U.S. government to ban the use of U.S. electronic chips, the popularity of semiconductor technology across the country has also made many people understand that domestic manufacturers have fallen so far behind in the semiconductor industry. Not only downstream chip R&D, design cannot, and upstream semiconductors. Equipment, materials are heavily dependent on imports.
Fortunately, this situation is changing, the lithography technology needed for chip production is now localized, and domestic companies have taken over another key technology of Chinese core.
We heard many terms such as photolithography, etching, and nm process, and they are still unfamiliar with photoresist.
The purchased silicon wafer can be put into the production line after being inspected without damage. There may be various film forming processes in the early stages, and then it will enter the process of coating photoresist. The lithography process is a kind of graphic photocopying technology. A key process in the manufacturing process of integrated circuits.
First, a photoresist (photosensitive resin) is dropped on a silicon wafer, uniformly applied to a photoresist film by high-speed rotation, and a photoresist film is applied at a suitable temperature to cure the photoresist film.
After the photoresist is applied, it can enter the lithography machine for exposure, so that the ultraviolet ray can generate the circuit diagram in the mask on the photoresist. If necessary, multiple exposures are also needed, and the photoresist is repeatedly used. Therefore, no circuit of this step can be created. from.
Photoresist is a material that is sensitive to light, temperature, and humidity. It can change chemical properties after light exposure. This is the basis of the entire process.
There are different types of photoresists, PMMA (polymethyl methacrylate), polymethyl glutarimide (PMGI), and DNQ (phenolic resin) and other materials can be used as photoresist. According to relevant information, In 2022, the market value of the global photoresist market will reach 41.5 billion U.S. dollars, a compound annual growth rate of 5.5% - this market is even larger than the output value of the lithography machine. After all, photoresist is a consumable material.
Currently many participants in the photoresist market come from the United States, Japan, South Korea and other countries, including Dow Chemical, DuPont, Fujifilm, Shin-Etsu Chemical, Sumitomo Chemical, LG Chemicals, etc. Chinese companies are also in the photoresist field. Lack of core technology.
Today's Science and Technology Daily reported that the domestic photoresist developed by Shengquan Co., Ltd., which was developed in 26 years, was successfully made domestically. It broke the monopoly of companies such as the United States, Japan, and South Korea.
Shengquan is now the largest phenolic resin company in Asia. The technology is derived from the cooperation between Shengquan and British Hayworth Minerals and Chemicals Co., Ltd. in 1997. It introduced the most advanced phenolic resin production technology in the UK, and it has since introduced A series of research and development backbone led by Li Ningning, senior engineer of former Tianjin Resin Factory.
In 2007, in cooperation with the Chemistry Institute of the Chinese Academy of Sciences, a 'Phenolic Resin Technology Research Center' was established to introduce and develop a number of aerospace and military projects, including rocket-resisting ablative materials; then, a doctoral workstation was established, and a number of institutions were established. The cooperation of production, study and research was carried out. In 2011, Japan introduced advanced epoxy resin production technology and built the largest electronic grade special epoxy resin workshop in China.
It is only this report that, besides clarifying that the domestic photoresist is a phenolic resin type, the specific performance is still unknown. However, after achieving a breakthrough from scratch, there will be development costs in the future. Many domestic companies do so. As a result, technology breaks through and there is an opportunity to participate in competition. Otherwise, the qualifications associated with Taiwan’s competition are not. Then talk about chasing and even surpassing it.
