Surviving in the current market for memory chips is not so simple. Once upon a time there were 35 players, now there are only three. Secondly, each new applicant should have protected by licensing agreements and patents technologies and developments. The Chinese in this sense would not be prevented not only ready to share with them the intellectual property of the partner, but also a seasoned player in the memory market who would help to avoid mistakes. If Micron wanted to become such a "conductor of the Chinese" in the memory market, it would inevitably attract the attention of the US authorities jealously guarding technology from exports to politically unreliable regions.
Finally, the industry develops at a high pace, which is not easy to adhere to even giants with a lot of experience. In the next two or three years, two or three new generations of NAND-type memory will be on the market, and two new stages of lithographic technology will be developed in the field of DRAM memory production. Even with licenses for the release of memory, it will be very difficult to stay in the market for new players.
In addition, Micron itself is skeptical about transferring its intellectual property to joint venture partners, if any. Cooperation with Intel is a slightly different story. Companies simply finance the release of memory, and share common production capacity.