The Chinese company Hefei Aotron Semiconductor Co., Ltd. announced that its silicon wafer recycling facility in the eastern province of Hanui has achieved mass production. This is the first such facility to operate in China, enabling local semiconductor manufacturers to recycle damaged or contaminated 12-inch wafers within China.According to reports Science and Technology Post.
Like any manufacturing process, semiconductor manufacturing does deviate from the established “perfect” production scenario.Even in semiconductor manufacturing facilities, some of the most strictly controlled environments in the world, there is still room for failure—whether in the wafer etching process that extracts chips from the main silicon material, or the use of contaminated materials in various manufacturing steps. Main material. Mistakes are costly here, although some defects can lead to lower yields (percentage of qualified silicon available at the end of manufacturing), but other errors-for example Pollution or power failure -It can allow the company to return thousands of dollars and eliminate months of careful manufacturing steps for a single silicon wafer.
Wafer regeneration is an all-encompassing term that refers to the process of returning contaminated and/or impurity-laden wafers to their original state-ready to go around again in the manufacturing room. The process can be presented in different ways: one of the processes can be completed in a three-step process, in which a diamond grinding disc is used to grind away the etching layer and eliminate the structure on the wafer; the second chemical polishing of the wafer surface back to the original state; the last chemical Clean the entire wafer surface. The regenerated wafers are then packaged and sent back to the customer, who can then reinsert them into their manufacturing pipeline.
The wafer recycling facility of Hefei Altron Semiconductor Co., Ltd. has now joined a limited number of such facilities in the world, and will provide a domestic partner for Chinese semiconductor manufacturers. Previously, unusable wafers had to be sent to Japan to accept the same deal with.
The plant started construction in March 2020, with a total investment of approximately US$154 million. Hefei Altron Semiconductor expects that the facility can regenerate 1.68 million wafers per year and install additional capacity to clean other manufactured components at a rate of 1.2 million wafers per year.