Phison - Wikipedia
Phison Electronics Corporation is a Taiwanese public electronics company that primarily designs, manufactures and sells controllers for NAND flash memory chips. These are integrated into flash-based products such as USB flash drives, memory cards, and solid-state drives (SSDs). Some Sony MicroVault USB sticks and Verbatim Store 'n' Go USB sticks use Phison USB-to-Flash micro-controller ICs.
https://en.wikipedia.org/wiki/Phison