Taiwan becomes worldʼs largest importer of Russian naphtha, sending 1.7 bn in tax revenue to Putinʼs war chest

They say naphtha is

an essential feedstock for the petrochemicals used in Taiwanʼs semiconductor and electronic component manufacturing

but where in the manufacturing process is it used?
A DDG search turned up a naphtha cracking plant in Taiwan that was converted in the construction of a new plant, and a bunch of hits for renewable naphtha methods, but no mention of how it's used or why it's needed.

"the Mailiao refinery owned by Formosa Petrochemical Corporation (FPCC) — a privately owned company — increased its reliance on Russian naphtha from 9% before the full-scale invasion to 90% in the first half of 2025, and has been responsible for importing 96% of Taiwan’s total imports. "