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. "