https://www.reuters.com/article/us-southkorea-japan-laborers-material/samsung-sk-hynix-ask-korean-firm-to-boost-chemicals-supply-amid-japanese-curbs-idUSKCN1UB0YG >South Korea's Samsung Electronics and SK Hynix have asked a local supplier to the boost supply of a key chipmaking chemical to guard against any production disruptions, an official at the supplier said on Tuesday.