Stella Chemifa
An Osaka-based fluorine chemicals company that supplies ultra-high-purity hydrofluoric acid, ammonium fluoride and mixed-acid etchants used to clean and etch silicon wafers.
ステラケミファ・Process chemicals, gases and targets・Last updated: October 27, 2026
Overview
Stella Chemifa is headquartered in Osaka and specializes in fluorine chemistry. Its semiconductor products are ultra-high-purity hydrofluoric acid (HF), ammonium fluoride and mixed-acid etching solutions.
It also makes lithium hexafluorophosphate (LiPF6), an electrolyte salt for lithium-ion batteries.
Business: High-purity hydrofluoric acid and fluorine chemicals
Why it matters
- Dilute HF removes native oxide from silicon and is used in many cleaning steps, so its metal impurity levels matter in every fab.
- High-purity hydrogen fluoride was one of the three materials covered by Japan's 2019 export control tightening toward Korea.
Main products
- •Ultra-high-purity hydrofluoric acid (HF)
- •Ammonium fluoride and buffered HF
- •Mixed-acid etchants
- •LiPF6 battery electrolyte
Sites in Japan
Head officeHeadquarters
Osaka