Highly Selective Etch Chemicals for use in the manufacture of semiconductors; Etch chemicals for use in the manufacture of semiconductors; Chemicals for use in industry, namely, silicon and silane compounds for use in the manufacture of semiconductors; hydrofluoric acids; Industrial chemicals, except for medical or veterinary use; Chemicals for use in industry, namely, silicon and silane compound; Phosphoric acid; Phosphoric acid compound; Industrial chemicals, namely, nitride film remover; S...