ALDalso: エーエルディーMeanings1nounatomic layer deposition; ALDTechnical term in semiconductor manufacturing and materials science. Refers to a thin-film deposition technique. Cross-referenced with 原子層エピタキシー (atomic layer epitaxy).See also: 原子層エピタキシーALDは半はん導どう体たい製せい造ぞうにおいて重じゅう要ような技ぎ術じゅつです。ALD is an important technique in semiconductor manufacturing.