How to say "substrate" in Japanese

• 基板きばんCommon
  nounThe word for the electronics sense: a circuit board, or the board serving as a substrate for electronic components. A common word, and the default choice in hardware contexts.
• 基質きしつ
  nounThe biochemistry term: the substance that an enzyme acts on and is changed by. Use it for that scientific sense; it is not the word for circuit boards or base materials.
• 基材きざい
  nounA base material: the underlying material of a product or layered structure, the backing to which other layers are applied. A less common technical word for materials contexts, not for enzymes or circuit boards.
• 支持層しじそう
  nounChiefly a base of support, such as a political party's electoral base; as a technical term it means a physical supporting or load-bearing layer. Only rarely the word you want for 'substrate'.
• 基体きたい
  nounA technical word for the base body: the substrate understood as a solid body on which other parts or layers are formed. A less common choice.

Choose 基板 for circuit boards and electronics, 基質 for the biochemistry sense, 基材 for a base material in layered structures, 基体 for a technical base body, and 支持層 only for a literal supporting layer.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 基板きばん(circuit) board
• 基質きしつsubstrate (i.e. in biochemistry)
• 基材きざいsubstrate
• 支持層しじそうbase support (e.g. for a party in an election)
• 基体きたいbase
• 基層語きそうごsubstratum