略語大辞典 [Opt] 29 PI polyimide ポリイミド. プラスチック樹脂. 半導体集積回路(IC)のパッケージ材として用いる.polyimide; a transparent inert polymer chemical; a synthetic resin; has excellent thermal stability, a low dielectric constant, and good mechanical properties; e.g. PMDA(pyromellitic dianhydride)-ODA(oxydianil 丸善「略語大辞典」JLogosID : 11855742