Shperulites Formation of Low Density Polyethylene Thin Film and Characteristics of Dielectric Breakdown

저밀도 폴리에틸렌 박막의 결정 형성과 절연파괴 특성

To make clearly breakdown rl1cchanism and path at interface of crystal and amorphous region, we fabricated HDPE and LDPE thin film by dropping solution onto glass substrate. then annealed the film at $140^{\circ}C$. Shperulites formation and its interface prepared from of two different materials differ from each other. Comparing breakdown site and breakdown field of HDPE with those of LDPE, we can demonstrate the reason that breakdown holes in HDPE are concentrated on the region of interface. From the result, It is appeared that interface of crystallites lead not to weakness as electrical insulating materials.