摘要:
A method of manufacturing a graphene device may include forming a device portion including a graphene layer (GP1) on the first substrate (SUB1); attaching a second substrate (SUB2) on the device portion of the first substrate; and removing the first substrate. The removing of the first substrate may include etching a sacrificial layer between the first substrate and the graphene layer. After removing the first substrate, a third substrate may be attached on the device portion. After attaching the third substrate, the second substrate may be removed.
摘要:
A resonator (100) includes a substrate (110), and a resonating unit (135) formed on the substrate, and having a lower electrode (140), a piezoelectric film (150), and an upper electrode (160). The lower electrode is formed of at least two layers (141,142) to adjust a piezoelectric coupling coefficient. The lower electrode includes a first electrode layer and a second electrode layer, which have crystallographic characteristics, particularly, grain sizes or surface roughnesses Ra, different from each other, respectively. The first and the second electrode layers are formed to have a predetermined thickness ratio to each other.