摘要:
A coil component includes a body having one surface and the other surface and a plurality of wall surfaces, first and second insulating substrates spaced apart from each other, first and second recesses disposed in both end surfaces of the body and extending to one surface of the body, first and second coil portions disposed on the first and second insulating substrates, one ends and the other ends of the first and second coil portions being exposed to the first and second recesses, first and second external electrodes disposed along an inner surface of the first recess and one surface of the body and connected to one ends of the first and second coil portions, and third and fourth external electrodes disposed along an inner surface of the second recess and one surface of the body and connected to the other ends of the first and second coil portions.
摘要:
A coil electronic component includes a body having one surface and the other surface, opposing each other, and a plurality of wall surfaces respectively connecting the one surface and the other surface of the body, first and second recesses, respectively formed in both end surfaces of the body opposing each other among the plurality of wall surfaces of the body, extending to the one surface of the body, a wound coil, embedded in the body, including first and second lead-out portions, a first external electrode disposed along an internal wall of the first recess and the one surface of the body and connected to the first lead-out portion, and a second external electrode disposed along an internal wall of the second recess and the one surface of the body and connected to the first lead-out portion. The first and second external electrodes are spaced apart from each other.
摘要:
A bulk acoustic wave resonator includes a substrate, a first electrode and a second electrode formed on the substrate, and a piezoelectric layer provided between the first electrode and the second electrode. Either one or both of the first electrode and the second electrode include a molybdenum-tungsten alloy having a weight ratio of molybdenum to tungsten in a range of 3:1 to 1:3.
摘要:
Embodiments of the invention provide a PZT-based piezoelectric ceramic material represented by the following formula: Pbx(ZryTiz)M1-y-zO3, which is an ABO3 perovskite crystal material including a crystal lattice A-site and a crystal lattice B-site, x, y, and z satisfying the following Equations, respectively: 0.830≦x≦0.964, 0.43≦y≦0.55, and 0.43≦z≦0.55, and M being a metal element having a valence of +5 or +6, and a piezoelectric device using the same. According to at least one embodiment, since Pb is not excessively added, a Pb or PbO phase deteriorating piezoelectric properties is not formed in a PZT-based piezoelectric material, such that excellent electric, dielectric, and piezoelectric properties are exhibited.
摘要:
Embodiments of the invention provide a piezoelectric actuator module, which includes a multilayer part comprising a multilayer piezoelectric material part and an electrode part connected to the multilayer piezoelectric material part, and a support layer coupled with the multilayer part. The piezoelectric actuator module further includes a support part displaceably supporting the support layer. The multilayer piezoelectric material part is poled in the same direction, and the multilayer part is configured to expand or contract when voltages in anti-phase are applied to the electrode part.