摘要:
A technique capable of maintaining the filter characteristics of a transmitting filter and a receiving filter by reducing the influences of heat from the power amplifier given to the transmitting filter and the receiving filter as small as possible in the case where the transmitting filter and the receiving filter are formed on the same semiconductor substrate together with the power amplifier in a mobile communication equipment typified by a mobile phone is provided. A high heat conductivity film HCF is provided on a passivation film PAS over the entire area of a semiconductor substrate 1S including an area AR1 on which an LDMOSFET is formed and an area AR2 on which a thin-film piezoelectric bulk wave resonator BAW is formed. The heat mainly generated in the LDMOSFET is efficiently dissipated in all directions by the high heat conductivity film HCF formed on the surface of the semiconductor substrate 1S.
摘要:
A first shutter covers a first supply port formed in an outer peripheral surface of a main body, and can move in an outer peripheral direction along the outer peripheral surface of the main body. A pair of guiding members respectively formed on both ends of the first shutter guide the first shutter in the outer peripheral direction. A lock mechanism fixes the first shutter to achieve a closed sate of the first supply port. The lock mechanism includes a protrusion provided to the first shutter, the protrusion being capable of engaging with a recess formed in the outer peripheral surface. Fixing by the lock mechanism is released when the protrusion elastically deforms and is disengaged from the recess. The protrusion, the recess, and the first supply port are disposed along a virtual curve between the pair of guiding members.
摘要:
An energy storage circuit includes a first capacitor connected with a power generating element via a first diode and a second capacitor connected with the power generating element via a second diode and a switch. The conduction state of the switch is controlled using the potential difference between its second and third electrodes (driving voltage V). The driving voltage when the switch enters its conductive state is higher than the driving voltage when the switch enters its non-conductive state.
摘要:
A resin film containing a cellulose acylate and at least one of a polymer or an oligomer having a cyano group-comprising recurring unit in an amount of from 1.5 to 300% by mass of the cellulose acylate has a small photoelastic coefficient and a small moisture content and is excellent in transparency.
摘要:
A cellulose acylate film, having: a cellulose acylate mixture; and a plasticizer, wherein the cellulose acylate mixture contains: a cellulose acetate having a degree of substitution with acetyl group of 2.7 to 2.95; a cellulose acylate having a total degree of substitution with acyl group of 2.0 to 2.9 and a degree of substation with acyl group having 3 to 6 carbon atoms of 0.05 to 0.40, a mixing ratio of the cellulose acetate to the cellulose acylate is 90/10 to 40/60 by mass, the cellulose acylate mixture has a total degree of substitution with acyl group of 2.6 to 2.95, a degree of substitution with acetyl group of 2.2 to 2.9, and a degree of substitution with acyl group having 3 to 6 carbon atoms of 0.05 to 0.40, and an amount of the plasicizer is 30% to 60% by mass based on the cellulose acylate mixture.
摘要:
A thin film piezoelectric bulk acoustic wave resonator has a multilayer structure including a piezoelectric thin film, a first metal electrode film, and a second metal electrode film. At least a part of the piezoelectric thin film is interposed between the first and second metal electrodes. A resonance part and a connection part are formed on an insulating substrate as films by a thin film forming apparatus. The resonance part vibrates in radial extension mode with a center of the piezoelectric thin film used as a node, the piezoelectric thin film of two resonance parts is polarized in a direction perpendicular to a film surface, and a width of the connection part is one-fourth or less of a width of two resonance parts.
摘要:
A hollow cylindrical cap is rotatably attached to a container body opening provided in one end of a hollow cylindrical container body. A seal member around the container body opening forms a seal between the container body and the cap. Once the cap is attached to the container body, pressing chips are circumferentially slidably engaged with a flange, and the seal member is pressure-sealed to a pressure-seal portion. A toner container identification is contiguous with the rear edge of one of the pressing chips. The toner container identification is formed by denting one part of the cap so its outer surface radially protrudes outward, and has a predetermined cross-section.
摘要:
The film bulk acoustic wave resonator includes a laminate structure composed of a piezoelectric layer, and first and second electrode layers interposing at least part of the piezoelectric layer, in which the first metal electrode is dispersively formed on an electrode plane facing the second metal electrode, and a gap is formed in a substrate correspondingly to the laminate-structured resonance part. Except for an area of a wire electrode electrically connected to the first electrode layer and an area of a wire electrode electrically connected to the second electrode layer, the piezoelectric layer, first electrode layer and second electrode layer do not come in contact with the insulating substrate but are supported on a hollow. Also, a prop is formed in the gap to support the laminate structure.
摘要:
An object of the present invention is to provide an inexpensive thin film piezoelectric bulk acoustic wave resonator that allows fine-tuning of a resonant frequency. Another object is to provide an inexpensive filter with dramatically improved frequency characteristics, using thin film piezoelectric bulk acoustic wave resonators that can be formed on one substrate. A thin film piezoelectric bulk acoustic wave resonator of the present invention has a laminated structure including a piezoelectric thin film, and a first metal electrode film and a second metal electrode film between which part of the piezoelectric thin film is sandwiched; the first metal electrode film has a plurality of holes formed on an electrode plane opposite to the second metal electrode film and having a depth equivalent to at least the thickness of the first metal electrode film; and if a combined thickness of top and bottom electrode layers and the piezoelectric thin film is ht, the covering ratio σ of the electrode plane of the first metal electrode film satisfies a condition 0
摘要:
A bulk acoustic wave resonator which has excellent elasticity and high electromechanical energy conversion efficiency. A bulk acoustic wave resonator comprises a substrate, a lower electrode formed on the substrate, an interlayer formed on the lower electrode layer, a piezoelectric layer formed on the interlayer, and an upper electrode layer formed on the piezoelectric layer. Moreover, both the first lattice mismatch, which is determined between a short edge of the lattice constituting a closest packed plane of a material consisting of an interlayer and a short edge of the lattice constituting a closest packed plane of a material consisting of a piezoelectric layer, and the second lattice mismatch, which is determined between a long edge of the lattice constituting a closest packed plane of a material consisting of an interlayer and a long edge of the lattice constituting a closest packed plane of a material consisting of the piezoelectric layer, are 7% or less, and a lower electrode layer is a material in which the value of the elastic stiffness C33 is 200 GN/m2 or more.
摘要翻译:具有优异弹性和高机电能量转换效率的体声波谐振器。 体声波谐振器包括基板,形成在基板上的下电极,形成在下电极层上的中间层,形成在中间层上的压电层,以及形成在压电层上的上电极层。 此外,在构成由中间层构成的材料的最接近的填充平面的晶格的短边缘和构成由压电层构成的材料的最接近的填充平面的晶格的短边缘之间确定的第一晶格失配 以及在构成由中间层构成的材料的最接近的填充平面的格子的长边和构成由压电体构成的材料的最接近的填充面的格子的长边缘之间确定的第二晶格失配, 为7%以下,下部电极层为弹性刚度C333的值为200Ng / m 2以上的材料。