摘要:
A blade for used in corneal surgery for incising and separating a corneal epithelium into a flap shape, the blade includes: an edge tip portion including a distal end and two upper and lower edge tip surfaces. An angle formed between the two edge tip surfaces is not smaller than 60° and smaller than 140°, and a height of the edge tip portion is not smaller than 3 μm.
摘要:
A thin film bulk acoustic wave (BAW) resonator structure and filter which can be fabricated by inexpensive manufacturing techniques and in smaller size than conventional such products are to be provided. The BAW resonator structure and filter have a substrate, a first BAW resonator placed over the substrate, an acoustic reflection layer placed over the first BAW resonator and a second BAW resonator placed over the acoustic reflection layer, and the acoustic reflection layer is electroconductive. Herein, the acoustic reflection layer constitutes a first electrode, and this first electrode electrically connects and acoustically separates the first BAW resonator and the second BAW resonator.
摘要:
A thin film bulk acoustic wave (BAW) resonator structure and filter which can be fabricated by inexpensive manufacturing techniques and in smaller size than conventional such products are to be provided. The BAW resonator structure and filter have a substrate, a first BAW resonator placed over the substrate, an acoustic reflection layer placed over the first BAW resonator and a second BAW resonator placed over the acoustic reflection layer, and the acoustic reflection layer is electroconductive. Herein, the acoustic reflection layer constitutes a first electrode, and this first electrode electrically connects and acoustically separates the first BAW resonator and the second BAW resonator.
摘要:
The present invention provides a film bulk acoustic wave resonator (FBAR) filter that can keep the Q factor high. The FBAR filter comprises a first FBAR with a first resonant frequency and a second FBAR with a second resonant frequency, formed on a same substrate. The FBAR filter has such a structure that a first underlayer is formed between the substrate and a first bottom electrode layer and a second underlayer is formed between the substrate and a second bottom electrode layer, the first underlayer thickness being different from the second underlayer thickness.
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 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。