摘要:
The present invention provides a composite magnetic body containing metallic magnetic powder and thermosetting resin and having a packing ratio of the metallic magnetic powder of 65 vol % to 90 vol % and an electrical resistivity of at least 104 &OHgr;·cm. When a coil is embedded in this composite magnetic body, a miniature magnetic element can be obtained that has a high inductance value and is excellent in DC bias characteristics.
摘要:
A dielectric ceramic is made of a sintered body of a complex oxide including at least one element selected from the group consisting of Zr, Ti and Mn, at least one element selected from the group consisting of Mg, Zn and Co, and at least one element selected from the group consisting of Nb and Ta, wherein, the complex oxide is represented by a formula xZrO2-yTiO2-zA(1+w)/3B(2−w)/3O2 where ‘A’ in the formula denotes at least one element selected from the group (A) consisting of Mg, Zn and Co, ‘B’ denotes at one element selected from the group (B) consisting of Nb and Ta; x, y, z and w denote values in the respective ranges of 0.20≦x≦0.55, 0.40≦y≦0.55, 0.05≦z≦0.25, and 0≦w≦0.30, and x, y and z have a relationship represented as x+y+z=1; MnO is present in a range of 0.1 mol % to 1.0 mol % to the complex oxide; and an average grain size of the dielectric ceramic is from 10 &mgr;m to 70 &mgr;m, thereby providing a dielectric ceramic that has a high dielectric constant (&egr;r) and an unloaded (Qu) value even in a comparatively low frequency region as a microwave region i.e., in a range of 0.4 GHz to 2.4 GHz and that realizes a desired temperature coefficient (&tgr;f) of a resonant frequency with a high mechanical strength, and thus a dielectric device using the dielectric ceramic is provided.
摘要翻译:电介质陶瓷由包含选自Zr,Ti和Mn中的至少一种元素的复合氧化物的烧结体,选自Mg,Zn和Co中的至少一种元素和至少一种 元素选自Nb和Ta,其中复合氧化物由式xZrO2-yTiO2-zA(1 + w)/ 3B(2-w)/ 3O2表示,其中式中的“A”至少表示 选自由Mg,Zn和Co组成的组(A)中的一种元素,'B'表示选自Nb和Ta组成的组(B)中的一种元素; x,y,z和w分别表示0.20 <= x <= 0.55,0.40 <= y <= 0.55,0.05 <= z <= 0.25,0 <= w <0.30的各个范围内的值,x, y和z具有表示为x + y + z = 1的关系; MnO以0.1mol%至1.0mol%的范围存在于复合氧化物中; 并且电介质陶瓷的平均晶粒尺寸为10μm至70μm,从而提供即使在作为微波区域的较低频率区域中也具有高介电常数(ε)和无载(Qu)值的电介质陶瓷,即 ,在0.4GHz至2.4GHz的范围内,并且实现具有高机械强度的谐振频率的期望温度系数(tauf),因此提供了使用电介质陶瓷的电介质器件。
摘要:
The present invention provides a composite magnetic body containing metallic magnetic powder and thermosetting resin and having a packing ratio of the metallic magnetic powder of 65 vol % to 90 vol % and an electrical resistivity of at least 104 &OHgr;·cm. When a coil is embedded in this composite magnetic body, a miniature magnetic element can be obtained that has a high inductance value and is excellent in DC bias characteristics.
摘要:
An image forming apparatus includes a movable image bearing member, a charger means including a charge member for electrically charging the image bearing member with electroconductive particles between the charge member and the image bearing member and a developing member for developing a latent image with toner mixed with electroconductive particles. The latent image is formed on the image bearing member having been charged by the charging means, and a toner image provided by development of the latent image by the developing member is transferred onto a recording material. The electroconductive particles mixed in the toner is carried by the image bearing member and are fed to between the charge member and the image bearing member. The width A, measured in a direction perpendicular to a moving direction of the image bearing member, in which the electroconductive particle are present between the charge member and the image bearing member, a width B in which the developing means is capable of effecting development, and a recording width C of a maximum size recording material, satisfy: A>B≧C.
摘要:
A green sheet including a binder containing an acrylic resin having no polar group and a ceramics material in powder is prepared, and connection via are formed in the green sheet. Further, a conductor layer having virtually no voids is placed on the green sheet and a mask is also placed on the conductor layer. Then, the conductor layer is patterned by wet-etching so that wiring is formed thereon. A plurality of the green sheets thus formed are laminated, and a binding sheet, which contains an inorganic composition that has virtually no sintering shrinkage at the firing temperature of the multi-layered body as a main component, is formed on either both surfaces or one surface of the laminated body, and this is then fired, and thereafter, the binding sheet is removed.
摘要:
An image forming apparatus includes an image bearing member, a developer carrying member for carrying thereon a developer to transport the developer to a developing zone, and a regulation member provided in touch with the surface of the developer carrying member to regulate coat weight of the developer carried thereon. The image bearing member includes a conductive substrate and a photosensitive layer formed thereon, and the photosensitive layer contains at least one polycarbonate resin (I) having a viscosity-average molecular weight not more than 1.5×104 and at least one polycarbonate resin (II) having a viscosity-average molecular weight more than 1.5×104, the polycarbonate resin (I) being contained in a proportion of from 30% by weight to 95% by weight based on the total weight of the polycarbonate resins (I) and (II). On the developer carrying member, the developer is in a coat weight not more than 1.5 mg/cm2 at the developing zone after its regulation by the regulation member. This apparatus can prevent smeared images and enables stable and high-grade image formation.
摘要:
A cartridge detachably attachable on an image forming apparatus a photosensitive member as an image bearing member and a cleaning blade member polycarbonate resin having a viscosity average molecular weight of 1.5.times.10.sup.4 or less is blended with the surface layer of the image bearing member, and the peak value of tan .delta. of the dynamic viscoelastic characteristic of the cleaning blade member appears at 12.degree. C. or less.
摘要:
A method for fabricating a nonvolatile semiconductor memory device according to the present invention includes the steps of: forming a first mask to define a channel of a memory cell in a semiconductor substrate; doping an impurity into the semiconductor substrate by using the first mask, thereby forming a first doped region in the semiconductor substrate; forming a second mask so as to overlap at least one of a first region of the semiconductor substrate where a source is to be formed and a second region of the semiconductor substrate where a drain is to be formed and at least part of the first mask; etching the semiconductor substrate by using the first and second masks, thereby forming a recessed portion in a region of the semiconductor substrate that is not covered with the first and second masks; forming a second doped region in the recessed portion of the semiconductor substrate; and removing the first and second masks, and forming a gate structure including a first insulating film, a floating gate electrode, a second insulating film and a control gate electrode at least over a side surface of the recessed portion and the channel defined by the first mask.
摘要:
A developing apparatus includes magnetic members, which are provided at ends of a developing agent bearing member with gaps therebetween and adapted to form magnetic seals between the magnetic members and the developing agent bearing member, are charged so that leakage between the magnetic seals and magnetic members, such as the developing agent bearing member, disposed in the vicinity of the magnetic seals is prevented.
摘要:
An electro-magnetically shielded metallic enclosure is provided with a novel hinge structure. The enclosure has a plurality of side panels and at least one access door hinged to one of the side panels by a plurality of shielded hinges. Each such hinge has three principal elements: a metallic tab, an elongated slot for receiving and supporting the metallic tab, and a raised metal arch bridging the central portion of the elongated slot. The metallic tab is integrally formed on one edge of the access door and is designed to slide into an elongated slot located in an adjacent side panel to provide support for pivoting the metallic tab and the connected door in a hinged relationship. To prevent EMR from otherwise leaking through the elongated slot, a raised metal arch is provided on the interior of the enclosure bridging the central portion of the slot. The arch is spaced apart from the inner surface of the side panel to permit the free end of the metallic tab to freely rotate when the access door is swung open and closed.