摘要:
A magnetic disk apparatus includes a magnetic head, a magnetic disk, and a rotary actuator to move the magnetic head onto the magnetic disk. The rotary actuator includes a center shaft fixed to a disk enclosure, a carriage supporting the magnetic head and rotatably mounted to the center shaft, and a coil spring to return the carriage to a CSS zone when there is a breakdown or failure of the power supply of the magnetic disk apparatus. The coil spring is provided in a space formed between the center shaft and the carriage, and thereby can achieve a more compact magnet disk apparatus. Moreover, due to the assembly of the return coil spring around the shaft using a pair of end ring members, contact of the spring with the shaft and carriage is avoided and proper operation of the magnetic heads is ensured.
摘要:
The present invention relates to a method for producing a nucleoside derivative represented by formula (2), comprising the step of reducing a nucleoside of formula (1) in the presence of a noble metal catalyst comprising a carrier and a noble metal supported thereby, selected from the group consisting of (A) a homogeneously supported catalyst where the specific surface area of the noble metal is 95.0 m2/g or more and the particle size of the noble metal is 4.3 nm or less, and (B) a surface-loaded catalyst where the specific surface area of the noble metal is 56.0 m2/g or more and the particle size of the noble metal is 8.0 nm or less, wherein R1 is hydrogen or a protective group, R2 is NH2 or OH, R3 is an acyl group, and X is a chlorine or bromine atom. According to the present invention, the yield can be made equal even when the amount of catalyst is smaller than that used for the conventional products.
摘要:
A silicone adhesive for a semiconductor element that is suitable as a die bonding material for fixing a light emitting diode chip to a substrate. The adhesive includes (a) an addition reaction-curable silicone resin composition having a viscosity at 25° C. of not more than 100 Pa·s, and yielding a cured product upon heating at 150° C. for 3 hours that has a type D hardness prescribed in JIS K6253 of at least 30, (b) a white pigment powder having an average particle size of less than 1 μm, and (c) a white or colorless and transparent powder having an average particle size of at least 1 μm but less than 10 μm. The adhesive exhibits high levels of concealment, effectively reflects light emitted from the LED chip, and also exhibits favorable chip positioning properties, superior adhesive strength, and excellent durability.
摘要翻译:一种用于半导体元件的硅粘合剂,其适合作为用于将发光二极管芯片固定到基板的芯片接合材料。 粘合剂包括(a)在25℃下的粘度不大于100Pa.s的加成反应固化性有机硅树脂组合物,并且在150℃加热3小时时产生固化产物,其具有类型 JIS K6253规定的D硬度为30以上,(b)平均粒径小于1μm的白色颜料粉末,(c)平均粒径为1μm以上的白色或无色透明粉末 但少于10个妈妈。 粘合剂显示出高水平的隐蔽性,有效地反映了从LED芯片发出的光,并且还显示出有利的芯片定位性能,优异的粘合强度和优异的耐久性。
摘要:
The present invention relates to a method for producing a nucleoside derivative represented by formula (2), comprising the step of reducing a nucleoside of formula (1) in the presence of a noble metal catalyst comprising a carrier and a noble metal supported thereby, selected from the group consisting of (A) a homogeneously supported catalyst where the specific surface area of the noble metal is 95.0 m2/g or more and the particle size of the noble metal is 4.3 nm or less, and (B) a surface-loaded catalyst where the specific surface area of the noble metal is 56.0 m2/g or more and the particle size of the noble metal is 8.0 nm or less, wherein R1 is hydrogen or a protective group, R2 is NH2 or OH, R3 is an acyl group, and X is a chlorine or bromine atom. According to the present invention, the yield can be made equal even when the amount of catalyst is smaller than that used for the conventional products.
摘要:
A first yoke member is received on a first reference plane defined on a support body. A second yoke member is coupled to the first yoke member so as to define a space for accommodation of a voice coil between the first and second yoke members. The second yoke member is opposed to a second reference plane, different from the first reference plane, defined on the support body. A screw member is engaged with the second yoke member for movement in the direction intersecting the second reference plane. The second yoke member is received on the second reference plane of the support body based on the movement of the screw member. Even if a gap happens to exist between the second yoke member and the second reference plane due to dimensional errors, the second yoke member is reliably supported on the support body.
摘要:
A line inverse driving method is performed by outputting voltages for gradation display in mutually reverse polarities with respect to pixels adjacent in a data signal line direction. A separation switch is provided between an output stage of a data driver and a data signal line to separate them. In a blanking period, the data signal line is cut off, and in the selection-scanning period of a scanning signal line to be scanned first, the scanning signal line to be scanned next is also subjected to the selection-scanning. With this structure, respective charges in adjacent pixel capacitors are neutralized, and it is therefore possible to reduce a power consumption. Further, since a short-circuit can be performed at short distance, the problem of dull waveform can be suppressed, thereby realizing an image display device suited for a large screen.
摘要:
A display module of the present invention includes a liquid crystal panel driven by a driving signal in a column direction and a driving signal in a row direction; a source driver for supplying the driving signal in the column direction; a gate driver for supplying the driving signal in the row direction; a TCP type film provided with the source driver; a TCP type film provided with the gate driver; and a controller circuit for controlling the gate driver and the source driver, which is installed on the TCP type film together with the source driver or the gate driver. With this structure, the number of parts can be reduced, achieving miniaturization, weight reduction, and cost reduction.
摘要:
A rotary type actuator for a magnetic disk device includes a magnetic head that traverses tracks of the magnetic disk as the actuator rotates about a rotary shaft. The rotary type actuator has at least one arm for the magnetic head at its front end. A first flat cable has one end connected to the rotary type actuator, for making an electrical connection to the electronics in the disk device. A second flat cable is provided on the side surface of the arm, for electrically connecting the magnetic head to the first flat cable. The first flat cable includes a plurality of lands arranged along an extended direction of the arm. The second flat cable includes a first land group provided at one end of the second flat cable for electrically connecting to the magnetic head. The first land group has a plurality of lands arranged along an extended direction of the arm. A second land group is provided at the other end of the second flat cable for electrically connecting to the first flat cable. The second land group has a plurality of lands arranged along the extended direction of the arm, disposed in face-to-face relationship with the lands of the first flat cable, and a lead pattern is provided for electrically connecting the first land group and the second land group. In this manner, the second flat cable overlaps with the first flat cable at the other end.
摘要:
There is disclosed a semiconductor memory device as a multi-port DRAM having split SAM registers. This memory device comprises a RAM section of which memory area is halved into first and second cell arrays by the value of a specific bit constituting a portion of a column address, a SAM section comprised of first and second registers, first and second data transfer paths for carrying out data transfer from the first and second cell arrays to the first and second registers, respectively, third and fourth data transfer paths for shifting data from the first and second cell arrays to the second and first data transfer paths, respectively, and first, second third and fourth transfer controllers are inserted into the first, second third and fourth data transfer paths, respectively. Thus, with this multi-port DRAM, the degree of freedom of mapping is improved in a frame buffer.
摘要:
An electrode for an electrochemical capacitor which contains an electrode, a collector, an electrolyte solution and a separator, wherein the electrode contains at least a conductive material and a polyimide silicone of formula (1) having an average molecular weight of 5,000-150,000.