摘要:
A method for fabricating a buried semiconductor laser device including the steps of: forming a mesa structure including a bottom cladding layer, an active layer and a top cladding layer overlying an n-type semiconductor substrate; and forming a current confinement structure by growing a p-type current blocking layer and an n-type current blocking layer on each side surface of the mesa structure and on a skirt portion extending from the each side surface, the p-type current blocking layer being fabricated by using a raw material gas containing a group III element gas and a group V element gas at a molar ratio between 60 and 350 inclusive. In this method, the semiconductor laser device including the current confinement structure with the specified leakage current path width can be fabricated with the excellent reproducibility.
摘要:
In a PCR reaction, an extremely minute amount of a solution introduced by an ink-jet method is retained on a substrate for a long period of time without evaporation. On a substrate, a layer of liquid, that is hardly miscible with an extremely minute amount of a solution (minute droplet) intended to be retained, is formed. In the liquid layer, a minute droplet is held in contact with a surface of the substrate. If the minute droplet is aqueous, the liquid layer coated over the surface of the substrate may be oily.
摘要:
Detection probes and a method of detection for the detection of a specimen having a specified sequence in a sample are disclosed that utilize two fluorophore-labeled (donor and acceptor) probes which are designed to display changes in a fluorescence decay curve by their hybridization to the specific sequence of a specimen, thus allowing for the detection with great accuracy and high sensitivity, particularly under the conditions where the probes may be abundant relative to the specimen in the sample.
摘要:
A solid phase comprising at least one pair of probes which are capable of sequentially hybridizing with a particular target nucleic acid sequence is provided. The probe pair(s) are immobilized on the solid phase through a linker portion wherein they occupy a restricted spatial arrangement such that they can be ligated by an enzyme when the they sequentially hybridize to a selected target sequence. In addition a method wherein the solid phase is utilized to detection a target nucleic acid is disclosed.
摘要:
A disc device which includes a rotary drive mechanism for rotating a replaceable recording medium. An unbalance correcting mechanism adapted to correct unbalance is incorporated in a rotary body rotating unit in the rotary drive mechanism, and includes a holding system having a holding member for holding the rotary drive mechanism and a head having at least a reproducing function. Further included is a support member composed of resilient members, for supporting a casing and a unit holder to each other. The holding system has a natural frequency higher than 30 Hz but lower than 70 Hz, and exhibits a transmission characteristic having a lift-up degree of higher than 8 dB at a resonant point.
摘要:
The present invention provides a magnetic recording medium wherein the surface layer of the protective film of the medium is irradiated by ions to give a protective film having high reliability in resistance to sliding with the magnetic head, a process for producing the medium, an apparatus for producing the medium, and a magnetic recording apparatus having the medium mounted therein. The essentials of the present invention lie in introducing a minute surface roughness of atomic order in the surface of the protective film 5 constituting the outermost layer of a magnetic recording medium by irradiating atoms accelerated by high voltage (that is, by implanting ions) to the surface.
摘要:
A device for controlling the angle of an optical axis of a headlamp which is advantageous in which the device is compact, light-weight and relatively inexpensive to manufacture and in which accurate optical axis angle control that corresponds to the operation of the operation switch can be achieved at all times regardless of the number of optical axis angle controllers used.The device comprises: an operation switch which includes a potentiometer for setting a control voltage, a motor which variably controls the angle of the optical axis of the headlamp based upon the control voltage generated by the operation switch, an optical axis angle voltage generator that includes a potentiometer for generating an optical axis angle voltage of the headlamp which is variably controlled by the motor, and a comparative controller which compares the optical axis angle voltage with the control voltage and then causes the motor to rotate in a direction in which the difference between the two voltages disappears. The optical axis angle voltage generator further includes a voltage setting resistance R connected in series to a power supply, and the potentiometer of this voltage generator is in a parallel connection with the potentiometer of the operation switch.
摘要:
A structure for mounting a flexible membrane weir to banks 2 and a crest 1 formed on a river bed between the above-mentioned banks and having a crest surface 1a of arc shape in cross-section. A trigonal-pyramid-shaped fillet 3 is provided at an intersecting portion between a crest surface on the upstream side of the top of the crest and the bank, and an upstream side edge of a toe of slope 5a of a flexible membrane 5 is fixed to this fillet 3.
摘要:
A plurality of cutting tips are mounted on the distal end of the cylindrical main body of a drilling tool for performing trepanning. These tips are disposed along the circumferential direction of the main body and equidistantly spaced apart from one another. The force, which is produced by all of the cutting tips and acting at right angles to the axis of the main body, is smaller than the component of the cutting force, which is produced by each tip and acting at right angles to the axis of the main body. The cutting widths of the tips in the radial direction of the main body are substantially equal. One of the tips, which is located at an intermediate position in the radial direction, has a V-shaped leading portion.
摘要:
In a blank sheet of a case for packaging a video tape cassette having main panels 1, 2, a black panel 3, and side panels 4, 5, 14, 15, side flaps 11, 12 are projectingly provided from the end edges of the side panels 4, 5 belonging to one main panel 1 toward the side panels 14, 15 belonging to the other main panel 2, and when, at the time of case forming, these side flaps 11, 12 are placed into the inner side of the back panel 3, and hot air is supplied into wedge-shaped spaces W between the opposed side flaps, 4, 14 and 5, 15 thereby to fusion bond the opposed side flaps, the hot air is prevented from reaching the cassette inserted beforehand into the case.