摘要:
A semiconductor device according to the present invention includes: a semiconductor substrate; a channel layer formed on the semiconductor substrate; a donor layer formed on the channel layer; a first Schottky layer formed on the donor layer; a second Schottky layer formed on the first Schottky layer; a first gate electrode formed on the first Schottky layer to form a Schottky barrier junction with the first Schottky layer; a first source electrode and a first drain electrode formed so as to sandwich the first gate electrode and electrically connected to the channel layer; a second gate electrode formed on the second Schottky layer and made of a material different from the first gate electrode to form a Schottky barrier junction with the second Schottky layer; and a second source electrode and a second drain electrode formed so as to sandwich the second gate electrode and electrically connected to the channel layer.
摘要:
When the DRM mode indicated by a client terminal 1 differs from DRM (Digital Rights Management) modes available to a license server 2 and a distribution server 4, the license server 2 requests a DRM mode converting server 6 to convert the DRM mode of the multimedia contents. When the DRM mode converting server 6 receives the conversion request of the DRM mode, it converts the DRM mode of the multimedia contents distributed from the distribution server 4 to the DRM mode available to the client terminal 1, and transfers the multimedia contents passing through the conversion to the client terminal 1.
摘要:
A portable terminal apparatus with a telephone function such as a portable telephone, for efficiently emitting a voice from a speaker from both a front face and a backside of a housing. The portable terminal has: a first cover that includes a first sound outlet for emitting a sound from the speaker through the front of the portable terminal apparatus; a second cover that includes a second sound outlet for emitting a sound from the speaker through the back of the portable terminal apparatus; and a gasket accommodated at a position sandwiched between the first cover and the speaker.
摘要:
A portable terminal apparatus with a telephone function and a camera module. The apparatus includes a chassis, a camera module including a lens and an image pickup device, a circuit board placed and fixed on the chassis and a camera holder supporting the camera module and fixed on the circuit board to be on the chassis together with the circuit board. The camera holder has an opening for the camera module to look in and a wall section surrounding the opening and surrounding a side face of the camera module to support the camera module.
摘要:
An optical pickup includes at least a laser light source emitting a laser beam, a collimator lens system including a plurality of lenses for collimating the light beam emitted from the laser light source and incident thereupon as diffused light, and an objective lens. The laser beam transmitted through the collimator lens system is incident upon the objective lens. The collimator lens system includes a first lens unit held so as to be movable in an optical axis direction of the laser beam and a fixed second lens unit.
摘要:
This connector configuration comprises: a fixing member that is a component of a connector and is fixed to a substrate in order to mount the connector onto the substrate; a case that is a component of the connector and has an installation groove formed thereon, into which the fixing member is installed; and a regulating portion provided at either one of the fixing member and the case along the direction of installation of the fixing member to the case. A regulating groove is provided along the direction of installation on the other one of the fixing member and the case, and when the fixing member is installed onto the case, the regulating portion is guided along the regulating groove and tilting of the fixing member relative to the direction of installation is controlled.
摘要:
A fixing member of the present invention can be mounted to a fixed member that is fixed to a printed circuit board, and is used for fixing the fixed member to the printed circuit board, the fixing member including: a male connector portion inserted into an insertion opening formed in the printed circuit board; a plurality of arm portions provided at the male connector portion; lug portions provided at each tip end side of the arm portions and engaged with an opening edge of the insertion opening; and a lug-guiding portion extending out from a tip end portion of at least one lug portion to guide the lug portion to the insertion opening when the lug-guiding portion comes in contact with the opening edge and is further pressed.
摘要:
A fixing member is used for fixing a case to a printed circuit board. The fixing member is mounted at a mount-receiving portion, which is formed at the case, by being inserted along a side wall of the mount-receiving portion. At the fixing member, a plate spring portion is formed at a predetermined position. The plate spring portion projects to a side of abutting against the side wall. In the state in which the fixing member is mounted at the mount-receiving portion, the plate spring portion is pressed by the side wall and flexes. Consequently, the fixing member is subject to a pressure force in a direction away from the side wall. In addition, the fixing member is supported from a rear face side by support portions which structure the mount-receiving portion. Thus, the fixing member is gripped in a direction intersecting the side wall.
摘要:
An ion trap/time-of-flight mass spectrometer, which can perform accurate mass measurement of a product ion based on MS/MS and MSn has an ion source for ionizing a sample, an ion trap capable of temporarily trapping ions, and a time-of-flight mass spectrometer. The ion source produces ions of the sample as a measurement target and ions of a reference sample each having a known mass value. A precursor ion is selected from among the ions of the measurement target sample, and the selected precursor ion is excited and fragmented in the ion trap to produce a product ion. The reference sample ions are introduced to and trapped in the ion trap. The trapped product ion and reference sample ions are expelled out of the ion trap and introduced to the time-of-flight mass spectrometer, thereby obtaining a mass spectrum.
摘要:
The invention provides a mass analysis method and apparatus capable of identifying proteins or peptides at greater speed and with improved accuracy. Specifically, a mass analysis method whereby a sample is ionized and a protein is analyzed using a mass analysis apparatus is provided, said method comprising: selecting predetermined information from a database in which information about proteins and peptides is stored, estimating the mass of the selected component, and calculating frequency information for each mass; analyzing a sample using a mass analysis apparatus so as to acquire a mass spectrum, selecting, based on the acquired mass spectrum and said frequency information, a mass to be used for identification, performing mass analysis using the mass spectrum of the selected mass as a precursor ion, and performing an identification process using a resultant mass spectrum. The method allows a precursor ion for obtaining an MS/MS spectrum required for identification processing to be efficiently selected using the frequency information matched with the purpose of analysis.