Sony Corporation

Nec Corporation

Renesas Electronics Corporation

Yasuhiro Murase

Jun Moriya

Shinsuke Yamashita

Hiroyuki Kikkoji

Nozomu Okuzawa

Takeshi Iwatsu

Noriyuki Sakoh

Yasuhiro Okamoto

Hironobu Miyamoto

Takashi Inoue

Yuji Ando

Tatsuo Nakayama

Kazuki Ota

Akio Wakejima

Naotaka Kuroda

Katsumi Yamanoguchi

Susumu Yamahara

Yoshiyuki Takaku

Kensuke Kasahara

Hidenori Shimawaki

Kohji Matsunaga

Junichi Nakamura

Satoshi Araki

Naoki Yuasa

Toshikazu Minoshima

Natsumi Saito

In a group III nitride-type field effect transistor, the present invention reduces a leak current component by conduction of residual carriers in a buffer layer, and achieves improvement in a break-down voltage, and enhances a carrier confinement effect (carrier confinement) of a channel to improve pinch-off characteristics (to suppress a short channel effect). For example, when applying the present invention to a GaN-type field effect transistor, besides GaN of a channel layer, a composition-modulated (composition-gradient) AlGaN layer in which aluminum composition reduces toward a top gradually or stepwise is used as a buffer layer (hetero buffer). To gate length Lg of a FET to be prepared, a sum a of layer thicknesses of an electron supply layer and a channel layer is selected so as to fulfill Lg/a&#x2265;5, and in such a case, the layer thickness of the channel layer is selected in a range of not exceeding 5 times (about 500 &#x212b;) as long as a de Broglie wavelength of two-dimensional electron gas accumulated in the channel layer in room temperature.

Field effect transistor, and multilayered epitaxial film for use in preparation of field effect transistor

The semiconductor device has a barrier layer formed on a channel layer, an n type diffusion preventing layer formed on the barrier layer and containing aluminum, and a source electrode and a drain electrode formed on the diffusion preventing layer. The semiconductor device further has a p type cap layer formed on the diffusion preventing layer sandwiched between the source electrode and the drain electrode and a gate electrode formed on the cap layer. The diffusion preventing layer has an aluminum composition ratio greater than the aluminum composition ratio of the barrier layer.

Semiconductor device

A content receiving apparatus including a receiver receiving first contents from a broadcasting station, a temporary memory unit temporarily storing first contents-related information related to the first contents, a memory storing the first contents and storing, based on an input recording request, the first contents-related information; and the memory storing a plurality of second contents and a plurality of second contents-related information received from a server, the second contents-related information being related to the first contents, and displayable.

Recording device, recording method, and program

In a group III nitride-type field effect transistor, the present invention reduces a leak current component by conduction of residual carriers in a buffer layer, and achieves improvement in a break-down voltage, and enhances a carrier confinement effect (carrier confinement) of a channel to improve pinch-off characteristics (to suppress a short channel effect). For example, when applying the present invention to a GaN-type field effect transistor, besides GaN of a channel layer, a composition-modulated (composition-gradient) AlGaN layer in which aluminum composition reduces toward a top gradually or stepwise is used as a buffer layer (hetero buffer). To gate length Lg of a FET to be prepared, a sum a of layer thicknesses of an electron supply layer and a channel layer is selected so as to fulfill Lg/a&#x2267;5, and in such a case, the layer thickness of the channel layer is selected in a range of not exceeding 5 times (about 500 &#x212b;) as long as a de Broglie wavelength of two-dimensional electron gas accumulated in the channel layer in room temperature.

In a content supply system, content data is supplied from a content supply apparatus to a content playback apparatus via a network. The content playback apparatus includes a request device for requesting a recovery process; an obtaining device for obtaining a start-up file; and a download device for downloading the content data. The content supply apparatus includes a customer information management device for managing customer information; a notification device for notifying the recovery information to the content playback apparatus; a start-up file generation device for generating a start-up file; a storage device for storing the start-up file; a content data supply device for allowing the content data to be downloaded; and a license data supply device for allowing the license data to be downloaded.

Content supply system, content supply apparatus and method, content playback apparatus and method, and program

Disclosed is an HJFETwhich comprises: a channel layercomposed of InGaN (0&#x2266;y&#x2266;1); a carrier supply layercomposed of AlGaN (0&#x2266;x&#x2266;1), the carrier supply layerbeing provided over the channel layerand including at least one p-type layer; and a source electrodeS, a drain electrodeD and a gate electrodewhich are disposed facing the channel layerthrough the p-type layer, and provided over the carrier supply layer. The following relational expression is satisfied: 5.6&#xd7;10x&#x3c;N&#xd7;&#x3b7;&#xd7;t [cm]&#x3c;5.6&#xd7;10x, where x denotes an Al compositional ratio of said carrier supply layer, t denotes a thickness of said p-type layer, Ndenotes an impurity concentration, and &#x3b7; denotes an activation ratio.

Field effect transistor with reduced gate leakage current

A user sets an apparatus name easily identified by the user to a terminal, transmits the apparatus name together with user identification information to a terminal management server for managing a terminal, and the terminal management server registers the apparatus name as associated with the user identification information, thereby allowing the terminal management server to uniquely identify each terminal based on the apparatus name associated with the user identification information. Furthermore, a user can easily identify an apparatus name, thereby realizing a service utilizing system capable of reducing the laborious procedure of operating the terminal management server, and easily identifying each terminal.

Service use method and management method

A data-processing method of receiving broadcast contents and content-related information related to the broadcast contents. The method includes setting a frequency for receiving the broadcast contents from the broadcast station, and recording frequency information corresponding to the set frequency. The method also includes transmitting request information including broadcast station ID identifying the broadcast station corresponding to the frequency information to a server.

Data-processing apparatus, data-processing method and data-processing program

Disclosed is an HJFETwhich comprises: a channel layercomposed of InGaN (0&#x2266;y&#x2266;1); a carrier supply layercomposed of AlGaN (0&#x2266;x&#x2266;1), the carrier supply layerbeing provided over the channel layerand including at least one p-type layer; and a source electrodeS, a drain electrodeD and a gate electrodewhich are disposed facing the channel layerthrough the p-type layer, and provided over the carrier supply layer. The following relational expression is satisfied: 5.6&#xd7;10x&#x3c;N&#xd7;&#x3b7;&#xd7;t [cm]&#x3c;5.6&#xd7;10x, where x denotes an Al compositional ratio of the carrier supply layer, t denotes a thickness of the p-type layer, Ndenotes an impurity concentration, and &#x3b7; denotes an activation ratio.

Request informationis transmitted from a transmission meansof a communication deviceto a server. Then, related informationcorresponding to the request informationand an identification codeare obtained and transmitted to the communication deviceby a transmission means. The related informationand identification codeare stored in a storage meansof the communication device. Thereafter, purchase request informationis transmitted to the serverby the transmission means. This purchase request informationis added with an identification codeand user identification information. Then, content datacorresponding to the purchase request informationand additional datacorresponding to the identification codeare transmitted to the communication deviceby the transmission meansof the server

Information processing device, information processing method, and information processing program

Set information including information identifying one or more areas of operation of a broadcast terminal apparatus and a user ID, and broadcast-station information including a name and an identification data item of a broadcast station are stored. The broadcast-station information is stored in association with an area in which a broadcast signal output by the broadcast station can be received. An information-processing apparatus includes a detecting unit that retrieves the name or the identification data item of the broadcast station upon a reception of information identifying one of the one or more areas of operation and the user ID. The information-processing apparatus also includes a transmitting/receiving unit that receives the reception, transmits a transmission of the name or the identification data item of the broadcast station upon the reception, and receives an indicator of the broadcast station and an indicator of the user ID in response to the transmission.

A first communication apparatusstores a first customer information registered by a user in order to receive a first service. A second communication apparatusstores a first customer information registered by the user in order to receive a second service. A transmission meanof a third communication apparatustransmits request information requesting to receive the first service to the first communication apparatustogether with identification information of the user. A reception meanreceives customer information necessary for user registration for the first service from the first communication apparatusaccording to the transmission of the request information. When the customer information necessary for the user registration for the first service is already included in second customer information, a display meandisplays the customer information in the second customer information on an input screen for user registration. Therefore, input of customer information of a user is facilitated in the case in which user registration is performed in plural communication apparatuses.

Communication system and communication method

A processing unit detects whether externally input user personal information has been stored in a storage medium. A network interface transmits a transmission of available/unavailable request information identifying a broadcast station that broadcast received broadcast information, if the externally input user personal information has not been stored in the storage medium. The network interface receives available/unavailable information in a reply to the transmission. The available/unavailable information shows whether an external device offers a service providing related information about contents included in the received broadcast information. The network interface transmits the externally input user personal information to the external device to request a user registration in accordance with the available/unavailable information, if the processing unit detects that the externally input user personal information is not stored in the storage medium. The network interface transmits request information that requests the related information about the contents.

Communication device, communicate method for communication device, and communication program for communication device

The present invention provides a display device for retrieving and displaying the list information regarding the broadcast contents in which the list information corresponding to the program broadcast before or after can be displayed without making the complicate key operations. An information servertransmits a list of musical compositions broadcast in a designated time zone to a terminal unit, based on a retrieval key such as date and time zone from the terminal unit. The terminal unitdisplays the received list of musical compositions on a display part. At this time, the directive items for displaying the list of musical compositions broadcast before and after are displayed, together with the received list of musical compositions. The user is allowed to display the list of musical compositions broadcast in a preceding or succeeding time zone only by selecting a directive item by performing an operation in series with a selection operation for a musical composition within the list of musical compositions, without returning to other screen, or re-specifying the retrieval conditions.

Growing community of inventors

Tokyo, Japan

Yasuhiro Murase