Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Sumitomo Rubber Industries Limited

The Goodyear & Tire Rubber Company

Matsushita Electric Industrial Co., Ltd.

Masahiro Hikita

Manabu Yanagihara

Tetsuzo Ueda

Yasuhiro Uemoto

Tsuyoshi Tanaka

Hideyuki Okita

Takahiro Sato

Daisuke Ueda

Hiroaki Ueno

Hiroto Yamagiwa

Yutaka Hirose

Hidetoshi Ishida

Daisuke Shibata

Akihiko Nishio

Kenichiro Tanaka

Hidekazu Umeda

Ayanori Ikoshi

Kazushi Nakazawa

Hisayoshi Matsuo

Hidenori Takeda

Yusuke Kinoshita

Masayuki Kuroda

Satoshi Nakazawa

Neill Rampton

Kyosuke Kono

Kazuhiro Kaibara

Shingo Hashizume

Shizuya Aoki

Keiichi Matsunaga

Tuyoshi Tanaka

A semiconductor device includes third active regions that connect two finger-end portions of field effect transistors (FETs) spaced apart from each other, and includes, above the third active regions, portions of a third nitride semiconductor layer that includes P-type impurities.

High voltage nitride semiconductor device

A semiconductor device includes: a substrate; a first nitride semiconductor layer above the substrate; a second nitride semiconductor layer above the first nitride semiconductor layer and being greater than the first nitride semiconductor layer in band gap; and a first field-effect transistor including a first source electrode, a first drain electrode, and a first gate electrode that are above the second nitride semiconductor layer, the first source electrode and the first drain electrode being separated from each other, the first gate electrode being disposed between the first source electrode and the first drain electrode. The first field-effect transistor includes a third semiconductor layer that is above the second nitride semiconductor layer in part of a region between lower part of the first source electrode and the first gate electrode, and is separated from the first gate electrode. The third semiconductor layer and the first source electrode are electrically connected.

Semiconductor device

A semiconductor device includes: a substrate; a first nitride semiconductor layer on the substrate; a second nitride semiconductor layer on the first nitride semiconductor layer; finger-shaped source electrodes on the second nitride semiconductor layer; finger-shaped drain electrodes disposed so as to be spaced apart from the source electrodes; and finger-shaped gate electrodes respectively disposed between the source electrodes and the drain electrodes. The gate electrodes are electrically connected, via a first gate integrated wiring, a plurality of second gate integrated wirings and a third gate integrated wiring, to gate pads located on one or both ends of the third gate integrated wiring. A plurality of source pads and the plurality of second gate integrated wirings are formed alternately in a first direction perpendicular to the longitudinal direction of the gate electrodes.

Semiconductor device and semiconductor component including the same

A nitride semiconductor device includes a semiconductor layered structure including a substrate, a channel layer, and a barrier layer. The channel layer is formed above the substrate and made of a nitride semiconductor layer. The barrier layer is formed on the channel layer, has a wider band gap than the channel layer, and is made of a nitride semiconductor layer. The semiconductor layered structure includes an isolation region in which impurities are implanted. The position of an impurity concentration peak in the depth direction in the isolation region is deeper than the interface between the barrier layer and the channel layer. The concentration of the impurities at the interface between the barrier layer and the channel layer in the isolation region is lower than the concentration at the impurity concentration peak.

Nitride semiconductor device with suppressed leakage current and method of fabricating the same

The semiconductor device includes: a semiconductor substrate; a first transistor disposed above the semiconductor substrate and including a first source electrode, a first gate region, and a first drain electrode; and a second transistor disposed above the semiconductor substrate and including a second source electrode, a second gate region, and a second drain electrode. The first source electrode, the second gate region, and the second source electrode are substantially at an identical potential. The first drain electrode and the second drain electrode are substantially at an identical potential.

Semiconductor device including electrodes with identical potential

A tread surfaceof the tireincludes a center portion C and a pair of shoulder portions S. A contour line of the tread surfaceis divided into ten parts. Among the ten parts, two parts including an equator PC are represented by arcs, and two parts including ends PE of the tread surface, respectively, are represented by arcs. A degree of curvature of each shoulder portion S is higher than a degree of curvature of the center portion C. A ratio of the degree of curvature of the shoulder portion S to a width TW of the tread surfaceis not less than 50%. A ratio of the degree of curvature of the center portion C to the width TW of the tread surfaceis not greater than 70%.

Motorcycle tire

An integrated semiconductor device includes an Si substrate, and a high-side transistor and a low-side transistor which configure a half-bridge. A source electrode of a unit transistor configuring the high-side transistor and a drain electrode of a unit transistor configuring the low-side transistor are integrated as a common electrode.

Integrated semiconductor device

A motorcycle tire for running on rough terrain includes a tread portion. The tread portion includes a base surface and a plurality of blocks. The blocks include a crown block arranged on a tire equator side and a shoulder block arranged on a tread edge side. A height of the shoulder block from the base surface is larger than a height of the crown block from the base surface. The shoulder block is provided on the base surface side with a base portion that has a locally increased cross-section taken along the base surface.

Motorcycle tire for rough terrain

To improve uneven wear resistance performance while maintaining drainage performance. A tyre is provided with a plurality of inclined grooves in a tread portion. Each of the inclined grooves includes a first portion arranged on a crown region side, a second portion arranged on a shoulder region side, and a third portion connecting between the first portion and the second portion. In a ground contacting surface of the tread portion, the third portion has a groove width smaller than the first portion and the second portion. The third portion includes an outer portion arranged on the ground contacting surface side and an inner portion arranged radially inside the outer portion. The inner portion has a groove width larger than the outer portion.

Tyre

To improve uneven wear resistance performance while maintaining drainage performance. A tyre is provided with a plurality of inclined grooves in a tread portion. Each of the inclined grooves extends from a crown region to a shoulder region. Each of the inclined grooves includes a first portion arranged on the crown region side, a second portion arranged on the shoulder region side, and a third portion connecting between the first portion and the second portion. The third portion has a groove width smaller than the first portion and the second portion. The first portion, the second portion, and the third portion are inclined to the same side with respect to the tyre circumferential direction.

A tyre for running on rough terrain includes a tread portion. The tread portion includes a crown region, middle regions, and shoulder regions. The crown region is provided with a plurality of crown blocks. The middle regions are provided with a plurality of middle blocks. The shoulder regions are provided with a plurality of shoulder blocks. Each of the middle blocks is connected with at least one of the crown blocks by a crown tie bar and connected with at least one of the shoulder blocks by a shoulder tie bar. A land ratio of the shoulder regions is 90% or more and 115% or less of a land ratio of the crown region.

Tyre for running on rough terrain

A tyre includes a tread portion provided with blocks each protruding toward a ground contact surface thereof from a tread bottom surface, and axially spaced side portions each extending from the tread portion to a respective bead portion. The blocks include shoulder blocks spaced. The shoulder blocks each include an overhanging portion located axially outside the corresponding side portion. The overhanging portion includes a pair of first walls extending in substantially parallel with a tyre meridian cross-section. The shoulder blocks have shoulder block lengths which are lengths in the tyre circumferential direction measured between the pair of first walls along the ground contact surface, wherein the shoulder block lengths are shorter than gap lengths which are lengths in the tyre circumferential direction measured on the tread bottom surface between adjacent shoulder blocks.

Tire and tire set

A nitride semiconductor device includes: a substrate; a first nitride semiconductor layer disposed above the substrate; a second nitride semiconductor layer disposed above the first nitride semiconductor layer and having a band gap larger than a band gap of the first nitride semiconductor layer; a third nitride semiconductor layer selectively disposed above the second nitride semiconductor layer and containing a p-type first impurity element; a high resistance region disposed in the third nitride semiconductor layer, the high resistance region containing a second impurity element and having a specific resistance higher than a specific resistance of the third nitride semiconductor layer; and a gate electrode disposed above the high resistance region, wherein an end of the high resistance region is inside a surface end of the third nitride semiconductor layer.

Nitride semiconductor device and method for manufacturing the same

A nitride semiconductor device includes: a substrate; a first nitride semiconductor layer; a second nitride semiconductor layer having a greater band gap than the first nitride semiconductor layer; a source electrode and a drain electrode on the second nitride semiconductor layer apart from each other; a third nitride semiconductor layer, between the source electrode and the drain electrode, containing a p-type first impurity and serving as a gate; and a fourth nitride semiconductor layer, between the third nitride semiconductor layer and the drain electrode, containing a p-type second impurity, wherein the average carrier concentration of the fourth nitride semiconductor layer is lower than the average carrier concentration of the third nitride semiconductor layer.

Nitride semiconductor device and method for manufacturing same

The disclosure provides a method of manufacturing a motorcycle tire for uneven terrain travel in which both a rigid feeling at the time of driving and a shock absorbing ability are able to be achieved. Provided is a method of manufacturing a motorcycle tire for uneven terrain travel including a process of molding a green tire including a tread portion, a pair of sidewall portions and a pair of bead portions, and a vulcanization process of vulcanizing the green tire using a mold. In the mold, a clip width, which is a distance in a tire axial direction between a pair of bead molding surfaces which form outer surfaces of the pair of bead portions, is 100% to 110% of a rim width of a normal rim to which a completed motorcycle tire is attached.

Growing community of inventors

Hyogo, Japan

Masahiro Hikita