摘要:
An ophthalmic apparatus includes an optical system configured to illuminate a subject's eye with light generated by a light source, a first reflection portion including a reflection surface for reflecting the light generated by the light source and a transmission portion, and a light amount detection unit configured to detect an amount of light generated by the light source via the transmission portion. The first reflection portion is disposed in a direction opposite to a direction of the light generated by the light source toward the subject's eye.
摘要:
The semiconductor device has a stacked structure in which a p-GaN layer 32, an SI-GaN layer 62, and an AlGaN layer 34 are stacked, and has a gate electrode 44 that is formed at a top surface side of the AlGaN layer 34. A band gap of the AlGaN layer 34 is wider than a band gap of the p-GaN layer 32 and the SI-GaN layer 62. Moreover, impurity concentration of the SI-GaN layer 62 is less than 1×1017 cm−3. The semiconductor devices comprising III-V semiconductors that have a stable normally-off operation are realized.
摘要翻译:半导体器件具有层叠p-GaN层32,SI-GaN层62和AlGaN层34的堆叠结构,并且具有形成在AlGaN层34的顶面侧的栅电极44 AlGaN层34的带隙比p-GaN层32和SI-GaN层62的带隙宽。另外,SI-GaN层62的杂质浓度小于1×10 17 / SUP> cm 3 -3。 实现了具有稳定的常关断操作的包括III-V半导体的半导体器件。
摘要:
A semiconductor device is formed by a first layer 32 composed of AlGaN, a second layer 42 composed of GaN, a gate electrode 34, a source electrode 38, and a drain electrode 28. The first layer 32 has a region 32a formed between the gate electrode 34 and the second layer 42. A channel is formed in the vicinity of the boundary 24 of the first layer 32 and the second layer 42. The second layer 42 has p-type conductivity and is in contact with the source electrode 38. When electrons flow in the channel, the electrons collide with surrounding atoms, and holes are formed. If holes are accumulated inside the semiconductor device, the presence of the accumulated holes causes dielectric breakdown. In the semiconductor device of the invention, holes are discharged to the outside of the device thorough the second layer 42 and the source electrode 38, and accumulation of holes can be prevented.
摘要:
A semiconductor device has a stacked structure in which a p-GaN layer, an SI-GaN layer, and an AlGaN layer are stacked, and has a gate electrode that is formed at a top surface side of the AlGaN layer. A band gap of the AlGaN layer is wider than a band gap of the p-GaN layer and the SI-GaN layer. Moreover, impurity concentration of the SI-GaN layer is less than 1×1017 cm−3. Semiconductor devices including III-V semiconductors may have a stable normally-off operation.
摘要:
A compound of the formula (I): wherein R1 represents an amino group which may be substituted; R2 represents a carboxy group which may be esterified or amidated; R3, R4, R5 and R6 each represent a hydroxy group which may be protected; Q represents an aryl group which may be substituted; or a salt thereof is disclosed. The compound (I) possesses ant-Helicobacter pylori activity, and is useful in the prevention or treatment of various diseases associated with Helicobacter bacteria, such as duodenal ulcer, gastric ulcer, chronic gastritis and cancer of the stomach.
摘要:
A semiconductor device has a stacked structure in which a p-GaN layer, an SI-GaN layer, and an AlGaN layer are stacked, and has a gate electrode that is formed at a top surface side of the AlGaN layer. A band gap of the AlGaN layer is wider than a band gap of the p-GaN layer and the SI-GaN layer. Moreover, impurity concentration of the SI-GaN layer is less than 1×1017 cm−3. Semiconductor devices including III-V semiconductors may have a stable normally-off operation.
摘要:
A semiconductor device has a stacked structure in which a p-GaN layer, an SI-GaN layer, and an AlGaN layer are stacked, and has a gate electrode that is formed at a top surface side of the AlGaN layer. A band gap of the AlGaN layer is wider than a band gap of the p-GaN layer and the SI-GaN layer. Moreover, impurity concentration of the SI-GaN layer is less than 1×1017 cm−3. Semiconductor devices including III-V semiconductors may have a stable normally-off operation.
摘要:
A drift layer is formed on a substrate. A base region is formed on the drift layer. A plurality of source regions are formed in a surficial layer of the base region. A plurality of gate electrodes face to the base region and the source region via a gate insulating film. A source electrode is brought into contact with the base region and the source region. A nitrogen cluster containing layer is embedded in the drift layer so as to extend laterally under the base region so that at least part of the drift region is left under the nitrogen cluster containing layer.
摘要:
In an electronic control unit, a drive element liable to generate heat and a control processing element liable to be affected by heat are respectively mounted on a drive circuit board and a control circuit board different from each other, and the two boards are connected to each other by a flexible printed circuit board. The bonding portion of the flexible printed circuit board to the control circuit board is a back side portion of a connector mounted on the control circuit board at the same side as the control processing element. Therefore, heat generated by the drive element is suppressed from being transferred to the control processing element without causing layout hindrances.