摘要:
A low-cost package for semiconductors that is superior in heat dissipation and capable of preventing the cracking of semiconductor elements at the time of mounting, and a semiconductor module employing the package. The package for semiconductors comprises a CVD diamond substrate 22 made of an independent diamond lamina, and a highly heat-conductive metallic member 21 bonded with the substrate. Semiconductor elements such as MMICs are mounted on an area 25 for mounting semiconductor elements. The CVD diamond substrate 22 may be replaced by a composite in which a CVD diamond layer is formed on a base material having thermal conductivity of 100 W/m·K or more. The provision of protuberances 26 of the metallic member 21 around the CVD diamond substrate 22 prevents the leakage of microwaves and millimeter waves.
摘要:
An initial single-crystalline diamond base material is prepared from a flat plate having a major surface and side surfaces consisting of low-index planes. Then, single crystalline diamond is homoepitaxially vapor-deposited on the single-crystalline diamond base material, and a resulting diamond material is cut and polished in a particular manner to provide a successive base material on which single-crystalline diamond is again grown, thereby forming a single-crystalline diamond having a large area. A holder for the single-crystalline diamond base material consists of or is coated with a material hardly forming a compound with carbon. Single crystalline diamond can be stably formed on the surfaces of the base material. Consequently, single-crystalline diamond of high quality having a large area can be stably produced in a shorter time using either plasma CVD or a thermal filament method.
摘要:
A photonic crystal laser comprises an n-type substrate, an n-type clad layer, an active layer, a p-type clad layer, a photonic crystal layer, a p-type electrode, an n-type electrode and a package member. The n-type clad layer is formed on a first surface of the n-type substrate. The active layer is formed on the n-type clad layer. The p-type clad layer is formed on the active layer. The photonic crystal layer is formed between the n-type clad layer and the active layer or between the active layer and the p-type clad layer, and includes a photonic crystal portion. The p-type electrode is formed on the photonic crystal portion. The n-type electrode is formed on a second surface, and includes a light-transmitting portion arranged on a position opposed to the photonic crystal portion and an outer peripheral portion having lower light transmittance than the light-transmitting portion.
摘要:
An information processor includes a storage part configured to store multiple hierarchically correlated data elements; a metadata storage part configured to store the metadata of each of the data elements; an editing part configured to edit the metadata stored in the metadata storage part; and a reflection part configured to reflect the result of editing the metadata of one of the data elements by the editing part in the metadata of at least one of the remaining data elements.
摘要:
A light emitting device having a simple structure that can be easily manufactured, attaining high light emitting efficiency stably for a long time is obtained, which light emitting device includes: a GaN substrate as a nitride semiconductor substrate and, on a first main surface of the nitride semiconductor substrate, an n-type AlxGa1-xN layer, a p-type AlxGa1-xN layer positioned further than the n-type AlxGa1-xN layer viewed from the nitride semiconductor substrate, and a quantum well positioned between the n-type AlxGa1-xN layer and the p-type AlxGa1-xN layer. In the light emitting device, specific resistance of the nitride semiconductor substrate is at most 0.5 Ω·cm, the side of p-type AlxGa1-xN layer is mounted face-down, and the light is emitted from the second main surface 1a that is opposite to the first main surface of the nitride semiconductor substrate. The second main surface 1a of nitride semiconductor substrate has trenches formed therein.
摘要翻译:获得具有简单结构的发光器件,其可以容易地制造,长时间稳定地获得高发光效率,该发光器件包括:GaN衬底作为氮化物半导体衬底,并且在第一主表面上 氮化物半导体衬底,n型Al x Ga 1-x N层,从氮化物半导体衬底观察的位于比n型Al x Ga 1-x N层更远的p型Al x Ga 1-x N层,以及位于n型Al x Ga 1-x N层之间的量子阱 -xN层和p型Al x Ga 1-x N层。 在发光器件中,氮化物半导体衬底的比电阻为0.5Ω·cm以下,p型Al x Ga 1-x N层的侧面朝下地安装,并且从第二主表面1a射出光 与氮化物半导体衬底的第一主表面相对。 氮化物半导体衬底的第二主表面1a具有形成在其中的沟槽。
摘要:
An electron-emitting element comprises a diamond substrate, and a diamond protrusion grown on a surface of the diamond substrate so as to have a pointed portion in a form capable of emitting an electron. Since the diamond protrusion formed by growth has a sharply pointed tip portion, it can fully emit electrons. Preferably, the surface of the diamond substrate is a {100} face, and the diamond protrusion is surrounded by {111} faces.
摘要:
A facsimile apparatus processes a predetermined signal from a second external apparatus by means of correlating a first external apparatus with the second external apparatus if the facsimile apparatus is communicating with the first external apparatus when the second external apparatus transmits the predetermined signal to the facsimile apparatus. The signal is used for the operative connection between the facsimile apparatus and the second external apparatus. According to the present invention, the second external apparatus is prevented from frequently transmitting the predetermined signal to the facsimile apparatus. The present invention is applicable to a facsimile apparatus used for an integrated digital network.
摘要:
The present invention relates to a method for producing human eosinophils from human pluripotent stem cells. More specifically, the present invention provides a method for producing human eosinophils from human pluripotent stem cells, which method comprises the steps of: (1) co-culturing, in the presence of VEGF, human pluripotent stem cells with cells separated from the AGM region of a mammalian fetus; (2) performing suspension culture using a medium comprising IL-3, IL-6, Flt3 ligand, SCF, TPO and serum; (3) performing suspension culture using a medium comprising IL-3, SCF, GM-CSF and serum; and, optionally, (4) performing suspension culture using a medium comprising IL-3, IL-5 and serum.
摘要:
In one embodiment, components within different hierarchical document levels of a document have individual access rights and various hierarchical relationships with other components on different hierarchical levels within the document. Rules for automatically propagating changes in access rights for subordinate document components to superordinate document components are maintained. When an access right for a subordinate document component is changed, the change is automatically propagated to one or more superordinate document components, if permitted by the associated rules.
摘要:
A photonic crystal laser comprises an n-type substrate, an n-type clad layer, an active layer, a p-type clad layer, a photonic crystal layer, a p-type electrode, an n-type electrode and a package member. The n-type clad layer is formed on a first surface of the n-type substrate. The active layer is formed on the n-type clad layer. The p-type clad layer is formed on the active layer. The photonic crystal layer is formed between the n-type clad layer and the active layer or between the active layer and the p-type clad layer, and includes a photonic crystal portion. The p-type electrode is formed on the photonic crystal portion. The n-type electrode is formed on a second surface, and includes a light-transmitting portion arranged on a position opposed to the photonic crystal portion and an outer peripheral portion having lower light transmittance than the light-transmitting portion.