摘要:
An LED is provided comprising two or more light-emitting Type II interfaces wherein at least two of the Type II interfaces differ in transition energy by at least 5%, or more typically by at least 10%, and wherein at least one of the Type II interfaces is within a pn junction. Alternately, an LED is provided comprising two or more light-emitting Type II interfaces wherein at least two of the Type II interfaces differ in transition energy by at least 5%, or more typically by at least 10%. The Type II interfaces may include interfaces from a layer which is an electron quantum well and not a hole quantum well, interfaces to a layer which is a hole quantum well and not an electron quantum well; and interfaces that satisfy both conditions simultaneously. The Type II interfaces may be within a pn or pin junction or not within a pn or pin junction. In the later case, emission from the Type II interfaces may be photopumped by a nearby light source. The LED may be a white or near-white light LED. In addition, graphic display devices and illumination devices comprising the semiconductor device according to the present invention are provided.
摘要:
An adapted LED is provided comprising a short-wavelength LED and a re-emitting semiconductor construction, wherein the re-emitting semiconductor construction comprises at least one potential well not located within a pn junction. The potential well(s) are typically quantum well(s). The adapted LED may be a white or near-white light LED. The re-emitting semiconductor construction may additionally comprise absorbing layers surrounding or closely or immediately adjacent to the potential well(s). In addition, graphic display devices and illumination devices comprising the adapted LED according to the present invention are provided.
摘要:
A transactional file system performs multiple file system operations as part of a user-level transaction. An application specifies that operations should be handled as part of a transaction, and the application is given a file handle associated with the transaction context. Operations are managed consistent with transactional behavior and data isolation is provided with multiple versions of a file and by tracking copies of pages that have changed. Transactional readers do not receive changes to a file made by transactional writers, until the transactional writer commits the transaction and the reader reopens the file. Logging and recovery are also facilitated by logging page data separate from the main log, with a unique signature that enables the log to determine whether a page was fully flushed to disk prior to a system crash. Namespace isolation is also provided until a transaction commits via isolation directories.
摘要:
A recoil pad for a shoulder firearm includes at least one piston member that is caused to move axially from an initial axial position to a second axial position upon application of the recoil force from the firearm. The axial movement of the piston member causes fluid movement within a column relative to a variable or fixed orifice area wherein the fluid movement causes resistance that absorbs the energy. A mechanical and/or hydraulic and/or elastomeric feature returns the piston to the initial axial position upon cessation of the applied recoiling force.
摘要:
A layered construction is provided comprising an InP substrate and alternating layers of II-VI and III-V materials. The alternating layers of II-VI and III-V materials are typically lattice-matched or pseudomorphic to the InP substrate. Typically the II-VI material is selected from the group consisting of ZnSe, CdSe, BeSe, MgSe, ZnTe, CdTe, BeTe, MgTe, ZnS, CdS, BeS, MgS and alloys thereof, more typically selected from the group consisting of CdZnSe, CdMgZnSe, BeZnTe, and BeMgZnTe alloys, and is most typically CdxZn1−xSe where x is between 0.47 and 0.57. Typically the III-V material is selected from the group consisting of InAs, AlAs, GaAs, InP, AlP, GaP, InSb, AlSb, GaSb, and alloys thereof, more typically selected from the group consisting of InP, InAlAs, GaInAs, AlInGaAs and GaInAsP alloys, and is most typically InP or InyAl1−yAs where y is between 0.47 and 0.57. In one embodiment, the layered construction forms one or more distributed Bragg reflectors (DBR's). In another aspect, the present invention provides a layered construction comprising: an InP substrate and a distributed Bragg reflector (DBR) having a reflectivity of 95% or greater which comprises no more than 15 layer pairs of epitaxial semiconductor materials. In another aspect, the present invention provides a laser comprising a layered construction according to the present invention. In another aspect, the present invention provides a photodetector comprising a layered construction according to the present invention.
摘要翻译:提供了包括InP衬底和II-VI和III-V材料的交替层的分层结构。 II-VI和III-V材料的交替层通常与InP衬底晶格匹配或伪构。 通常,II-VI材料选自ZnSe,CdSe,BeSe,MgSe,ZnTe,CdTe,BeTe,MgTe,ZnS,CdS,BeS,MgS及其合金,更典型地选自CdZnSe, CdMgZnSe,BeZnTe和BeMgZnTe合金,并且最典型的是Cd x 1-x Se Se,其中x在0.47和0.57之间。 通常,III-V材料选自InAs,AlAs,GaAs,InP,AlP,GaP,InSb,AlSb,GaSb及其合金,更典型地选自InP,InAlAs,GaInAs,AlInGaAs 和GaInAsP合金,并且最典型地是InP或In y y 1 y y,其中y在0.47和0.57之间。 在一个实施例中,分层结构形成一个或多个分布式布拉格反射器(DBR)。 另一方面,本发明提供了一种分层结构,其包括:InP衬底和具有95%或更大的反射率的分布式布拉格反射器(DBR),其包括不超过15层的外延半导体材料。 另一方面,本发明提供一种包括根据本发明的分层结构的激光器。 另一方面,本发明提供了一种包括根据本发明的分层结构的光电检测器。
摘要:
A plug retention apparatus for use in securing two plug members together to prevent undesired disengagement. The plug retention apparatus is affixed to a first plug member using a retention ring which provides a means for adjustable positioning via a threaded coupling to facilitate securing a second plug member to the first plug member. A plug clamp may be rotatably positioned about the second plug member retaining the plug members in a desired position.
摘要:
A II-VI semiconductor device includes a stack of II-VI semiconductor layers electrically connected to a top electrical contact. A GaAs substrate is provided which supports the stack of II-VI semiconductor layers and is positioned opposite to the top electrical contacts. A BeTe buffer layer is provided between the GaAs substrate and the stack of II-VI semiconductor layers. The BeTe buffer layer reduces stacking fault defects at the interface between the GaAs substrate and the stack of II-VI semiconductor layers.
摘要:
A printhead with improved durability characteristics and a method for making the same. A substrate is provided which includes an ink ejector system and a barrier layer. An orifice plate having a bottom surface made of rhodium is affixed to the barrier layer so that the rhodium-containing bottom surface is securely attached to the barrier layer. The use of rhodium in the bottom surface provides substantially improved adhesion characteristics without the use of separate adhesives or, alternatively, various adhesives may be optionally be employed including polyacrylic acid and silane compositions. The rhodium-containing bottom surface also provides improved corrosion resistance. As a result, a unique printhead is produced having improved structural integrity levels. The orifice plate may likewise have a top surface made of rhodium. The use of a rhodium-containing top surface provides enhanced abrasion resistance and avoids corrosion problems.
摘要:
The efficiency of writing files that are cached using mapped file I/O is improved by suppressing zeroing of uninitialized data in cached pages of a file until the file is mapped by a user mode thread. In an operating system where paging operations are controlled by a virtual memory manager and memory based caching using mapped file I/O is administered by a cache manager, suppressing zeroing of mapped files on writes is implemented by a set of internal operating system interfaces for communications between the virtual memory manager and the cache manager. When a file being cached is not yet mapped by a user mode thread, the cache manager tracks the extent to which a cache page of the file is written so that any uninitialized data in the cache page can later be zeroed when the file is mapped by a user mode thread.