摘要:
An (Al, Ga, In)N light emitting device, such as a light emitting diode (LED), in which high light generation efficiency is realized by fabricating the device on non-polar or semi-polar III-Nitride crystal geometries. Because non-polar and semi-polar emitting devices have significantly lower piezoelectric effects than c-plane emitting devices, higher efficiency emitting devices at higher current densities can be realized.
摘要:
Lateral epitaxial overgrowth of non-polar III-nitride seed layers reduces threading dislocations in the non-polar III-nitride thin films. First, a thin patterned dielectric mask is applied to the seed layer. Second, a selective epitaxial regrowth is performed to achieve a lateral overgrowth based on the patterned mask. Upon regrowth, the non-polar III-nitride films initially grow vertically through openings in the dielectric mask before laterally overgrowing the mask in directions perpendicular to the vertical growth direction. Threading dislocations are reduced in the overgrown regions by (1) the mask blocking the propagation of dislocations vertically into the growing film and (2) the bending of dislocations through the transition from vertical to lateral growth.
摘要:
A method for growing III-nitride films containing aluminum using Hydride Vapor Phase Epitaxy (HVPE) is disclosed, and comprises using corrosion-resistant materials in an HVPE system, the region of the HVPE system containing the corrosion-resistant materials being an area that contacts an aluminum halide, heating a source zone with an aluminum-containing source above a predetermined temperature, and growing the III-nitride film containing aluminum within the HVPE system containing the corrosion-resistant material.
摘要:
A method for growing an improved quality device by depositing a low temperature (LT) magnesium (Mg) doped nitride semiconductor thin film. The low temperature Mg doped nitride semiconductor thin film may have a thickness greater than 50 nm. A multi quantum well (MQW) active layer may be grown at a growth temperature and the LT Mg doped nitride semiconductor thin film may deposited on the MQW active layer at a substrate temperature no greater than 150° C. above the growth temperature.
摘要:
To detect an address error in flash memory using a different data management unit from that in a hard disk drive. In cache memory, data read/written from/to a flash memory chip is managed in units of first data lengths. A page, which is the data management unit in a flash memory chip, includes a data section of a second data length from/to which a storage controller can read/write data; and a redundant section. When writing data, the storage controller creates a protection code enabling identification of a write destination page address, divides the data in the cache memory, which is managed in units of first data lengths, into pieces so that the size of each set composed of a piece of the divided write data and its protection code will be of a second data length, and writes the respective sets in a flash memory chip in units of second data lengths.
摘要:
A vertical-cavity surface-emitting laser (VCSEL) comprising a low-loss thin metal contact and current spreading layer within the optical cavity that provides for improved ohmic contact and lateral current distribution, a substrate including a plano-concave optical cavity, a (Ga,In,Al)N multiple quantum well (MQW) active region contained within the optical cavity that generates light when injected by an electrical current, and an integrated micromirror fabricated onto the substrate that provides for optical mode control of the light generated by the active region. A relatively simple process is used to fabricate the VCSEL.
摘要:
A storage control apparatus according to the present invention includes a plurality of connecting units connected to one or more host computers and one or more hard disk drives as storage media for storing data, one or more non-volatile storage media which are of a different type from the hard disk drives and which store data WRITE requested from the host computer, a plurality of processing units for processing WRITE and READ requests from the host computer by using the hard disk drives or the non-volatile storage media and, a plurality of memory units for storing control information to be by the processing units.
摘要:
A method of fabricating an optoelectronic device, comprising growing an active layer of the device on an oblique surface of a suitable material, wherein the oblique surface comprises a facetted surface. The present invention also discloses a method of fabricating the facetted surfaces. One fabrication process comprises growing an epitaxial layer on a suitable material, etching the epitaxial layer through a mask to form the facets having a specific crystal orientation, and depositing one or more active layers on the facets. Another method comprises growing a layer of material using a lateral overgrowth technique to produce a facetted surface, and depositing one or more active layers on the facetted surfaces. The facetted surfaces are typically semipolar planes.
摘要:
Provided is a storage system having improved access performance. The storage system includes: a hard disk drive, and a storage controller for reading/writing data from/to the hard disk drive, the storage controller including: at least one interface connected to a host computer through a network; and a plurality of processors connected to the interface through an internal network. The storage system is characterized in that: the processor provides at least one logical access port to the host computer; and the interface stores routing information including a processor which processes an access request addressed to the logical access port, extracts an address from the received access request upon reception of the access request from the host computer, specifies the processor which processes the received access request based on the routing information and the extracted address, and transfers the received access request to the specified processor.