摘要:
A GaN based three layer buffer on a sapphire substrate provides a template for growth of a high quality I GaN layer as a substitute substrate for growth of a Nitride based LED.
摘要:
A GaN based three layer buffer structure disposed on a substrate, and having a GaN layer disposed on the three layer buffer structure, the GaN layer serving as a platform for growth of a light emitting structure thereon.
摘要:
A semi-conductor light emitting diode includes closely spaced n and p electrodes formed on the same side of a substrate to form an LED with a small foot-print. A semi-transparent U shaped p contact layer is formed along three sides of the top surface of the underlying window layer. The p electrode is formed on the p contact layer centered on the closed end of the U shaped layer. An n contact layer is formed on an n cladding layer and centered in the open end of the U of the p contact layer. The n electrode is formed on the n contact layer. The n and p electrodes are electrically isolated from one another by either a trench or an insulator, situated between the electrodes.
摘要:
P-type layers of a GaN based light-emitting device are optimized for formation of Ohmic contact with metal. In a first embodiment, a p-type GaN transition layer with a resistivity greater than or equal to about 7 Ω cm is formed between a p-type conductivity layer and a metal contact. In a second embodiment, the p-type transition layer is any III-V semiconductor. In a third embodiment, the p-type transition layer is a superlattice. In a fourth embodiment, a single p-type layer of varying composition and varying concentration of dopant is formed.
摘要:
An epitaxial material grown laterally in a trench allows for the fabrication of a trench-based semiconductor material that is substantially low in dislocation density. Initiating the growth from a sidewall of a trench minimizes the density of dislocations present in the lattice growth template, which minimizes the dislocation density in the regrown material. Also, by allowing the regrowth to fill and overflow the trench, the low dislocation density material can cover the entire surface of the substrate upon which the low dislocation density material is grown. Furthermore, with successive iterations of the trench growth procedure, higher quality material can be obtained. Devices that require a stable, high quality epitaxial material can then be fabricated from the low dislocation density material.
摘要:
P-type layers of a GaN based light-emitting device are optimized for formation of Ohmic contact with metal. In a first embodiment, a p-type GaN transition layer with a resistivity greater than or equal to about 7 Ωcm is formed between a p-type conductivity layer and a metal contact. In a second embodiment, the p-type transition layer is any III-V semiconductor. In a third embodiment, the p-type transition layer is a superlattice. In a fourth embodiment, a single p-type layer of varying composition and varying concentration of dopant is formed.
摘要:
A method for improving the operating stability of compound semiconductor minority carrier devices and the devices created using this method are described. The method describes intentional introduction of impurities into the layers adjacent to the active region, which impurities act as a barrier to the degradation process, particularly undesired defect formation and propagation. A preferred embodiment of the present invention uses O doping of III-V optoelectronic devices during an epitaxial growth process to improve the operating reliability of the devices.
摘要:
In the present invention, an interfacial layer is added to a light-emitting diode or laser diode structure to perform the role of strain engineering and impurity gettering. A layer of GaN or AlxInyGa1−x−yN (0≦x≦1, 0≦y≦1) doped with Mg, Zn, Cd can be used for this layer. Alternatively, when using AlxInyGa1−x−yN (x>0), the layer may be undoped. The interfacial layer is deposited directly on top of the buffer layer prior to the growth of the n-type (GaN:Si) layer and the remainder of the device structure. The thickness of the interface layer varies from 0.01-10.0 &mgr;m.
摘要翻译:在本发明中,将界面层添加到发光二极管或激光二极管结构中以起到应变工程和杂质吸杂的作用。 可以使用掺杂有Mg,Zn,Cd的GaN或Al x In y Ga 1-x-y N(0 <= x <= 1,0 <= y <= 1)层。 或者,当使用Al x In y Ga 1-x-y N(x> 0)时,该层可以是未掺杂的。 在n型(GaN:Si)层和器件结构的其余部分生长之前,界面层直接沉积在缓冲层的顶部上。 界面层的厚度从0.01-10.0μm变化。
摘要:
In the present invention, an interfacial layer is added to a light-emitting diode or laser diode structure to perform the role of strain engineering and impurity gettering. A layer of GaN or AlxInyGal1-x-yN (0≦x≦1, 0≦y≦1) doped with Mg, Zn, Cd can be used for this layer. Alternatively, when using AlxInyGa1-x-yN (x>0), the layer may be undoped. The interfacial layer is deposited directly on top of the buffer layer prior to the growth of the n-type (GaN:Si) layer and the remainder of the device structure. The thickness of the interfacial layer varies from 0.01-10.0 &mgr;m.
摘要翻译:在本发明中,将界面层添加到发光二极管或激光二极管结构中以起到应变工程和杂质吸杂的作用。 可以使用掺杂有Mg,Zn,Cd的GaN或Al x In y Ga 1-x-y N(0 <= x <= 1,0 <= y <= 1)的层。 或者,当使用Al x In y Ga 1-x-y N(x> 0)时,该层可以是未掺杂的。 在n型(GaN:Si)层和器件结构的其余部分生长之前,界面层直接沉积在缓冲层的顶部上。 界面层的厚度从0.01-10.0μm变化。
摘要:
A method and apparatus for resisting malicious code in a computing device. A software component corresponding to an operating system kernel is analyzed prior to executing the software component to detect the presence of one or more specific instructions such as malicious code, a change in mode permissions or instructions to modify or turn off security monitoring software, and taking a graduated action in response to the detection of one or more specific instructions. The graduated action taken is specified by a security policy (or policies) stored on the computing device. The analyzing may include off-line scanning of a particular code or portion of code for certain instructions, op codes, or patterns, and includes scanning in real-time as the kernel or kernel module is loading while the code being scanned is not yet executing (i.e., it is not yet “on-line”). Analysis of other code proceeds according to policies.