Abstract:
A new method and device to encapsulate integrated circuits such as flip chips and BGA packages. A special mold (31) to surround the chip (32) to be encapsulated in a cavity (43), and the encapsulant (41) is injected into the cavity at an elevated pressure, and possibly at an elevated temperature. This shortens the cavity filling time by two or three orders of magnitude, compared to the conventional dispensing process. The reliability of the package is increased by increasing the adhesion of encapsulant to the package, by controlling fillet shape (51) through in-mold curing, and by completely filling the cavity through proper mold design and, optionally, evacuation of the cavity prior to injection. The invention also allows the use of a wider range of encapsulants, including highly viscous material, fast curing materials and reworkable materials.
Abstract:
Disclosed are the Hmp class of polypeptides, DNA sequences encoding those polypeptides, and uses thereof, particularly in methods and kits for mismatch (for example, mutation) detection.
Abstract:
The present invention is directed to a method of producing a cereal plant cell or protoplast useful for regeneration of a water stress or salt stress tolerant cereal plant by transforming the cereal plant cell or protoplast with a nucleic acid encoding a late embryogenesis abundant protein. A transgenic cereal plant or cereal plant cell or protoplast transformed with a nucleic acid encoding a late embryogenesis abundant protein is also provided. An LEA protein gene, HVA1, from barley (Hordeum vulgare L.) was transformed into rice (Oryza sativa L.) plants. The resulting transgenic rice plants accumulate the HVA1 protein in both leaves and roots. Transgenic rice plants showed significantly increased tolerance to water stress (drought) and salt stress.
Abstract:
The invention presents a non-metallic laminated composite reinforcing rod for use in reinforced or prestressed concrete. The rod is made by creating a sheet of core material (1) comprising a number of layers of "pre-preg" material. Ribs (2) are formed on top of the core from additional layers of pre-preg material laid with the fibers transverse to those in the core. The ribs (2) are then covered by additional layers of pre-preg (3) laid with fibers parallel to the core fibers. The material is heated to fuse the layers. Finally, the sheets of laminated reinforcement are cut parallel to the core fibers to the width desired. The resulting reinforcing rod (62) is superior to steel in corrosion resistance, flexibility, durability, and strength. The reinforcing rod (62) may be used as a prestressing tendon in prestressed concrete after encasing the ends of the rod in an attachment formed of a sleeve (60) filled with grouting material (63) such as mortar or epoxy. The glass-fiber embodiment is non-conductive. If carbon pre-preg made of high modulus fibers is used, then the Young modulus of the LCRs is approximately equal to that of steel.
Abstract:
Grating-coupled surface emitting laser structures (10) utilize strain-compensated multiple quantum wells (18) as the laser gain with a very high grating coupling efficiency to reduce output beam spot size and overall device size. The lasers are designed with grating coupling coefficients that are much higher ( > 150/cm) than those employed in conventional grating-coupled lasers to increase the laser energy coupled vertically through the top surface of the laser. This permits a reduced output beam size that is easily matched to an optical fiber. The use of the high coupling coefficient is made possible because the increased optical gain of the strain-compensated multiple quantum well (18) offsets the increased losses that are induced in the horizontal laser cavity (15) by increased grating coupling efficiency.
Abstract:
A method for the treatment of fibroproliferative disorders is disclosed in which an effective dose of hydroxypyridone compounds is applied topically or systemically.
Abstract:
An in vitro method for the detection of human immunodeficiency virus (HIV) in patient samples employing oxidative agents capable of augmenting viral expression is disclosed. Patient cells are prepared and an oxidative agent is added to the culture medium to induce HIV expression. The levels of intracellular and extracellular p24 are measured using conventional immunological assays. The number of HIV-infected patient cells can be quantitatively determined using the appropriate standards and controls.
Abstract:
A panel display (10) includes a common substrate (56) on which a plurality of small display tiles (12, 13, 14, 15) are mounted in an array and electrically interconnected to replicate a large area panel. Each tile includes a plurality of contact pads (44, 46, 52) which are aligned with corresponding contact pads (72, 74, 78) on the substrate. Solder joints (60, 62, 68) between corresponding contact pads mechanically align and secure the tiles on the substrate, and provide electrical connections therebetween. Selected substrate pads (80, 81) are interconnected to provide electrical connections between adjacent tiles (14, 15).
Abstract:
Semiconductor lasers (10) utilize strain-compensated multiple quantum wells (20) to increase gain in long wavelength (1.3 and 1.5 microns) devices. The strain-compensated quantum well structures (18) contain a plurality of strained well (20) and barrier (22) layers, where the barrier layers (22) are placed under a strain equal and opposite to that of the well layers (20). As a result, the normal thickness restriction on strained layers is lifted. In addition, the well layers are p-doped to further increase optical gain. Another embodiment uses strain-compensated multiple quantum wells in a grating-coupled laser (100 and 120). Because of the increased gain of the strain-compensated quantum well structure, the grating can made on the surface of the laser with a strong light coupling characteristic, allowing simpler fabrication and shorter length of the laser.