Abstract:
The present invention discloses a high-voltage ESD protection device including a silicon controlled rectifier and a first PNP transistor. The silicon controlled rectifier includes a high-voltage P-well and N-well; a first N+ and P+ diffusion region are formed in the high-voltage P-well; a second N+ and P+ diffusion region are formed in the high-voltage N-well. The first PNP transistor comprises an N-type buried layer; a low-voltage N-well formed in the N-type buried layer; and a base, emitter and collector formed in the low-voltage N-well. The base and emitter are shorted together; the collector is shorted to the second N+ diffusion region and the second P+ diffusion region; the first N+ diffusion region is shorted to the first P+ diffusion region to act as a ground terminal. The high-voltage ESD protection device can effectively adjust the ESD trigger voltage and improve the snapback sustaining voltage after the device is switched on.
Abstract:
Disclosed are compounds based on ibuprofen, their preparation methods, uses and pharmaceutical preparation. The compounds have structures shown as formula (1), wherein, m, n are integers and fulfill the requirements of 0≦n≦6, 0≦m≦6, respectively. The preparation methods for the compounds based on ibuprofen are as follows: contacting and reacting 2-(4-isobutyl-phenyl) propionic acid to have contact reaction with a solution of an organic acid ester in the presence of a catalyst under substitution reaction conditions The present compounds can be used to prepare nonsteroidal anti-inflammatory drugs. The preparation can be preparation of fat emulsion, liposome, and dried emulsion and so on.
Abstract:
The invention discloses a novel method for trace phosphate removal from water by using a composite resin. Firstly, adjusting the pH value of the raw water to 5.0˜9.0 and prefiltering the water, then leading the filtrate through an absorption tower packed with the composite resin, the trace phosphate in the water is therefore absorbed onto the composite resin; stopping the absorption run when it reaches the leakage point, using a binary NaOH-NaCl solution as the regenerant of the exhausted sorbent, followed by rinsing the composite resin-filled absorption tower with saturated carbon dioxide solution to regenerate the resin. In this invention, a composite resin with nanosized hydrated ferric oxide (HFO) or hydrous manganese dioxide (HMO) particles loaded on its surface is adopted as the absorbent for enhanced phosphate removal from water. A significant decrease of phosphate content in the effluent from this treatment system is found from 0.05-20 ppm to less than 20 ppb (calculated in P), despite of the coexisting competing anions as sulfate, chloride, and hydrocarbonate at much higher molar concentrations than phosphate. This invention is characteristic of large treatment capacity and efficient regeneration for repeated use of the absorbent.
Abstract:
Method and apparatus for approximating the average critical area of a layout or layout region, involving summing, over all the object segments of interest, respective critical area contribution values that are dependent upon particular layout parameters of the objects, each of the contribution values being representative of a plurality of defect sizes, and being defined such that for each defect size in the plurality of defect sizes, and for a particular defect type, the contribution values collectively count all critical areas arising due to the object segments of interest only once.
Abstract:
Method and apparatus for approximating the average critical area of a layout or layout region, involving summing, over all the object segments of interest, respective critical area contribution values that are dependent upon particular layout parameters of the objects, each of the contribution values being representative of a plurality of defect sizes, and being defined such that for each defect size in the plurality of defect sizes, and for a particular defect type, the contribution values collectively count all critical areas arising due to the object segments of interest only once.
Abstract:
A diskdrive bracket mounting structure includes a bracket, a hexagonal copper column set at the bottom side of the bracket, a master cushion mounted in a mounting through hole of the bracket and sandwiched between the bracket and the hexagonal copper column, a supplementary cushion supported on the top side of the bracket around a part of the master cushion, and a P-head screw inserted through a through hole of the supplementary cushion and a through hole of the master cushion and threaded into a screw hole of the hexagonal copper column to affix the bracket to the hexagonal copper column, allowing the diskdrive bracket mounting structure to provide both the function of classis ground as well as the function of digital ground.
Abstract:
One embodiment of the present invention provides a system that predicts manufacturing yield for a die within a semiconductor wafer. During operation, the system first receives a physical layout of the die. Next, the system partitions the die into an array of tiles. The system then computes systematic variations for a quality indicative value to describe a process parameter across the array of tiles based on the physical layout of the die. Next, the system applies a random variation for the quality indicative parameter to each tile in the array of tiles. Finally, the system obtains the manufacturing yield for the die based on both the systematic variations and the random variations.
Abstract:
A convolution of the kernel over a layout in a multi-core processor system includes identifying a sector, called a dynamic band, of the layout including a plurality of evaluation points. Layout data specifying the sector of the layout is loaded in shared memory, which is shared by a plurality of processor cores. A convolution operation of the kernel and the evaluation points in the sector is executed. The convolution operation includes iteratively loading parts of the basis data set, called a stride, into space available in shared memory given the size of the layout data specifying the sector. A plurality of threads is executed concurrently using the layout data for the sector and the currently loaded part of the basis data set. The iteration for the loading basis data set proceeds through the entire data set until the convolution operation is completed.
Abstract:
Method and apparatus for approximating the average critical area of a layout or layout region, involving summing, over all the object segments of interest, respective critical area contribution values that are dependent upon particular layout parameters of the objects, each of the contribution values being representative of a plurality of defect sizes, and being defined such that for each defect size in the plurality of defect sizes, and for a particular defect type, the contribution values collectively count all critical areas arising due to the object segments of interest only once.
Abstract:
The present invention discloses a high-voltage ESD protection device including a silicon controlled rectifier and a first PNP transistor. The silicon controlled rectifier includes a high-voltage P-well and N-well; a first N+ and P+ diffusion region are formed in the high-voltage P-well; a second N+ and P+ diffusion region are formed in the high-voltage N-well. The first PNP transistor comprises an N-type buried layer; a low-voltage N-well formed in the N-type buried layer; and a base, emitter and collector formed in the low-voltage N-well. The base and emitter are shorted together; the collector is shorted to the second N+ diffusion region and the second P+ diffusion region; the first N+ diffusion region is shorted to the first P+ diffusion region to act as a ground terminal. The high-voltage ESD protection device can effectively adjust the ESD trigger voltage and improve the snapback sustaining voltage after the device is switched on.