|
Position is given to the four consecutive PVP mount board, was light, and then use proven testing optical CMM for position to evaluate the placement machine performance. Although this method can not be used to predict the quality of products, but the maximum level of elimination of the equipment, products, processes and the impact of operational differences, the objective performance results reflect the placement of equipment. In order to obtain reliable results, the need for large amounts of data measurement, which requires a very fast test system test speed. PVP panel array element set (a sheet of a group) as shown in Table 1. At present, its high-speed automated optical CMM measurements have been widely praised. However, the second DD Form 1PVP third-hand panel of eight elements arranged in groups (a board of a group) serial number of components lQFP a 100362QFP a 208303BGA a 228l004S0ICl68051608C (capacitor) 400 and, CMM must have high stability, high strength rigid structure and precise positioning and high-quality images and is extremely sensitive to environmental conditions, can not be made portable, leading to expensive and inflexible CMM. Optical CMM for IPC9850 alternative standard testing equipment CmController has been successfully developed. 6 results of data processing equipment on the placement of data reliability assessment of a large number of statistical error, IPC9850 standard error of the data assuming a normal distribution (Gauss theorem), but does not rule out the distribution of other forms of data. The process according to the given limit, can be calculated as equipment capacity and process capability index C index value of C: C = (to a ceiling of a given lower limit) / 6, where S is the sample standard deviation, the same below. C. = C. (BU, where K = (SE Arts Target process average) / [(given a given threshold limit) / 2]. C argument that placement machine in a stable state (equipment, devices, substrates, processes,tory burch, etc.) , the actual processing capacity. C. parameter values and device placement equipment tolerance values (× 10) and the quality of correspondence between the mouth of confidence shown in Table 2, Table 2.. and the number of devices mounted over the relationship between poor Cpk quality of confidence-tolerance devices mount the number of O / ppm1.003.00O27001.334.00O631.634.89Ol2.006.00O0.00l97 conclusion as the surface mount placement machine key equipment, products from different manufacturers and price performance quite different. Users should be how to evaluate and select placement machine? This paper systematically discusses the problem of placement machine performance testing. through the industry standard surface mount equipment IPC9850 comprehensive explanation to help the industry understand the application of this standard,MBT Schuhe, improve the equipment assessment, selection, maintenance, adjustment and T process analysis capabilities. References: [1] IPC a 9850SurfaceMountEquipmentCharacterization, AssemblyEquipmentSub-Committee (5-4I), 2001. [2] Dou Jia Hua. IPC9850 surface mount device performance on the detection method answers to some of the issues [J]. Surface mount technology, 2003, l :32-34. [3] http://www.selp.com.cn/untitled/IPC9850.htm. (on the next page 6) QuadMux flow control products in the device has four independent ports, which provides high performance traffic management functions; can provide multiple, branching or broadcast function, the total bandwidth of up to 16Gbps, too bits for routers and switches, base stations, routing systems,mac makeup, data acquisition and imaging needs of a variety of data collection and data flow path of the application of parallel buffers for the vigorous development of China's telecommunications industry provides an ideal solution. IDT in the latest two series of Chinese products in the market capacity, Mr. Zhang Wei said that the new device family will IDT2003 fiscal year August2003SAM added $ 150,ecco shoes outlet,000,uggs nederland,000. IDT attaches great importance to product development, only identify the market direction, continuous innovation to help customers achieve their own custom solutions, providing a competitive solution that is, in technology, service and price that has advanced, and thus shorten time to market and maximize the value of their products, enterprises can be times in the leading position. Mr. Zhang Wei said the Chinese market, China attaches great importance to IDT, to develop applications to meet the needs of Chinese customers of products to enhance the competitiveness of the company. SemiconductorTechnologyVo1.28No.817 one.; manure
|
评论