共查询到18条相似文献,搜索用时 62 毫秒
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半导体制造业中产品种类繁多,工序复杂,对设备的利用率要求较高,因而相对于其它制造也来说,生产计划的优化也较为复杂。本文讨论了目前半导体行业中常用的启发算法和基于线性规划的优化方法。 相似文献
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杜海文 《中国电子科学研究院学报》2006,1(2):202-205
通过介绍目前半导体与集成电路生产设备的技术情况,分析了该行业的特点和面临的国外封锁和压力,并且从设备数字制造技术的应用背景以及目前起到的巨大作用,对我国该行业的数字技术应用提出了看法。 相似文献
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《电子工业专用设备》2006,35(1):22-22
经济部工业局表示,台湾地区半导体产业发展至今,不仅产业结构己相当完整,展现的成绩也让国际瞩目。2005年总产值将再创新高,达到1.1131兆亿元。在政府致力推动“晶片系统国家型科技计画”下,预期2006年台湾地区封测业资本支出将提高,此外,随着厂商积极的投入,预估至2008年,台湾将可望拥有超过15座以上的Ф300mm厂晶圆厂, 相似文献
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半导体晶圆制造中的设备效率和设备能力 总被引:2,自引:1,他引:1
在半导体制造车间中,设备是非常昂贵的,设备折旧与维修占生产成本组成的最大比重,设备利用率的提高显得尤为重要,因此设备效率和设备能力已成为半导体制造者最关心的问题之一.本文针对该问题,系统地介绍了半导体晶圆制造中设备效率和设备能力的衡量标准及其数据收集,以期达到提高设备利用率的目的. 相似文献
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Capacity Planning of Survivable Mesh-based Transport Networks under Demand Uncertainty 总被引:1,自引:0,他引:1
Almost all existing work on the design of survivable networks is based on a specific demand forecast to which one optimizes routing and transport capacity assignment for a single target planning view. In practice these single-forecast models may be used repetitively by a planner to consider a range of different scenarios individually, hoping to develop intuition about how to proceed. But this is not the same as having a planning method that can inherently and quantitatively consider a range of possible futures all at once. Our approach considers both the cost of initial design construction and the expected cost of possible augmentations or “recourse” actions required in the future, adapting the network to accommodate different actual future demands. In practice, these recourse actions might include lighting up a new DWDM channel on an existing fiber or pulling-in additional cables, or leasing additional capacity from third party network operators, and so on. A stochastic linear programming approach is used to achieve designs for which the total cost of current outlays plus the expected future recourse costs is minimized. Realistic aspects of optical networking such as network survivability based on shared spare capacity and the modularity and economy-of-scale effects are considered. These are not only important practical details to reflect in planning, but they give the “future-proof” design problem for such networks some unique aspects. For instance, what is the working capacity under one future scenario that may not waste capacity if that demand scenario does not materialize, because the same channels may be used as shared spare capacity under other future scenarios. Similarly economy-of-scale effects bear uniquely on the future-proof planning problem, as the least-cost strategy on a life-cycle basis may actually be to place more capacity today than current requirements would suggest. This is of obvious relevance to planners given the recent hard times in the telecommunications industry, causing a tendency to minimize costs now regardless of the consequences. 相似文献
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半导体制造系统的回流、资源高度共享等特征使得仅采用ERP系统已无法满足对生产规划与排程的种种需求.高级规划与排程(APS)系统的出现是为了强化ERP中以传统MRP规划逻辑为主的生产规划与排程功能,以协助规划人员对物料与产能做同步且最有效益的生产规划.APS系统利用先进的信息科技及规划技术,再考虑企业资源限制条件与生产现场的控制与派工法则,规划可行的物料需求计划与生产排程计划,具有同步规划、即时规划、最优规划等特点.对APS功能特色、APS导入时与ERP的衔接问题以及导入后各部门的运作进行了介绍及分析. 相似文献
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简述了半导体器件发展历程,及其对人类社会发展所产生的深刻影响。探讨了半导体器件所取得的最新研究成果以及它今天面临的挑战及未来发展趋势。最后阐述了世界半导体产业重心的转移及其给中国半导体产业发展带来的机遇与挑战。 相似文献
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网络备用容量优化的一种数学模型 总被引:1,自引:0,他引:1
本文研究了SDH通信网的保护问题。当故障发生时,必须找到一些路由用于建立足够的恢复通道。同时,在建立一个通信网络时,希望在满足一定保护要求的前提下使用最少的备用资源。解决这个问题的这一步是提出一个数学模型。这也是最困难和最重要的一步。一旦建立了一个数学模型,我们就可以用某种数学上的算法来解决它了。 相似文献
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在研发一套基于0.18μm工艺的全新半导体芯片时,由于芯片工艺的要求我们将标准0.18μm工艺流程中的接触孔蚀刻阻挡层由原来的UVSIN+SION改为SIN,但却引进了PID(等离子体损伤)的问题。当芯片的关键尺寸减小到0.18μm时,栅氧化层变得更薄,对等离子体的损伤也变得更加敏感。所以如何改善PID也成为这款芯片能否成功量产的重要攻坚对象。这一失效来源于接触孔阻挡层的改变,于是将改善PID的重点放在接触孔蚀刻阻挡层之后即后段工艺上。后段的通孔蚀刻及钝化层的高密度等离子体淀积会产生较严重的等离子体损伤,因此如何改善这两步工艺以减少等离子体损伤便成为重中之重。文中通过实验验证了关闭通孔过蚀刻中的磁场以及减小钝化层的高密度等离子体淀积中的溅射刻蚀功率可以有效改善芯片的等离子体损伤。通过这两处的工艺优化,使得PID处于可控范围内,保证了量产的芯片质量。 相似文献
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In this paper, we consider a capacity allocation problem arising in the context of deploying asynchronous transfer mode (ATM) networks. Given types of ATM switches, the problem is to find an optimal allocation of capacity such that the total cost of installed switch modules is minimized, while satisfying all traffic demands. We formulate the problem as an integer programming model, which can be conceptualized as a generalized bin packing problem with capacity constraints. We then develop a surrogate constraint technique of the formulation for enhancing the representation of the model. Guided by the tight lower bound of the surrogate relaxation, we devise an effective tabu search heuristic that provides good quality solutions with guaranteed optimality. We present promising computational results that show the viability of the proposed heuristic and lower bounding methods, and that provide insights into implementation for configuring ATM switch in practice. 相似文献