Download or read book Semiconductor Capital Equipment written by Brett A. Hodess and published by . This book was released on 1997 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Operations Improvement in a Semiconductor Capital Equipment Manufacturing Plant written by Lohithaksha Chengappa and published by . This book was released on 2012 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: A semiconductor capital equipment manufacturing plant is a high-mix low-volume manufacturing environment where the complex products produced requires skilled manual assembly and expensive raw materials. The semiconductor capital equipment industry is sporadic with high demand variability and hence, semiconductor capital equipment manufacturers must be able to allocate resources to meet demand at minimum cost to maintain their manufacturing competitiveness. This thesis draws heavily on the research done at Varian Semiconductor Equipment, a manufacturer of ion implantation machines for the semiconductor industry, over a period of seven months as part of the Master of Engineering in Manufacturing program at the Massachusetts Institute of Technology and aims to enable Varian to make optimal resource allocation, capacity planning and personnel decisions that will allow it to meet demand at minimum cost. The goal of this thesis is achieved through the development of three optimization models, a labor flexibility framework, and an inventory management policy. The first optimization model, resource optimization for cost minimization, will allow Varian to determine the optimal combination of workers and assembly bays for each production process that will allow it to meet demand at minimum cost. The second optimization model, labor cost minimization, will enable Varian to determine the optimal combination of regular time and overtime that will allow it to meet demand at minimum labor cost. The final model, labor flexibility, will allow Varian to determine the optimal movement of workers that will allow the Varian's plant to meet demand with the minimum total cost of work hours to be provided. The final model is based on a labor flexibility framework introduced in this thesis. We also present an inventory management policy to manage certain assemblies produced at Varian's supermarket build area that will allow Varian to reduce those assemblies' safety stock levels by 30%.

Download or read book Capital Investment in Semiconductors written by and published by National Advisory Committee. This book was released on 1990 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Preserving the Vital Base written by United States. National Advisory Committee on Semiconductors and published by . This book was released on 1990 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Semiconductor Capital Equipment written by Gunnar T. Miller and published by . This book was released on 1995 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Competitive Assessment of the U S Semiconductor Manufacturing Equipment Industry written by and published by . This book was released on 1985 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Semiconductor Capital Equipment Profiles 1999 written by Jim Griffin and published by Integrated Circuit Engingeering. This book was released on 1999-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Black Book Semiconductor Capital Equipment Blind Curves Ahead written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impact of Mergers Acquisitions in Semiconductor Capital Equipment Companies in US on Their Short term Long term Financial Performance written by Gopal Shankar and published by . This book was released on 2008 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Product Life Cycle driven Supply Chain Control in Semiconductor Capital Equipment Manufacturing written by Henk A. Akkermans and published by . This book was released on 2000 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A COMPETITIVE ASSESSMENT OF THE U S SEMICONDUCTOR MANUFACTURING EQUIPMENT INDUSTRY written by and published by . This book was released on 1985 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mathematical based Approaches for the Semiconductor Capital Equipment Installation and Qualification Scheduling Problem written by Junzilan Cheng and published by . This book was released on 2015 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ramping up a semiconductor wafer fabrication facility is a challenging endeavor. One of the key components of this process is to schedule a large number of activities in installing and qualifying (Install/Qual) the capital intensive and sophisticated manufacturing equipment. Activities in the Install/Qual process share multiple types of expensive and scare resources and each activity might potentially have multiple processing options. In this dissertation, the semiconductor capital equipment Install/Qual scheduling problem is modeled as a multi-mode resource-constrained project scheduling problem (MRCPSP) with multiple special extensions. Three phases of research are carried out: the first phase studies the special problem characteristics of the Install/Qual process, including multiple activity processing options, time-varying resource availability levels, resource vacations, and activity splitting that does not allow preemption. A modified precedence tree-based branch-and-bound algorithm is proposed to solve small size academic problem instances to optimality. Heuristic-based methodologies are the main focus of phase 2. Modified priority rule-based simple heuristics and a modified random key-based genetic algorithm (RKGA) are proposed to search for Install/Qual schedules with short makespans but subject to resource constraints. Methodologies are tested on both small and large random academic problem instances and instances that are similar to the actual Install/Qual process of a major semiconductor manufacturer. In phase 3, a decision making framework is proposed to strategically plan the Install/Qual capacity ramp. Product market demand, product market price, resource consumption cost, as well as the payment of capital equipment, are considered. A modified simulated annealing (SA) algorithm-based optimization module is integrated with a Monte Carlo simulation-based simulation module to search for good capacity ramping strategies under uncertain market information. The decision making framework can be used during the Install/Qual schedule planning phase as well as the Install/Qual schedule execution phase when there is a portion of equipment that has already been installed or qualified. Computational experiments demonstrate the effectiveness of the decision making framework.

Download or read book Assembly Lead Time Reduction in a Semiconductor Capital Equipment Plant Through Improved Material Kitting written by Sonam Jain and published by . This book was released on 2014 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manufacturing operations were studied at a semiconductor capital equipment manufacturing plant, with an aim to reduce the production time of their longest lead time module. Preliminary analysis was done by observing the assembly and test operations on the production floor, and material handling operations at the warehouse. Detailed time studies were then performed on the assembly and test processes, to establish baseline measurements and to gather in-depth information on the value added and non-value added activities. It was found that 18% of the assembly activities were non-value added activities, 28% of which were related to material handling on the production floor. Based on the analysis a new kit design and kitting process were developed, which enabled parts to arrive from the warehouse in kits specific to each assembly procedure performed on the module. A method of indicating shortages was also proposed. The new design and process also facilitated Just-in-Time ordering and arrival of parts. The new kitting process was piloted, and based on two trial runs it was found that it reduced material handling time on the production floor by 70% and overall time spent on non-value added assembly operations was reduced by 20%.

Download or read book Program Management Systems for the Semiconductor Processing Capital Equipment Supply Chain written by Thomas Brian Chandler and published by . This book was released on 2004 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) the development of new manufacturing equipment such as needed in the semiconductor and other capital intensive industries.

Download or read book Assembly Lead Time Reduction in a Semiconductor Capital Equipment Plant Through Constraint Based Scheduling written by Blake William Clark Sedore and published by . This book was released on 2014 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The assembly protocols for a semiconductor capital equipment machine were analyzed for potential lead time reduction. The objective of this study was to determine the minimum assembly lead time for the machine based on the constraints of design, space, and labor availability. An assembly requires the completion of a set of procedures that each contains assembly tasks. Precedence relationships between tasks indicate for each procedure what other tasks must be completed before it can start. Each procedure was assumed to have constant resource requirements throughout its duration. The Critical Path Method (CPM) was used to identify 13 procedures on the critical path, based on design and space constraints. A preliminary build schedule was developed that prioritized critical path procedures. A trial of this build schedule achieved an assembly lead time of 39 hours, resulting in a 70% reduction from the current average of 5.5 days. This trial was also accomplished with 76% of the average labor hours for assembly. A production build schedule with a lead time of 43 hours was developed based on the trial results. This schedule allows for production rates of up to 5 machines per week to be achieved with the current shift structure of the company, without the incurrence of overtime. A critical path drag analysis identified critical procedures with the highest potential for lead time reduction. The highest drag of a critical path item was 260 minutes, accounting for 10% of the assembly lead time.

Download or read book Capital Investment in Semiconductors written by and published by National Advisory Committee. This book was released on 1990 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Production Lead Time Reduction in a Semiconductor Capital Equipment Manufacturing Plant Through Optimized Testing Protocols written by Anubha Singh Bhadauria and published by . This book was released on 2014 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Processes at a semiconductor equipment manufacturing facility were studied with the goal to reduce the production lead time. Based on the principles of lean manufacturing, DMAIC methodology was used to guide the process. Value Stream Mapping (VSM) of the whole process was done to determine that the Universal End Station (UES) was the module with the longest lead time. This work focuses on the optimization of the testing process on the UES. Time studies were conducted for the assembly and test of the UES module and analysis of results revealed a testing process that is serial and thus of a very long duration. Further investigations revealed that some of the processes required the test technician to do manual calibrations and measurements which resulted in long test times. Based on the interviews with involved personnel, historical data analysis and the research carried out, specific tests were recommended for automated testing and parallel testing. A decision tree was developed to help aid in the selection of the suitable candidates for automation while a dependency network diagram was developed to aid in selection of candidates for parallel testing. It is projected that these recommendations will reduce the Testing lead time of UES by 8.4% and labor hours by 16.3%. Keywords: Lean manufacturing, semiconductor, optimization, bottle neck, lead time, DMAIC, Value Stream Mapping, Time study, Root cause analysis.