scholarly journals Ergonomics in Semiconductor Wafer Manufacturing

2013 ◽  
Vol 10 ◽  
pp. 231-235
Author(s):  
Wai Yi Foong ◽  
Amir Hamzah bin Hassan
Keyword(s):  
Preventive Maintenance ◽  
Material Handling ◽  
Automated Guided Vehicle ◽  
Lot Size ◽  
Semiconductor Wafer ◽  
Manual Material Handling ◽  
The Impact ◽  
Wafer Manufacturing

In semiconductor wafer manufacturing, there are only a few processes but many steps. Each wafer must go through the processes multiple times (steps) and sometimes not in the same sequence. All the wafers in lot size of 25 pieces are transferred between the processes using an Automated Guided Vehicle from stocker to stocker. Then, the wafers are manually transferred to the processing tool. Although the tools are designed per SEMI S2/S8 standards [1,, the equipment technician can get into awkward postures when performing the preventive maintenance. Both the manual material handling between the tools and awkward postures during preventive maintenance can pose an ergonomic challenge. However, some techniques can be used to minimize the impact. This paper shares the techniques which can ease ergonomic problems in semiconductor wafer manufacturing

Usulan Perbaikan Sistem Kerja Di Area Gudang Menggunakan Metode Rula Dan Owas Di Proyek Pembangunan Jalan Tol Cisumdawu Phase 2 PT Wijaya Karya (Persero) Tbk

2021 ◽  
Vol 4 (2) ◽  
pp. 78
Author(s):  
Deny Setiawan ◽  
Zeni Fatimah Hunusalela ◽  
Rina Nurhidayati
Keyword(s):  
Musculoskeletal Disorders ◽  
Material Handling ◽  
Development Project ◽  
Phase 2 ◽  
Toll Road ◽  
Manual Material Handling ◽  
Level 3 ◽  
Body Map ◽  
The Impact ◽  
Action Levels

The purpose of this study is to recommend a proposed tool to reduce the impact caused by the manual material handling activities in the warehouse section of the Cisumdawu Toll Road Development Project 2. The study used the Nordic Body Map questionnaire with 9 respondents. The method used in this research is RULA and OWAS with the help of ErgoFellow software. Based on the results of the RULA calculation, the process of taking empty jerry cans obtained a score of 6 action levels 3. In the process of filling the fuel obtained a score of 4 action levels 2. In the process of removing or lifting jerry cans that were filled with BBM obtained a score of 7 action level 4. For the OWAS calculation, the taking process empty jerry can get the results of category 2. In the process of filling the fuel obtained measurement results in category 1. In the process of removal or removal of jerry cans that have been filled with fuel obtained category 4. The work process with a high score and risk of musculoskeletal disorders and action needs to be taken ie the removal of the jerry can which has been filled with BBM. For this reason, it is necessary to propose the design of material handling aids in the form of jib cranes using Indonesian anthropometry data  to fit the posture of Indonesians.Tujuan penelitian ini untuk merekomendasikan usulan alat bantu untuk mengurangi dampak yang disebabkan aktivitas manual material handling dibagian gudang Proyek Pembangunan Jalan Tol Cisumdawu phase 2. Penelitian menggunakan kuisioner Nordic Body Map dengan jumlah responden 9 orang. Metode yang digunakan dalam penelitian ini yaitu RULA dan OWAS dengan bantuan software ErgoFellow. Berdasarkan hasil perhitungan RULA, proses mengambil jeriken kosong diperoleh score 6 action level 3. Pada proses pengisian BBM diperoleh score 4 action level 2. Pada proses pemindahan atau pengangkatan jeriken yang sudah diisi BBM diperoleh score 7 action level 4. Untuk perhitungan di OWAS, proses pengambilan jeriken kosong diperoleh hasil kategori 2. Pada proses pengisian BBM diperoleh hasil pengukuran kategori 1. Pada proses pemindahan atau pengangkatan jeriken yang sudah diisi BBM diperoleh kategori 4. Proses kerja dengan score dan resiko terjadinya musculoskeletal disorders yang tinggi serta perlu dilakukan tindakan yaitu proses pengangkatan jeriken yang sudah terisi BBM. Untuk itu diperlukan usulan rancangan alat bantu material handling berupa jib crane menggunakan data anthropometri Indonesia agar sesuai dengan postur tubuh orang Indonesia.

scholarly journals Flexibility analysis of inventory cost model with ergonomics

2019 ◽  
Vol 4 (1) ◽  
pp. 166-173
Author(s):  
Sezen Korkulu ◽  
Krisztina Bona
Keyword(s):  
Material Handling ◽  
Cost Model ◽  
Unit Weight ◽  
Social Aspect ◽  
Lot Size ◽  
Inventory Cost ◽  
Total Cost ◽  
Eoq Model ◽  
Manual Material Handling ◽  
Parameter Values

The economic and environmental sustainability issues in supply chain management have integrated by many researchers in the past decades. The ergonomics as a social aspect of sustainability had received a little attention by researchers. Therefore, the aim of the paper is analyzing the flexibility of developed inventory cost model with relaxation allowance and endurance time as a social aspect of sustainability. The effects of distance, unit weight of item and total number of items on relaxation allowance, the total cost of logistics operation and the EOQ model were investigated. The analyzed mathematical model was a single operator-single material model which covered transportation of fixed amount of raw materials from storage plant to production plant by manual material handling with simple cart and picking, storing, pushing and pushing back with empty cart for manual handling of the products. The different parameter values applied for analysis such as total amount of handled items (Q) changes between 500 pcs to 2750 pcs, unit weight of item (w) changes between 0.1 kg to 1 kg, distance of movement by manual material handling for picking and storing motions (d1) changes between 2 m to 3 m and the distance between the storing equipment and the supermarket of the production line for pushing motion (d2) changes between 15 m to 20 m. The results of the analysis indicated that the longer the distance of movement for all motions leads to decrease in savings of the model compared to EOQ model. The increase in unit weight of item is increase the savings obtained from application of our model and decrease the optimal lot size. There was no specific change on savings or optimal lot size as the total amount of handled item is increase. The compared results indicated that an increase in d1 and d2 lead to an increase in optimal lot size and increase in total cost of the model. Consequently, the analysis has shown that a decrease in lot size would be the better way to improve both ergonomic conditions and total cost of production in any different parameter values. Finally, the analysis of the inventory model with ergonomics were proved that this model is suitable for different industrial practices.

Free Vibration Analysis for Thin Wire of Modern Wiresaw Between Sliced Wafers in Wafer Manufacturing Processes

2000 ◽  
Author(s):  
Songbin Wei ◽  
Imin Kao
Keyword(s):  
High Speed ◽  
Free Vibration Analysis ◽  
Equation Of Motion ◽  
Manufacturing Processes ◽  
Thin Wire ◽  
Wire Vibration ◽  
The Wire ◽  
The Impact ◽  
Wafer Manufacturing ◽  
Impact Problem

Abstract In wiresaw manufacturing process where thin wire moving at high speed is pushed onto ingot to produce slices of wafer, the wire is constrained by two wafer walls as it slices into the ingot. In this paper, we investigate the vibration of such wire under the constraints of wafer walls. To address this problem, the model for wire vibration with impact to wafer walls is developed. The equation of motion is discretized using the Galerkin’s method. The principle of impulse and momentum is utilized to solve the impact problem. The results of analysis and simulation indicate that the response under a pointwise sinusoidal excitation is neither periodical nor symmetric with respect to the horizontal axis, due to the excitation from the impact. The wire vibration behavior is affected dramatically by the wafer wall constraints.

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