[논문]인쇄회로기판 제조 공정에서 위험성평가와 안전조치 적용 사례 연구

이영만; 이인석

doi:10.14346/jkosos.2022.37.4.120

인쇄회로기판 제조 공정에서 위험성평가와 안전조치 적용 사례 연구
A Case Study of Risk Assessments and Safety Measures in a PCB Manufacturing Process 원문보기

한국안전학회지 = Journal of the Korean Society of Safety, v.37 no.4, 2022년, pp.120 - 128

이영만 (한경대학교 토목안전환경공학과) , 이인석 (한경대학교 사회안전시스템공학부(안전공학전공))

Abstract ▼ AI-Helper

Printed circuit boards (PCBs) are a basic component in the electronics industry and are widely used in nearly all electronic products, such as mobile phones, tablet computers, and digital cameras, as well as in electric equipment. PCB manufacturing involves the use of many chemicals and chemical processes and therefore has more risks than other manufacturing sectors. This study aims to identify the causes of possible accidents during PCB manufacturing through risk assessment, develop and implement safety measures, and evaluate the effectiveness of these measures. Note that the safety measures developed to mitigate the risks of a certain process were also implemented for other similar processes. The risk assessments conducted over seven years, from 2015 to 2021, at a PCB manufacturing company identified 361 hazardous processes. Between 2016 and 2019, 41-56 hazardous processes were identified per year; such processes decreased to fewer than 20 per year after 2020. Application of the risk assessment results to the improvement of the hazardous processes with the similar characteristics seems to be effective in decreasing the risks. Equipment-related factors such as lack of appropriate maintenance, low work standards, and defective protection devices were responsible for 59.8% of all possible accidents. Because PCB manufacturing involves many chemicals, skin contact with hazardous substances, electric shock, fire, and explosion were the most common types of possible accidents (81.7%). In total, 505 safety measures were implemented, including 157 related to purchase and improvement of equipment and devices for safety (31.1%), 147 related to the installation/modification of fire prevention facilities (29.1%), and 69 related to the use of standard electrical appliances (13.7%). Risk assessment conducted after implementing the safety measures showed that these measures significantly decreased risk; 247 processes (68.4%) had a risk level of 3, corresponding to "very low," and 114 processes (31.6%) showed a risk level of 4, corresponding to "low." In particular, risk assessment of 104 processes with risk scores of 12 and 10 other processes with risk score of 16 showed that the risk decreased to 4 after implementing the safety measures. Thus, implementing these measures in similar manufacturing sectors that involve chemical processes can mitigate risk.

주제어

표/그림 (16)

표 Table 1. Number of occupational injuries according to the types of accidents occurred in Korea in 2019 and 2020
그림 Fig. 1. Process of risk assessment.
표 Table 2. Risk assessment matrix by frequency and severity of related injuries
표 Table 3. Classification of risk levels
표 Table 4. Number of processes for applying risk assessments
표 Table 5. Numbers of the risks classified by risk factors and type of accidents (%)
표 Table 6. Numbers of the risks classified by risk factors and safety measures (%)
표 Table 7. Results of risk assessments before and after applying safety measures
그림 Fig. 2. A case of safety measure : Display for chemical flows.
그림 Fig. 3. A case of safety measure : Emergency stairs outside the building.
그림 Fig. 4. A case of safety measure : Additional sensors for detecting leak of chemicals.
그림 Fig. 5. A case of safety measure : Additional automatic system for extinguishing fires.
그림 Fig. 6. A case of safety measure : interlocking fire walls.
그림 Fig. 7. A case of safety measure : Gas detecting sensors.
그림 Fig. 8. A case of safety measure : Modification of the system of supplying chemicals.
그림 Fig. 9. A case of safety measure : Applying dikes in the links of pipes for chemicals.

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