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대면적 박막 태양전지 적용을 위한 CdTe 박막의 화학적기계적연마 공정 특성
양정태(Jung Tae Yang),신상헌(Sang-Hun Shin),이우선(Woo-Sun Lee) 대한전기학회 2009 전기학회논문지 Vol.58 No.6
Cadmium telluride (CdTe) is one of the most attractive photovoltaic materials due to its low cost, high efficiency and stable performance in physical, optical and electronic properties. Few researches on the influences of uniform surface on the photovoltaic characteristics in large-area CdTe solar cell were not reported. As the preceding study of the effects of thickness-uniformity on the photovoltaic characteristics for the large-area CdTe thin film solar cell, chemical mechanical polishing (CMP) process was investigated for an enhancement of thickness-uniformity. Removal rate of CdTe thin film was 3160 ㎚/min of the maximum value at the 200 gf/㎠ of down force (pressure) and 60 rpm of table speed (velocity). The removal rate of CdTe thin film was more affected by the down force than the table speed which is the two main factors directly influencing on the removal rate in CMP process. RMS roughness and peak-to-valley roughness of CdTe thin film after CMP process were improved to 96.68% and 85.55%, respectively. The optimum process condition was estimated by 100 gf/㎠ of down force and 60 rpm of table speed with the consideration of good removal uniformity about 5.0% as well as excellent surface roughness for the large-area CdTe solar cell.
양정태(Jung-Tae Yang),정수진(Soo-Jin Jeong),박경우(Kyoung-Woo Park),곽호택(Ho-Taek Kwak) 한국자동차공학회 2022 한국자동차공학회 지부 학술대회 논문집 Vol.2022 No.5
Every manufacturing company is facing trends & challenges from their operating market. On average all KPIs & Initiatives are built on Delivery, Cost, Safety & Quality. In that regard, companies try to meet customer expectations and defined product requirements by using a baseline of CAD/ DMU & Process Planning tools and relying on Simulation, Expert Opinion & Physical Prototypes. But due to financial, timing, or other restrictions, there is still a high remaining risk and inefficiencies in achieving Product, Production, or Maintenance targets. Virtual Reality helps Product, Manufacturing, and Service Engineering Managers address challenges related to shorter product lifecycles, globalization, and new technology trends; better managing the risk of not achieving their targets; through a virtual and rich-context Human Centric Product & Processes validation, facilitating early identification of issues and improvements while reducing the need for physical trials & rely only on expert opinions. Note, Virtual Reality is not targeting to replace the baseline CAD, DMU, or Process Planning solutions that users are using. Neither are Virtual Reality aiming to be a complete replacement for the existing simulation solutions in place. Instead, Virtual Reality is intended to help users to reduce key risks and inefficiencies from the entire development process.