• Transactions on Electrical and Electronic Materials
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• v.4 no.3
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• pp.5-9
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• 2003

In this paper, a layout-based CMOS RF model for RFIC's including the capacitance effect, the skin effect, and the proximity effect between metal lines on the Si surface is proposed for the first time for accurately predicting the RF behavior of CMOS devices. With these RF effects, the RF equivalent circuit model based on the layout of the multi-finger gate transistor is presented. The capacitances between metal lines on the Si surface are modeled with the layout. And the skin effect is modeled to the equivalent ladder circuit of metal line. The proximity effect is modeled by adding the mutual inductance between cross-coupled inductances in the ladder circuit representation. Compared to the BSIM 3v3 and other models, the proposed RF model shows better agreements with the measured data and shows well the frequency dependent behavior of devices in GHz ranges.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.40 no.8
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• pp.555-559
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• 2003

In this paper, a new CMOS RF model for RF IC design including the capacitance effect, the skin effect, and the proximity effect between metal lines on the Si surface is proposed for tile first time for accurately predicting the RF behavior of CMOS devices. The capacitances between metal lines on the Si surface are modeled with the layout. And the skin effect is modeled with a parallel branch added in equivalent circuit of metal line. The proximity effect is modeled by adding the mutual inductance between cross-coupled inductances in the ladder circuit representation. Compared to the BSIM 3v3. the proposed RF model shows good agreements with the measured data and shows well the frequency dependent behavior of devices in GHz ranges.

• Journal of the Institute of Electronics and Information Engineers
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• v.49 no.12
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• pp.234-241
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• 2012

This paper proposes a novel design methodology considering transistor layout variation. The proposed design technique is to improve the transistor's electrical characteristics without performing a circuit simulation to extract transistor layout variation. There are three advantages in the proposed method. Firstly, there is no need to change the normal design flow used in layout designs. Secondly, there is no need to perform simulation in order to extract the transistor layout variation. Thirdly, early warnings in layout design lead to decreasing the number of post layout simulations. Less post layout simulations will decrease the number of iterations in the design cycle and shorten design period. The number of bad transistors in the early design phase were reduced from 17.8% to 2.9% by applying eDRC environment for layout designers to develop Standard Cell Library.

• JSTS:Journal of Semiconductor Technology and Science
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• v.14 no.5
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• pp.525-536
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• 2014

Recently, the first generation of mass production of FinFET-based microprocessors has begun, and scaling of FinFET transistors is ongoing. Traditional capacitance and resistance models cannot be applied to nonplanar-gate transistors like FinFETs. Although scaling of nanoscale FinFETs may alleviate electrostatic limitations, parasitic capacitances and resistances increase owing to the increasing proximity of the source/drain (S/D) region and metal contact. In this paper, we develop analytical models of parasitic components of FinFETs that employ the raised source/drain structure and metal contact. The accuracy of the proposed model is verified with the results of a 3-D field solver, Raphael. We also investigate the effects of layout changes on the parasitic components and the current-gain cutoff frequency ($f_T$). The optimal FinFET layout design for RF performance is predicted using the proposed analytical models. The proposed analytical model can be implemented as a compact model for accurate circuit simulations.

• Proceedings of the KAIS Fall Conference
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• 2002.05a
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• pp.106-108
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• 2002

반도체 physical layout design rule이 작아짐에 따라 Proximity effect와 overlay가 Pattern 구현에 크게 영향을 미치고 있다. Metal layer와 contact의 부족한 overlay margin으로 overlay 불량이 발생하고, 감소한 space margin으로 인해 bridge와 같은 문제가 나타난다. 따라서, resolution을 향상시키고, 최소한의 overlay margin을 확보함으로써 미세 pattern의 구현을 가능하게 한다. 이를 위해 OPC와 attPSM 같은 분해능향상기술이 사용된다. 그러나 attPSM의 사용은 원하지 않는 pattern이 생성되는 sidelobe와 같은 문제가 발생한다. 따라서 serial image simulation올 통해 추출한 rule을 rule-based correction에 적용하여 sidelobe현상을 방지한다. 그리고 overlay margin 부족으로 나타나는 문제는 metal layer와 contact overlap되는 영역의 line edge를 확장하고, rule checking을 통해 최소한의 space margin을 확보하여 해결한다 따라서 overlay error를 rule-based correction을 사용하여 효과적으로 방지한다.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.12 no.1
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• pp.75-82
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• 2000

This paper presents the predicted results by CFD technique of air flow and contaminant distribution in a full-scale kitchen opened to a living room, ventilated by a exhaust hood. To analyze the characteristics of the indoor environment, the concept of contaminant index was defined. In this study, the locations of the gas range and the window were chosen as the parameters to investigate the indoor environment. The values of the contaminant index for several layout of the gas range and the window were calculated and compared. When the gas range is installed along the wall with specified window location, its position in relation to the wall has unnoticed effect on contaminant infer. Once the location of the gas range is fixed, the indoor air quality may deteriorate by the proximity of the window to the gas range. This is due to the shorter distance that external fresh air must travel within the kitchen before it reaches the exhaust fan.

• The Journal of the Korea Contents Association
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• v.21 no.2
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• pp.520-527
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• 2021

In this study, we focused on the low practicality of traditional outdoor advertisements due to uniformity of materials, shapes, and designs, so in order to improve it, we will analyze impact on the practicality of outdoor advertisements depends on the attached type of advertising signboards. The research method is to set up a research model and hypotheses through a literature review and conduct a survey and then perform factor analysis and hierarchical regression analysis. Hypothesis1. The evaluation factors (readability, formability or symbolism) of outdoor advertising signboard in traditional markets will affect their practicality. Hypothesis 2. The type of attached advertising signboards (protruding type or wall-type) in traditional markets will control the impact of each evaluation factors' on practicality. In a result, readability and formability will affect practicality. To increase practicality, the size, color, font, layout and etc. of outdoor advertising signboards should be well recognized to get the better understanding. Also, practicality will be increased by the harmonization and the sense of balance.