• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.10
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• pp.4757-4761
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• 2012

LED chip on board(COB) package has been fabricated using aluminum substrate and aluminum anodization process. An alumina layer, used as a dielectric in COB substrate, is produced on aluminum substrate by selective anodization process. Also, selective anodization process makes it possible to construct a thermal via with a fully-filled via hole. Two types of the COB package are fabricated in order to analyze the effects of their substrate types on thermal resistivity and luminous efficiency. The aluminum substrate with the thermal via shows more improved measurement results compared with the alumina substrate. These results demonstrate that selective anodization process and thermal via can increase heat dissipation of COB package in this work. In addition, it is proved experimentally that these parameters also can be enhanced using efficient layout of multiple chip in the COB package.

• Proceedings of the Korean Reliability Society Conference
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• 2002.06a
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• pp.123-129
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• 2002

본 논문에서는 Regulator IC의 불량원인 규명을 통해 반도체 고장분석 방법 및 개선사례를 소개하고자 한다. 고장분석에 사용된 반도체 Package는 8Pin MSOP(Mini Small Outline Package)로, 시장 불량품을 분석한 결과 Regulator IC의 Stitch Bond에 Heel Crack이 발생하여 불안정한 출력을 발생시킴을 알 수 있었다. Stitch Bond Heel Crack의 원인은 Lead Frame부의 박리(Delamination)에 의해 열이나 진동 등의 외부 Stress가 직접 Stitch Bond에 가해져 Crack이 발생된 것으로, Reflow 재현시험을 통해 확인 할 수 있었다. 박리 발생에 의한 Stitch Bond Heel Crack 방지 대책으로 첫째, Bonding Type을 Stitch Bond 에서 Ball Bond로 변경하여 강도를 개선하고 둘째, PCB Layout 변경을 통해 외력이 직접 Regulator IC에 가해지지 않도록 하였다. 개선 결과 현재까지 시장에서 동일 불량은 발생하지 않았다.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.32A no.1
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• pp.138-145
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• 1995

The offset voltage in silicon Hall plates is mainly caused by stress and strain in package, and by alignment in process. The offset voltage is appeared random for condition change with time in the factory, is non-linearly changed with temperature. In this paper proposed new method of design of Hall IC, and methematicaly proved relation layout of chip of 90$^{\circ}$-shift-current Hall plate pair is matched with "Differentail to single ended Conversion amplifier." In the experiment, the offset voltage is reduced about 1/100 time than the original offset voltage.

• Archives of design research
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• v.16 no.3
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• pp.91-100
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• 2003

The Korea's automotive industry have been achieved remarkable growth with many original models for over 28 years since the first original model Pony had developed. And most of the early models were licensed from the other country's makers. Now it is independent with our own technologies and designs, and the automobile is one of the major exporting products of Korea. In the early times the basic design concept of a passenger car didn't reflect the characteristics of the way of domestic life, but today's Korean developed cars have speciffic characters those are distinguished to others not only in the overall body shape but also in the package layout. And it is considered that the Korean cars would have different characteristics to the others in the future. These changes would come from the ways of life of the nations characteristics and they would influence to technologies of development. And the influence would be resulted as another type of sedan which has much differences to the current sedans. The main elements and the reasons for the 'post sedan' have been observed to specify the characters of the future Korean sedan in this research.

• Journal of the Ergonomics Society of Korea
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• v.33 no.2
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• pp.87-96
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• 2014

Objective: The present study is intended to objectively classify upper- & lower-body sitting strategies and identify the effects of gender and OPL type on the sitting strategies. Background: A sitting strategy which statistically represents comfortable driving posture can be used as a reference posture of a humanoid in virtual design and evaluation of a driver's seat. Although previous research has classified sitting strategies for driving postures in various occupant package layout (OPL) types, the existing classification methods are not objective and the factors affecting sitting strategies have not been identified. Method: Forty drivers' preferred driving postures in three different OPL types (coupe, sedan, and SUV) were measured by a motion capture system. Next, the measured driving postures were classified by K-means cluster method. Results: Sitting strategies of upper-body were classified as erect (33%), slouched (41%), and reclined (26%) postures, and those of lower-body were classified as knee bent (42%), knee extended (32%), and upper-leg lifted (26%) postures. Significant differences at ${\alpha}$ = 0.05 in the upper-body sitting strategy by gender and lower-body sitting strategy by OPL type were found. Application: Both the classified sitting strategies and the identified factors would be of use in ergonomic seat design and evaluation.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.8
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• pp.1734-1740
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• 2012

In this paper, we propose a FSOURCE circuit which requires such a small switching current that an eFuse OTP memory can be programmed in the post-package state of the PMIC chips using a single power supply. The proposed FSOURCE circuit removes its short-circuit current by using a non-overlapped clock and reduces its maximum current by reducing the turned-on slope of its driving transistor. Also, we propose a DOUT buffer circuit initializing the output data of the eFuse OTP memory with arbitrary data during the power-on reset mode. We design a 24-bit differential paired eFuse OTP memory which uses Magnachip's $0.35{\mu}m$ BCD process, and the layout size is $381.575{\mu}m{\times}354.375{\mu}m$($=0.135mm^2$).

• The Journal of the Korea Contents Association
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• v.19 no.7
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• pp.304-313
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• 2019

Centered on top ten brands of jasmine tea in China "Zhang Yiyuan(張一元), Wu Yutai(吳裕泰), EFUTON (藝福堂), Shumingrun(蜀茗潤), Chunlun(春倫),Jinghua(京華),Bitan Piaoxue(碧潭飄雪), Tenfuku meicha(天福茗茶), Xiao Guan Tea(小罐茶),China Tea(中茶)", this paper has summarized four elements of packaging design (logo, color, layout, shape), developed a questionnaire of consumer preference degree on this basis, and conducted reliability and validity analysis. According to the questionnaire survey, the most popular logo is the "Xiao Guan Tea", and the most popular color among all six colors is the gray group. Among the eight lay outs of the jasmine tea package, the most popular lay out is the type 2 and the most popular package shape is shape 2 (rectangle).In conclusion, this paper has analyzed consumer preferences for packaging design of jasmine tea gift box based on the questionnaire survey results.

• Journal of Digital Convergence
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• v.20 no.2
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• pp.383-388
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• 2022

This study is about the elements of cosmetic's package design which MZ generation prefer and the effect on purchase. Naming, brand logo, color, typography, layout, illustration, matter & finish, and meaningful are classified 8 visual elements through the pilot study. After that this study analyzes specific visual elements which MZ generation prefer through online survey and In-depth interview based on the 8 visual elements. As a result of study, MZ generation prefer tidy and neat design to decorated style, and they feel brand logo is the most important thing of all 8 visual elements. In additional, meaningful of brand is barley able to compare with price, although it is significant visual element. This study may help to develop the way of the cosmetic's package design for MZ generation.

• Proceedings of the KIEE Conference
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• 2001.11c
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• pp.284-287
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• 2001

In this paper, we designed and implemented a precise pulse motor control chip that generates the parabolic speed pattern. This chip can control step motor[1], DC servo[2] and AC servo motors at high speed and precisely. It can reduce the mechanical vibration to the minimum at the change point of a degree of acceleration. Because the parabolic speed pattern has the continuous acceleration change. In this paper, we present the pulse generation algorithm and the parabolic pattern speed generation. We verify these algorithm using visual C++. We designed this chip with VHDL(Very High Speed Integrated Circuit Hardware Description Language) and executed a logic simulation and synthesis using Synopsys synthesis tool. We executed the pre-layout simulation and post-layout simulation with Verilog-XL simulation tool. This chip was produced with 100 pins, PQFP package by 0.35 um CMOS process and implemented by completely digital logic. We developed the hardware test board and test program using visual C++. We verify the performance of this chip by driving the servo motor and the function by GUI(Graphic User Interface) environment.

• Fashion & Textile Research Journal
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• v.10 no.3
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• pp.316-321
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• 2008

The purpose of this study is to find what male consumers value in their clothing behaviors, as well as to investigate how the consumers' shopping values and store VM impact on their clothing purchase behaviors. For data collection, research questionnaires were responded by 202 male students living in Busan. The collected data were analyzed according to the frequency-factor analysis using SPSS for win 10.1 Package, the factor analysis using Varimax, reliability analysis, and multi-regression analysis. The results of this study are as follows; First, the shopping values were composed of hedonic, utilitarian, and economic value, and VM was divided into store facility, store image, layout, and fashion information. Second, multi-regression analysis was conducted to find the impact of consumers' shopping values on their clothing purchase behaviors. The result showed that the hedonic shopping value and utilitarian shopping value significantly affected the consumers' clothing purchase behaviors, while economics shopping value did not show any statistical significance. Third, multi-regression analysis was conducted to find the impact of store VM on consumers' clothing purchase behaviors. The result showed that store image, layout, and fashion information had a significant impact on consumers' clothing purchase behaviors.