Search

Your search keyword '"Song, Jun-Yeob"' showing total 175 results
Start Over Author "Song, Jun-Yeob"
175 results on '"Song, Jun-Yeob"'

13. Machine Learning‐Based Solution for Thermomechanical Analysis of MMIC Packaging.

Author

Kang, Sumin, Lee, Jae Hak, Kim, Seung Man, Lim, Jaeseung, Park, Ah‐Young, Han, Seongheum, Song, Jun‐Yeob, and Kim, Seong‐Il

Subjects
MONOLITHIC microwave integrated circuits, PACKAGING equipment, SUPERVISED learning, LAMINATED composite beams, THERMAL stresses, RADIO frequency, WEB-based user interfaces
Abstract

Thermomechanical analysis of monolithic microwave integrated circuit (MMIC) packaging is essential to guarantee the reliability of radio frequency/microwave applications. However, a method for fast and accurate analysis of MMIC packaging structures has not been developed. Here, a machine learning (ML)‐based solution for thermomechanical analysis of MMIC packaging is demonstrated. This ML‐based solution analyzes temperature and thermal stresses considering key design parameters, including material properties, geometric characteristics, and thermal boundary conditions. Finite element simulation with the Monte Carlo method is utilized to prepare a large dataset for supervised learning and validation of the ML solution, and a laser‐assisted thermal experiment is conducted to verify the accuracy of the simulation. After data preparation, regression tree ensemble and artificial neural network (ANN) learning models are investigated. The results show that the ANN model accurately predicts the outcomes with extremely low computing time by analyzing the high‐dimensional dataset. Finally, the developed ML solution is deployed as a web application format for facile approaches. It is believed that this study will provide a guideline for developing ML‐based solutions in chip packaging design technology. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

14. Continuous Patterning of Silver Nanowire-Polyvinylpyrrolidone Composite Transparent Conductive Film by a Roll-to-Roll Selective Calendering Process.

Author

Jeong, Hakyung, Lee, Jae Hak, Song, Jun-Yeob, Ghani, Faizan, and Lee, Dongjin

Subjects
POVIDONE, TOUCH screens, PROCESS capability, SILVER, ELECTRONIC equipment, MOLECULAR weights
Abstract

The roll-to-roll (R2R) continuous patterning of silver nanowire-polyvinylpyrrolidone (Ag NW-PVP) composite transparent conductive film (cTCF) is demonstrated in this work by means of slot-die coating followed by selective calendering. The Ag NWs were synthesized by the polyol method, and adequately washed to leave an appropriate amount of PVP to act as a capping agent and dispersant. The as-coated Ag NW-PVP composite film had low electronic conductivity due to the lack of percolation path, which was greatly improved by the calendering process. Moreover, the dispersion of Ag NWs was analyzed with addition of PVP in terms of density and molecular weight. The excellent dispersion led to uniform distribution of Ag NWs in a cTCF. The continuous patterning was conducted using an embossed pattern roll to perform selective calendering. To evaluate the capability of the calendering process, various line widths and spacing patterns were investigated. The minimum pattern dimensions achievable were determined to be a line width of 0.1 mm and a line spacing of 1 mm. Finally, continuous patterning using selective calendering was applied to the fabrication of a flexible heater and a resistive touch sensing panel as flexible electronic devices to demonstrate its versatility. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

43. Mobile and remote operation for M2M application in upcoming u-manufacturing

Author

Kim Dong-Hoon and Song Jun-Yeob

Subjects
Engineering, Ubiquitous computing, business.industry, Mechanical Engineering, Interface (computing), Mobile computing, ComputerApplications_COMPUTERSINOTHERSYSTEMS, Remote operation, Mechanics of Materials, Embedded system, Teleoperation, Mobile telephony, business, Object Linking and Embedding, Embedded C
Abstract

This study tried to control and monitor computerized numerical controller (CNC) machines anywhere and anytime for machine (mobile) to machine (M2M) application in wired and wireless environment of upcoming ubiquitous manufacturing systems (u-Manufacturing). With a personal digital assistant (PDA) phone, the machine status and machining data of CNC machines can be monitored in wired and wireless environments, including the environments of IMT2000 and Wireless LAN. Moreover, CNC machines can be controlled anywhere and anytime. The concept of the anywhere-anytime controlling and monitoring of a manufacturing system was implemented for u-Manufacturing in this study. In this concept, the communication between the CNC controller and the PDA phone was successfully performed anywhere and anytime for the real-time monitoring and control of CNC machines. In addition, the interface between the CNC controller and the developed application module was implemented by object linking and embedding for process control (OPC) and shared CNC memory. For communication, the design of a server content module within the target CNC was based on a TCP/IP. Furthermore, the client content module within the PDA phone was designed with the aid of embedded c++ programming for mobile communication. For the interface, the monitoring data, such as the machine status, the machine running state, the name of the numerical control (NC) program, the alarm and the position of the stage axes, were acquired in real time from real machines with the aid of the OPC method and by sharing the CNC memory. The control data, such as the start, hold, emergency stop, reserved start and reserved stop, were also applied to the CNC domain of the real machine. CNC machines can therefore be controlled and monitored in real time, anywhere and anytime. Moreover, prompt notification from CNC machines to mobile phones, including cellular phones and PDA phones, can be automatically realized in emergencies.

Published
2008

47. Knowledge-Evolutionary Intelligent Machine Tools - Part 1: Design of Dialogue Module based on Agent Standard Platform in M2M Environment

Author

Kim Dong-Hoon and Song Jun-Yeob

Subjects
Ping (video games), Scheme (programming language), Engineering, business.product_category, business.industry, Flexible manufacturing system, computer.software_genre, Expert system, Machine tool, Machine to machine, Computer-integrated manufacturing, Interfacing, Systems engineering, business, Software engineering, computer, computer.programming_language
Abstract

For the effective operation of manufacturing system, FMS(Flexible Manufacturing System) and CIM(Computer Integrated Manufacturing) system are developed. In these systems, a machine tool is the target of integration in last 3 decades. In nowadays, the conventional concept of machine tools is changing to the autonomous manufacturing device based on knowledge-evolution through applying advanced information technology in which open architecture controller, high speed network and internet technology are contained. In this environment, a machine tool is not the target of integration but the subject of cooperation. In the future, a machine tool will be more improved in the form of a knowledge-evolution based device. In order to develop the knowledge-evolution based machine tools, this paper proposes the structure of knowledge evolution in M2M(Machine To Machine) and the scheme of a dialogue agent among agent-based modules such as a sensory module, a dialogue module, and an expert system. The dialogue agent has a role of interfacing with another machine for cooperation. To design the dialogue agent module in M2M environment, FIPA-OS and ping agent based on FIPA-OS are analyzed in this study. Through this, it is expected that the dialogue agent module can be more efficiently designed and the knowledge-evolution based machine tools can be hereafter more easily implemented.

Published
2006

Catalog

Books, media, physical & digital resources
See catalog results