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Current Testable Design of Resistor String DACs for Short Defects
Masaki Hashizume,Yutaka Hata,Hiroyuki Yotsuyanagi,Yukiya Miura 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
In this paper, we propose a DFT method for resistor string DACs that enables us to test them easily by supply current test method. The targeted defects are shorts in the DACs. It is shown by some experiments that all of the targeted defects in a DAC designed with the DFT method can be detected with a smaller number of test vectors.
Fault Analysis of Interconnect Opens in 90nm CMOS ICs with Device Simulator
Masaki Hashizume,Yuichi Yamada,Hiroyuki Yotsuyanagi,Toshiyuki Tsutsumi,Koji Yamazaki,Yoshinobu Higami,Hiroshi Takahashi,Yuzo Takamatsu 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
In this paper, faulty effects of interconnect opens in logic ICs fabricated with a 90㎚ CMOS process are analyzed by device simulation. In the analysis, it is examined whether a logical error can be caused at an opened input signal line by logic signals of the neighboring signal lines. The simulation results suggest us that a logical error may occur at an interconnect surrounding by 8 interconnects if the interconnects are longer than 5㎛ and the width of an open defect is greater than 2.0㎚.
Tribological properties of DLC films on polymers
T. HASHIZUME,S. MIYAKE,S. WATANABE,M. SATO 한국트라이볼로지학회 2002 한국트라이볼로지학회 학술대회 Vol.2002 No.10
Our study is to search for tribological properties of diamond-like carbon (DLC) films as known as anti-wear hard thin film on various polymers. This report deals with the deposition of DLC films on various polymer substrates in vacuum by magnetron radio frequency (RF) sputtering method with using argon plasma and graphite, titanium target. The properties of friction and wear are measured using a ball-on-disk wear-testing machine. The properties of friction and wear have been remarkably improved by DLC coating. Moreover the composition of DLC films has been analyzed by using auger electron spectroscopy(AES). The wear rate of titanium-containing DLC film is lower than that of no-metal-containing DLC film.