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| 講演名 | 2010-11-12 14:30 Characteristics of electric charges carried by dust particles and their effects on electrical contact failures ○Jinchun Gao（Beijing Univ. of Posts and Telecom.）  EMD2010-116 |
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| 抄録 | （和） | Dust contamination is one of the major causes of electrical contact failure. The deposition of dust and adhesion of particles are affected by the electric charges carried by the dust particles. This paper describes characteristics of electric charges carried by dust particles and their effects on electrical contact failure. A Millikan testing method was used for measuring the electric charges. The results show that the variation of electric charges carried by dust particles is located in a band region, the trend of charges can be expressed as a third order equation, the results obtained for positive and negative charge are similar. The morphology and surface seem to be the major factors which influence the electric charge. The relative humidity of the environment greatly affects the amount of electric charge. It is found that dust particles carry negative charges or positive charges, those particles will be attracted to both electric contact surfaces respectively, and thereby the probability of causing electrical contact failure is greatly increased. The selective deposition of particle takes place on electrical contact surface. The failed connectors were characterized by using SEM/EDS. Serious contaminants were detected at the contact interfaces, and the contaminants contained the major elements of dust, namely Si, and Al. Dust particles depositing at contact sports can cause electrical contact failure. They can also result in forming tiny holes in the Au film during plating process as well as influencing Au film adhesion. Appropriately controlling the environmental humidity during operation of the electro-mechanical components and protecting the contact interface from dust can effectively lower electrical contact failure. |
| （英） | Dust contamination is one of the major causes of electrical contact failure. The deposition of dust and adhesion of particles are affected by the electric charges carried by the dust particles. This paper describes characteristics of electric charges carried by dust particles and their effects on electrical contact failure. A Millikan testing method was used for measuring the electric charges. The results show that the variation of electric charges carried by dust particles is located in a band region, the trend of charges can be expressed as a third order equation, the results obtained for positive and negative charge are similar. The morphology and surface seem to be the major factors which influence the electric charge. The relative humidity of the environment greatly affects the amount of electric charge. It is found that dust particles carry negative charges or positive charges, those particles will be attracted to both electric contact surfaces respectively, and thereby the probability of causing electrical contact failure is greatly increased. The selective deposition of particle takes place on electrical contact surface. The failed connectors were characterized by using SEM/EDS. Serious contaminants were detected at the contact interfaces, and the contaminants contained the major elements of dust, namely Si, and Al. Dust particles depositing at contact sports can cause electrical contact failure. They can also result in forming tiny holes in the Au film during plating process as well as influencing Au film adhesion. Appropriately controlling the environmental humidity during operation of the electro-mechanical components and protecting the contact interface from dust can effectively lower electrical contact failure. | |
| キーワード | （和） | Dust particles / Electric charge / Contamination / Contact failure / / / / |
| （英） | Dust particles / Electric charge / Contamination / Contact failure / / / / | |
| 文献情報 | 信学技報, vol. 110, no. 270, EMD2010-116, pp. 205-210, 2010年11月. | |
| 資料番号 | EMD2010-116 | |
| 発行日 | 2010-11-04 (EMD) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| 著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します．(許諾番号：10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| PDFダウンロード | EMD2010-116 |
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| 研究会情報 | |
| 研究会 | EMD |
| 開催期間 | 2010-11-11 - 2010-11-12 |
| 開催地（和） | 西安交通大学（中国、西安） |
| 開催地（英） | Xi'an Jiaotong University |
| テーマ（和） | IS-EMD2010（機構デバイス研究会第10回国際セッション） |
| テーマ（英） | IS-EMD2010 (10th International Session in Electro-Mechanical Devices) |
| 講演論文情報の詳細 | |
| 申込み研究会 | EMD |
| 会議コード | 2010-11-EMD |
| 本文の言語 | 英語 |
| タイトル（和） | |
| サブタイトル（和） | |
| タイトル（英） | Characteristics of electric charges carried by dust particles and their effects on electrical contact failures |
| サブタイトル（英） | |
| キーワード(1)（和/英） | Dust particles / Dust particles |
| キーワード(2)（和/英） | Electric charge / Electric charge |
| キーワード(3)（和/英） | Contamination / Contamination |
| キーワード(4)（和/英） | Contact failure / Contact failure |
| キーワード(5)（和/英） | / |
| キーワード(6)（和/英） | / |
| キーワード(7)（和/英） | / |
| キーワード(8)（和/英） | / |
| 第1著者 氏名（和/英/ヨミ） | Jinchun Gao / Jinchun Gao / |
| 第1著者 所属（和/英） | Beijing University of Posts and Telecommunications (略称： Beijing Univ. of Posts and Telecom.) Beijing University of Posts and Telecommunications (略称： Beijing Univ. of Posts and Telecom.) |
| 講演者 | 第1著者 |
| 発表日時 | 2010-11-12 14:30:00 |
| 発表時間 | 15分 |
| 申込先研究会 | EMD |
| 資料番号 | EMD2010-116 |
| 巻番号（vol） | vol.110 |
| 号番号（no） | no.270 |
| ページ範囲 | pp.205-210 |
| ページ数 | 6 |
| 発行日 | 2010-11-04 (EMD) |
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