Nano-scale copper oxidation on leadframe surface
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- 作者：Siti Rahmah Esa ; Rosiyah Yahya ; Aziz Hassan ; Ghazali Omar
- 关键词：Copper ; Oxidation ; Kirkendall voids ; HRTEM ; EELS ; AFM
- 刊名：Ionics
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：23
- 期：2
- 页码：319-329
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage;
- 出版者：Springer Berlin Heidelberg
- ISSN：1862-0760
- 卷排序：23
文摘
Copper oxidation studies were carried out by means of field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS) and electron energy loss spectroscopy (EELS) techniques. The growth of copper oxide occurs as a copper surface comes in an oxygen containing environment. The reaction sequence leading to oxidation of the copper surface is generally accepted to be oxygen chemisorption, nucleation and growth of the surface oxide and bulk oxide growth. HRTEM examination of the cross section of the oxidized copper sample revealed the interface region in between the copper and copper oxide. At high oxidation temperature, formation of micro-voids and separations were observed along this interface region. Poor adhesion at this interface region due to micro-voids and separation were found to be the root cause of delamination issue. EELS analysis determined that for regions with intact interface the oxidation system is Cu/CuO/Cu2O/CuO, however, in regions containing micro-voids or separation it is found to be Cu/Cu2O/CuO.