Synthesis surface effects on the stress and deformation of film/substrate system |
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Authors: | Shan-Shan ShaoFu-Zhen Xuan Zhengdong WangShan-Tung Tu |
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Institution: | Key Laboratory of Pressure System and Safety, MOE, School of Mechanical Engineering, East China University of Science and Technology, 130, Meilong Street, PO Box 402, Shanghai 200237, PR China |
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Abstract: | The closed-form solutions of bending curvature and stress distribution in film/substrate system with the synthesis surface effect are proposed by minimizing the total potential energy. Effects of the roughness and the residual surface stress on stress in film are addressed. Results reveal that, at a given thickness of the substrate, effects of roughness and residual surface stress on the bending curvature become significant with decreasing the film thickness. The roughing surface will enlarge the magnitudes of bending curvature and film stress. The direction change of residual surface stresses can lead to a reversed bending of film/substrate system. |
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Keywords: | Surface roughness Stress Film/substrate system |
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