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首页> 外文期刊>Journal of Adhesion Science and Technology: The International Journal of Theoredtical and Basic Aspects of Adhesion Science and Its Applications in All Areas of Technology >Effect of the Ni/Pd/Au-Cu pre-plated finish lead frame surface structure treated by various surface roughening methods on packaging properties
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Effect of the Ni/Pd/Au-Cu pre-plated finish lead frame surface structure treated by various surface roughening methods on packaging properties

机译：各种表面粗糙化方法处理的Ni / Pd / Au-Cu预镀精整引线框架表面结构对包装性能的影响

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摘要

Two roughening methods involving micro-etching and mixed mode etching of pre-plated finish (PPF) surfaces were used to examine the nickel-coated layer thickness effect on the surface morphology. The PPF lead frames treated by micro-etching (ME) surface roughness drastically decreased with increased nickel-coated layer thickness, while the PPF lead frames treated by mix mode roughening (MMR) maintained comparatively good surface roughness even with thick nickel-coated layers. The shear strength of the PPF of a lead frame treated by ME and MMR reached up to five times that of the untreated PPF based on a moisture sensitivity level button shear test. The failure mechanism of the PPF lead frame treated by ME was the formation of cracks through the interface between the lead frame and the epoxy molding compound, which led to the breakage. An experimental basis is provided for the application of PPF lead frames, as well as a theoretical foundation for increasing the adhesion strength of rough surfaces. Therefore, this study is of great theoretical and practical significance.
机译：两种涉及粗糙化方法，包括预镀饰面（PPF）表面的微蚀刻和混合模式蚀刻，用于检查镀镍层厚度对表面形态的影响。通过微蚀刻（ME）表面粗糙度处理的PPF引线框架随着镀镍层厚度的增加而急剧下降，而通过混合模式粗糙化（MMR）处理的PPF引线框架即使在镀镍层较厚的情况下也保持了相对较好的表面粗糙度。根据水分敏感性水平纽扣剪切试验，经ME和MMR处理的引线框架的PPF剪切强度达到未处理PPF的五倍。经ME处理的PPF引线框的失效机理是通过引线框与环氧模塑化合物之间的界面形成裂纹，从而导致断裂。为PPF引线框架的应用提供了实验基础，并为增加粗糙表面的附着强度提供了理论基础。因此，这项研究具有重要的理论和实践意义。

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