以表面處理及塗佈奈米粒子抑制錫晶鬚生長; The Suppression of Tin Whisker Growth by Surface Coating of Nano Particles and Surface Treatments

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Title:	以表面處理及塗佈奈米粒子抑制錫晶鬚生長;The Suppression of Tin Whisker Growth by Surface Coating of Nano Particles and Surface Treatments
Authors:	丁怡真;Yi-Chen Ding
Contributors:	化學工程與材料工程研究所
Keywords:	錫晶鬚;whisker
Date:	2009-07-14
Issue Date:	2009-09-21 12:32:00 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	將奈米氧化錫顆粒分散懸浮於去離子水中，並利用噴嘴以噴淋的方式噴淋於以銅為基板的錫膜表面。噴淋的奈米氧化錫層被包含於再生氧化層中，用來抑制錫晶鬚的生長。結果顯示奈米氧化錫顆粒對於錫晶鬚的生長有確實的抑制作用。將表面經過預處理的試片，置於25oC、40oC和60oC下43週，有很多突起物生長於試片表面，但比表面未經預處理的試片突起物數量少很多。其XPS結果顯示，拋光及酸蝕等預處理有將表面氧化層去除。最後噴淋奈米氧化錫顆粒，經過退火處理後，而生成的再生氧化層，提供許多弱點讓錫晶鬚和突起物生長。此結果成功的增加許多洩壓點讓突起物生長，而抑制較長的錫晶鬚生長。 Tin oxide nano particles dispersed in water solution were sprayed on the tin-plated copper surface and served as coating layer in order to study its effect on the prevention of tin whisker formation. The results indicated that tin oxide nano particles could inhibit the growth of tin whiskers to certain extent. Many hillocks instead of long whiskers grew on the surfaces of samples that underwent 25oC, 40oC and 60oC annealing for 43 weeks. Furthermore, a strong etchant and polishing were applied to the tin-plated samples. XPS results showed that the surface oxide was removed by surface treatments; the surfaces were then coated by spraying nano particles. It is found that the coherency of the re-grown oxide during annealing was reduced, leading to the growth of hillocks instead of long whiskers. This approach seems to successfully enhance the relaxation of stress to prevent the growth of long whiskers.
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] Electronic Thesis & Dissertation

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