使用於矽穿孔耦合分析之垂直十字鏈基板結構

VCCSS: A Vertical-Cross-Chain Substrate Structure Used in TSV Coupling Analysis

游祥凱(Siang-kai You)

指導教授 ： 陳繼展 ； 梁新聰 ； 陳竹一

國立中央大學/資訊電機學院/電機工程學系/碩士(2010年)

摘要

隨著三維晶片裡的矽穿孔密度增加，兩訊號互相干擾將會造成訊號的傳輸品質發生問題。TSV串音干擾主要的因素取決於TSV diameter及兩TSV之間的間距(spacing)。此外，矽基板的厚度及參雜濃度也發揮了重要的作用，它們影響基板接地的有效性。本論文主要提出等效垂直十字鏈基板結構(Vertical-Cross-Chain Substrate Structure;VCCSS) 針對兩TSV之間的耦合效應來加強模擬的精準度，此VCCSS模型是single cross cube的擴展延伸，其中矽基板是被垂直分段成好幾層。相對應的TSV model也被等效均勻切割，它們結合起來去建構等效的模型來分析耦合效應。特別是基板有接地時，從模擬結果中得到可提高18.5%的準確度，展現出從TSV到頂部基板接地會有一收集發散電流的深度效應。從串音干擾預防的觀點來看，無論是基板接地或是Ground TSV的方式皆比使用間距來的有效。

關鍵字

矽穿孔 ； 矽基板 ； 參雜濃度 ； 耦合

並列摘要

As to increase the Through-Silicon-Via (TSV) density in the three-dimensional chip integration, the quality of signal transmission may be problem on the two signals interfering with each other. The major factors of TSV crosstalk are determined by the diameter of TSVs and their spacing between two TSVs. Besides, the thickness and the doping concentration of the silicon substrate also play a key role, where they determine the effectiveness of substrate-grounds. In this thesis, a Vertical-Cross-Chain Substrate Structure (VCCSS) is proposed to enhance the simulation accuracy for TSV coupling analysis. The VCCSS model is an extension of single cross cube, in which the substrate is segmented vertically into several layers. By the conjunction of the corresponding segmented T-model of TSV, they are combined to construct the electrical equivalence under coupling analysis. It is shown that VCCSS will gain the improved accuracy to 18.5%, especially for the cases of substrate grounding, which exhibit the depth effect of converging the emitted current from TSVs into top ground pad. From the viewpoint of crosstalk prevention, both the ways of substrate and TSV grounding are more effective than spacing.

並列關鍵字

TSV ； silicon substrate ； doping concentration ； coupling

參考文獻

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