本研究目的在於探討電子構裝型式PBGA中的BT基板材料在不同應變率拉伸試驗之機械性質，以BT樹脂與玻璃纖維所疊合成之 複合材料積層板為試片，試片的設計分為原始未經鑽孔處理的試片，及經鑽孔分布的試片，分別在承受不同應變率下的拉伸試驗後探討應變率效應對此種材料機械性質的影響。
在拉伸試驗的過程中，分別以10-5 、10-4 、10-3、10-2、10-1 (㎜/㎜/s)五種應變率對BT材料進行拉伸試驗，發現拉伸速率越快 ，材料的拉伸強度越強，剛性(E)也越高，拉伸破壞的應變也會加大，在較快速率的拉伸試驗下，BT板試片會有脫層破壞的現象，因為拉 伸速 率越快造成複合材料90度方向束制變弱，所受的層間應力大於材料 層間所能承受，因而先脫層破壞，最後纖維斷裂 。

本研究亦以五種不同鑽孔排列設計的BT材料作為試片，以10-4 、10-3、10-2 (㎜/㎜/s)三種不同的拉伸應變率對其作拉伸試驗，探討其孔心間距與試片受力面積對其拉身破壞強度的影響，並討論其破壞機制。

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