晶片推力

Die shear on LTCC
LTCC推力測試

各式晶片測試應用的技術領導者

推力值可以非常具有代表意義,依據不同類型的連結層(焊錫,導電膠, 非導電膠) 以及晶片尺寸.

為了涵蓋這個範圍, XYZTEC 提供一個廣泛的工具選擇和夾具. 除此之外, 也可以提供客製化的工具. 我們的Condor 150HF 可以執行高達500kgf 的推力.


專利設計的自動對位推刀

The self aligning shear tool is designed for forces up to 500kgf
The self aligning shear tool is designed for forces up to 500kgf

A fundamental problem exists when shear testing large die; the strength of the bond is in proportion to the area of the die but the area available to apply the shear load is much smaller being limited to that of one of its edges. As die become larger and thinner the relative sizes of these two areas can result in the stresses created by the shear tool being higher than the yield strength of the die causing it to splinter or shatter before the bond is tested.

In many cases this undesirable effect can be eliminated with the use of XYZTEC’s latest shear tool development*. The part of the tool that contacts the die is a shear block. It should be a relatively soft material like aluminium or mild steel. Because it is softer than the die it deforms at the points of contact that inevitably result due to surface irregularities between the edge of the die and the tool tip. This deformation considerably reduces the high contact stresses that would otherwise cause the die to fail.

Self aligning shear tool
Side view self aligning shear tool

The shear block is held in place on a mount by vacuum. The block can rotate slightly (self alignement). Another feature is that its underside can include an undercut that ensures a precise shear height. Without this system deformations in the vertical axis caused by the very high shear forces can cause the shear tool either rise or fall relative to the substrate. If the tool lifts it increases the stress concentration on the edge of the die making die failure likely. This feature is ideally suited for testing stacked die which are very thin and require such precise control of shear height. XYZTEC offers a complete solution for die shear testing that consists of the self aligning tool and a special die shear work holder. This combinations supports high shear forces. The work holder also offers a protection cap for the safety of the operator and with specials masks it is possible to test dies on different angles and in different sizes.

* Patent PCT/NL2010/050545, CN102770747, EP2473832, WO2011028107

Click here to download the flyer on our "Self Aligning Shear Solution" (PDF).


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