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GAISER CAPILLARY INFORMATION

10. INSIDE CHAMFER ANGLE PAGE 2 (2)

GTC Figure 27

Figure 27. The straight 120 I.C. angle capillary provides the sharpest transition from the I.C. to the hole. The sharp edge that is created can cause considerable drag which can cause sagging or wavy wire.  

 

GTC Figure 28

Figure 28. The straight 90I.C. angle capillary does not have as sharp at a transition as the straight 120 I.C. angle style. This allows for less drag on the wire and therefore gives better looping. 

 

GTC Figure 29

Figure 29. The 120 double I.C. angle capillary consists of a 120 and 80 angle as shown above. The 80 angle provides a smooth transition into the hole for improved looping. The 120 angle produces strong tail bonds and higher ball shear strengths. 

 

GTC Figure 30

Figure 30. The 90 double I.C. angle capillary consists of 90 and 50 angles as shown above. The 50 I.C. angle provides a smooth transition into the hold for good looping. The 90 angle forms a taller, more compact ball bond and provides good tailing. 

GTC Figure 31

Figure 31. The 120 radiused inside chamfer design provides excellent looping characteristics and wire control. This design is often preferred for high speed, low loop, long loop, and spider leg applications. 

 

GTC Figure 32

Figure 32. Most low loop bonds, (0.006in./152m) or less, are bonded with a capillary that has a radiused inside chamfer. Using 0.001in./25m wire, these loops are 0.0052in./132m high and spanned an average length of 0.138in./3.5mm. 

(Photo courtesy Shinkawa Corporation)

GTC Figure 33

Figure 33. The fine pitch (0.0045in./114m) application pictured here has loops commonly called spider legs. Spider leg loops vary in their shape and length as well as height depending on the application. This 160 lead Quad Flat Pack has the die pads located 0.059in./1.5mm from the edge of the die. 

(Photo courtesy Shinkawa Corporation) 

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