Copper Bumping Guidelines

Layout Guidelines
Copper Bumps (Solder, Nickel, Gold or Indium Cap)
1 Bump Height Average 100m(10m to 150m available)
2 Bump Height Uniformity ±5m (in die); ±15um (in wafer); ±20m (wfr to wfr)
3 Bump Pitch 150um Standard (Bump Height Dependant)
4 Bump Spacing 75µm Minimum (Bump Height Dependant)
5 Bump to Passivation Overlap 7µm Per Side Minimum
6 Pad to Bump Overlap 7µm Per Side Minimum
7 Passivation Opening 40µm Minimum
8 Cap Height 2-50um (Before Reflow)
9 Passivation Angle of Slope > 60 Degrees
10 Passivation Type Nitride, OxyNitride, Polyimide
11 Passivation Height 0.5-1.8 um
12 Wafer Edge Exclusion Zone 3mm
13 Mask design and Layout Requires GDSII or ACAD, Stepping Distance Wafer Map
     
  Specifications Copper Bumps (Solder, Nickel, Gold or indium Cap)
1 Bump Height Uniformity ±5m (in die); ±15m (in wafer); ±20m (wfr to wfr)
2 Copper Shear Strength >12 grams/mil2
3 Voids <10% of Bump Volume, No Exposed Pad
4 Missing Bumps None Outside Exclusion Area

 

 

 

 

 


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