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Eight ways to lower defect rates below 100 ppm.
With so many variables, troubleshooting wire bond programs can be tricky. These tips will make the process a bit easier.
Tip 1. Confirm the wire bonder's setup is correct.
1. Install a new wire bonding tool and set screw. It not available, make sure the old bonding tool is the correct part number for the wire size being bonded. Under a microscope, at 10X minimum, inspect the tool and set screw to see if it is worn or dirty. Reinstall the tool and seat the set screw to the manufacturer recommended setting with a lorque wrench. Test the ultrasonics; if the ultrasonics are tuned and working properly, proceed with the setup.
2. Install a new spool of wire. If new wire is not available, continu the wire in the old spool is the correct size and alloy composition. Make sure the wire is not dirty, damaged...