In general terms, ultrasonic bonding
uses high frequency sound to generate localized heat through vibration and causes thermoplastic fibers to bond together.
The variables studied included aluminum pad properties, capillary geometry, bond pad design (aluminum pad thickness, aluminum pad coated with nickel layer), and the effect of ultrasonic bonding
The In and Sn-3Ag layers have much lower melting temperatures than the base material (Cu) and can be melted through the heat generated during ultrasonic bonding
, forming intermetallic compounds (IMCs).
For example, with ultrasonic bonding
used on a continuous web, it is easy to stop the line for a problem, but with heat welding, the engaged knives would continue to melt the plastic during a stop.
A high degree of reliability in the heat cycle is ensured through the application of powerful ultrasonic bonding
The IGBT modules integrate a sixth-generation V-IGBT chip to achieve low power loss, and feature a high degree of reliability in the heat cycle by utilizing ultrasonic bonding
The ultrasonic bonding
ability of the Rotosonic machine--the latest creation from Herrmann Ultrasonics--is up to 10 times faster than sewing or gluing processes, according to the Bartlett, IL-based company.
can be up to 10 times faster than sewing or gluing processes.
Enables automated deposition and is compatible with thermal compression and ultrasonic bonding
They were using adhesives with ultrasonic bonding
, but this is faster and doesn't create debris that can contaminate the part's electrical system," Callough said.
It works well with ultrasonic bonding
, spin welding, adhesive bonding, and heat-staking.
1] The advantage of ultrasonic bonding
is that it requires no heating of the substrate or the die that is being bonded.