Performance of EV inverter assemblies improved through collaboration

Sinter technology is changing EV inverter assembly with pressure sintering providing a significantly lower thermal resistance, superior power cycling and mechanical reliability over conventional techniques. ST is offering its STPAK package for automotive traction inverters for assembly directly onto the heatsinks through sintering using ALPHA Argomax silver sinter paste. The ALPHAArgomaxsinter paste, formulated using highly engineered silver particles, has been specially developed for low-pressure sinter die and package attachment. The paste creates a strong attachment through silver metallic bonds, offering physical strength, unsurpassed electrical conductivity and optimal thermal properties resulting in long-term reliability improvement.

“The collaboration between ST and MacDermid Alpha to develop and refine advanced sintering technology has been extremely effective in producing the perfect combination – STPAK package sintered with ALPHA Argomax“, said Edoardo Merli, Power Transistor Macro-Division General Manager and group vice president of STMicroelectronics Automotive and Discrete Group.

OEMs manufacturing EVs confirmed that the latest drivetrain with sinter technology resulted in 10% improvement in driving range with an overall inverter efficiency of 93%.

“This unique attach process provides an unparalleled level of flexibility, reducing the overall number of power discretes needed and enabling significant cost savings “, said Julien Joguet, Director of Marketing – Power Electronics at MacDermid Alpha. “ALPHA Argomax sinter package and die attach technology, which has already been deployed in more than 2 million electric vehicles, enables manufacturers to produce efficient and reliable electric vehicle powertrains, a key factor in the wider adoption of electric vehicles “

For more information on sinter technology, please visit the MacDermid Alpha website.