GPUs, Mobile Devices and Power Electronics can operate at high power density and elevated junction temperature, increasing the demands on the die-attach interface. The joint must combine low thermal and electrical resistance with mechanical integrity through thermal cycling and aging.

Silver sintering is an established high-performance route. Copper sintering is technically attractive because of conductivity and cost, but oxidation and surface control remain major development challenges. AM has demonstrated controlled silver particle synthesis, while copper represents an additional development route for applications that benefit from its conductivity and cost profile. The particle chemistry, oxidation control and sintering window can be engineered around the target package and process.

A printed trace is the result of particle synthesis, formulation, deposition and cure acting together. Conductive inks and pastes must pass through a defined printing process, wet the substrate, dry without uncontrolled migration and form a continuous electrical network.

Particle size, surface chemistry and agglomeration influence every stage. AM positions the particle population as an input to the customer’s formulation and printing process, not as a guarantee that a powder specification alone delivers final conductivity.