Patent ID: 7874475

Claim:
A method for the planar joining of components of semiconductor devices, the method comprising: providing the components of semiconductor devices that are to be joined, the components including a component with a rear side and a base component with an upper side, wherein the upper side of the base component is to be joined with the rear side of the component; applying layers of joining material to at least one of: the upper side of the base component and the rear side of the component to be joined, the layers being applied to at least one of: individual components of semiconductor devices, semiconductor wafers including a plurality of individual components of semiconductor devices, and semiconductor chip carriers including a plurality of individual components of semiconductor devices; introducing the components to be joined into a reducing atmosphere such that the rear side of the component is disposed above the upper side of the base component; aligning the components to be joined; applying compressive pressure to the aligned components; and heating the compressed components in the reducing atmosphere to a diffusion joining temperature for isothermal solidification of the joining material thereby forming a diffusion joint, wherein: the diffusion joining temperature is below a melting temperature of the diffusion joint; and applying layers of joining material to the rear side of the component comprises: depositing a buildup of layers including: an aluminum layer; a first titanium layer; a nickel layer; a second titanium layer; a silver layer; and a gold/tin layer with 80Au/20Sn; wherein the aluminum layer is applied to the component and the gold/tin layer is applied to the silver layer.