Method for connecting two components and component composite

#The present invention relates to a method for connecting two components with the aid of a laser weld seam. Furthermore, the present invention relates to a component composite which is manufactured according to a method according to the present invention and the use of a method according to the present invention.

#German Patent Application No. DE 10 2008 041 774 A1 describes a method in which the two components are laid one on top of another in a joining area and the first component is pressed against the surface of the second component with the aid of an annular clamping device. A defined contact between the two components for welding is thus generated in the joining area, in which the two components are connected to one another by fusing the material of at least one component with the aid of a laser beam and subsequently solidifying the melt. With sufficiently flat and/or thick and/or rigid components, it is ensured by the pressing of the two components against one another outside the focus of the laser beam that a sufficiently large joining area or sufficient melt is generated which connects the two components to one another.

#An example embodiment of the present invention may have the advantage that, in particular, in the case of conductor supports having a relatively minor thickness as the first component, it enables a stable welding process, so that it is advantageously usable in particular in mass production technological applications. In this case, this means in particular applications in electronics, as in the manufacture of control units or the like, for example, in the automotive area, or in the manufacture of batteries made up of a large number of relatively thin layers, the layers having to be connected to one another.

#FIG. 1 through FIG. 3 each show a perspective representation of differently designed clamping devices for clamping a first foil-like component against the upper side of a second component, in accordance with example embodiments of the present invention.

#FIG. 4 shows a longitudinal section during the formation of a laser weld seam, in accordance with an example embodiment of the present invention.

#FIG. 5 shows a detail of FIG. 4 in an enlarged representation.

#Identical elements or elements with identical functions are provided with the same reference numerals in the figures.

#A component composite 100 made up of two components 1, 2 is shown in each of FIGS. 1 through 3, which is formed by forming a laser weld seam 5, which is only completely shown in FIG. 3, by connecting the two components 1, 2. First component 1 is, for example, a foil 6 which is made up of an electrically conductive material, i.e., for example, copper, aluminum, gold, silver, or contains similar. Furthermore, first component 1 or foil 6 has a relatively low rigidity. Thickness d between 5 μm and 500 μm, preferably a thickness d of less than 100 μm of the foil 6 contributes to this at least in joining area 8, i.e. in the area of laser weld seam 5, in which the two components 1, 2 are connected with the aid of laser weld seam 5. furthermore, foil 6 has a width b between 0.5 mm and 20 mm in a horizontally extending plane in an extension direction perpendicular to the longitudinal direction of laser weld seam 5.

#Second component 2 is, by way of example and non-restrictively, a substrate 9 such as a circuit board, a ceramic substrate having conductor structures, or the like. Furthermore, second component 2 typically includes a metal coating (not shown in the figures) on the upper side facing toward first component 1. The formation of laser weld seam 5 causes a fusion of both first component 1 and second component 2 on the side facing toward first component 1 while forming a melt 12. After the solidification of melt 12, it forms laser weld seam 5.