Patent ID: 7848371

Claim:
A laser device formed by a stack of laser diodes, the laser device comprising: (a) a plurality of plates, wherein each plate is formed of a material that is electrically conductive and a good heat conductor; and (b) a plurality of laser diodes, wherein each laser diode is arranged on a plate, wherein the plates are arranged next to each other, and two adjacent plates are located on either side of each of the laser diodes, wherein the plates provide an electric connection between the plurality of laser diodes that allows an electric supply current to pass and also allows the heat generated by the diodes to be conveyed in a direction of a cooling body to which the plates are secured by a securing material, wherein each plate is provided with a separate electrically insulating layer at an end of each plate on a side or the cooling body, wherein each of the separate electrically insulating layers forms an interface between the securing material on the cooling body and a respective plate, wherein each of the separate electrically insulating layers covers a bottom face of an end of a respective plate and extends substantially as far as a first height along lateral faces of the respective plate, and wherein the securing material covers bottom faces of the separate electrically insulating layers and also along lateral faces of the separated electrically insulating layers over a second height less than the first height.