METHOD OF ASSEMBLING LASER STRUCTURES ON HEAT-REMOVING BASE MADE FROM BORON NITRIDE CERAMIC Russian patent published in 2010 - IPC H01S5/32 H01L21/58 

FIELD: physics.

SUBSTANCE: method of assembling laser diode structures (active elements) on a heat-removing base made from boron nitride ceramic involves depositing onto the surface of the heat-removing base a series of metal layers of at least a metal-coating layer and a solder layer, putting the active element onto the metal layer, aligning it relative the base, soldering it while heating in a reducing medium with or without a mechanical load on the element and its subsequent cooling. According to the invention, the first metal-coating layer with thickness of 0.1-0.2 mcm is chemically deposited onto the surface of the heat-removing base by depositing nickel metal from a cured electrolyte with the following ratio of components, in wt %: NiCl₂·6H₂O - 45-55; NaH₂PO₂·H₂O - 9-13; (NH₄)·HC₆H₅O₇ - 60-70; NH₄Cl - 45-55. The SnPb (or In) solder layer is deposited through vacuum coating and thickness of the solder layer is selected depending on the size of the laser structures.

EFFECT: simpler assembling process and assembling reproducibility, increased reliability and quality of the contact joint, improved temperature-compensation parametres, and possibility of replacing precious metals used in assembling laser structures on heat sinks.

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