Patent ID: 8723079

Claim:
A soldering method comprising: soldering together, in a single soldering step, at least three stacked elements forming a stack, in which a laser is directed onto an end face of the stack so that the laser heats the stack, and at least one parameter of the laser is adjusted, wherein: the stack comprises: a support, a first chip, a second chip, a first solder-forming mass, and a second solder-forming mass, the first solder-forming mass and the second solder-forming mass being interposed between the support and the first chip and between the first chip and the second chip, respectively, the parameter is adjusted to a value to take account of at least one thermal characteristic of the stack by using a mathematical model, and the thermal characteristic of the stack is selected from one of: a critical temperature for damaging an element of the stack, a melting temperature of one of the first solder-forming mass and the second solder-forming mass interposed between two elements of the stack, and a temperature of a synthetic material bordering one of the elements of the stack; and preparing a mathematical model for implementation of the soldering method in compliance with an experimental design.