Patent ID: 7833880

Claim:
A process for manufacturing a micromechanical device comprising two support parts, one of which ( 12 , 20 ) comprises silicon and the other of which comprises silicon or a semiconductor, ceramic or oxidic material, functional elements ( 11 ) and optional auxiliary elements present on at least one of the support parts, and a getter material deposit ( 13 , 24 ) present on one silicon support part, the method comprising the steps of: providing a first support part ( 10 ) on which the functional elements ( 11 ) and optional auxiliary elements of the device are built; providing a second support part ( 20 ); the first and second support parts being formed such that, when mating, they form a cavity ( 14 ) wherein the functional elements, optional auxiliary elements and getter material deposit are housed; approaching the two support parts so as to form the cavity and welding the two support parts by direct bonding; wherein the getter material deposit is formed on the silicon support part by a first operation of forming on the silicon support part an intermediate layer ( 23 ) of a vitreous, ceramic or oxidic material having thickness of at least 50 nanometers, and a second operation of depositing a getter material layer ( 24 ) having thickness not greater than 10 micrometers onto the intermediate layer; and wherein the getter material comprises an alloy containing zirconium and at least a second element selected from molybdenum, niobium, tantalum and tungsten, wherein zirconium is present in the alloy in a proportion between 70 and 97% by weight.