Patent ID: 6483671
Filing Date: 2002-11-19
Classification: G11B

Abstract:
A microstructure comprising a micromechanical element and a monolithic encapsulation structure of semiconductor material, said micromechanical element being formed in a semiconductor material body and being externally delimited by a first and a second face, opposed to each other, and by a side delimitation trench, and comprising a mobile part and a fixed part, characterized in that said encapsulation structure surrounds said micromechanical element, said encapsulation structure having a bottom portion facing said second face of said micromechanical element and an outer side portion facing said side delimitation trench, and in that said encapsulation structure has at least one outer separation trench extending through said bottom portion, said outer separation trench separating a mobile region of said encapsulation structure from said external side portion and defining, together with said side delimitation trench, a labyrinth path for contaminating particles.