An acceleration sensor chip comprising a support frame part, and a sensor structure including at least one displaceable weight part and beam parts for connecting said weight part to said support frame part, said support frame part and said sensor structure being formed on a silicon substrate through an insulating layer,
- wherein said insulating layer between said sensor structure and said silicon substrate is removed, said beam parts defining a plurality of beams, each of said beams being parallel to each of the other beams, said weight part being connected to said support frame part by said beam parts, and at least two semiconductor strain gauges being formed on the surface of at least one set of said plurality of parallel beams.