Patent ID: 7402449
Filing Date: 2008-07-22
Classification: B81B,B81C

Abstract:
1. A manufacturing method of an integrated micro electro-mechanical system, in which a micro machine formed by using a manufacturing technology of a semiconductor integrated circuit and a semiconductor integrated circuit are formed on a semiconductor substrate, said method comprising the steps of: (a) forming a mechanical structure which is a part of said micro machine, said mechanical structure including a fixed part which is elastically un-deformable and fixed to an interlayer dielectric layer, a movable part which is movable in a cavity, and an elastically deformable part which connects said fixed part with said movable part, a width of said fixed part is wider than a width of said elastically deformable part in plan view; (b) forming the interlayer dielectric layer covering said mechanical structure, said interlayer dielectric layer being formed as a part of an interconnect of said semiconductor integrated circuit; (c) forming said cavity in which said mechanical structure is placed by forming a film having holes on said interlayer dielectric layer which covers said mechanical structure and etching said interlayer dielectric layer around said mechanical structure through said holes to form said cavity; and (d) sealing said cavity by sealing only said holes, wherein said step (a), said step (b), said step (c) and said step (d) are performed by using a technology for forming an interconnect of said semiconductor integrated circuit.