Electro mechanical device and manufacturing method thereof, and resonator and manufacturing method thereof

1. An electro mechanical device comprising:

a main body of an electro mechanical device having a lower electrode and a movable member;

an overcoat film sealing the main body of said electro mechanical device by maintaining a space, wherein

a support post is provided between said overcoat film and said movable member.

2. The electro mechanical device according to claim 1 , wherein said support post is provided corresponding to one or more positions of said movable member.

3. The electro mechanical device according to claim 1 , wherein said support post is provided at the position corresponding to the support portion of said movable member.

4. A resonator comprising:

a resonator main body having a lower electrode and a movable member;

an overcoat film sealing said resonator main body by maintaining a space, wherein

a support post is provided between said overcoat film and said movable member.

5. The resonator according to claim 4 , wherein said support post is provided corresponding to one or more positions of said movable member.

6. The resonator according to claim 4 , wherein said support post has a width which is continuous from an arbitrary position between a position apart from the inner side edge of the support portion of said movable member by 0.5 μm and an outside edge of the support portion by including said outside edge.

7. The resonator according to claim 4 , wherein said support post has a constant width and is provided at an arbitrary position between a position apart from an inner side edge of a support portion of said movable member by 1.0 μm and an outside edge of the support portion.

8. A manufacturing method of an electro mechanical device comprising steps of:

forming a sacrifice layer which covers a movable member of a main body of an electro mechanical device and forming an opening portion for forming a support post which reaches said movable member in said sacrifice layer;

forming an overcoat film and a support post on said sacrifice layer by including said opening portion;

removing said sacrifice layer through a through-hole formed in said overcoat film and forming said overcoat film supported by said support post; and

sealing the through-hole of said overcoat film.

9. The manufacturing method of an electro mechanical device according to claim 8 , wherein said support post is formed so as to correspond to one or more positions of said movable member.

10. The manufacturing method of an electro mechanical device according to claim 8 , wherein said support post is provided at a position corresponding to the support portion of said movable member.

11. A manufacturing method of a resonator comprising steps of:

forming a sacrifice layer which covers a movable member of a resonator main body and forming an opening portion for forming a support post which reaches said movable member in said sacrifice layer;

forming an overcoat film and a support post on said sacrifice layer by including said opening portion;

removing said sacrifice layer through a through-hole formed in said overcoat film and forming said overcoat film supported by said support post; and

sealing the through-hole of said overcoat film.

12. The manufacturing method of a resonator according to claim 11 , wherein said support post is formed so as to correspond to a one or more positions of said movable member.

13. The manufacturing method of a resonator according to claim 11 , wherein said support post is formed so as to have a width which is continuous from an arbitrary position between a position apart from the inner side edge of the support portion of said movable member by 0.5 μm and an outside edge of the support portion by including said outside edge.

14. The manufacturing method of a resonator according to claim 11 , wherein said support post is formed so as to have a constant width and to exist at an arbitrary position between a position apart from an inner side edge of a support portion of said movable member by 1.0 μm and an outside edge of the support portion.