Vacuum microdevice
First Claim
1. A vacuum microdevice comprising:
- a first electrode having a projection portion formed on a surface thereof, the projection having a sharp tip;
an insulating film formed in a region of said first electrode, excluding the sharp tip of the projection portion;
a second electrode formed in a region on said insulating film, excluding the sharp tip of the projection portion, to planarize a surface of said second electrode; and
a structural substrate bonded to a lower surface of said first electrode and having a recess portion in a bonding surface with the lower surface of said first electrode, the recess portion having a size large enough to cover a recess reflecting the sharp tip of the projection portion formed on the lower surface of said first electrode.
2 Assignments
0 Petitions
Accused Products
Abstract
A vacuum microdevice having a field-emission cold cathode includes a first electrode having a projection portion formed on its surface, the projection having a sharp tip, an insulating film formed in the region of the first electrode, excluding the sharp tip of the projection portion, a second electrode formed in a region on the insulating film, excluding the sharp tip of the projection portion, to planarize the surface of the second electrode, and a structural substrate bonded to the lower surface of the first electrode and having a recess portion in the bonding surface with the lower surface of the first electrode, the recess portion having a size large enough to cover a recess reflecting the sharp tip of the projection portion formed on the lower surface of the first electrode. The interior of the recess portion formed in the structural substrate communicates with the atmosphere outside the device. A support structure is formed on the surface of the second electrode to surround each projection portion formed on the first electrode. With this structure, a vacuum microdevice which can suppress variations in characteristics due to voids, and exhibit excellent long-term reliability can be provided.
21 Citations
10 Claims
-
1. A vacuum microdevice comprising:
-
a first electrode having a projection portion formed on a surface thereof, the projection having a sharp tip; an insulating film formed in a region of said first electrode, excluding the sharp tip of the projection portion; a second electrode formed in a region on said insulating film, excluding the sharp tip of the projection portion, to planarize a surface of said second electrode; and a structural substrate bonded to a lower surface of said first electrode and having a recess portion in a bonding surface with the lower surface of said first electrode, the recess portion having a size large enough to cover a recess reflecting the sharp tip of the projection portion formed on the lower surface of said first electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A vacuum microdevice comprising:
-
a first electrode having a projection portion formed on a surface thereof, the projection having a sharp tip; an insulating film formed in a region of said first electrode, excluding the sharp tip of the projection portion; a second electrode formed in a region on said insulating film, excluding the sharp tip of the projection portion, to planarize a surface of second electrode; a support substrate formed on a surface of said second electrode; and a structural substrate having pins and a recess portion, said structural substrate bonded to the support structure, wherein electrical signals are supplied to the second electrode and the first electrode by the pins of the structural substrate.
-
Specification