Patent ID: 8261427

Claim:
A method for manufacturing a crystal device, comprising: forming a crystal frame of a crystal material, the crystal frame including a first main surface and a second main surface, a crystal vibrating piece, and an outer frame surrounding and supporting the crystal vibrating piece; forming a package base of a crystal material, the package base including inner and outer main surfaces; forming, either on the second main surface of the crystal frame or on the inner main surface of the package base, a first step portion and a second step portion, each step portion having a designated height and being situated to serve as a respective electrode-connection site; forming, on each of the first and second main surfaces of the crystal vibrating piece, respective a first excitation electrode and a second excitation electrode and respective a first extraction electrode and a second extraction electrode connected to the respective excitation electrodes, the first and second extraction electrodes each having a defined thickness and extending to the outer frame; forming, on the inner main surface of the package base, a first connection electrode and a second connection electrode each having a defined thickness, wherein either the first and second step portions are located on the second main surface on which the first and second extraction electrodes extend onto the first and second step portions, respectively, for connection to the first and second connection electrodes, respectively, or the first and second step portions are located on the inner main surface on which the first and second connection electrodes extend onto the first and second step portions, respectively, for connection to the first and second extraction electrodes, respectively, and wherein the first and second step portions each have a height that is less than the thickness of the respective extraction electrode plus the thickness of the respective connection electrode; forming, on the outer main surface of the package base, a first external electrode connected to the first connection electrode and a second external electrode connected to the second connection electrode; aligning the package base and crystal frame in contact with each other such that each external electrode is aligned via the respective connection electrode with the respective extraction electrode, while leaving a gap between the second main surface and the inner main surface; and while maintaining the alignment of the package base with the crystal frame, pressing the package base and crystal frame together sufficiently to eliminate the gap while siloxane bonding the second main surface to the inner main surface.