Abstract:
A piezoelectric vibrator includes a base substrate and a lid substrate which are bonded to each other with a cavity formed therebetween; a piezoelectric vibrating reed which has a pair of vibration arm portions extending in parallel and is mounted on the base substrate within the cavity; and a getter material of a metallic film that is formed on the base substrate or the lid substrate so as to be arranged within the cavity and improve a degree of vacuum within the cavity by being heated. A restriction portion, which is arranged in the cavity and restricts a scattering direction of the getter material evaporated by the heating to suppress a scattering amount scattering toward the vibration arm portion, is formed in the base substrate or the lid substrate.
Abstract:
A piezoelectric vibrator including a base substrate and a lid substrate which are bonded to each other with a cavity formed therebetween; a piezoelectric vibrating reed which has a pair of vibration arm portions extending in parallel, a pair of excitation electrodes that vibrate the pair of vibration arm portions, and a mount electrode that is electrically connected to the pair of excitation electrodes, the piezoelectric vibrating reed being mounted on the base substrate within the cavity via the mount electrode; an insulation film which is formed on the piezoelectric vibrating reed so as to cover the excitation electrodes; and a getter material formed of the metallic material that is formed on any of the base substrate or the lid substrate so as to be arranged within the cavity and improve a degree of vacuum within the cavity by being heated.
Abstract:
Providing a package and a method for manufacturing the package capable of achieving improvement in the degree of vacuum in the cavity, and to provide a piezoelectric vibrator, an oscillator, an electronic device, and a radio-controlled timepiece. There is provided a package which includes a plurality of kinds of gettering materials 20, 21 having different activation temperatures and which are capable of being activated by heating is disposed in the cavity C.
Abstract:
Provide a highly efficient manufacturing method of a piezoelectric vibrator and to provide a piezoelectric vibrator manufactured by this manufacturing method. A method for manufacturing a piezoelectric vibrator 1 including: a base board 2 and a lid board 3 which are superimposed on each other so as to form a cavity therebetween; a piezoelectric vibrating reed 4 which is accommodated in the cavity and bonded to the base board; a bonding film 35 which is formed on the entire surface of the lid board on the opposite side to the base board so as to bond both boards to each other at a portion thereof being in contact with the base board, wherein the piezoelectric vibrating reed includes a pair of vibrating arms 10 and 11 and a weight metal film 21 formed on a tip end of each of the vibrating arms, wherein the bonding film is formed of a material which is capable of absorbing surrounding gas by being activated with laser irradiation, and wherein the method includes a laser irradiation step of simultaneously irradiating the weight metal film and the bonding film with a laser beam.