JP2007209039A5 - - Google Patents

Claims (6)

A quartz tuning fork base and a quartz tuning fork arm connected to the quartz tuning fork base and having a facing main surface, and configured to accommodate a tuning fork type bending quartz crystal that vibrates in a bending mode and a tuning fork type bending quartz crystal in case a, a lid configured crystal unit of the manufacturing method covers the case that,
The quartz tuning fork arms are configured with at least a first quartz tuning fork arms and the second crystal tuning fork arms, one end of each of the second quartz tuning fork arms and the first crystal tuning fork arms are connected to the quartz tuning fork base, the other end is a free, each of the second quartz tuning fork arms and the first crystal tuning fork arms, the first and second major surface and the first side face against a first main surface and a first major surface the quartz crystal unit manufacturing method which includes a tuning-fork type flexural quartz crystal resonator and a second side opposing the first side,
A first step of forming said crystal tuning fork base, a sound or shape with said second quartz tuning fork arms and the first quartz tuning fork arms,
A second step of forming a groove in each of the first major surface and a second major surface of each of the second quartz tuning fork arms and the first quartz tuning fork arms,
An electrode disposed on the first major surface and each of the grooves of the second main surface of the first crystal tuning fork arms, and a first side surface and the electrode disposed in each of the second side surface of the second quartz tuning fork arms is electrically connected to a first main surface and the electrode disposed in each of the grooves of the second main surface of the second quartz tuning fork arms, each of the first side and the second side surface of the first crystal tuning fork arms and arranged electrodes are electrically connected, and the electrical polarity of the first crystal tuning fork arms of the first main surface and the electrode disposed in each of the grooves of the second major surface, the second quartz tuning fork A third step of disposing the electrodes so that the electrical polarities of the electrodes disposed in the grooves of the first main surface and the second main surface of the arm are different from each other;
A fourth step of storing the tuning-fork type flexural quartz crystal resonator having the electrodes in to case,
A fifth step of connecting the cover to the case,
Anda sixth step of adjusting the frequency of the tuning fork type flexural quartz crystal resonator, and the tuning-fork flexural quartz crystal resonator includes the fundamental mode vibration and second harmonic mode vibration of the fundamental mode oscillation equivalent series resistance R ₁ is, the second harmonic mode to be less than the equivalent series resistance R ₂ of the vibration includes the step of determining the size of the overall length of the length between the tuning-fork flexural crystal oscillator of the groove A method for manufacturing a crystal unit , comprising: In Claim 1, The said 6th process is made | formed in the order of the said 1st process, The said case is provided with the through-hole, The said case after the said 5th process and before the said 6th process A method of manufacturing a crystal unit , comprising: sealing a through hole of the metal in a vacuum using a metal . 2. The method according to claim 1, wherein the first step to the fifth step are performed in the order of the steps, and the sixth step is performed after the fourth step and before the fifth step. A method of manufacturing a crystal unit. In Claim 1, the said 1st process to the said 5th process are made | formed in the order of the process, the said 6th process is made | formed after the said 4th process and before the said 5th process, and the said case penetrates A method of manufacturing a crystal unit comprising a step of sealing a through hole of the case in a vacuum using a metal after the fifth step of providing a hole and connecting a lid to the case. 4. The case according to claim 1, wherein the case includes a through hole, the step of sealing the through hole of the case in a vacuum using a metal, the step 5 after the fifth step, and And a step of adjusting the frequency of the tuning-fork type bent quartz crystal resonator in a vacuum before the step of sealing the metal in a vacuum using a metal. The second step of forming a groove in each of the first main surface and the second main surface of each of the first crystal tuning fork arm and the second crystal tuning fork arm according to claim 1, A method of manufacturing a crystal unit, comprising the step of forming the groove so that the shape of the groove is a polygonal shape different from a quadrangle in a top view.