Oscillator characteristics testing method

Abstract

The signals with same frequencies but different amplitude, are applied multiple times from a network analyzer 6) to an oscillator chip (4) through the electrodes (2,3). The corresponding outputs of the oscillator chip are measured and stored in memory of personal computer (1). The stored results are compared so as to determine whether the oscillator chip is conforming or not conforming item.

Description

technical field [0001] The present invention relates to a vibration characteristic test method of a crystal vibrator or a ceramic vibrator. Background technique [0002] Crystal resonators or ceramic resonators are generally manufactured as follows. [0003] First, a crystal or ceramic piece (hereinafter referred to as "oscillator piece") is cut out from the crystal or processed such as sintering, and then ground to a predetermined external dimension and thickness. [0004] Next, metal is vapor-deposited on the vibrator piece to form electrodes, and after adjusting the deposition amount and fine-tuning the vibration frequency of the vibrator, it is accommodated in a predetermined package to complete the process. [0005] If there are cracks, defects, damage, etc. on the vibrator piece before metal evaporation, when the electric power applied to the manufactured vibrator changes, abnormal changes in crystal impedance or frequency fluctuations may occur. [0006] In addition...

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Problems solved by technology

[0006] In addition, if the frequency is greatly adjusted by increasing the amount of vapor deposition during metal vapor deposition, in addition to prolonging the vapor deposition time and reducing productivity, there is also the possibility of an abnormal increase in crystal impedance or an aging change due to peeling of the vapor deposited metal.

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