rectangular at cut quarzelement, quarzschwinger, quarzschwingereinheit and quarzoszillator and process for the production of quarzelements

摘要

The aspect ratio (w/t) of the quartz plate at which no coupling with spurious vibrations occurs within the operating temperature range even when the width and length of the quartz plate below 1.5 mm and below 4.7 mm, respectively, is specified. It has been experimentally confirmed that an AT-cut rectangular quartz plate having an aspect ratio of 8.48 +/- 0.05, 12.18 +/- 0.05, 13.22 +/- 0.07, 14.78 +/- 0.07, or 15.57 +/- 0.07 has excellent temperature characteristics. In addition, several factors which are essential to providing a quartz plate having a low equivalent series resistance have been found.