公开(公告)号：US6031319A

公开(公告)日：2000-02-29

申请号：US38040

申请日：1998-03-11

申请人： Mitsuaki Koyama ,  Shigenori Watanabe ,  Tadashi Tamiya ,  Keisuke Miyashita ,  Chiaki Kato ,  Shuzi Osawa

发明人： Mitsuaki Koyama ,  Shigenori Watanabe ,  Tadashi Tamiya ,  Keisuke Miyashita ,  Chiaki Kato ,  Shuzi Osawa

IPC分类号： H03H9/05 ,  H03H9/19 ,  H01L41/053

CPC分类号： H03H9/177 ,  H03H9/0528 ,  H03H9/19

摘要： A quartz crystal element in which unwanted response is suppressed, comprising a thickness shear quartz blank such as an AT-cut type. An area where an amplitude of unwanted response may be strong can be eliminated from the quartz blank by forming the quartz blank into a substantially hexagon. Preferably, each pair of three pairs of opposite sides are mutually parallel and one of the pairs is parallel to the longest diagonal line of the quartz blank. For an AT-cut type of quartz crystal element, the direction of the longest diagonal line of the quartz blank is within the range of 28.degree..+-.15.degree. or 118.degree..+-.15.degree. from the Z' axis direction of the quartz blank, and the quartz blank is held at the ends of the longest diagonal line.

摘要翻译： 其中抑制不希望的响应的石英晶体元件，包括诸如AT切割型的厚度剪切石英坯。 可以通过将石英坯料形成为大致六边形，从石英坯料中消除不需要的响应幅度可能很强的区域。 优选地，每对三对相对侧彼此平行，并且其中一对与石英坯的最长对角线平行。 对于AT切割型石英晶体元件，石英片最长对角线的方向在距离Z轴方向的28°±15°或118°±15°的范围内 石英坯，石英坯保持在最长对角线的端部。