US 11,736,089 B2
Quartz crystal resonator unit and method of manufacturing the same
Hiroshi Ibaragi, Nagaokakyo (JP); and Hiroaki Kaida, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Mar. 5, 2019, as Appl. No. 16/292,871.
Application 16/292,871 is a continuation of application No. PCT/JP2017/032165, filed on Sep. 6, 2017.
Claims priority of application No. 2016-175233 (JP), filed on Sep. 8, 2016.
Prior Publication US 2019/0245512 A1, Aug. 8, 2019
Int. Cl. H03H 9/19 (2006.01); H03H 3/02 (2006.01); H03H 9/05 (2006.01); H03H 9/02 (2006.01); H03H 9/10 (2006.01)
CPC H03H 9/19 (2013.01) [H03H 3/02 (2013.01); H03H 9/02 (2013.01); H03H 9/02086 (2013.01); H03H 9/0509 (2013.01); H03H 9/1021 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A quartz crystal resonator unit comprising:
a base member including a surface and two protruding portions on the surface, at least one of the two protruding portions extending into the base member;
a quartz crystal resonator mounted on the surface of the base member, the quartz crystal resonator including a quartz crystal blank, a pair of excitation electrodes that are disposed on opposed main surfaces of the quartz crystal blank so as to face each other with the quartz crystal blank located there between, and a pair of connection electrodes disposed on the quartz crystal blank and electrically connected to respective ones of the pair of excitation electrodes; and
a lid member having a side wall that extends toward the surface of the base member, the lid member being joined to the surface of the base member via a joining member which covers at least the two protruding portions, the lid member and the base member defining an inner space that accommodates the quartz crystal resonator, at least parts of the joining member that cover at least a portion of the two protruding portions are in contact with the side wall of the lid member so as to restrain movement of the lid member when seen in a plan view in a direction normal to the surface of the base member;
wherein:
the base member includes a base body formed of a first sintered material; and
the two protruding portions are formed of a second sintered material whose sintering shrinkage ratio is smaller than a sintering shrinkage ratio of the base body.