Grooved piezoelectric resonating element and a mounting therefore
US4431938A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1982 |
| Grant date | Feb 14, 1984 |
| Priority date | — |
| Expiry date | Dec 3, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/562
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A piezoelectric resonating element includes a piezoelectric plate (2) having an elongated rectangular shape with first and second major flat surfaces. The piezoelectric plate (2) is formed with an elongated groove (3) on the first major flat surface extending in an lengthwise direction of the piezoelectric plate (2) to separate the first major flat surface into first and second lands. A first electrode (6) is deposited on the first land, and a second electrode (7) is deposited on the second land. A third electrode (12) is deposited entirely on the second major flat surface. A dicing saw is used to form the groove and cut out the element from a mother piece. A piezoelectric resonating device employs the piezoelectric resonating element and it includes a base (14) for supporting the piezoelectric resonating element (1), first, second and third terminals connected to the element (1) for the external connection, a casing (18) for receiving the base (14), piezoelectric resonating element (1) and first, second and third terminals, and a sealant (35) applied at at an opening (32) of the casing (18).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.