Grooved piezoelectric resonating element and a mounting therefore
First Claim
1. A piezoelectric resonating element comprising:
- (a) a piezoelectric plate (2) having an elongated rectangular shape with first and second major flat surfaces, said piezoelectric plate (2) formed with an elongated groove (3) on said first major flat surface extending in an lengthwise direction of said piezoelectric plate (2) to separate said first major flat surface into first and second lands;
(b) a first electrode (6) deposited on said first land;
(c) a second electrode (7) deposited on said second land; and
(d) a third electrode (12) deposited entirely on said second major flat surface.
1 Assignment
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Accused Products
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).
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Citations
13 Claims
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1. A piezoelectric resonating element comprising:
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(a) a piezoelectric plate (2) having an elongated rectangular shape with first and second major flat surfaces, said piezoelectric plate (2) formed with an elongated groove (3) on said first major flat surface extending in an lengthwise direction of said piezoelectric plate (2) to separate said first major flat surface into first and second lands; (b) a first electrode (6) deposited on said first land; (c) a second electrode (7) deposited on said second land; and (d) a third electrode (12) deposited entirely on said second major flat surface. - View Dependent Claims (2)
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3. A piezoelectric resonating element comprising:
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(a) a piezoelectric plate (2) having an elongated rectangular shape of length L and first and second major flat surfaces, said piezoelectric plate formed with an elongated groove (3) on said first major flat surface extending in an lengthwise direction of said piezoelectric plate and additional grooves (4,
5) intercepting said elongated groove (3) at 1/3 of length L from the center of the first major flat surface to separate said first major flat surface into six lands;(b) a first electrode (6) deposited on one of two lands enclosed by said additional grooves (4,
5);(c) a second electrode (7) deposited on other of two lands enclosed by said additional grooves (4,
5); and(d) a third electrode (12) deposited entirely on said second major flat surface. - View Dependent Claims (4)
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5. A piezoelectric resonating device comprising:
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(a) a piezoelectric resonating element (1) comprising; (i) a pieozoelectric plate (2) having an elongated rectangular shape with first and second major flat surfaces, said piezoelectric plate formed with an elongated groove (3) on said first major flat surface extending in an lengthwise direction of said piezoelectric plate to separate said first major flat surface at least into first and second lands; (ii) a first electrode (6) deposited on said first land; (iii) a second electrode (7) deposited on said second land; and (iv) a third electrode (12) deposited entirely on said second major flat surface (b) a base (14) for supporting said piezoelectric resonating element (1); (c) first, second and third terminal means having one ends connected to said first, second and third electrodes, respectively, and other ends extending outwardly from said base in the same direction; (d) a casing (18) defined by first and second major walls (18a and 18b) placed in face-to-face relation with each other and a side wall (18c, 18d, 18e) surrounding said major walls but leaving a section thereof to define a cavity (33) in said casing with an opening (32) at the side of said casing, said base (14), piezoelectric resonating element (1) and first, second and third terminal means being placed inside said casing (18) with said other ends of first, second and third terminal means being extending outwardly from said casing through said opening (32); and (e) a sealant (35) applied at said opening (32) for closing said casing (18). - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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Specification