CN202085138U

CN202085138U - Filtering quartz-crystal resonator

Info

Publication number: CN202085138U
Application number: CN2011201609131U
Authority: CN
Inventors: 闵芬娥; 朱春燕; 何敏; 张军
Original assignee: WUHAN HITRUSTY ELECTRONICS CO Ltd
Current assignee: WUHAN HITRUSTY ELECTRONICS CO Ltd
Priority date: 2011-05-18
Filing date: 2011-05-18
Publication date: 2011-12-21
Anticipated expiration: 2021-05-18

Abstract

A filtering quartz-crystal resonator comprises a quartz wafer (1), a support (2) and a casing (3), wherein the quartz wafer (1) is arranged on the support (2), the quartz wafer (1) is in solidifying connection with the support via conducting resin (4), filming layers (1-2), leading tapes (1-3) and dots (1-4) are arranged on the quartz wafer (1), the filming layers (1-2) arranged on two surfaces in the middle of the quartz wafer (1) are of circular shapes, filming layers (1-2) on the two surfaces are respectively connected with the support (2) via the leading tapes (1-3), the filming layers (1-2) are circular electrodes, the dots (1-4) arranged at the periphery of the filming layers (1-2) are parasitic suppression points, and conducting resin (4) is arranged on the dots (1-4). The filtering quartz-crystal resonator directly plates the parasitic suppression points with certain sizes and of certain distances on the quartz wafer in a filming manner, is convenient in processing, and can improve parasitic suppression effect and electrical parameter consistency.

Description

The filtering quartz-crystal resonator

Technical field

The utility model relates to a kind of filtering quartz-crystal resonator.

Background technology

The filtering quartz resonator is compared with common quartz resonator, and two specific (special) requirements are arranged: the 1. amplitude of parasitic frequency and strict requirement is arranged from main distance of shaking; 2. equivalent electric parameter (dynamic inductance, dynamic capacity, direct capacitance) requires to control in the scope that needs.Its basic comprising is: plate silver layer as electrode and leader tape on two corresponding surfaces in the centre position of a quartz wafer, solidify by conducting resinl between wafer and the support and be connected, add package casing and constitute, the central electrode of traditional coating structure is a certain size circular electrode, higher 3～the 5dB of being of quartz-crystal resonator parastic wasp peak value that produces, can only satisfy parasitic inhibition of finished product of common requirement, present new communication suppresses that to parasitism higher requirement is arranged with quartz-crystal filter, requires quartz-crystal resonator parastic wasp peak value≤1dB.Therefore need carry out architecture advances to existing common quartz resonator, to satisfy the needs of new equipment.

Summary of the invention

The purpose of this utility model is to overcome the weak point that parasitism that the conventional plated film of above-mentioned existing quartz-crystal resonator can't satisfy finished product requires, and a kind of filtering quartz-crystal resonator is provided, it can guarantee that the parasitism inhibition parameter of quartz-crystal filter satisfies customer requirements.

The purpose of this utility model reaches by following measure: the filtering quartz-crystal resonator, it comprises quartz wafer, support, shell, quartz wafer is placed on the support, solidify by conducting resinl between quartz wafer and the support and be connected, coatings is arranged on the quartz wafer, leader tape and dot, be positioned at coatings on two faces in centre position on the quartz wafer for circular, coatings on two faces is connected with support by leader tape respectively, coatings is a circular electrode, the dot that is positioned at the coatings periphery is parasitic inhibition point, and conducting resinl is arranged on dot.

In technique scheme, the circumferential distribution of described coatings the dot of Φ 0.5mm, and described coatings is the circular configuration of Φ 1.8mm.

In technique scheme, described dot has five, and the dot of coatings upper end is two-sided symmetric arrangement, and the dot of coatings left end is one and positive the layout, the dot of coatings right-hand member is one and reverse side layout, and the dot that is positioned at the coatings lower end is one and positive the layout.

In technique scheme, the dot of described coatings upper end, coatings left end and coatings right-hand member is 0.25mm apart from coatings, and the dot of coatings lower end is apart from central electrode 0.75mm.

The utility model filtering quartz-crystal resonator has following advantage: 1. with parasitic inhibition point with a certain size, certain distance directly is plated on the wafer by the mode of plated film, and is easy to process, can improve parasitic to suppress effect, and the consistency of electrical quantity.2. adopt the design of plated film auxiliary magnet glue, easy to process, can satisfy production in enormous quantities, practical.

Description of drawings

Fig. 1 is the structural representation of the utility model filtering quartz-crystal resonator.

Fig. 2 is the front arrangement and the size schematic diagram of quartz wafer in the utility model.

Fig. 3 is the reverse side arrangement and the size schematic diagram of quartz wafer in the utility model.

Fig. 4 is conventional plated film parasitic character scintigram.

Fig. 5 is a parasitic character scintigram of the present utility model.

1. quartz wafers among the figure, 2. support, 3. shell, 1-2. coatings, 1-3. leader tape, 1-4. dot, 4. conducting resinl.

Embodiment

Describe performance of the present utility model in detail below in conjunction with accompanying drawing, but they do not constitute to qualification of the present utility model, only do for example.Simultaneously by illustrating that advantage of the present utility model will become clear more and understanding easily.

Consult Fig. 1, Fig. 2, Fig. 3 is as can be known: the utility model filtering quartz-crystal resonator, it comprises quartz wafer 1, support 2, shell 3, quartz wafer 1 is placed on the support 2, solidify by conducting resinl 4 between quartz wafer 1 and the support and be connected, coatings 1-2 is arranged on the quartz wafer 1, leader tape 1-3 and dot 1-4, be positioned at coatings 1-2 on two faces in centre position on the quartz wafer 1 for circular, coatings 1-2 on two faces is connected with support 2 by leader tape 1-3 respectively, coatings 1-2 is a circular electrode, the dot 1-4 that is positioned at coatings 1-2 periphery is parasitic inhibition point, and conducting resinl 4 is arranged on dot 1-4.The circumferential distribution of described coatings 1-2 the dot 1-4 of Φ 0.5mm, and described coatings 1-2 is the circular configuration of Φ 1.8mm.Described dot 1-4 has five, the dot 1-4 of coatings 1-2 upper end is two-sided symmetric arrangement, the dot 1-4 of coatings 1-2 left end is one and positive the layout, the dot 1-4 of coatings 1-2 right-hand member is one and reverse side layout, and the dot 1-4 that is positioned at coatings 1-2 lower end is one and positive the layout.The dot 1-4 of described coatings 1-2 upper end, coatings 1-2 left end and coatings 1-2 right-hand member is 0.25mm apart from coatings 1-2, and the dot 1-4 of coatings 1-2 lower end is apart from central electrode 0.75mm.

As Fig. 4, shown in Figure 5: the utility model filtering quartz-crystal resonator is through the scanning of network analysis instrument, and far-end parastic wasp has clear improvement than conventional electrodes.

The utility model filtering quartz-crystal resonator, in design process, taken into full account the dynamic parameter of product, consider through comprehensive Design, plated film vibration area effective area is selected Φ 1.8mm for use, distributing, parasitic inhibition point and central electrode maintain a certain distance and size, under the situation that assurance product resonant resistance meets the demands, the far-end parasitism is suppressed, consider the actual production problem that drops in the design, guarantee product electrical quantity horizontal stable.

Claims

1. filtering quartz-crystal resonator, it is characterized in that it comprises quartz wafer (1), support (2), shell (3), quartz wafer (1) is placed on the support (2), solidify by conducting resinl (4) between quartz wafer (1) and the support and be connected, coatings (1-2) is arranged on the quartz wafer (1), leader tape (1-3) and dot (1-4), be positioned at quartz wafer (1) and go up coatings (1-2) on two faces in centre position for circular, coatings (1-2) on two faces is connected with support (2) by leader tape (1-3) respectively, coatings (1-2) is a circular electrode, the dot (1-4) that is positioned at coatings (1-2) periphery is parasitic inhibition point, and conducting resinl (4) is arranged on dot (1-4).

2. filtering quartz-crystal resonator according to claim 1 is characterized in that the circumferential distribution of described coatings (1-2) the dot (1-4) of Φ 0.5mm, and described coatings (1-2) is the circular configuration of Φ 1.8mm.

3. according to claim 1 and 2 described filtering quartz-crystal resonators, it is characterized in that described dot (1-4) has five, the dot (1-4) of coatings (1-2) upper end is two-sided symmetric arrangement, the dot (1-4) of coatings (1-2) left end is one and positive the layout, the dot (1-4) of coatings (1-2) right-hand member is one and reverse side layout, and the dot (1-4) that is positioned at coatings (1-2) lower end is one and positive the layout.

4. filtering quartz-crystal resonator according to claim 3, the dot (1-4) that it is characterized in that described coatings (1-2) upper end, coatings (1-2) left end and coatings (1-2) right-hand member is 0.25mm apart from coatings (1-2), and the dot (1-4) of coatings (1-2) lower end is apart from central electrode 0.75mm.