CN201995197U

CN201995197U - Printed plate component noise control device

Info

Publication number: CN201995197U
Application number: CN2010206364047U
Authority: CN
Inventors: 凌彬; 许志辉
Original assignee: Sichuan Jiuzhou Electric Group Co Ltd
Current assignee: Sichuan Jiuzhou Electric Group Co Ltd
Priority date: 2010-12-01
Filing date: 2010-12-01
Publication date: 2011-09-28
Anticipated expiration: 2020-12-01

Abstract

The utility model discloses a printed plate component noise control device. The device adopts the principle that a metal shield cover structure is laid on the periphery of a component represented by an AD packaging component with a bottom surface conducting pad, noise produced by the component is conducted to a large-area conducting copper covering layer in an area at the bottom of the metal shield cover through the conducting pad at the bottom of the component, and finally the noise produced by the component is controlled in the metal shield cover, so as to achieve good noise insulation effect.

Description

A kind of printed board level components and parts control device of making an uproar

Technical field

The utility model relates to printed board noise isolation technology, refers more particularly to device layout and the design of noise isolation device in the printed board.

Background technology

Continuous progress along with electronic design technology, the miniaturization of electronic devices and components, microminaturization, highly integrated and little assembling of integrated circuit has caused the noise degree of disturbing mutually of components and parts, assembly constantly to increase the weight of, and the noise isolation design of electronic equipment is faced with stern challenge.Show that according to the study device noise disturbs the influence of electronic equipment particularly importantly mutually, noise is disturbed mutually most of electronic devices and components in the electronic system are produced and is had a strong impact on, and it can cause the function of electronic devices and components to fall effect, and then effect falls in the performance that influences whole electric equipment.Have data to show, in some electronic equipment, noise is disturbed seriously mutually, the reliability that will aggravate electronic equipment.The design of modern electronic equipment noise isolation is in conjunction with electronic equipment telecommunication and actual condition of structure, be aided with the advanced software emulation and the means of noise testing, by selecting suitable isolated form, for electronic equipment creates a good working environment, guarantee the reliable and stable work under the noise that allows of components and parts, complete machine or system.

At present, with the AD with bottom surface conductive pad be representative outside components and parts, be with the packing forms that a large tracts of land exposed pads is come noise isolation, because of having simple, good isolation performance, its application has obtained increasing fast.It is for simply to control disturbing mutually of noise away from noise source, and along with the continual renovation of electronic design technology, device density is also increasing, and the noise that is produced is more and more, and existing device noise isolation method can not satisfy growing needs.

Summary of the invention

The purpose of this utility model provides a kind of noise isolation device, the control that it can effectively the increase printed board ability of making an uproar, and the assurance system can steady operation.

Principle of the present utility model be with the AD with bottom surface conductive pad be encapsulated as representative at components and parts placed around metallic shield cover structure, with the AD device package with bottom surface conductive pad is the structure at components and parts placed around metallic shield of representative, conductive pad by the components and parts bottom, the copper layer is covered in the large-area conduction that the noise that components and parts are produced is transmitted in the metallic shield bottom section, the noise of components and parts generation is controlled in the metallic shield the most at last, to reach good noise isolation effect.

Description of drawings

The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:

Fig. 1 is the exposed AD chip with bottom surface conductive pad of not doing the noise isolation processing of existence conditions;

Fig. 2 is that the cavity of components and parts metallic shield structural cavities vertical view and metallic shield under the utility model employing technology is used and had the AD device schematic diagram one that the copper layer is covered in bottom surface large tracts of land conduction;

Fig. 3 is a metallic shield end view one under the utility model employing technology;

Fig. 4 is a metallic shield end view two under the utility model employing technology;

Fig. 5 is the utility model employing technology figure.

1-1 among Fig. 1 (the electric pad of components and parts), 1-2 (being encapsulated as the exposed conductive pad of a large tracts of land of the device central authorities of representative at AD), 1-3 (the heat radiation via hole that connects conductive pad) with bottom surface conductive pad.

A among Fig. 2 (the electric pad of components and parts), b (being encapsulated as the exposed conductive pad of a large tracts of land of the device central authorities of representative at AD), c among Fig. 2 (metallic shield of components and parts periphery) with bottom surface conductive pad.

Fig. 3 3-1 (printed circuit board) among Fig. 4,3-2 (metallic shield), 3-3 (printed conductor).

4-1 among Fig. 5 (being encapsulated as the exposed conductive pad of a large tracts of land of the device central authorities of representative at AD) with bottom surface conductive pad, 4-2 (being welded on the components and parts of A face), 4-3 (printed board), 4-4 (attachment screw between fixing metal radome and the printed board), 4-5 (metallic shield).

Embodiment

Below in conjunction with accompanying drawing, the utility model is done detailed explanation.

The purpose of this utility model provides a kind of noise isolator, the control that it can effectively the increase PCB ability of making an uproar, and the assurance system is steady operation for a long time, below in conjunction with accompanying drawing, the utility model embodiment is described in further details:

Embodiment is to be with a metal enclosed encapsulating structure with what the AD with bottom surface conductive pad was encapsulated as representative outside components and parts, being transmitted to the A face by the noise in the printing board surface noise source device connects in the metallic shield, the noise of noise source device generation is controlled in the close-connected metallic shield the most at last, so that open with other noise source device isolation, to reach better heat radiating effect.

The utility model package design (as Fig. 2) is compared with encapsulation (as Fig. 1) under the prior art, and identical point is that according to welding requirements, two kinds of packaged device installed surfaces (A face) are identical; Point inequality is, the utility model has designed a metallic shield around the device installed surface, conductive pad by the components and parts bottom, the copper layer is covered in the large-area conduction that the noise that components and parts are produced is transmitted in the metallic shield bottom section, the noise of components and parts generation is controlled in the metallic shield the most at last

The utility model noise isolation mode is compared with noise isolation mode under the prior art, identical point is, the noise source device all is by the exposed conductive pad in bottom, the noise transfer that produces in the work in the components and parts is gone out, difference is, the utility model is controlled noise transfer by device periphery metallic shield amount again and is gone out, thereby the noise between control device is disturbed mutually.The utlity model has very very noisy isolation method, can reach good noise isolation effect.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.

Claims

1. the printed board level components and parts control device of making an uproar is characterized in that this device is provided with a metallic shield around the device installed surface.

2. the printed board level components and parts according to claim 1 control device of making an uproar, comprise the AD device, it is characterized in that this AD device comprises the electric pad of components and parts (a), copper layer (d) is covered in the exposed conductive pad (b) of a large tracts of land, the metallic shield (c) of components and parts periphery, the conduction of device bottom surface large tracts of land that are encapsulated as the device central authorities of representative at the AD with bottom surface conductive pad.