CN202773181U - Circuit board - Google Patents

Abstract

The utility model relates to the technical field of the design of wireless terminal signal transmission, and particularly relates to a circuit board. The circuit board of the utility model comprises a first surface, a second surface, a signal line and a connection mechanism. The first surface is connected with the second surface, the signal line is arranged between the first surface and the second surface, the connection mechanism is a through hole which runs through the first surface and the second surface, and the signal line is connected with the first surface through the through hole. Compared with the prior art, in the circuit board having a through hole structure of the utility model, a blind hole is replaced with the through hole because the blind hole has a complex and unstable fabrication process, so the circuit board is easy and convenient to use, and at the same time, a high-precision laser machine is required in the blind hole fabrication process and only a mechanical rig is required in the through hole fabrication process, so the cost is reduced.

Description

A kind of circuit board

Technical field

The utility model relates to the design field of wireless terminal signal transmission, particularly a kind of circuit board.

Background technology

Antenna is a kind of device that utilizes frequency characteristic to receive and transmit.In recent years, be used for design and the performance of the mobile terminal antenna of radio communication, more and more affect the developing direction of mobile communication.Particularly portable mobile termianl such as mobile phone, PDA(Personal Digital Assistance), MP3/MP4.Several leading indicators of Antenna Design are: suitable multifrequency resonance is arranged, antenna realize that signal is propagated and energy emission all based on the resonance of certain frequency.If antenna can both resonance in a plurality of frequencies, antenna can be in a plurality of frequency work so.

In recent years, more and more wireless terminals adopt the structural design of low section.The thickness that is to say terminal is more and more less, and " thin " is the target that a lot of mobile phones are pursued.In order to reach this target, a lot of mobile phones have adopted the pcb board design of discrete, namely adopt two pcb boards to lay respectively at the two ends of mobile phone, we can refer to wherein one with mainboard, the above has radio-frequency module usually, and platelet refers to other one, and the above has some simple connections and match circuit.Platelet top is antenna normally.The very thin coaxial line of diameter connects platelet and mainboard, is used for radiofrequency signal is directed on the platelet from mainboard.The diameter of coaxial line is less, and the loss on the unit length is larger.But, because the space integrated level of mobile phone is more and more higher, require to use the as far as possible coaxial line of minor diameter.This just in time is contradiction with reducing loss.How in the situation that do not increase loss, reducing as much as possible the shared space of this section coaxial line, is the challenge that we face.In recent years, realize that with microstrip line transmission line is a possible selection.The shielding of signal has problem for the semi-open structure of signal but microstrip line is one, easily produces the interference of signal.The transmission line of realizing with strip lines configuration is a good selection.Holding wire is positioned at the centre on two-layer ground, and signal has obtained good shielding, is not easy to produce to disturb.On the other hand, for the stability of radio-frequency performance and manufacturing, the width of holding wire generally is not less than 0.1 millimeter.This just has certain requirement to the thickness of strip line.And connection radio frequency connector and strip line need to design via hole, and the common via hole here is the blind hole that connects holding wire and surface conductor, and namely via hole just passes the thickness of part strip line.The thickness of strip line is thicker, and the making of blind hole is more difficult, can have a strong impact on the yield of product.As shown in Figure 5, the positive end view of blind hole conducting.Blind hole 8 coupling parts 52 and part 61.Part 61 connects holding wire 6.There is certain restriction in manufacturing of blind hole 8, and R/h must meet some requirements, and in order to reach reliable and stable conducting, R/h must be greater than 0.9.But because R can not be large arbitrarily, for example be subjected to the restriction of dimensional space.So at this time, h is necessary can not be too large, that is to say, the height in hole is that certain restriction is arranged, and for example h is no more than 50 microns.And the making in hole need to be used laser machine, and cost is high.

The utility model content

The utility model purpose is to provide a kind of circuit board, adopted in the blind hole conducting technology at circuit board to solve in the prior art, use the manufacturing process of inconvenience and blind hole very difficult and unstable, ratio especially high to the hole and radius limits to some extent, so that have to use the high-precision laser machine in the drilling process, cause production process technical matters with high costs.

The utility model purpose is achieved through the following technical solutions:

A kind of circuit board, comprise first surface, second surface, holding wire and bindiny mechanism, described first surface is connected with second surface, described holding wire is arranged between described first surface and the second surface, described bindiny mechanism is the through hole that runs through described first surface and described second surface, and described holding wire is connected with described first surface by described through hole.

Preferably, described first surface comprises ground one and non-ground one, and described ground one is arranged on same plane with non-ground one, and does not link to each other, and described through hole is arranged on the described non-ground one.

Preferably, described holding wire comprises the extension that is connected to the one end, and described through hole is arranged on the described extension.

Preferably, described second surface comprises ground two and non-ground two, and described ground two is arranged on same plane with non-ground two, and does not link to each other, and described through hole is arranged on the described non-ground two.

Preferably, described ground one and ground two are connected by connecting hole.

Preferably, described through-hole wall scribbles conducting medium.

Preferably, described connecting hole inwall scribbles conducting medium.

Compared with prior art, the utility model has following beneficial effect:

A kind of circuit board of the present utility model is because the numerous and diverse and unsteadiness of original blind hole manufacture craft, use through hole instead and replace blind hole, make circuit board in use easily with convenient, need high-precision laser machine because blind hole is made simultaneously, through hole is made only needs machine dimensions drill, thus Cost reduction.

Description of drawings

Fig. 1 is the front view of a kind of circuit board of the present utility model;

Fig. 2 is the top view of a kind of circuit board of the present utility model;

Fig. 3 is the bottom view of a kind of circuit board of the present utility model;

Fig. 4 is the positive end view of a kind of circuit board of the present utility model;

Fig. 5 is with the positive end view of the circuit board of blind hole structure in the prior art.

Embodiment

Below in conjunction with accompanying drawing, further introduce the utility model.

Please refer to accompanying drawing 1-4, a kind of circuit board comprises first surface, second surface, holding wire 2 and bindiny mechanism, and described first surface is connected by bindiny mechanism with second surface, and described holding wire 2 is arranged between first surface, the second surface.Wherein, bindiny mechanism comprises through hole 4, and through hole 4 runs through first surface and second surface, and holding wire is connected with first surface by through hole, and in addition, through hole 4 inwalls scribble conducting medium, so that through hole 4 plays the wire effect.

First surface comprises ground 1 and non-ground 1, and ground 1 is with one 12 isolation of non-ground and at same plane, and non-ground 1 is connected with through hole 4; Second surface comprises ground 2 31 and non-ground 2 32, and ground 2 31 is with 2 32 isolation of non-ground and at same plane, and non-ground 2 32 is connected with described through hole 4.Wherein one with ground two ground wires that refer to have electrical characteristic.

Holding wire 2 also comprises the extension 21 that is connected to the one end, and extension 21 connects with through hole 4 and is connected, and at this moment, non-ground 1, non-ground 2 32 have passed through through hole 4 electrical connections together with extension 21.Because ground 1 has identical electrical characteristic with ground 2 31, thus one 11 can be connected by connecting hole 5 with ground 2 31, connecting hole 5 inwalls also scribble conducting medium.

Comprehensive above-mentioned embodiment as can be known, a kind of circuit board of the present utility model is because the numerous and diverse and unsteadiness of original blind hole manufacture craft, use through hole instead and replace blind hole, make circuit board in use easily with convenient, because making, blind hole needs high-precision laser machine simultaneously, through hole is made only needs machine dimensions drill, thus Cost reduction.

Above disclosed only be several specific embodiments of the application, but the application is not limited thereto, the changes that any person skilled in the art can think of all should drop in the application's the protection range.

Claims (7)

1. circuit board, it is characterized in that, comprise first surface, second surface, holding wire and bindiny mechanism, described first surface is connected by bindiny mechanism with second surface, described holding wire is arranged between described first surface and the second surface, described bindiny mechanism is the through hole that runs through described first surface and described second surface, and described holding wire is connected with described first surface by described through hole.

2. a kind of circuit board as claimed in claim 1 is characterized in that, described first surface comprises ground one and non-ground one, and described ground one is arranged on same plane with non-ground one, and does not link to each other, and described through hole is arranged on the described non-ground one.

3. a kind of circuit board as claimed in claim 2 is characterized in that, described holding wire comprises the extension that is connected to the one end, and described through hole runs through described extension.

4. a kind of circuit board as claimed in claim 3 is characterized in that, described second surface comprises ground two and non-ground two, and described ground two is arranged on same plane with non-ground two, and does not link to each other, and described through hole is arranged on the described non-ground two.

5. a kind of circuit board as claimed in claim 4 is characterized in that, described ground one and ground two are connected by connecting hole.

6. a kind of circuit board as claimed in claim 1 is characterized in that, described through-hole wall scribbles conducting medium.

7. a kind of circuit board as claimed in claim 5 is characterized in that, described connecting hole inwall scribbles conducting medium.

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