CN202151006U

CN202151006U - Printed circuit board fabricating board

Info

Publication number: CN202151006U
Application number: CN201120279955U
Authority: CN
Inventors: 葛春
Original assignee: Peking University Founder Group Co Ltd; Zhuhai Founder Technology Multilayer PCB Co Ltd
Current assignee: Peking University Founder Group Co Ltd; Zhuhai Founder Technology Multilayer PCB Co Ltd
Priority date: 2011-08-03
Filing date: 2011-08-03
Publication date: 2012-02-22
Anticipated expiration: 2021-08-03

Abstract

The embodiment of the utility model relates to the printed circuit board technology field, and especially relates to a printed circuit board fabricating board. The printed circuit board fabricating board includes a printed circuit main board, cutting lines around the printed circuit main board, at least one technological edge with a side border being the cutting line, and at least two testing pads which are used to detect whether or not the technological edges are cut, wherein the two testing pads are arranged on the same technological edge, and are connected with each other via a lead. The lead has an intersection point with the cutting line arranged on the side border of the technological edge. The printed circuit board fabricating board provided by the embodiment can improve the accuracy of the anti-omission detection and the qualified rate of the printed circuit board.

Description

A kind of printed circuit board (PCB) is in making sheet

Technical field

The utility model relates to the printed-board technology field, and particularly a kind of printed circuit board (PCB) is in making sheet.

Background technology

At present, PCB (Printed Circuit Board, printed circuit board (PCB)) adopts V-CUT excision forming mode; When producing PCB in a large number,, need detect the V-CUT line of cut whether omission is arranged before the cutting in order to ensure the integrality of cutting; The mode that detects comprises following dual mode: one, Manual Visual Inspection, and operator must carefully be checked drawing and plate in kind, but the pcb board area is bigger; The V-CUT line of cut is many, Manual Visual Inspection inefficiency and easy error, the problem of generation false retrieval or omission; Two, adopt ET (Electric Test, Electronic Testing) mode; As shown in Figure 1, on the adjacent technology limit 11 of PCB mainboard 10 testing weld pad 12 is set respectively, and connects through lead 13; In the ET process; Testing weld pad is applied voltage, if short circuit shows that then cutting is accomplished here between two testing weld pads, otherwise here line of cut by omission.

In order to enhance productivity,, use PCB the machine automatic chip mounting to replace welding manually in producing.In order to satisfy machine automatic chip mounting arts demand, as shown in Figure 1, all be designed with above-mentioned technology limit 11 around the PCB mainboard 10,, paster helps out when handling, and it does not influence the PCB electric property, and after paster is accomplished, goes out of use.Based on the needs of practicing thrift cost, PCB layout design is changed to the technology limit design of independent process limit (wall scroll) or two opposite side by conventional frame formula technology limit design (four limits are all surrounded by the technology limit).As shown in Figure 2, PCB mainboard 10 relative both sides have technology limit 11 (certainly, also can have only wall scroll technology limit) respectively.Owing to reduced the bar number on technology limit, thereby reduced the area that goes out of use, and then reached the purpose that reduces cost.

But, reduce the technology limit and cause existing V-CUT to detect and can't realize, cause the V-CUT omission, and then make wiring board scrap.

The utility model content

A kind of printed circuit board (PCB) that the utility model embodiment provides can improve the leakproof accuracy in detection of line of cut in making sheet, improves the qualification rate of printed circuit board (PCB).

The utility model embodiment provides a kind of printed circuit board (PCB) in making sheet, comprising:

The printed circuit mainboard;

Be positioned at said printed circuit mainboard line of cut on every side;

At least one technology limit, a lateral edges on said technology limit are a said line of cut;

Be used to detect at least two testing weld pads whether cut on said technology limit, wherein two testing weld pads are positioned at same technology limit, and link to each other through a lead; The line of cut of said lead and said technology limit one lateral edges has intersection point.

Preferable, said testing weld pad number is during greater than two, the bar number greater than one lead in, at least one lead and said line of cut have intersection point.

Preferable, said lead is curved.

Preferable, said lead is the U font.

Preferable, said lead is V-shape.

Preferable, said lead and said line of cut intersect.

Preferable, said lead and said line of cut are tangent.

The printed circuit board (PCB) that the utility model embodiment provides is in making sheet; The testing weld pad that uses lead to connect is set on the same technology limit, and this lead has intersection point with line of cut, after the cutting operation completion; Through detecting the whether conducting of this lead; Detect whether this line of cut place has accomplished cutting, can improve the leakproof accuracy in detection of line of cut thus, improve the qualification rate of printed circuit board (PCB).

Description of drawings

Fig. 1 is a technology limit position view in the prior art;

Fig. 2 is an another kind of technology limit position view in the prior art;

Fig. 3 be among the utility model embodiment printed circuit board (PCB) at the structural representation of making sheet;

Fig. 4 be among another embodiment of the utility model printed circuit board (PCB) at the structural representation of making sheet;

Fig. 5 a-Fig. 5 b is that the position of lead and line of cut concerns sketch map among the utility model embodiment;

Fig. 6 a-Fig. 6 b is the shape sketch map of lead among the utility model embodiment;

Fig. 7 a-Fig. 7 c is that the position of lead and line of cut concerns sketch map when having two above testing weld pads among the utility model embodiment.

Embodiment

Below in conjunction with Figure of description the utility model embodiment is described in further detail.

The utility model embodiment provides a kind of printed circuit board (PCB) in making sheet, and as shown in Figure 3, it specifically comprises:

Printed circuit mainboard 1; Be positioned at printed circuit mainboard 1 line of cut 2 on every side;

At least one technology limit 3, a lateral edges on said technology limit 3 are a said line of cut 2;

Be used to detect at least two testing weld pads 4 whether cut on said technology limit 3, wherein two testing weld pads 4 are positioned at same technology limit 3, and link to each other through a lead 5; Said lead 5 has intersection point with the line of cut 2 of said technology limit 3 one lateral edges.

Above-mentioned printed circuit board (PCB) is in making sheet, accomplish and after PCB processed, the pad on technology limit and the technology limit can not appear on the PCB that processes in cutting, so can be on the basis that guarantees PCB production qualification rate material-saving more, and do not influence client's user demand.

Concrete, whether cut at line of cut 2 places in order accurately to detect, on same technology limit 3, at least two testing weld pads 4 are set, wherein have two testing weld pads 4 to connect, and this lead 5 have intersection point with line of cut 2 through a lead 5.Preferable, testing weld pad 4 numbers are greater than 2 o'clock, the bar number greater than one lead 5 in, at least one lead 5 has intersection point with line of cut 2.Preferable, this lead 5 is curved, and for example lead 5 is the U font; This lead 5 also can be V-shape.

Preferable, this lead 5 intersects with line of cut 2, also can be tangent with line of cut 2.

The testing weld pad 4 that uses lead 5 to connect is set on same technology limit 3,, detects whether these line of cut 2 places have accomplished cutting through detecting whether conducting of this lead 5.

After technology limit 3 is provided with testing weld pad 4, according to normal flow printed circuit board (PCB) is cut in making sheet, after the cutting; For fear of omitting cutting, can connect through a lead and this lead applies voltage respectively with the testing weld pad 4 that line of cut 2 has intersection point, be conducting state if detect between the testing weld pad 4; Explain that then this line of cut 2 is omitted; If detecting between the testing weld pad 4 is off-state, explain that then this line of cut 2 is not omitted, cut along this line of cut 2.

Through foregoing description, can find out that the printed circuit board (PCB) that the utility model embodiment provides is in making sheet; Use lead to connect the test welded disc, and this lead have intersection point with line of cut, after the cutting operation completion; Through detecting the whether conducting of this lead; Detect whether this line of cut place has accomplished cutting, can improve the leakproof accuracy in detection of line of cut thus, improve the qualification rate of printed circuit board (PCB).

Through specific embodiment the printed circuit board (PCB) that the utility model provides is elaborated in making sheet below; As shown in Figure 4; Have a line of cut 2 around the printed circuit mainboard 1, it is the technology limit 3 at edge that relative both sides have respectively with line of cut 2, i.e. the first technology limit 31 and the second technology limit 32.On the first technology limit 31, have two testing weld pads 4, and connect through a lead 51.Shown in Fig. 5 a, this lead 51 is the U font, and this lead 51 has two intersection points with line of cut 2.Certainly, can also be tangent like this lead 51 of Fig. 5 b with this line of cut 2, only have an intersection point.On the second technology limit 32, have two testing weld pads 4, and connect through a lead 52.Shown in Fig. 6 a, this lead 52 is V-shape, and this lead 52 has two intersection points with line of cut 2.Certainly, can also be the arbitrary curve shape like this lead of Fig. 6 b, and tangent with this line of cut 2, only have an intersection point.After the technology limit is provided with testing weld pad, printed circuit board (PCB) is cut in making sheet according to normal flow.Lead and line of cut be 2 tangent, only have under the situation of an intersection point, and during along line of cut 2 cuttings, this intersection point place is cut off, and causes this lead to break off at this intersection point place.

After the cutting; For fear of omitting cutting, can connect through a lead and this lead applies voltage respectively with the testing weld pad 4 that line of cut 2 has intersection point, be conducting state if detect between the testing weld pad 4; Explain that then this line of cut 2 is omitted; If detecting between the testing weld pad 4 is off-state, explain that then this line of cut 2 is not omitted, cut along this line of cut 2.

The number of above-mentioned testing weld pad 4 can many leads 5 possibly occur under the situation like this greater than two.Wherein, Have at least a lead 5 and line of cut 2 to have intersection point, shown in Fig. 7 a, have 3 testing weld pads 4 on the same technology limit; First testing weld pad 41 and second testing weld pad 42 are through 51 conductings of first lead, and second testing weld pad 42 and the 3rd testing weld pad 43 are through 52 conductings of first lead.First lead 51 intersects with line of cut 2, and second lead 52 does not have intersection point with line of cut 2.Also can all have intersection point by every lead 5 with line of cut 2; Shown in Fig. 7 b; Have 3 testing weld pads, 4, the first testing weld pads 41 and second testing weld pad 42 on the same technology limit through 51 conductings of first lead, second testing weld pad 42 and the 3rd testing weld pad 43 are through 52 conductings of first lead.First lead 51 intersects with line of cut 2, and second lead 52 is tangent with line of cut 2.Perhaps, shown in Fig. 7 c, first lead 51 intersects with line of cut 2, and second lead 52 also intersects with line of cut 2.

According to 2 pairs of printed circuit board (PCB)s of line of cut before making sheet is cut, can test the connection between this testing weld pad 4, determine whether conducting, to avoid producing flase drop.

After technology limit 3 is provided with testing weld pad 4; According to normal flow printed circuit board (PCB) is cut in making sheet, after the cutting, for fear of omitting cutting; Can apply voltage respectively at the testing weld pad 4 that connects through lead and this lead and line of cut 2 have an intersection point; For example among Fig. 7 a, lead and line of cut 2 between testing weld pad 41 and the testing weld pad 42 have intersection point, and lead and line of cut 2 between testing weld pad 42 and the testing weld pad 43 do not have intersection point; When then testing after the cutting, testing weld pad 41 and testing weld pad 42 are applied voltage respectively; Among Fig. 7 b and Fig. 7 c; Lead and line of cut 2 between testing weld pad 41 and the testing weld pad 42 have intersection point; Lead and line of cut 2 between testing weld pad 42 and the testing weld pad 43 also have intersection point, when then testing after the cutting, can in three testing weld pads 4, choose two wantonly and apply voltage.Being conducting state between the testing weld pad 4 if detect, explaining that then this line of cut 2 is omitted, is off-state if detect between the testing weld pad 4, explains that then this line of cut 2 is not omitted, and cuts along this line of cut 2.

Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from the spirit and the scope of the utility model.Like this, belong within the scope of the utility model claim and equivalent technologies thereof if these of the utility model are revised with modification, then the utility model also is intended to comprise these changes and modification interior.

Claims

1. a printed circuit board (PCB) is characterized in that in making sheet, comprising:

The printed circuit mainboard;

Be positioned at said printed circuit mainboard line of cut on every side;

2. printed circuit board (PCB) as claimed in claim 1 is characterized in that in making sheet, and said testing weld pad number is greater than 2 o'clock, the bar number greater than one lead in, at least one said lead and said line of cut have intersection point.

3. printed circuit board (PCB) as claimed in claim 1 is characterized in that in making sheet said lead is curved.

4. printed circuit board (PCB) as claimed in claim 3 is characterized in that in making sheet said lead is the U font.

5. printed circuit board (PCB) as claimed in claim 1 is characterized in that in making sheet said lead is V-shape.

Like claim 3,4 or 5 described printed circuit board (PCB)s in making sheet, it is characterized in that said lead and said line of cut intersect.

Like claim 3,4 or 5 described printed circuit board (PCB)s in making sheet, it is characterized in that said lead and said line of cut are tangent.