CN206596293U - A kind of SMT printed steel mesh - Google Patents
A kind of SMT printed steel mesh Download PDFInfo
- Publication number
- CN206596293U CN206596293U CN201720273065.2U CN201720273065U CN206596293U CN 206596293 U CN206596293 U CN 206596293U CN 201720273065 U CN201720273065 U CN 201720273065U CN 206596293 U CN206596293 U CN 206596293U
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- steel mesh
- pad
- mesh opening
- width
- opening
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Abstract
The utility model discloses a kind of SMT printed steel mesh, belong to SMT mould plate techniques field, the position corresponding with the pad on PCB to be mounted is provided with steel mesh opening on steel mesh, the PCB is provided with bottom copper sheet/cabling, the pad includes multiple the first pads being laid on the bottom copper sheet/cabling and the second pad being directly laid on the pcb board face, the steel mesh opening corresponding with first pad is the first steel mesh opening, the steel mesh opening corresponding with second pad is the second steel mesh opening, the width of first steel mesh opening is more than the width of second steel mesh opening.It is of the present utility model to solve due to producing the even situation of tin when pad coplane degree difference causes and is coated with tin cream using steel mesh that there is provided the product of better quality.
Description
Technical field
The utility model belongs to SMT mould plate techniques field, and in particular to a kind of SMT processing procedure steel meshes of optimization.
Background technology
With developing rapidly for China's electronics and information products manufacturing, surface mounting technology (SMT, Surface of China
Mount Technology, surface mounting technology) also obtain swift and violent development.Surface mounting technology is a kind of modern circuit
Plate package technique, its technological process is generally included：In printed circuit board (PCB, Printed Circuit Board, in printing
Circuit board) coated on one side tin cream to be welded, the component attachment welded then will be needed to PCB correspondence position, completed
Reflow soldering is carried out after the attachment of component, this completes the attachment of the component of PCB wherein one sides, is after the assay was approved
Surface mount can be completed.
I.e. steel mesh SMT templates, it is a kind of SMT particular manufacturing crafts, and its major function is to aid in the deposition of tin cream, purpose
It is that the tin cream of accurate quantity is transferred to accurate location on sky PCB.In the design of connector steel mesh, there is bottom copper sheet/walk on PCB
Line, because these bottom copper sheet/cabling reasons, the pad ratio on the outside of bottom copper sheet/cabling is located in bottom copper sheet/cabling
The pad of side is low, and pad coplane degree is poor, during using the steel mesh brush tin cream pad tin amount on the outside of bottom copper sheet/cabling can be made to compare position
Pad tin amount on the inside of bottom copper sheet/cabling is more, the company's of easily causing tin, influences PCB using effect.Ladder steel mesh can be right
Template carries out local reduction, to reduce tin amount during particular element welding, but ladder steel mesh complex process, cost is high, uncomfortable
Used together in large-scale promotion.
Utility model content
Technical problem to be solved in the utility model is：A kind of SMT printed steel mesh is provided, using this SMT processing procedure steel mesh
The PCB of print solder paste is not in the bad of even tin, and PCB using effect is good, while this SMT processing procedures steel net structure is simple, system
Make technique easy, cost is low.
In order to solve the above technical problems, the technical solution of the utility model is：
The position corresponding with the pad on PCB to be mounted is opened provided with steel mesh on a kind of SMT printed steel mesh, the steel mesh
Mouthful, the PCB be provided with bottom copper sheet/cabling, the pad include it is multiple be laid on the bottom copper sheet/cabling first
Pad and the second pad being directly laid on the pcb board face, the steel mesh opening corresponding with first pad be
First steel mesh opening, the steel mesh opening corresponding with second pad is the second steel mesh opening, and first steel mesh is opened
The width of mouth is more than the width of second steel mesh opening.
Further, the width of second steel mesh opening is than the small 0.02mm of the first steel mesh opening width, described
The width of one steel mesh opening and second steel mesh opening is respectively less than the width of the pad.
Further, the pad is provided with two rows, and pad described in each row is by first pad and described the
Two pads are constituted.
Further, the center of second steel mesh opening corresponding with second pad positioned at a upper row and institute
State the center superposition of the second pad.
Further, second steel mesh opening corresponding with second pad positioned at next row is centrally located at
The side of first pad of the center of second pad away from same row.
Further, second pad is located at the right side of first pad, with second weldering positioned at next row
Corresponding second steel mesh opening of disk is centrally located at the right side at the center of second pad of same row.
Further, the center and position of second steel mesh opening corresponding with second pad positioned at next row
In same row second pad center in the direction of the width at a distance of 0.03mm.
By adopting the above-described technical solution, the beneficial effects of the utility model are：
The position corresponding with the pad on PCB to be mounted is provided with a kind of SMT printed steel mesh of the present utility model, steel mesh
Steel mesh opening, the steel mesh opening corresponding with the first pad being laid on bottom copper sheet/cabling is the first steel mesh opening, and straight
The corresponding steel mesh opening of the second pad being laid on pcb board face is connect for the second steel mesh opening, the width of the first steel mesh opening
More than the width of the second steel mesh opening.Second steel mesh opening width is less than the width of the first steel mesh opening, so as to be printed onto second
The width of tin cream on pad reduces, it is possible to reduce the tin amount being coated with its correspondence pad, can effectively prevent because of coating tin
Measure excessively and the company's of causing tin, it is ensured that PCB using effect.The utility model SMT processing procedures steel net structure is simple simultaneously, makes work
Skill is easy, and cost is low.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment；
Fig. 2 is the schematic diagram of the utility model embodiment；
In figure, 1- steel meshes, 2- bottoms copper sheet/cabling, the pads of 3- first, the pads of 4- second, the steel mesh openings of 5- first, 6-
Two steel mesh openings.
Embodiment
The utility model is further illustrated with reference to the accompanying drawings and examples.
With reference to shown in Fig. 1 and Fig. 2, a kind of SMT printed steel mesh of the present utility model, with the weldering on PCB to be mounted on steel mesh 1
The corresponding position of disk is provided with steel mesh opening, and PCB is provided with bottom copper sheet/cabling 2, and pad is laid in bottom copper including multiple
The first pad 3 on skin/cabling 2 and the second pad 4 being directly laid on pcb board face, the steel mesh corresponding with the first pad 3
It is open as the first steel mesh opening 5, the steel mesh opening corresponding with the second pad 4 is the second steel mesh opening 6, the first steel mesh opening 5
Width be more than the width of the second steel mesh opening 6, the width of the first steel mesh opening 5 and the second steel mesh opening 6 is respectively less than pad
Width.The width of the present embodiment preferably the second steel mesh opening 6 is than the small 0.02mm of the width of the first steel mesh opening 5.
As shown in Fig. 2 pad is provided with two rows, each row's pad is constituted by the first pad 3 and the second pad 4.The
The center of one steel mesh opening 5 and the center superposition of the first pad 3, second steel corresponding with the second pad 4 positioned at a upper row
The center of net opening 6 and the center superposition of the second pad 4, second steel mesh corresponding with the second pad 4 positioned at next row are opened
Mouth 6 is centrally located at the second pad 4 in the side of the first pad 3 of the center of the second pad 4 away from same row, present embodiment
Positioned at the right side of the first pad 3, the second steel mesh opening of side 6 is centrally located at the right side at the center of the second pad 4.In the present embodiment
It is preferred that the center of the center of second steel mesh opening 6 corresponding with the second pad 4 positioned at next row and corresponding second pad 4
In the direction of the width at a distance of 0.03mm.
For example, the width of pad is 0.23mm in general connector steel mesh is set, then the first steel mesh in present embodiment
A/F a is 0.18mm, and the width b of the second steel mesh opening 6 is that the center spacing c between 0.16mm, adjacent steel mesh opening is
0.4mm, wherein second steel mesh opening 6 and first steel mesh opening 5 of same row corresponding with the second pad 4 positioned at next row
Between center spacing d be 0.43mm.
SMT deficient manufacturing procedures can be substantially reduced by optimization SMT processing procedures steel mesh of the present utility model, can effectively be avoided
Connect tin, it is ensured that PCB using effect, it might even be possible to partial circuit plate design defect is overcome, in combination with simple, manufacture craft
Simplicity, production cost is low.
Although the foregoing describing embodiment of the present utility model, it should be appreciated by those skilled in the art,
Described embodiment is only a part of embodiment of the present utility model, rather than whole embodiments, and these are only to lift
Example explanation, protection domain of the present utility model is to be defined by the appended claims.Those skilled in the art is without departing substantially from this
On the premise of the principle and essence of utility model, pass through no under any performing creative labour, can be to these embodiments
Various changes or modifications are made, but these changes and modification each fall within protection domain of the present utility model.
Claims (7)
1. the position corresponding with the pad on PCB to be mounted is provided with steel mesh opening on a kind of SMT printed steel mesh, the steel mesh,
The PCB is provided with bottom copper sheet/cabling, and the pad includes multiple the first welderings being laid on the bottom copper sheet/cabling
Disk and the second pad being directly laid on the pcb board face, it is characterised in that the steel corresponding with first pad
Net opening is the first steel mesh opening, and the steel mesh opening corresponding with second pad is the second steel mesh opening, described the
The width of one steel mesh opening is more than the width of second steel mesh opening.
2. a kind of SMT printed steel mesh according to claim 1, it is characterised in that the width ratio of second steel mesh opening
The width of the small 0.02mm of first steel mesh opening width, first steel mesh opening and second steel mesh opening is respectively less than institute
State the width of pad.
3. a kind of SMT printed steel mesh according to claim 2, it is characterised in that the pad is provided with two rows, each
The pad is arranged to constitute by first pad and second pad.
4. a kind of SMT printed steel mesh according to claim 3, it is characterised in that with second weldering positioned at a upper row
The center of corresponding second steel mesh opening of disk and the center superposition of second pad.
5. a kind of SMT printed steel mesh according to claim 3, it is characterised in that with second weldering positioned at next row
Corresponding second steel mesh opening of disk is centrally located at first weldering of the center of second pad away from same row
The side of disk.
6. a kind of SMT printed steel mesh according to claim 5, it is characterised in that second pad is located at described first
The right side of pad, second steel mesh opening is centrally located at the right side at the center of second pad.
7. a kind of SMT printed steel mesh according to claim 6, it is characterised in that the center of second steel mesh opening with
The center of second pad is in the direction of the width at a distance of 0.03mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720273065.2U CN206596293U (en) | 2017-03-20 | 2017-03-20 | A kind of SMT printed steel mesh |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720273065.2U CN206596293U (en) | 2017-03-20 | 2017-03-20 | A kind of SMT printed steel mesh |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206596293U true CN206596293U (en) | 2017-10-27 |
Family
ID=60124609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720273065.2U Active CN206596293U (en) | 2017-03-20 | 2017-03-20 | A kind of SMT printed steel mesh |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206596293U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110809375A (en) * | 2019-11-18 | 2020-02-18 | 珠海景旺柔性电路有限公司 | Processing method for solving size expansion and shrinkage of FPC (Flexible printed Circuit) large spliced board in SMT (surface mount technology) printing |
| CN111993768A (en) * | 2020-08-10 | 2020-11-27 | 深圳市华星光电半导体显示技术有限公司 | Steel mesh for printing solder paste, display panel and preparation method thereof |
-
2017
- 2017-03-20 CN CN201720273065.2U patent/CN206596293U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110809375A (en) * | 2019-11-18 | 2020-02-18 | 珠海景旺柔性电路有限公司 | Processing method for solving size expansion and shrinkage of FPC (Flexible printed Circuit) large spliced board in SMT (surface mount technology) printing |
| CN110809375B (en) * | 2019-11-18 | 2021-01-01 | 珠海景旺柔性电路有限公司 | Processing method for solving size expansion and shrinkage of FPC (Flexible printed Circuit) large spliced board in SMT (surface mount technology) printing |
| CN111993768A (en) * | 2020-08-10 | 2020-11-27 | 深圳市华星光电半导体显示技术有限公司 | Steel mesh for printing solder paste, display panel and preparation method thereof |
| CN111993768B (en) * | 2020-08-10 | 2021-09-24 | 深圳市华星光电半导体显示技术有限公司 | Steel mesh for printing solder paste, display panel and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201019 Address after: 261031 north of Yuqing street, east of Dongming Road, high tech Zone, Weifang City, Shandong Province (Room 502, Geer electronic office building) Patentee after: GoerTek Optical Technology Co.,Ltd. Address before: 266104 Laoshan Qingdao District North House Street investment service center room, Room 308, Shandong Patentee before: GOERTEK TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |