CN202242290U - Printing steel screen with combined openings - Google Patents
Printing steel screen with combined openings Download PDFInfo
- Publication number
- CN202242290U CN202242290U CN2011204020699U CN201120402069U CN202242290U CN 202242290 U CN202242290 U CN 202242290U CN 2011204020699 U CN2011204020699 U CN 2011204020699U CN 201120402069 U CN201120402069 U CN 201120402069U CN 202242290 U CN202242290 U CN 202242290U
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- perforate
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- pore opening
- steel screen
- printing
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Abstract
The utility model relates to a printing steel screen with combined openings. The printing steel screen with the combined openings is made by taking the conventional screen frame and fixed sheet steel process of a printing steel screen as basis, taking PCB (Printed Circuit Board) data files as support data, and adopting different pore opening manners and even sheet steels of different thicknesses; the adopted opening manners comprise a concave pore opening manner, a convex pore opening manner, a Chinese character 'tian'-shaped pore opening manner and a multi-point circular array pore opening manner; and according to the specifications of a component and the self thickness of the component, the sheet steels are subjected to pore opening by locally thickening and thinning. According to the utility model, the problem of unfavorable printing arising from an inappropriate printing steel screen is solved, and the welding quality is improved. The most significant advantage is that: the pore opening manners commonly used in the industry for the steel screen are changed, different pore opening manners are adopted aiming at different components, and the printing steel screen with high printing quality is provided by combining combined pore opening manners with a layout thickening technology.
Description
Technical field
The utility model relates to employed printed steel mesh in a kind of electronic product welding manufacture process.
Background technology
In the electronic product manufacturing, the technology that generally adopts at present is a reflow solder technique.Reflow soldering mainly is made up of three technologies: soldering paste printing, portion's article mount, welding automatically.
Perfect along with industry technology, multiple surface mount elements (SMC) and mount the appearance and the popularization and application of device (SMD), solder reflow process is adopted widely.Simultaneously, the appearance of auxiliary equipment and compound solder reflow process, solder reflow process has begun to replace original wave-soldering connection technology, and is current, and this technology is used in the TV manufacturing industry.
The popularization and application of solder reflow process, corresponding technology requires increasingly high.In the main technique technology of reflow soldering, the soldering paste typography directly has influence on weld strength and welding plumpness, is defined as the special procedure in the solder reflow process in industry.Its particularity is because the soldering paste press quality has determined the welding quality of product.And the welding quality of electronic product has directly with the reliability of product itself and to get in touch.
Printed steel mesh is the crucial means of production of decision press quality; The technology of printed steel mesh is along with repeatedly change has been experienced in the development of manufacturing process technology; From the etch to laser, carve, arrive laser electropolishing etc. again, the perforate mode is also from meeting bond pad shapes to " V " " M " type etc.; Through the change of steel mesh manufacturing process, a lot of quality problem have been solved.But raising day by day along with the complexity of electronic product; The development prospect of the electronic product of multifunctional all particularly; Caused the used electronic circuit board of electronic product complicated portion's article in process to constitute, original perforate mode can not corresponding complicated electronic manufacture course of products demand.Very easily produce the tin ball, float, qualities such as off normal and rosin joint are heavily owed.
Summary of the invention
The utility model is in order to solve that manufacturing that present printed steel mesh can not satisfy product requires and the printed steel mesh of a kind of combined type perforate of designing, thereby requirement is made in the welding of satisfying electronic product.
The utility model is that the technical scheme that its technical problem of solution is adopted is:
With the screen frame of the printed steel mesh of routine and fixedly steel disc technology be the basis, serve as the support data with the PCB data file, to portion's article of different complicacies and specification, adopt different perforate modes even adopt different steel plate thickness to process printed steel mesh.
The perforate mode that is adopted is matrix perforate, convex perforate, field type perforate, the perforate of multiple spot circular array;
The matrix perforate: be applicable to standard 2125 to 3216 interval portion article, when portion's article thickness surpassed 0.8mm, the perforate recessed portion increased by 15%～40% open cell content.More original its advantage of V-type perforate of spill perforate is to reduce when melting, the ultra scope off normal of portion's article that scolding tin flows and causes.
Convex perforate: be applicable to 0402 article, small-sized leading part article.
Field type perforate: large-scale portion's article that earth electrode is arranged, bottom are that the LED portion article of heat dissipation design are fit to adopt.
Multiple spot circular array perforate: be suitable for the large-scale portion's article that are designed with via pad.It act as keeps away the hole, reduces the tin quantity not sufficient that scolding tin causes through through hole.
Local thickening or reduce the thickness perforate: change according to portion's article specification and portion's article self thickness.Be best suited for adjacent closely spaced article.
The beneficial effect of the utility model is: solved because the unsuitable printing that is caused of printed steel mesh is bad, improved welding quality.Be to have changed the steel mesh perforate mode that generally adopts in the industry the most significantly, to the different perforate mode of different portions article employing, the technology that combines layout to thicken with knockdown perforate mode provides the printed steel mesh of high press quality.
Description of drawings
Below in conjunction with accompanying drawing and concrete embodiment the utility model is done further description.
Accompanying drawing 1 is the plane of the utility model printed steel mesh.
Among the figure: 1, matrix perforate, 2, the convex perforate, 3, field type perforate, 4, the perforate of multiple spot circular array.
The specific embodiment
Specify the utility model below in conjunction with embodiment.
The printed steel mesh of combined type perforate; With the screen frame of the printed steel mesh of routine and fixedly steel disc technology be the basis; With the PCB data file serves as to support data, to portion's article of different complicacies and specification, adopts different perforate modes even adopts different steel plate thickness to process printed steel mesh.The perforate mode that is adopted is matrix perforate 1, convex perforate 2, field type perforate 3, multiple spot circular array perforate 4; Local thickening or reduce the thickness perforate: change according to portion's article specification and portion's article self thickness.Adopt the standard screen frame that is suitable in the industry, the fixing suitable high-strength nylon material of steel disc is bonding.The steel plate thickness specification constitutes and can in 0.11mm～0.2mm scope, select according to PCB portion article.Carving the hole adopts laser beam drilling and is suitable for the electropolishing marginal technology.To increase the smoothness of perforate, reduce solder residue at verge of opening.
According to the PCB data, need to confirm the accurate coordinate value of perforate, confirm each other through portion's article specifications and portion's article pad that carries out the PCB correspondence position in kind again.The perforate standard is:
0402 specification and small leading part article, the convex perforate mode of employing pad size 110%, the selection of pad 110% is to decide because of the composition smallest particles of scolder, the percent of pass from printed steel mesh when making solder printing reaches best.The scolder that pressure caused when convex perforate 2 modes can be stopped portion's article and adorning is scattered and the soldered ball that forms.1 of matrix perforate is portion's article of corresponding 2125 above specifications, when self thickness of portion's article is above standard, and the increasing of concave port selectivity.Field type perforate 3 is the portion's article to large-scale earth electrode, during welding, receives the tram of assurance portion article in the scolder of thawing.The pad of via design, the most suitable employing multiple spot circular array perforate 4 modes are kept away the hole, to improve welding quality and precision.The specification of the formation of joint portion article and portion's article self, local thickening or minimizing are must replenish the perforate mode.
Combined type perforate printed steel mesh, its final purpose are to reach under the prerequisite of welding requirements in other welding condition, expend the minimum a kind of effective quality control technology of cost.Not only guaranteed the press quality requirement, the reliability of welding this special procedure and goods has been had the raising of very big degree.
The utility model is not limited to the foregoing description, and any equivalent concepts in the technical scope that the utility model discloses perhaps changes, and all classifies the protection domain of the utility model as.
Claims (1)
1. the printed steel mesh of a combined type perforate is characterized in that: with the screen frame of the printed steel mesh of routine and fixedly steel disc technology be the basis, serve as the support data with the PCB data file, adopt different perforate modes even adopt different steel plate thickness to process; The perforate mode that is adopted comprises matrix perforate, convex perforate, field type perforate, the perforate of multiple spot circular array;
Described matrix perforate is used for standard 2125 to 3216 interval portion article, and when portion's article thickness surpassed 0.8mm, the perforate recessed portion increased by 15%～40% open cell content;
Described convex perforate is used for 0402 article of standard, small-sized leading part article;
The type perforate of described field is used for large-scale portion's article that earth electrode is arranged, and the bottom is the LED portion article of heat dissipation design;
The perforate of described multiple spot circular array is used for the large-scale portion's article that are designed with via pad;
According to portion's article specification and portion's article self thickness, the local thickening of steel disc, the perforate of minimizing thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204020699U CN202242290U (en) | 2011-10-11 | 2011-10-11 | Printing steel screen with combined openings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204020699U CN202242290U (en) | 2011-10-11 | 2011-10-11 | Printing steel screen with combined openings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202242290U true CN202242290U (en) | 2012-05-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204020699U Expired - Fee Related CN202242290U (en) | 2011-10-11 | 2011-10-11 | Printing steel screen with combined openings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202242290U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103085452A (en) * | 2013-02-04 | 2013-05-08 | 无锡帝科电子材料科技有限公司 | Screen printing plate for silicon solar cell silver paste printing experiment |
| CN104439599A (en) * | 2014-12-12 | 2015-03-25 | 绵阳市容富电子科技有限公司 | Automatic soldering tool |
| CN106714472A (en) * | 2017-01-18 | 2017-05-24 | 对松堂电子（苏州）有限公司 | Steel mesh process |
-
2011
- 2011-10-11 CN CN2011204020699U patent/CN202242290U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103085452A (en) * | 2013-02-04 | 2013-05-08 | 无锡帝科电子材料科技有限公司 | Screen printing plate for silicon solar cell silver paste printing experiment |
| CN104439599A (en) * | 2014-12-12 | 2015-03-25 | 绵阳市容富电子科技有限公司 | Automatic soldering tool |
| CN106714472A (en) * | 2017-01-18 | 2017-05-24 | 对松堂电子（苏州）有限公司 | Steel mesh process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20131011 |