阅读说明：本技术 一种电路板显示器连接器的钢网及制备方法 (Steel mesh of circuit board display connector and preparation method thereof ) 是由 蒋海华 于 2019-09-24 设计创作，主要内容包括：本发明提出了一种电路板显示器连接器的钢网,包括钢网本体,包括第一分段和第二分段；第一分段为靠近钢网内侧的分段；第二分段为远离钢网内侧的分段；且第一分段的长度小于第二分段的长度；第一分段与第二分段之间的间距小于焊盘宽度；钢网的宽度大于焊盘的宽度；焊盘边到钢网的距离小于焊盘宽度；钢网超出焊盘的长度小于焊盘的宽度。本发明对钢网采用分段处理,首先经过印刷锡膏,其次显示器连接器贴装,最后锡膏经过高温融化焊接凝固,在锡膏融化时相邻的焊盘上的锡不会连接,从而避免固化后形成连锡不良。本发明还给出了钢网的制备方法,依据设计的钢网方案进行编程切割,精度要求在0.01mm。切割后要进行抛光处理。(The invention provides a steel mesh of a circuit board display connector, which comprises a steel mesh body, a first section and a second section, wherein the steel mesh body comprises a first section and a second section; the first section is a section close to the inner side of the steel mesh; the second section is a section far away from the inner side of the steel mesh; and the length of the first section is less than the length of the second section; the distance between the first section and the second section is smaller than the width of the bonding pad; the width of the steel mesh is larger than that of the bonding pad; the distance from the edge of the pad to the steel mesh is smaller than the width of the pad; the length of the steel mesh exceeding the bonding pad is smaller than the width of the bonding pad. The method adopts sectional treatment on the steel mesh, firstly, the tin paste is printed, secondly, the display connector is pasted, and finally, the tin paste is melted at high temperature, welded and solidified, so that the tin on the adjacent bonding pads can not be connected when the tin paste is melted, and poor tin connection after solidification is avoided. The invention also provides a preparation method of the steel mesh, programming cutting is carried out according to the designed steel mesh scheme, and the precision requirement is 0.01 mm. Polishing is performed after cutting.)

1. The steel mesh of the circuit board display connector is characterized by comprising a steel mesh body, wherein the steel mesh body is provided into two sections and comprises a first section and a second section; the first section is a section close to the inner side of the steel mesh; the second section is a section far away from the inner side of the steel mesh; and the length of the first section is less than the length of the second section; the distance between the first section and the second section is smaller than the width of the bonding pad;

the width of the steel mesh is larger than that of the bonding pad; the distance from the edge of the pad to the steel mesh is smaller than the width of the pad; the length of the steel mesh exceeding the bonding pad is smaller than the width of the bonding pad.

2. A steel mesh for a circuit board display connector as claimed in claim 1, wherein the distance between the first and second segments is equal to 1.5 times the distance from the edge of the pad to the steel mesh.

3. A steel mesh for a circuit panel display connector as claimed in claim 1, wherein the first section of the steel mesh has a rounded configuration; the second section of the steel mesh is of a round angle structure.

4. A steel mesh for a circuit panel display connector as claimed in claim 1, wherein the width of the steel mesh is equal to 1.1 to 1.3 times the width of the bonding pad.

5. A steel mesh for a circuit board display connector as claimed in claim 1, wherein the distance from the pad edge to the steel mesh is equal to 0.5 to 0.8 times the width of the pad.

6. A steel net for a circuit board display connector according to claim 1, wherein the distance between the first section and the second section is equal to 0.6 to 0.9 times the width of the bonding pad.

7. A steel net for a circuit board display connector according to claim 1, wherein the length of the first section is equal to 0.2 to 0.4 times the length of the pad.

8. A steel mesh for a circuit board display connector as claimed in claim 1, wherein the second section has a length equal to the length of the pad-the distance from the edge of the pad to the steel mesh-the length of the first section-the distance between the first and second sections + the length of the steel mesh beyond the pad.

9. A method for preparing a steel mesh of a circuit board display connector is characterized by comprising the following steps:

cutting a steel mesh body according to any one of claims 1 to 8;

and (6) polishing.

10. The method for preparing a steel mesh for a circuit board display connector according to claim 9, wherein the cutting the steel mesh body according to any one of claims 1 to 8 comprises:

cutting the steel mesh body according to any one of the claims 1-8 with a cutting accuracy of 0.01 mm.

Technical Field

The invention belongs to the technical field of circuit board processing and production, and particularly relates to a steel mesh of a circuit board display connector and a preparation method thereof.

Background

With the rapid development of the IT industry, almost all electronic devices need to be supported by PCBA (Printed circuit board + Assembly), and the development trend of server performance is fast in processing speed and large in storage capacity. The requirements on the display connector are more precise, the size of the display connector is smaller and smaller, the requirements on the display connector in a welding process are higher and higher, and a steel mesh (stents), namely an SMT Stencil (SMT Stencil), is a special SMT mould. Its primary function is to aid in the deposition of solder paste in order to transfer the correct amount of solder paste to the correct location on the empty PCB.

In the PCBA processing process, the display connector is often poor in continuous tin, difficult to maintain and prone to causing scrapping of the PCBA.

Disclosure of Invention

The invention provides a steel mesh of a circuit board display connector and a preparation method thereof.

In order to achieve the above object, the present invention provides a steel mesh for a circuit board display connector, comprising a steel mesh body, wherein the steel mesh body is provided in two sections, including a first section and a second section; the first section is a section close to the inner side of the steel mesh; the second section is a section far away from the inner side of the steel mesh; and the length of the first section is less than the length of the second section; the distance between the first section and the second section is smaller than the width of the bonding pad;

the width of the steel mesh is larger than that of the bonding pad; the distance from the edge of the pad to the steel mesh is smaller than the width of the pad; the length of the steel mesh exceeding the bonding pad is smaller than the width of the bonding pad.

Further, the distance between the first section and the second section is equal to 1.5 times of the distance from the edge of the welding disk to the steel mesh.

Further, the first section of the steel mesh is of a round angle structure; the second section of the steel mesh is of a round angle structure.

Further, the width of the steel net is equal to 1.1 to 1.3 times of the width of the pad.

Further, the distance from the edge of the pad to the steel mesh is equal to 0.5 to 0.8 times the width of the pad.

Further, the spacing between the first segment and the second segment is equal to 0.6 to 0.9 times the pad width.

Further, the length of the first segment is equal to 0.2 to 0.4 times the length of the bonding pad.

Further, the length of the second section is equal to the length of the pad, the distance from the edge of the pad to the steel mesh, the length of the first section, the distance between the first section and the second section and the length of the steel mesh exceeding the pad.

A steel mesh preparation method of the connector of the circuit board display, cut out the steel mesh of the connector of a circuit board display, and polish and process;

furthermore, the cutting precision is required to be 0.01 mm.

Drawings

Fig. 1 is a schematic diagram showing a pad in a steel mesh of a connector for a circuit board display according to embodiment 1 of the present invention;

fig. 2 is a schematic diagram showing a steel mesh design of a circuit board display connector according to embodiment 1 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.