Point discharge bonding pad structure and printed circuit board

Abstract

The utility model provides a point discharge pad structure. The point discharge bonding pad structure comprises a substrate; the circuit board comprises a substrate and a discharge pad assembly arranged on the substrate, the discharge pad assembly comprises at least one group of discharge pads, each group of discharge pads comprises a plurality of first discharge pads and a plurality of second discharge pads, the plurality of first discharge pads and the plurality of second discharge pads are oppositely arranged, the first discharge pads are used for being connected to components of the printed circuit board, and the second discharge pads are used for being connected to the components of the printed circuit board. The second discharge pad is used for being connected to the grounding end of the printed circuit board; the first discharge pad is provided with first sharp corner parts, the second discharge pad is provided with second sharp corner parts, each first sharp corner part is opposite to the corresponding second sharp corner part, a discharge gap is formed between each first sharp corner part and the corresponding second sharp corner part, and the discharge gaps are used for electrostatic discharge. The point discharge bonding pad structure enables components on the printed circuit board not to be damaged by static electricity.

Description

Technical Field

[0001] The present disclosure relates to the technical field of printed circuit boards, and in particular to a tip discharge pad structure and a printed circuit board. Background Art

[0002] A printed circuit board is an electronic assembly used to mechanically support and electrically connect electronic components. Printed circuit boards are widely used in computers, mobile phones, medical equipment, automobiles, aerospace and other fields. Printed circuit boards are composed of multiple layers of insulating materials and conductive layers, which are usually made of copper.

[0003] In the prior art, electronic components such as resistors, capacitors, diodes and chips are fixed on a printed circuit board by welding or surface mounting technology to achieve interconnection and conduction of the components.

[0004] However, since static electricity always exists in nature, when the human body or external objects touch the printed circuit board, static discharge is likely to occur. The voltage instantly generated by the static electricity flowing into the components of the printed circuit board can reach tens of thousands of volts, which will directly damage the electronic components on the printed circuit board. Therefore, it is necessary to design an electrostatic protection structure to prevent the components on the printed circuit board from being damaged by static electricity. Utility Model Content

[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and to provide a tip discharge pad structure that prevents components on a printed circuit board from being damaged by static electricity.

[0006] The purpose of this disclosure is achieved through the following technical solutions:

[0007] A tip discharge pad structure, characterized by comprising:

[0008] a substrate; and a discharge pad assembly disposed on the substrate,

[0009] The discharge pad assembly includes at least one group of discharge pads, each group of discharge pads includes a plurality of first discharge pads and a plurality of second discharge pads, and the plurality of first discharge pads are arranged opposite to the plurality of second discharge pads;

[0010] The first discharge pad has a first sharp corner portion, and the second discharge pad has a second sharp corner portion.

[0011] Each of the first pointed corners is disposed opposite to a second pointed corner, and each of the first pointed corner and a second pointed corner forms a discharge gap, and the discharge gap is used for electrostatic discharge.

[0012] In one embodiment, the first discharge pad and the second discharge pad are in a triangle or diamond shape.

[0013] In one embodiment, the shapes of the first discharge pad and the second discharge pad are isosceles triangles, and the first sharp corner portion and the second sharp corner portion are vertices of the isosceles triangles.

[0014] In one embodiment, the angle range of the first sharp corner portion and the second sharp corner portion is 20° to 75°.

[0015] In one embodiment, the first pointed corner portion and the second pointed corner portion are conductive medium layers.

[0016] In one embodiment, the conductive medium layer is a copper layer.

[0017] In one embodiment, the conductive medium layer is an aluminum layer.

[0018] In one embodiment, the distance of the discharge gap is 75 μm to 150 μm.

[0019] In one of the embodiments, the distance of the discharge gap is 120 μm.

[0020] A printed circuit board comprises the tip discharge pad structure described in any one of the above embodiments.

[0021] Compared with the prior art, the present invention has at least the following advantages:

[0022] Since the discharge pad assembly includes at least one group of discharge pads, each group of discharge pads includes a plurality of first discharge pads and a plurality of second discharge pads, and the plurality of first discharge pads are arranged opposite to the plurality of second discharge pads; the first discharge pad has a first sharp corner, and the second discharge pad has a second sharp corner, and each second sharp corner is arranged opposite to a first sharp corner, and each second sharp corner forms a discharge gap with a first sharp corner, and the discharge gap is used for static electricity discharge, the first discharge pad is used to connect to the components of the printed circuit board, and the second discharge pad is used to connect to the ground terminal of the printed circuit board, when static electricity flows in from the input terminal, using Tip discharge effect: the greater the curvature of the conductor surface, the stronger the electric field strength. Therefore, the charge brought by static electricity will gather at the first sharp corner of the first discharge pad connected to the components. At this time, the first sharp corner gathers a large amount of charge, causing the electric field strength of the first sharp corner to increase dramatically, causing the dielectric of the discharge gap between the first sharp corner and the second sharp corner to be broken down, thereby transferring the charge from the first sharp corner to the second sharp corner of the second discharge pad, thereby guiding the static electricity to the second discharge pad. The second discharge pad is used to connect to the ground terminal of the printed circuit board, so that the static electricity is released from the ground terminal, thereby avoiding the damage of static electricity to components. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 FIG. 4 is a schematic structural diagram of a tip discharge pad structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] The present disclosure provides a pointed discharge pad structure, which includes a substrate; and a discharge pad assembly arranged on the substrate, the discharge pad assembly including at least one group of discharge pads, each group of discharge pads including a plurality of first discharge pads and a plurality of second discharge pads, the plurality of first discharge pads and the plurality of second discharge pads are arranged opposite to each other, the first discharge pads are used to connect to components of a printed circuit board, and the second discharge pads are used to connect to a ground terminal of the printed circuit board; the first discharge pad has a first sharp corner portion, the second discharge pad has a second sharp corner portion, each first sharp corner portion is arranged opposite to a second sharp corner portion, each first sharp corner portion and a second sharp corner portion form a discharge gap, and the discharge gap is used for electrostatic discharge.

[0029] The above-mentioned pointed discharge pad structure has a discharge pad assembly including at least one group of discharge pads, each group of discharge pads including a plurality of first discharge pads and a plurality of second discharge pads, the plurality of first discharge pads are arranged opposite to the plurality of second discharge pads; the first discharge pad has a first sharp corner, the second discharge pad has a second sharp corner, each second sharp corner is arranged opposite to a first sharp corner, each second sharp corner and a first sharp corner form a discharge gap, the discharge gap is used for electrostatic discharge, the first discharge pad is used to connect to the components of the printed circuit board, the second discharge pad is used to connect to the ground terminal of the printed circuit board, when static electricity flows from the input terminal When entering, using the tip discharge effect, the greater the curvature of the conductor surface, the stronger the electric field strength. Therefore, the charge brought by static electricity will gather at the first sharp corner of the first discharge pad connected to the component. At this time, the first sharp corner gathers a large amount of charge, causing the electric field strength of the first sharp corner to increase sharply, so that the dielectric of the discharge gap between the first sharp corner and the second sharp corner is broken down, thereby transferring the charge from the first sharp corner to the second sharp corner of the second discharge pad, thereby guiding the static electricity to the second discharge pad. The second discharge pad is used to connect to the ground terminal of the printed circuit board, so that the static electricity is released from the ground terminal, thereby avoiding the damage of static electricity to the components.

[0030] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0031] like Figure 1 As shown, a pointed discharge pad structure 10 of an embodiment includes a substrate 100; and a discharge pad assembly 200 disposed on the substrate 100, the discharge pad assembly 200 includes at least one group of discharge pads 210, each group of discharge pads 210 includes a plurality of first discharge pads 211 and a plurality of second discharge pads 212, the plurality of first discharge pads 211 and the plurality of second discharge pads 212 are arranged opposite to each other, the first discharge pads 211 are used to connect to the components 20 of the printed circuit board, and the second discharge pads 212 are used to connect to the ground terminal 50 of the printed circuit board; the first discharge pad 211 has a first sharp corner portion 211a, the second discharge pad 212 has a second sharp corner portion 212a, each first sharp corner portion 211a is arranged opposite to a second sharp corner portion 212a, each first sharp corner portion 211a and a second sharp corner portion 212a form a discharge gap 220, and the discharge gap 220 is used for electrostatic discharge. In this embodiment, the plurality of first discharge pads 211 and the plurality of second discharge pads 212 are arranged in a one-to-one alignment.

[0032] The above-mentioned pointed discharge pad structure is that the discharge pad assembly 10 includes at least one group of discharge pads 210, each group of discharge pads 210 includes a plurality of first discharge pads 211 and a plurality of second discharge pads 212, and the plurality of first discharge pads 211 are arranged opposite to the plurality of second discharge pads 212; the first discharge pad 211 has a first sharp corner 211a, and the second discharge pad 212 has a second sharp corner 212a, and each second sharp corner 212a is arranged opposite to a first sharp corner 211a, and each second sharp corner 212a and a first sharp corner 211a form a discharge gap 220, and the discharge gap 220 is used for electrostatic discharge, the first discharge pad 211 is used to connect to the component 20 of the printed circuit board, and the second discharge pad 212 is used to connect to the ground terminal 50 of the printed circuit board. When When static electricity flows in from the input terminal 40, the greater the curvature of the conductor surface, the stronger the electric field strength is, and therefore the charge brought by the static electricity will gather at the first sharp corner portion 211a of the first discharge pad 211 connected to the component 20. At this time, the first sharp corner portion 211a gathers a large amount of charge, causing the electric field strength of the first sharp corner portion 211a to increase sharply, so that the dielectric of the discharge gap 220 between the first sharp corner portion 211a and the second sharp corner portion 212a is broken down, thereby transferring the charge from the first sharp corner portion 211a to the second sharp corner portion 212a of the second discharge pad 212, thereby guiding the static electricity to the second discharge pad 212. The second discharge pad 212 is used to be connected to the ground terminal 50 of the printed circuit board, so that the static electricity is released from the ground terminal 50, thereby avoiding the damage of the static electricity to the component 20.

[0033] like Figure 1 As shown, in one embodiment, the shape of the first discharge pad 211 and the second discharge pad 212 is a triangle or a rhombus. In this embodiment, the triangle or the rhombus is a simple shape with a sharp corner, which is conducive to the formation of the first discharge pad 211 and the second discharge pad 212, and the sharp corner is conducive to the occurrence of the tip discharge phenomenon.

[0034] like Figure 1 As shown, in one embodiment, the shapes of the first discharge pad 211 and the second discharge pad 212 are specifically isosceles triangles, and the first sharp corner 211a and the second sharp corner 212a are the apex angles of the isosceles triangles. In this embodiment, the isosceles triangle is conducive to the formation of the first discharge pad 211 and the second discharge pad 212.

[0035] like Figure 1As shown, in one embodiment, the angle range of the first sharp corner portion 211a and the second sharp corner portion 212a is 20° to 75°. In this embodiment, the angle range of the first sharp corner portion 211a and the second sharp corner portion 212a is 20° to 75°, so that the angle of the first sharp corner portion 211a and the second sharp corner portion 212a is an acute angle, which is more conducive to the occurrence of the tip discharge phenomenon.

[0036] like Figure 1 As shown, in one embodiment, the first sharp corner portion 211a and the second sharp corner portion 212a are conductive dielectric layers. In this embodiment, the first sharp corner portion 211a and the second sharp corner portion 212a are conductive dielectric layers, so that static electricity can be transferred from the input end to the ground end 50 through the conductive dielectric layer.

[0037] like Figure 1 As shown, in one embodiment, the conductive medium layer is a copper layer. In this embodiment, the conductive medium layer is a copper layer so that the first discharge pad 211 and the second discharge pad 212 have better conductivity.

[0038] like Figure 1 As shown, in one embodiment, the conductive medium layer is an aluminum layer. In this embodiment, the conductive medium layer is an aluminum layer so that the first discharge pad 211 and the second discharge pad 212 have better conductivity.

[0039] like Figure 1 As shown, in one embodiment, the distance of the discharge gap 220 is 75 μm to 150 μm. In this embodiment, the distance of the discharge gap 220 is 75 μm to 150 μm. Within this spacing range, it is beneficial for the charges accumulated in the first sharp corner 211a to be released to the second sharp corner 212a under the tip discharge effect.

[0040] like Figure 1 As shown, in one embodiment, the distance of the discharge gap 220 is 120 μm. In this embodiment, the distance of the discharge gap 220 is 120 μm, which is more conducive to the charge accumulated in the first sharp corner 211a to be released to the second sharp corner 212a under the tip discharge effect.

[0041] The present disclosure further provides a printed circuit board, comprising the tip discharge pad structure 10 according to any one of the above embodiments.

[0042] Compared with the prior art, the present invention has at least the following advantages:

[0043] Since the discharge pad assembly 10 includes at least one group of discharge pads 210, each group of discharge pads 210 includes a plurality of first discharge pads 211 and a plurality of second discharge pads 212, and the plurality of first discharge pads 211 are arranged opposite to the plurality of second discharge pads 212; the first discharge pad 211 has a first sharp corner 211a, and the second discharge pad 212 has a second sharp corner 212a, and each second sharp corner 212a is arranged opposite to a first sharp corner 211a, and each second sharp corner 212a and a first sharp corner 211a form a discharge gap 220, and the discharge gap 220 is used for electrostatic discharge, the first discharge pad 211 is used to be connected to the component 20 of the printed circuit board, and the second discharge pad 212 is used to be connected to the ground terminal 50 of the printed circuit board, when static electricity is discharged from the input terminal When the current 40 flows in, the tip discharge effect is utilized. The greater the curvature of the conductor surface, the stronger the electric field strength. Therefore, the charges brought by the static electricity will be gathered at the first sharp corner portion 211a of the first discharge pad 211 connected to the component 20. At this time, the first sharp corner portion 211a gathers a large amount of charges, resulting in a sharp increase in the electric field strength of the first sharp corner portion 211a, so that the dielectric of the discharge gap 220 between the first sharp corner portion 211a and the second sharp corner portion 212a is broken down, thereby transferring the charges from the first sharp corner portion 211a to the second sharp corner portion 212a of the second discharge pad 212, thereby guiding the static electricity to the second discharge pad 212. The second discharge pad 212 is used to be connected to the ground terminal 50 of the printed circuit board, so that the static electricity is released from the ground terminal 50, thereby avoiding the damage of the static electricity to the component 20.

[0044] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A tip discharge pad structure, characterized in that: include: substrate; and a discharge pad assembly disposed on the substrate, The discharge pad assembly includes at least one group of discharge pads, each group of discharge pads includes a plurality of first discharge pads and a plurality of second discharge pads, the plurality of first discharge pads and the plurality of second discharge pads are arranged opposite to each other, the first discharge pads are used to connect to components of a printed circuit board, and the second discharge pads are used to connect to a ground terminal of the printed circuit board; The first discharge pad has a first sharp corner portion, and the second discharge pad has a second sharp corner portion. Each of the first pointed corners is disposed opposite to a second pointed corner, and each of the first pointed corner and a second pointed corner forms a discharge gap, and the discharge gap is used for electrostatic discharge.

2. The tip discharge pad structure according to claim 1, characterized in that: The first discharge pad and the second discharge pad are in a triangle or diamond shape.

3. The tip discharge pad structure according to claim 2, characterized in that: The shapes of the first discharge pad and the second discharge pad are specifically isosceles triangles, and the first sharp corner portion and the second sharp corner portion are vertex angles of the isosceles triangles.

4. The tip discharge pad structure according to claim 3, characterized in that: The angle range of the first sharp corner portion and the second sharp corner portion is 20 to 75 degrees.

5. The tip discharge pad structure according to claim 1, characterized in that: The first pointed corner portion and the second pointed corner portion are conductive medium layers.

6. The tip discharge pad structure according to claim 5, characterized in that: The conductive medium layer is a copper layer.

7. The tip discharge pad structure according to claim 5, characterized in that: The conductive medium layer is an aluminum layer.

8. The tip discharge pad structure according to claim 1, characterized in that: The distance of the discharge gap is 75 μm to 150 μm.

9. The tip discharge pad structure according to claim 8, characterized in that: The distance of the discharge gap is 120 μm.

10. A printed circuit board, characterized in that: The invention comprises the tip discharge pad structure according to any one of claims 1 to 9.

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