CN214796951U - Multifunctional insulating sheet - Google Patents

Abstract

The utility model relates to a multifunctional insulating sheet, which comprises an aluminum foil glass fiber cloth layer, a polyimide layer and a heat-conducting silica gel layer, wherein the aluminum foil glass fiber cloth layer comprises an aluminum foil layer and a glass fiber cloth layer, the surface of the aluminum foil layer is provided with an aluminum plating convex layer, the polyimide layer completely covers the aluminum plating convex layer and the aluminum foil layer, and the polyimide layer is connected with the aluminum foil layer into a whole; the surface on glass fibre cloth layer is provided with the magnetic screen layer, heat conduction silica gel layer covers the magnetic screen layer completely and heat conduction silica gel layer is connected as an organic whole with the magnetic screen layer. The multifunctional insulating sheet has the functions of insulation, heat conduction, electromagnetic shielding, water resistance and the like, and has the advantages of various functions, wide application and good implementation effect.

Description

Multifunctional insulating sheet

Technical Field

The utility model relates to a multifunctional insulating piece belongs to insulating piece technical field.

Background

The insulating sheet is widely used in the electric appliance and electronic industry, and the product plays roles of insulation, separation and the like.

The conventional insulating sheet is generally made of an insulating material, such as a PI insulating sheet, a PET insulating sheet, a PP insulating sheet, a PC insulating sheet, a PVC insulating sheet, and the like.

The insulating sheets have excellent insulating properties, but have a single function. In the existing electrical and electronic industries, the general use environment is variable, if the heat dissipation consideration is taken, the general insulating sheet still needs to have certain heat conductivity, and the insulating sheet made of the insulating material has lower heat dissipation performance and can not meet the use requirement.

Reducing electromagnetic interference is an industry challenge that requires continuous optimization if it is in the field of communications. The conventional insulating sheet has a single structure and generally does not have the electromagnetic interference resistance or electromagnetic shielding function. In addition, some outdoor devices in the communication field are arranged in the open air, and in order to reduce the influence of humidity on electronic instruments, the outdoor devices also require waterproof or moisture-proof requirements on some insulating sheets. And on current market, do not have concurrently function insulating piece in an organic whole such as insulating, heat conduction, electromagnetic shield, waterproof, all be insulating piece cooperation waterproof cloth, electromagnetic shielding membrane etc. carry out the multilayer winding usually, not only the installation is troublesome, and bonding strength between each other is limited, simultaneously because there is the installation clearance each other for whole installation thickness is great.

SUMMERY OF THE UTILITY MODEL

The utility model discloses not enough to prior art exists provides a multi-functional insulating piece, and concrete technical scheme is as follows:

a multifunctional insulating sheet comprises an aluminum foil glass fiber cloth layer, a polyimide layer and a heat-conducting silica gel layer, wherein the aluminum foil glass fiber cloth layer comprises an aluminum foil layer and a glass fiber cloth layer, an aluminum-plated convex layer is arranged on the surface of the aluminum foil layer, the aluminum-plated convex layer and the aluminum foil layer are completely covered by the polyimide layer, and the polyimide layer and the aluminum foil layer are connected into a whole; the surface on glass fibre cloth layer is provided with the magnetic screen layer, heat conduction silica gel layer covers the magnetic screen layer completely and heat conduction silica gel layer is connected as an organic whole with the magnetic screen layer.

As an improvement of the above technical solution, the aluminum-plated bump layer includes a plurality of first aluminum-plated bump groups arranged at equal intervals along the length direction of the aluminum foil layer, and the first aluminum-plated bump groups include a plurality of first aluminum-plated bumps arranged at equal intervals along the width direction of the aluminum foil layer; a second aluminum-plated protrusion group is arranged between two adjacent first aluminum-plated protrusion groups, and comprises a plurality of second aluminum-plated protrusions which are arranged at equal intervals along the width direction of the aluminum foil layer; the first aluminum-plated protrusions and the second aluminum-plated protrusions are arranged in a staggered mode.

As an improvement of the above technical solution, the magnetic shielding layer includes a nickel plating layer disposed on a surface of the glass fiber cloth layer, a plurality of sets of third aluminum plating protrusion sets disposed at equal intervals along a length direction of the aluminum foil layer are disposed on the surface of the nickel plating layer, and the third aluminum plating protrusion sets include a plurality of third aluminum plating protrusions disposed at equal intervals along a width direction of the aluminum foil layer; a fourth aluminum-plated protrusion group is arranged between two adjacent third aluminum-plated protrusion groups, and comprises a plurality of fourth aluminum-plated protrusions which are arranged at equal intervals along the width direction of the aluminum foil layer; the third aluminum-plated bumps and the fourth aluminum-plated bumps are arranged in a staggered manner.

As an improvement of the above technical solution, the first aluminum plating protrusion and the second aluminum plating protrusion are both elliptical, and the third aluminum plating protrusion and the fourth aluminum plating protrusion are both elliptical.

As an improvement of the technical scheme, an included angle between the long axis direction of the first aluminum-plated protrusion and the long axis of the second aluminum-plated protrusion is alpha, and alpha is more than or equal to 60 degrees and less than or equal to 120 degrees; the included angle between the long axis direction of the third aluminum-plated protrusion and the long axis of the fourth aluminum-plated protrusion is beta, and beta is more than or equal to 60 degrees and less than or equal to 120 degrees.

As a modification of the above-described embodiment, α ═ β ═ 90 °.

As an improvement of the technical scheme, a first blank area is arranged between the side edge of the aluminum foil layer and the side edge of the glass fiber cloth layer, and a first wavy or zigzag protruding structure is further arranged on the side edge of the aluminum foil layer; a second white space is arranged between the side edge of the nickel plating layer and the side edge of the glass fiber cloth layer, and a second wavy or zigzag protruding structure is further arranged on the side edge of the nickel plating layer.

Multifunctional insulation piece has functions such as insulating, heat conduction, electromagnetic shield, waterproof, and the function is various, and the usage is extensive, implements effectually.

Drawings

Fig. 1 is a schematic structural view of the multifunctional insulating sheet of the present invention;

fig. 2 is a schematic structural view of the aluminum foil glass fiber cloth layer of the present invention;

FIG. 3 is a schematic view of the connection between the aluminum foil glass fiber cloth layer and the aluminum plated bump layer according to the present invention;

fig. 4 is a schematic view of the connection between the glass fiber cloth layer and the magnetic shielding layer of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1 and 2, the multifunctional insulating sheet includes an aluminum foil glass fiber cloth layer 10, a polyimide layer 20, and a heat conductive silica gel layer 30, wherein the aluminum foil glass fiber cloth layer 10 includes an aluminum foil layer 12 and a glass fiber cloth layer 11, an aluminum-plated protrusion layer 50 is disposed on a surface of the aluminum foil layer 12, the polyimide layer 20 completely covers the aluminum-plated protrusion layer 50 and the aluminum foil layer 12, and the polyimide layer 20 is integrally connected to the aluminum foil layer 12; the surface of the glass fiber cloth layer 11 is provided with a magnetic shielding layer 60, the heat conduction silica gel layer 30 completely covers the magnetic shielding layer 60, and the heat conduction silica gel layer 30 is connected with the magnetic shielding layer 60 into a whole.

In the present embodiment, the polyimide layer 20 has better mechanical strength and better insulation performance than the thermal conductive silicone layer 30. But the thermal conductivity of the polyimide layer 20 is very poor. The aluminum foil glass fiber cloth layer 10 is made of aluminum foil glass fiber cloth through optimized design. The aluminum foil glass fiber cloth, namely the aluminum foil composite glass fiber cloth, is prepared by compounding an aluminum foil and glass fiber cloth (glass fiber cloth), wherein the glass fiber cloth can be 1080 type electronic grade glass fiber cloth, for example 1080 type aluminum foil composite glass fiber cloth of Shandong Zhongyixin engineering materials Co., Ltd. The aluminum foil composite glass fiber cloth has large longitudinal and transverse tensile strength, air impermeability, good waterproof sealing performance and fire resistance grade: class V-0-non-combustible, implementation standard GB8624-2006, german standard DIN4102a 1.

The aluminum foil glass fiber cloth layer 10, the polyimide layer 20 and the heat-conducting silicon adhesive layer 30 are compounded by hot pressing, so that the aluminum foil glass fiber cloth layer, the polyimide layer and the heat-conducting silicon adhesive layer are connected into a whole. The aluminum foil glass fiber cloth can obviously improve the mechanical strength of the insulating sheet, including tensile strength, breaking strength and the like; the aluminum foil glass fiber cloth is higher in mechanical strength than the glass fiber cloth alone due to the fact that the aluminum foil layer 12 is compounded. Meanwhile, the existence of the aluminum foil layer 12 can also improve the heat conduction performance. The arrangement of the aluminum foil layer 12 and the magnetic shield layer 60 can improve the heat conductivity, on the one hand, and can also improve the electromagnetic shielding effect.

Among them, the electromagnetic shielding effect of the magnetic shielding layer 60 is significantly superior to that of the aluminum foil layer 12. Due to the excellent electromagnetic shielding effect, the electromagnetic interference can be effectively reduced. The aluminum foil glass fiber cloth layer 10 also has excellent waterproof performance due to the performance of the aluminum foil glass fiber cloth layer.

Example 2

As shown in fig. 2 and 3, the aluminum-plated bump layer 50 includes a plurality of first aluminum-plated bump groups disposed at equal intervals along the length direction of the aluminum foil layer 12, and the first aluminum-plated bump groups include a plurality of first aluminum-plated bumps 51 disposed at equal intervals along the width direction of the aluminum foil layer 12; a second aluminum-plated protrusion group is arranged between two adjacent first aluminum-plated protrusion groups, and the second aluminum-plated protrusion group comprises a plurality of second aluminum-plated protrusions 52 which are arranged at equal intervals along the width direction of the aluminum foil layer 12; the first aluminum-plated bumps 51 and the second aluminum-plated bumps 52 are arranged in a staggered manner.

The arrangement of the first aluminum-plated protrusion 51 and the second aluminum-plated protrusion 52 can increase the surface roughness and the surface area of the aluminum foil/glass fiber cloth composite layer 10, thereby increasing the bonding strength between the aluminum foil/glass fiber cloth composite layer and the polyimide layer 20; meanwhile, the heat transfer area can be further increased. The first aluminum-plated bump 51 and the second aluminum-plated bump 52 are preferably manufactured by a vacuum plating process. The first aluminum-plated bumps 51 and the second aluminum-plated bumps 52 are arranged in a staggered manner, so that the bonding strength between the first aluminum-plated bumps and the polyimide layer 20 can be further improved.

Example 3

As shown in fig. 2 and 4, the magnetic shielding layer 60 includes a nickel-plated layer 61 disposed on the surface of the glass fiber cloth layer 11, a plurality of sets of third aluminum-plated protrusions disposed at equal intervals along the length direction of the aluminum foil layer 12 are disposed on the surface of the nickel-plated layer 61, and the sets of third aluminum-plated protrusions include a plurality of third aluminum-plated protrusions 62 disposed at equal intervals along the width direction of the aluminum foil layer 12; a fourth aluminum-plated protrusion group is arranged between two adjacent third aluminum-plated protrusion groups, and the fourth aluminum-plated protrusion group comprises a plurality of fourth aluminum-plated protrusions 64 which are arranged at equal intervals along the width direction of the aluminum foil layer 12; the third aluminum-plated bumps 62 and the fourth aluminum-plated bumps 64 are staggered.

First, nickel plating layer 61 is formed by means of electrolytic nickel plating and electroless nickel plating. Then, the third aluminum-plated bump 62 and the fourth aluminum-plated bump 64 are preferably formed by a vacuum plating process. Similarly, the third aluminum-plated protrusions 62 and the fourth aluminum-plated protrusions 64 increase the surface roughness and the surface area of the nickel-plated layer 61, thereby increasing the bonding strength between the nickel-plated layer and the heat-conducting silicone adhesive layer 30; meanwhile, the heat transfer area can be further increased. The third aluminum-plated bumps 62 and the fourth aluminum-plated bumps 64 are arranged in a staggered manner, so that the bonding strength between the third aluminum-plated bumps and the heat-conducting silicon adhesive layer 30 can be further improved.

The nickel-plated layer 61 has excellent electromagnetic shielding effect; wherein, the electromagnetic shielding effect of the nickel-plated layer 61 is significantly better than that of the aluminum foil layer 12. Compared with the iron, cobalt and nickel plating, the iron plating process is very complex, and the cobalt plating raw material cost is high; therefore, nickel plating is preferred.

Example 4

The shape of the first aluminum-plated bump 51 and the shape of the second aluminum-plated bump 52 are both oval, and the shape of the third aluminum-plated bump 62 and the shape of the fourth aluminum-plated bump 64 are both oval.

If the shape of the first aluminum-plated protrusion 51 is a conventional shape such as a circle, a square, a diamond, a regular hexagon, etc., the square, the diamond, the regular hexagon, etc., have a sharp pointed structure, so that the manufacturing process is relatively difficult, and the circular and elliptical structure processes are relatively low. Compared with a circular structure, the oval structure is beneficial to improving subsequent bonding strength. Therefore, the shape of the second aluminum-plated bump 52, the shape of the third aluminum-plated bump 62, and the shape of the fourth aluminum-plated bump 64 are all elliptical.

Furthermore, the included angle between the long axis direction of the first aluminum-plated protrusion 51 and the long axis of the second aluminum-plated protrusion 52 is alpha, and alpha is more than or equal to 60 degrees and less than or equal to 120 degrees; the included angle between the long axis direction of the third aluminum-plated protrusion 62 and the long axis of the fourth aluminum-plated protrusion 64 is beta, and beta is more than or equal to 60 degrees and less than or equal to 120 degrees. By such an arrangement, the bonding force between the first aluminum-plated bump 51, the second aluminum-plated bump 52, the third aluminum-plated bump 62 and the fourth aluminum-plated bump 64 and the corresponding bonding surfaces can be improved. Most preferably, α ═ β ═ 90 °.

Example 5

Further, a first blank area 13 is arranged between the side edge of the aluminum foil layer 12 and the side edge of the glass fiber cloth layer 11, and a first wavy or zigzag protruding structure 15 is further arranged on the side edge of the aluminum foil layer 12; a second white region 63 is arranged between the side edge of the nickel-plated layer 61 and the side edge of the glass fiber cloth layer 11, and a second wavy or zigzag protruding structure 65 is further arranged on the side edge of the nickel-plated layer 61.

The aluminum foil composite glass fiber cloth is used as a base material, and an etching process in the field of PCB is adopted to manufacture a first blank region 13 and a first protruding structure 15. The second margin region 63 and the second protrusion structure 65 are also formed using an etching process. The first and second margin regions 13 and 63 are provided such that the corresponding aluminum foil layer 12 and aluminum-plated bump layer 50 are completely covered with the corresponding insulating material, thereby further improving insulation.

In consideration of the processing difficulty, a wavy structure is preferable, but the wavy shape is not sharp enough. The saw-tooth structure is preferable in view of heat dissipation effect because the saw-tooth structure is sharper than the wave-like structure. The first convex structures 15 and the second convex structures 65 can further improve the bonding strength between the bonding surface and the bonding surface.

In the above-mentioned embodiment, the structure of multi-functional insulating piece through to current insulating piece carries out optimal design, outside keeping the insulating piece to have good insulating properties, still has functions such as heat conduction, electromagnetic shield, waterproof concurrently, and the function is various, and the usage is extensive, solves the defect of current insulating piece function singleness, implements effectually.

For the mode of multilayer stack installation among the prior art, the fine cloth layer 10 of aluminium foil glass, polyimide layer 20, heat conduction silica gel layer 30, protruding layer 50 of aluminizing and magnetic shield layer 60 adopt hot pressing complex or splice the complex to make each other, bonding strength between the hierarchical structure of multi-functional insulating piece is high, and final finished product thickness is less moreover.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (7)

1. A multifunctional insulating sheet is characterized in that: the aluminum foil and glass fiber composite material comprises an aluminum foil and glass fiber cloth layer (10), a polyimide layer (20) and a heat-conducting silica gel layer (30), wherein the aluminum foil and glass fiber cloth layer (10) comprises an aluminum foil layer (12) and a glass fiber cloth layer (11), an aluminum-plated convex layer (50) is arranged on the surface of the aluminum foil layer (12), the aluminum-plated convex layer (50) and the aluminum foil layer (12) are completely covered by the polyimide layer (20), and the polyimide layer (20) and the aluminum foil layer (12) are connected into a whole; the surface of the glass fiber cloth layer (11) is provided with a magnetic shielding layer (60), the heat conduction silica gel layer (30) completely covers the magnetic shielding layer (60) and the heat conduction silica gel layer (30) is connected with the magnetic shielding layer (60) into a whole.

2. The multifunctional insulating sheet of claim 1, wherein: the aluminum-plated convex layer (50) comprises a plurality of first aluminum-plated convex groups which are arranged at equal intervals along the length direction of the aluminum foil layer (12), and the first aluminum-plated convex groups comprise a plurality of first aluminum-plated convex groups (51) which are arranged at equal intervals along the width direction of the aluminum foil layer (12); a second aluminum-plated protrusion group is arranged between two adjacent first aluminum-plated protrusion groups, and comprises a plurality of second aluminum-plated protrusions (52) which are arranged at equal intervals along the width direction of the aluminum foil layer (12); the first aluminum-plated bumps (51) and the second aluminum-plated bumps (52) are arranged in a staggered manner.

3. The multifunctional insulating sheet of claim 2, wherein: the magnetic shielding layer (60) comprises a nickel-plated layer (61) arranged on the surface of the glass fiber cloth layer (11), a plurality of groups of third aluminum-plated protrusion groups arranged at equal intervals along the length direction of the aluminum foil layer (12) are arranged on the surface of the nickel-plated layer (61), and each third aluminum-plated protrusion group comprises a plurality of third aluminum-plated protrusions (62) arranged at equal intervals along the width direction of the aluminum foil layer (12); a fourth aluminum-plated protrusion group is arranged between two adjacent third aluminum-plated protrusion groups, and the fourth aluminum-plated protrusion group comprises a plurality of fourth aluminum-plated protrusions (64) which are arranged at equal intervals along the width direction of the aluminum foil layer (12); the third aluminum-plated bumps (62) and the fourth aluminum-plated bumps (64) are arranged in a staggered manner.

4. The multifunctional insulating sheet of claim 3, wherein: the shape of the first aluminum-plated bump (51) and the shape of the second aluminum-plated bump (52) are both oval, and the shape of the third aluminum-plated bump (62) and the shape of the fourth aluminum-plated bump (64) are both oval.

5. The multifunctional insulating sheet of claim 4, wherein: the included angle between the long axis direction of the first aluminum-plated protrusion (51) and the long axis of the second aluminum-plated protrusion (52) is alpha, and alpha is more than or equal to 60 degrees and less than or equal to 120 degrees; the included angle between the long axis direction of the third aluminum-plated protrusion (62) and the long axis of the fourth aluminum-plated protrusion (64) is beta, and the beta is more than or equal to 60 degrees and less than or equal to 120 degrees.

6. The multifunctional insulating sheet of claim 5, wherein: α ═ β ═ 90 °.

7. The multifunctional insulating sheet of claim 3, wherein: a first blank area (13) is arranged between the side edge of the aluminum foil layer (12) and the side edge of the glass fiber cloth layer (11), and a first wavy or zigzag protruding structure (15) is further arranged on the side edge of the aluminum foil layer (12); a second white space (63) is arranged between the side edge of the nickel-plated layer (61) and the side edge of the glass fiber cloth layer (11), and a second wavy or zigzag protruding structure (65) is further arranged on the side edge of the nickel-plated layer (61).

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