WO2018028214A1

WO2018028214A1 - Led light strip circuit board module comprising multifunctional aluminum foil

Info

Publication number: WO2018028214A1
Application number: PCT/CN2017/078711
Authority: WO
Inventors: 王定锋; 徐文红
Original assignee: 王定锋
Priority date: 2016-08-09
Filing date: 2017-03-30
Publication date: 2018-02-15
Also published as: CN206100596U

Abstract

The present application relates to an LED light strip circuit board module comprising a multifunctional aluminum foil. In one embodiment, a single-sided flexible circuit board is coated with an adhesive on the rear side, a lead tin via is pierced using a die, then a metal back line of an easy-to-solder metal at least on the surface is laid on the rear side in alignment to the lead tin via, and the metal back line is exposed at the lead tin via on the front side of the single-sided flexible circuit board; multiple aluminum foil strips greater in width than the back line are laid at a certain interval on the back line, cover the back line, are glued by the adhesive on either side of the back line, and tightly sandwich the back line in the middle for contact connection; an SMT chip soldering component solders together the back line at the lead tin via and a front side circuit, thus allowing the aluminum foil on the rear side, the metal back line, the front side circuit to be connected with each other, and forming the LED light strip circuit board module having the multifunctional aluminum foil. The present application solves the difficulty of connecting an aluminum circuit to a copper-plated circuit on a light strip.

Description

LED lamp with circuit board module with multifunctional aluminum foil

This application claims the priority of the Chinese patent application "A LED lamp strip circuit board module made of multi-function aluminum foil" (application No. 201620869597.8) with the application date of August 9, 2016 and the applicant is Wang Dingfeng. The entire contents of this patent application are incorporated herein by reference.

Technical field

This application relates generally to the field of circuit boards, and more particularly to LED circuit boards and LED applications. More specifically, the present application relates to an LED lamp strip circuit board module including a multifunctional aluminum foil.

Background technique

LED lamp with circuit board The prior art circuit board, because aluminum can not be soldered, has not used cheap aluminum for the circuit, although the high-voltage lamp belt uses cheap aluminum wire to conduct electricity outside the circuit board, but this aluminum wire and line The conduction between the two is not the conduction of the solder, and is electrically connected one by one by winding the thin wires one by one, and the efficiency is low.

In addition, since the LED strips are usually provided with a periodically set shear position, they are cut at the shear position as needed during use, in order to avoid short-circuiting of the cross-section of the cross-section, and to meet the resistance The voltage safety regulations stipulate that the lamp strip circuit board has not been able to replace the expensive PI with a cheap aluminum foil as a cover film to protect the back circuit, and the lamp strip circuit board has not been able to use aluminum foil instead of PI as a substrate to make a high heat dissipation aluminum-based flexible board. It is then made into a high-heat-dissipation aluminum-based soft LED strip.

In order to overcome the above deficiencies, according to the present application, an LED lamp strip circuit board module comprising a multifunctional aluminum foil and a manufacturing method thereof are proposed, which are laminated on a single-sided flexible circuit board by an adhesive using at least a copper back line. On the back side, the aluminum foil with a width larger than the back line is covered with a certain safe distance to cover the back line and wrap the back line. At the same time, the adhesive on both sides of the back line is firmly adhered, and the back line is closely attached to the middle contact, so that The back wire and the aluminum foil are electrically conductive, which not only increases the current load capacity of the lamp strip circuit board, but also replaces the PI with the aluminum foil to protect the back line from falling off and is not easy to break, and the large-area aluminum foil is attached to the back of the circuit board to provide a good heat dissipation effect. The soldering of the front side circuit and the back line of at least the surface of the copper at the tin-conducting hole are soldered, and the aluminum circuit, the back line and the front side circuit of the back side are electrically connected to each other, thereby solving the difficulty of the aluminum circuit on the strip. The copper circuit is connected to the conduction problem.

Summary of invention

According to the present application, an LED lamp strip circuit board module comprising a multifunctional aluminum foil and a manufacturing method thereof are disclosed. Specifically, a back side of a single-sided flexible circuit board is glued, and a tin hole is punched out by a mold, and then on the back side. The alignment is covered with a metal backing wire having at least a surface of a solder metal, which includes copper and a copper alloy, or a metal nickel-plated wire, or a metal tinned wire, or a metal-plated wire, or a metal-plated wire, or a copper clad aluminum wire or a copper clad iron wire, wherein the metal back wire is correspondingly disposed at a position of the tin guiding hole, and the metal back wire is exposed from a tin guiding hole on the front side of the single-sided flexible circuit board; The strip of aluminum foil has a width larger than the width of the back line, and then covers the back line and covers the back line at a certain distance, and is adhered to the adhesive on both sides of the back line, and the back line is closely attached to the middle contact, so that The current load capacity of the lamp strip circuit board is increased, and the aluminum foil replaces the PI to protect the back line from falling off, which is not easy to break, and the large-area aluminum foil is attached to the back side of the circuit board to perform a good heat dissipation function; the SMT patch soldering component is printed. At the same time as the solder paste, the solder paste is also printed on the tin-conducting hole. When the soldering component is reflowed, the tin at the tin-conducting hole will be soldered to the surface of the solder wire and the front side of the solder joint, or / and the component leg is firm. Soldered together, the aluminum foil on the back side, the metal back line, the front side circuit are electrically connected to each other, or after SMT, two or more single short welded parts of the lighted strip are welded to the strip. At the same time, tin is applied at the tin-conducting hole, and the soldering and connecting ends of the front and rear wiring strips are welded, and the front and back solders of the board are electrically connected to each other, so that the aluminum foil, the metal backing line and the front side circuit are electrically connected together. The utility model relates to an LED lamp with a multi-function aluminum foil with a circuit board module. The application solves the problem that the aluminum circuit on the lamp strip is difficult to connect with the copper surface circuit.

According to the present application, an LED lamp strip circuit board module comprising a multifunctional aluminum foil and a manufacturing method thereof are provided, comprising: coating a back side of a single-sided flexible circuit board, punching a tin-conducting hole with a mold, and then aligning the back side A metal backing wire having at least a surface of a solder metal, including copper and copper alloy, or metal nickel plating, or metal tin plating, or metal silver plating, or metal gold plating, or copper clad aluminum, or copper. The iron backing wire is correspondingly covered at the position of the tin guiding hole, and the metal backing wire is exposed from the tin guiding hole of the front side of the single-sided flexible circuit board; the aluminum foil is divided into a plurality of aluminum foil strips, the width of which is larger than the back Line width, then keep a certain distance covering the back line and wrap the back line, and at the same time be glued by the adhesive on both sides of the back line, and the back line is clamped in the middle contact conduction, which not only increases the current load of the strip circuit board Capability, at the same time, the aluminum foil replaces the PI to protect the backing wire from falling off the film and is not easy to break, and the large-area aluminum foil is attached to the back of the circuit board to play a good heat dissipation effect; the SMT patch soldering component, while printing the solder paste, The solder paste is also printed on the tin hole. When the soldering component is reflowed, the tin at the tin-conducting hole will be soldered to the surface of the solder wire with the surface of the solder wire, or/and the component leg is firmly soldered to the back side. Aluminum foil, metal backing, frontal circuits are conductive to each other; and/or after SMT, two or more singles When a short strip of welded component light is soldered to the lamp strip, tin is applied to the tin-conducting hole, and the solder joints of the front and back of the strip of the front and rear strips are soldered and connected, so that the front and back solders of the board are electrically connected to each other. The aluminum foil, the metal back wire and the front circuit are electrically connected together; through the above method, an LED lamp strip circuit board module containing a multifunctional aluminum foil is prepared.

According to the application, there is also provided a LED lamp strip circuit board module comprising a multifunctional aluminum foil, comprising: a component layer; a front solder mask layer; a front wiring layer; an insulating film layer; an adhesive layer; a back layer; an electrically conductive aluminum foil a protective layer; a tin-conducting hole disposed on the front solder resist layer, the front wiring layer, the insulating film layer, and the adhesive layer; wherein the tin-conducting hole penetrates the front solder resist layer, the front wiring layer, the insulating film layer, and An adhesive layer; the backing line is a metal wire having at least a surface of a solderable metal, the solderable metal being copper or a copper alloy, or other metal having only a surface of copper or nickel or tin or silver or gold, and At least two or more juxtaposed arrays are adhered to the back side of the circuit board by the adhesive layer, and exposed from the side of the front solder resist layer at the tin-conducting hole; the conductive and heat-conductive aluminum foil protective layer is at least two or two The above aluminum foil has a width larger than the width of the back line, and covers the back line and covers the back line at a certain interval, and is adhered to the adhesive on both sides of the back line, and the back line is closely clamped in the middle and closely in contact with the back line. guide And forming a protection for the back line; the front and back sides of the circuit are conductive, the metal back line and the front circuit solder joint are welded together by solder at the tin hole to form a conduction, or the solder hole is passed through the tin hole The metal back wire and the front component legs are soldered together to form a conduction, or the component leg, the front circuit, and the metal back wire are simultaneously welded together to form a conduction. Finally, the back aluminum foil and the back line and the front circuit are turned on together.

According to a preferred embodiment of the present application, a multi-functional aluminum foil-containing LED lamp strip circuit board module is characterized in that the back line is a round wire, or a flat wire, or a stranded wire; When the back line is a flat line, the back line is formed by calendering or by metal cutting.

According to a preferred embodiment of the present application, a multi-functional aluminum foil-containing LED lamp strip circuit board module is characterized in that the back line is a copper wire, or a copper clad aluminum wire, or a copper clad wire. Or copper clad zinc wire.

According to a preferred embodiment of the present application, a multi-functional aluminum foil-containing LED lamp strip circuit board module is characterized in that a layer of ink is printed on an aluminum foil surface on the back side of the circuit board, or an insulating resin is applied. Or attach a layer of insulating film with glue to form the insulation between the aluminum foil and the aluminum foil, and between the aluminum foil and the outside.

According to a preferred embodiment of the present application, a multi-function aluminum foil-containing LED lamp strip circuit board module is characterized in that, when a low-voltage lamp strip is fabricated, a double-sided tape is directly attached to the back surface of the circuit board to form an aluminum foil and Insulation between aluminum foil and aluminum foil and the outside world.

According to a preferred embodiment of the present application, a multi-functional aluminum foil-containing LED lamp strip circuit board module is characterized in that, when a high-voltage lamp strip is fabricated, the circuit board has been in contact with the aluminum foil on the back side. And at least the surface of the easy-to-solder metal back line has formed a positive and negative lead.

According to a preferred embodiment of the present application, a multi-function aluminum foil-containing LED lamp strip circuit board module is characterized in that the lamp strip circuit board is provided with a periodic shear position so that it can be in any shear position. Cut and use.

According to a preferred embodiment of the present application, a multi-function aluminum foil-containing LED lamp with a circuit board module, when the lamp strip is made by a module, is characterized in that a double-sided surface is directly attached to the back of the LED strip Apply glue to the front side, that is, the side of the LED component, apply double-sided tape on the back side, or wrap the LED light strip in the glue.

In the following description of the drawings and specific embodiments, details of one or more embodiments of the present application are set forth. The aspects and advantages of the present invention are set forth in part in the description which follows,

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in FIG

The complete and exemplifying disclosure of the present application, including the preferred embodiments thereof, which are described in the specification of the claims Without any limitation, the dimensions in the drawings are not drawn to scale.

The features, objects, and advantages of the present invention will become more apparent from the aspects of the appended claims.

1 is a schematic cross-sectional view of a flat wire having a round copper clad aluminum wire crimped copper wire of a certain width and thickness in accordance with a preferred embodiment of the present application.

2 is a schematic plan view of an aluminum foil slit into a plurality of aluminum foil strips having a width greater than the back, in accordance with a preferred embodiment of the present application.

3 is a schematic cross-sectional view of a single-sided flexible circuit board in accordance with a preferred embodiment of the present application.

4 is a schematic cross-sectional view of a back side of a single-sided flexible circuit board after being glued according to a preferred embodiment of the present application.

FIG. 5 is a schematic diagram of a single-sided flexible circuit board after being glued according to a preferred embodiment of the present application. Schematic diagram of the cross section after the tin hole.

FIG. 6 is a schematic plan view showing the position of the top wire corresponding to the tin-cord hole and the single-sided flexible circuit board, and the back line is exposed from the side of the front solder resist layer, according to a preferred embodiment of the present application.

FIG. 7 illustrates a cross-corresponding tin-cord hole in a position corresponding to a single-sided flexible circuit board according to a preferred embodiment of the present application, the back-line being exposed from the side of the front solder resist layer, and a cross section at the position of the tin-conducting hole Schematic (also a schematic cross-sectional view of Figure 6 at the position of the tin-conducting hole).

8 is an aluminum foil strip having a width greater than a back line, covering a back line and enclosing the back line, and being coated on both sides of the back line by a single-sided flexible circuit board adhesive according to a preferred embodiment of the present application. Sticky, the cross-section of the backing wire is placed in the middle contact, and the cross-section of the position of the tin-conducting hole is shown.

FIG. 9 is an aluminum foil strip having a width greater than a back line, covering a back line and enclosing the back line, and being coated on both sides of the back line by an adhesive on a single-sided flexible circuit board, according to a preferred embodiment of the present application. A schematic cross-sectional view of a bonded interlayer structure.

Figure 10 is a cross-sectional view showing the entire back surface of the wiring board uniformly printed with a layer of ink on the back side of the wiring board, i.e., the side of the aluminum foil, in accordance with a preferred embodiment of the present application.

11 is a SMT chip soldering component according to a preferred embodiment of the present application, and the tin at the tin-conducting hole is welded to the surface of the solderable metal and the front surface solder joint, so that the aluminum foil on the back side, A schematic cross-sectional view of a metal backing wire and a front side circuit being electrically connected to each other.

12 is a schematic view of a preferred embodiment of the present application, a soldering hole is disposed on a circuit board at a component foot position of the soldering component, and the tin at the tin guiding hole directly solders the component leg to the backing wire to make the back surface thereof A schematic cross-sectional view of aluminum foil, metal backing, and front side circuits being electrically connected to each other.

FIG. 13 is a schematic view of a preferred embodiment of the present application, a soldering hole is disposed on a circuit board at a portion of the component leg of the soldering component, and the tin at the tin guiding hole directly solders the component leg, the front side line, and the back line. A schematic cross-sectional view of the aluminum foil, the metal backing wire, and the front side circuit of the back side being electrically connected to each other.

FIG. 14 is a cross-sectional view showing the aluminum circuit, the back line, and the front side circuit of the back side being electrically connected to each other by soldering the front side circuit and the back side wire through the soldering hole according to a preferred embodiment of the present application.

Detailed description of the preferred embodiment

For the convenience of the description of the present application, a plurality of preferred embodiments of the present application will now be described in detail with reference to the accompanying drawings.

However, those skilled in the art should understand that the following description is merely illustrative of the preferred embodiments of the invention, and the claims are not limited. The embodiments in this specification are only intended The principles and some specific embodiments of the present application are explained, and are not intended to limit the scope of the application. The patentable scope of the application is limited only by the claims.

Those skilled in the art will appreciate that some of the terms in the present invention, such as "circuitry" and "circuit", "circuit board" and "circuit board", are used interchangeably.

1. Fabrication of the backing line: As shown in Fig. 1, a round copper clad aluminum wire (1) is rolled into a flat wire of a certain width and thickness by a calender to form a copper backing line (1.1).

2. Aluminum foil production for conducting, heat conducting and protective layers: as shown in Fig. 2, the aluminum foil (2) is slit into a plurality of strips (2.1) with a width larger than the back line (1.1). .

3, single-sided flexible circuit board production: using a single-panel manufacturing process, using a soft single-sided copper-clad substrate silk screen line ink, baking curing, etching lines, retreating line ink, silk screen soldering, baking curing Made into a single-sided flexible circuit board (as shown in Figure 3), in Figure 3, the mark (3.1) is the insulating film layer, the mark (3.2) is the front circuit layer, and the mark (3.3) is the front solder resist layer. The process is a traditional process and will not be described in detail herein.

4. Place the fabricated single-sided flexible circuit board on the side of the back insulation film (3.1) of the circuit board with a layer of glue (3.4) (as shown in Figure 4). Pre-bake the solvent in the glue. Volatilize, and then die-cut with a punched tin hole die designed and manufactured according to engineering data, punch out the tin-conducting hole (3.5) as shown in Figure 5, and lead-through hole (3.5) through the front solder mask (3.3) , front wiring layer (3.2), insulating film layer (3.3) and adhesive layer (3.4).

5. On the laminating machine, the side of the single-sided flexible circuit board with the adhesive (3.4) of the single-sided flexible circuit board which is rolled and fabricated with the copper-clad aluminum flat back line (1.1) and the glue-coated tin hole (3.5) The top line (1.1) is respectively aligned with the position of the tin-conducting hole (3.5) (as shown in FIG. 6 and FIG. 7), and then the aluminum foil strip (2.1) having a width larger than that of the back line is cut. Cover the backing line (1.1) with a certain distance on the laminating machine, and wrap the backing line (1.1). The aluminum foil strip (2.1) is coated on both sides of the backing line (1.1) on the single-sided flexible circuit board (3.4). Adhesively, the backing wire (1.1) is tightly sandwiched between the aluminum foil tape (2.1) and the single-sided flexible circuit board coated with the adhesive (3.4), so that the aluminum foil tape (2.1) is in contact with the back wire (1.1). Pass (as shown in Figure 8, Figure 9).

6. On the back side of the circuit board, that is, the side of the aluminum foil tape (2.1), the entire back surface of the circuit board is uniformly printed with a layer of ink (4) between the aluminum foil tape (2.1) and the aluminum foil tape (2.1). And the aluminum foil tape (2.1) is insulated from the outside (as shown in Figure 10).

7. Perform OSP surface oxidation treatment on the solder joints.

8. Using the shape slitting and slitting machine, the circuit board after the OSP surface anti-oxidation treatment is slit and formed into a LED light strip circuit board containing multifunctional aluminum foil.

9. Using the traditional SMT patch method, solder paste (5.1) is printed on the component pads of the LED lamp strip circuit board made of multi-functional aluminum foil, and the solder paste is also printed on the tin-conducting hole. (3.6), placement The LED (5) is on the solder paste (5.1), and then the LED (5) component is soldered by reflow soldering. At the same time, the solder paste (3.6) at the solder via hole is the back line (1.1) and the front side circuit of the solderable metal. (3.2) Firmly solder together, and make the aluminum foil (2.1), metal back wire (1.1) and front circuit (3.2) on the back side conductive together (as shown in Figure 11), and make LED with multi-function aluminum foil. Light strip circuit board module.

Of course, the solder conduction structure at the tin-conducting hole can also be designed as a solder-conducting structure as shown in FIG. 12, and a solder-conducting hole is provided on the circuit board at a part of the component leg of the soldering component (5). The solder at the tin hole (5.2) directly solders the component leg to the back wire (1.1), and the aluminum foil (2.1), the metal back wire (1.1), and the front circuit phase (3.2) on the back side are electrically connected to each other.

Of course, the solder conduction structure at the tin-conducting hole can also be designed as a solder-conducting structure as shown in FIG. 13, and a solder-conducting hole is provided on the circuit board at a part of the component leg of the soldering component (5). The solder at the tin hole (5.3) directly solders a part of the component leg (5), the front side line (3.2) and the back line (1.1), so that the aluminum foil, the metal back line, and the front side circuit of the back side are electrically connected to each other. together.

Figure 14 shows the soldering of the front side circuit (3.2) and the back side line (1.1) at the tin-conducting hole at the tin-conducting hole, so that the aluminum circuit (2.1) and the back line (1.1) on the back side are connected. The front side circuits (3.2) are electrically connected to each other.

The utility model relates to a multi-functional aluminum foil-containing LED lamp strip circuit board module, which adopts an aluminum foil strip (2.1) on three sides to clamp at least a copper back line (1.1), and at the same time, through solder (3.6) in the lead tin The front side circuit (3.2) and the back line (1.1) are welded and turned on at the hole (3.5), and the back line (1.1) is in contact with the aluminum foil strip (2.1), so that the aluminum foil strip (2.1) on the back side and the back line are provided. (1.1), the front side circuit (3.2) is electrically connected to each other, or/and a part of the element (5) is directly soldered to the back line (1.1) by solder at a part of the element foot of the over part, or a part of the element of the element (5) is directly connected. The front line (3.2) and the back line (1.1) are welded together, so that the aluminum foil, the metal back line and the front side circuit of the back side are electrically connected to each other, and the aluminum circuit on the strip is difficult to be connected with the copper surface circuit. Through the problem, the current load capacity of the lamp strip circuit board is increased, and the aluminum foil replaces the PI to protect the back line from falling off and is not easy to break, and the large-area aluminum foil is attached to the back side of the circuit board to provide a good heat dissipation effect.

The present application has been described in detail with reference to the accompanying drawings and some preferred embodiments of a specific embodiment of the multifunction aluminum foil-containing LED lamp strip circuit board module of the present application and a manufacturing method thereof. However, those skilled in the art should understand that the above description is only illustrative of the specific embodiments, and the scope of the claims of the present application is not limited.

Many modifications and variations will occur to those skilled in the art. Therefore, it is to be understood that the appended claims are intended to cover all such modifications and modifications The scope of protection of this application is to be limited only by the appended claims.

Claims

A LED lamp with circuit board module with multifunctional aluminum foil, comprising:

Component layer

Front solder mask;

Front line layer;

Insulating film layer;

Adhesive layer

Topline layer

Conductive and thermal conductive aluminum foil protective layer;

a tin-conducting hole provided on the front solder resist layer, the front wiring layer, the insulating film layer and the adhesive layer;

The conductive tin is penetrated through the front solder mask, the front wiring layer, the insulating film layer and the adhesive layer; the back wire is a metal wire having at least a surface of a solderable metal, and the solderable metal is Copper or copper alloy, or only other metals whose surface is copper or nickel or tin or silver or gold, and at least two or more of them are juxtaposed, and are adhered to the back side of the circuit board by the adhesive layer. The conductive heat conductive aluminum foil protective layer is at least two or more aluminum foils, the width of which is greater than the width of the back line, and a certain distance is covered on the back line and encloses the back line. The adhesive on both sides of the back line is firmly adhered, and the back line is closely clamped in the middle and is in close contact with the back line to be mutually conductive, and the protection of the back line is formed;

The positive and negative two-sided circuit is conductive, and the metal back wire and the front circuit solder joint are welded together at the tin-conducting hole to form a conduction, or the metal back wire and the front component leg are soldered by the solder at the tin-conducting hole. The conduction is formed together, or the component legs, the front circuit, and the metal back wire are simultaneously soldered together to form a conduction, and finally, the back aluminum foil and the back line and the front circuit are electrically connected together.
The multifunction aluminum foil-containing LED lamp strip circuit board module according to claim 1, wherein the back line is a round line, or a flat line, or a stranded wire; the back line is a flat line When the back line is formed by calendering or by metal cutting.
The LED lamp strip circuit board module with multifunctional aluminum foil according to claim 1, wherein the back line is copper wire, or copper clad aluminum wire, or copper clad wire, or copper clad zinc. line.
The LED lamp strip circuit board module comprising the multifunctional aluminum foil according to claim 1, wherein a layer of ink is printed on the surface of the aluminum foil on the back side of the circuit board, or an insulating resin is applied, or A layer of insulating film is applied to form an insulation between the aluminum foil and the aluminum foil, and between the aluminum foil and the outside.
The LED lamp strip circuit board module comprising the multifunctional aluminum foil according to claim 1, wherein when the low voltage lamp strip is made, the double-sided adhesive is directly attached on the back side of the circuit board to form an aluminum foil and an aluminum foil, and Insulation between the aluminum foil and the outside world.
The LED lamp strip circuit board module with multifunctional aluminum foil according to claim 1, wherein when the high voltage lamp strip is made, the circuit board has been contacted by the aluminum foil on the back side and at least the surface is easy. The solder metal back line has formed a positive and negative lead line.
The LED lamp strip circuit board module with multifunctional aluminum foil according to claim 1, wherein the strip circuit board is provided with a periodic shearing position so that it can be cut and used at any shear position.
The LED lamp strip circuit board module with multifunctional aluminum foil according to claim 1, wherein when the lamp strip is made by the module, the feature is that the double-sided adhesive is directly attached to the back of the LED strip, or on the front side. That is, the side of the LED component is coated with a waterproof glue, the back side is coated with double-sided tape, or the LED light strip is wrapped in the glue by means of encapsulation.