CN210781521U - FPC (flexible printed circuit) - Google Patents

Abstract

The utility model discloses a FPC, FPC includes the substrate layer and locates the circuit layer of substrate layer upper surface, the circuit layer includes the data line, the data line is connected with the TVS pipe, the line of walking on circuit layer does not include the right angle and walks the line. Because the data line is connected with the TVS pipe, and the line of walking on the circuit layer does not include the right angle and walks the line for static can be faster put away, avoids static to bring the harm for equipment, prevents that the display from causing the wrong face of picture, avoids influencing display effect.

Description

FPC (flexible printed circuit)

Technical Field

The utility model relates to a printed circuit board field, more specifically say, relate to a FPC.

Background

At present, the requirement of the display module on static electricity resistance is higher and higher, the display module is tested from 4KV static electricity in the test, the LCD is restarted until 6KV, then the LCD is automatically recovered, the phenomenon is more obvious and the phenomenon of disordered pictures occurs at 8KV, the reason of the phenomenon is that the static electricity is influenced by the low static electricity of the module, and how to improve the static electricity resistance of the FPC becomes the subject of the research of FPC manufacturers.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a FPC is provided, because the data line is connected with the TVS pipe, and the line of walking on circuit layer does not include the right angle and walks the line for static can be faster put away, avoids static to bring the harm for equipment, prevents that the display from causing the picture wrong face, avoids influencing display effect.

The utility model discloses the technical problem that will solve realizes through following technical scheme:

in order to solve the technical problem, the utility model provides a FPC, FPC includes the substrate layer and locates the circuit layer of substrate layer upper surface, the circuit layer includes the data line, the data line is connected with the TVS pipe, the line of walking on circuit layer does not include the right angle and walks the line.

Furthermore, the circuit layer is connected with a ground wire, and the ground wire is completely wrapped by a copper sheet.

Further, the lower surface of substrate layer is equipped with the metal heat dissipation layer, FPC still includes that at least one runs through the substrate layer circuit layer and the through-hole on metal heat dissipation layer, the inner wall of through-hole be provided with circuit layer the heat-conducting layer that the metal heat dissipation layer contacted.

Further, a heat conductor connected with an external heat conduction structure is arranged in the through hole, and the heat conductor is in contact with the heat conduction layer.

Further, the structure of the metal heat dissipation layer is a net structure, a strip structure, a wavy structure or a honeycomb structure.

Further, FPC includes the body, the body coupling has connecting portion, the both sides of connecting portion are equipped with two stiffening plates that stagger the setting each other, connecting portion keep away from the one end of body is equipped with the golden finger.

Further, the width of the two reinforcing plates is different.

Further, the material of the stiffening plate is FR4, PI or stainless steel.

Furthermore, the outer surface of the reinforcing plate is provided with diamond knurls.

Further, the surface of body is equipped with black printing ink layer and locates white printing ink layer on the black printing ink layer, white printing ink layer is provided with the two-dimensional code.

The utility model discloses following beneficial effect has:

because the data line is connected with the TVS pipe, and the line of walking on the circuit layer does not include the right angle and walks the line for static can be faster put away, avoids static to bring the harm for equipment, prevents that the display from causing the wrong face of picture, avoids influencing display effect.

The circuit layer is connected with a ground wire, and the ground wire is completely wrapped with a copper sheet. The copper sheet of ground wire switches on with outside iron stand for static can release through here, avoids the harm of static to equipment.

Drawings

Fig. 1 is a schematic structural diagram of an FPC provided by the present invention.

Fig. 2 is a schematic view of an improved structure of the FPC provided by the present invention.

Detailed Description

The present invention will be described in detail with reference to the following examples, which are only preferred embodiments of the present invention and are not intended to limit the present invention.

Please refer to fig. 1, for the utility model provides a pair of FPC, FPC includes substrate layer 1 and locates the circuit layer 2 of 1 upper surface of substrate layer, circuit layer 2 includes the data line, the data line is connected with the TVS pipe, line of walking of circuit layer 2 does not include the right angle and walks the line. Because the data line is connected with the TVS pipe, and the line of walking of circuit layer 2 does not include the right angle and walks the line for static can be faster put away, avoids static to bring the harm for equipment, prevents that the display from causing the wrong face of picture, avoids influencing display effect.

Further, the upper surface of the substrate layer 1 is provided with a circuit layer 2, the lower surface of the substrate layer 1 is provided with a metal heat dissipation layer 3, and the circuit layer 2 and the metal heat dissipation layer 3 can be respectively adhered to the substrate layer 1 through double faced adhesive tapes. Because the thickness of the substrate layer 1 is thin, heat on the FPC can be diffused to the metal heat dissipation layer 3 through the substrate layer 1, the heat dissipation area of the FPC can be effectively increased through the metal heat dissipation layer 3, the effect of uniform heat dissipation is achieved, and therefore the heat dissipation efficiency of the FPC is improved. The substrate layer 1 can be any one of polyimide, polyester, polysulfone or polytetrafluoroethylene, the double-sided adhesive tape is any one of an acrylic adhesive tape or an epoxy resin adhesive tape, and the metal heat dissipation layer 3 can be a copper foil layer.

Furthermore, the circuit layer 2 is connected with a ground wire, and the ground wire is completely wrapped by a copper sheet. The copper sheet of ground wire switches on with outside iron stand for static can release through here, avoids the harm of static to equipment.

Further, the FPC also comprises at least one through hole 4 penetrating through the substrate layer 1, the circuit layer 2 and the metal heat dissipation layer 3, the inner wall of the through hole 4 is provided with a heat conduction layer contacting with the circuit layer 2 and the metal heat dissipation layer 3, the circuit layer 2 and the metal heat dissipation layer 3 on two sides of the substrate layer 1 can be electrically connected by utilizing good heat conduction performance of the through hole 4, a good heat conduction function is exerted, and the heat conduction layer can provide a heat conduction function so as to achieve a good heat dissipation effect. The heat conducting layer can be a copper adhesive conductive ink layer.

Further, a heat conductor connected with an external heat conducting structure is arranged in the through hole 4, the heat conductor is connected with the external heat conducting structure from one side of the circuit layer 2 and is also in contact with the heat conducting layer in the through hole 4, so that the circuit layer 2 and the metal heat dissipation layer 3 can be connected with the external heat conducting structure through the through hole 4, heat in the FPC is diffused to the external heat conducting structure through the heat conductor in the through hole 4, and the heat dissipation efficiency of the FPC is further improved. Preferably, the through hole 4 is provided at an edge position of the FPC in order that the through hole 4 may be connected with an external heat conductive structure.

Further, the metal heat dissipation layer 3 is an even heat dissipation structure, and the structure thereof may be any one of a mesh structure, a strip structure, a wave structure or a honeycomb structure.

Referring to fig. 2, further, the FPC includes a main body 100, the main body 100 is connected to a connection portion 200, two reinforcing plates 300 are disposed on two sides of the connection portion 200 and staggered with each other, and a gold finger 400 is disposed at an end of the connection portion 200 away from the main body 100. In the conventional FPC design, the reinforcing plate 300 is usually not provided or the reinforcing plate 300 is provided at the same position and the width of the reinforcing plate 300 is the same, so that when the FPC is pulled out, the applied pressure is concentrated on the same straight line, which causes the slight disconnection of the FPC line. The utility model provides a FPC is because two stiffening plates 300 are located the both sides of connecting portion 200 respectively and stagger the setting each other, and when extracting FPC, both sides stiffening plate 300 is not on same line segment for FPC's pressure, and stress can not concentrate on same straight line when buckling yet, avoids stress concentration from this, and the problem of the circuit of golden finger 400 department is disconnected a little easily improves the product yield.

Further, the two reinforcing plates 300 staggered with each other in the present invention may be respectively disposed at two different positions; the positions of the central points may be the same, but the widths of the two reinforcing plates 300 are different, and the stress generated when the two reinforcing plates 300 are bent is not concentrated on the same straight line, so that the problems of stress concentration and easy micro-breaking of the circuit at the golden finger 400 can be avoided, and the yield of products can be improved. In this embodiment, the reinforcing plates 300 include first reinforcing plates and second reinforcing plates, the width of each reinforcing plate 300 is different, and the center points of the reinforcing plates are located on the same horizontal line, so that the edges of the reinforcing plates 300 are staggered from each other, and are not concentrated on the same straight line.

Further, the material of the reinforcing plate 300 is FR4, PI or stainless steel, and in other embodiments, if the heat generation amount of the FPC is large, a heat dissipation material with better heat dissipation effect, such as an aluminum foil reinforcing plate 300, may also be used.

Further, the outer surface of the reinforcing plate 300 is provided with a diamond knurl, so that the FPC can be pulled out more easily when the FPC is pulled out, and the risk of breakage of an FPC circuit is reduced.

Further, the outer surface of the body 100 is provided with a black ink layer and a white ink layer arranged on the black ink layer, and the white ink layer is provided with a two-dimensional code. Owing to set up two-layer printing ink on black printing ink layer and white printing ink layer, having got rid of top layer white printing ink layer, the black printing ink layer of bottom exposes, can show for black, and the two-dimensional code contrast that generates through this kind of mode is effectual, sweeps the sign indicating number easily, and the damage can not dropped yet to the two-dimensional code simultaneously, prevents that the two-dimensional code from becoming invalid, has reduced labour cost by a wide margin.

The above embodiments only express the embodiments of the present invention, and the description thereof is specific and detailed, but the invention can not be understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by adopting the equivalent substitution or equivalent transformation should fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a FPC, its characterized in that, FPC includes the substrate layer and locates the circuit layer of substrate layer upper surface, the circuit layer includes the data line, the data line is connected with the TVS pipe, the line of walking on circuit layer does not include the right angle and walks the line.

2. The FPC of claim 1, wherein the wiring layer is connected to a ground wire that is fully wrapped with a copper sheet.

3. The FPC of claim 1, wherein a metal heat dissipation layer is disposed on a lower surface of the substrate layer, the FPC further comprises at least one through hole penetrating through the substrate layer, the circuit layer and the metal heat dissipation layer, and a heat conduction layer contacting the circuit layer and the metal heat dissipation layer is disposed on an inner wall of the through hole.

4. The FPC of claim 3, wherein a heat conductor connected to an external heat conducting structure is disposed within the through hole, the heat conductor being in contact with the heat conducting layer.

5. The FPC according to claim 1, wherein the structure of the metal heat dissipation layer is a mesh structure, a stripe structure, a wave structure, or a honeycomb structure.

6. The FPC of claim 1, wherein the FPC comprises a body, the body is connected with a connecting portion, two reinforcing plates are arranged on two sides of the connecting portion, the two reinforcing plates are arranged in a staggered manner, and a golden finger is arranged at one end, away from the body, of the connecting portion.

7. The FPC of claim 6, wherein the two stiffening plates are of different widths.

8. The FPC of claim 6, wherein the material of the stiffener is FR4, PI, or stainless steel.

9. The FPC of claim 6, wherein an outer surface of the stiffener is provided with diamond knurls.

10. The FPC of claim 6, wherein the outer surface of the body is provided with a black ink layer and a white ink layer disposed on the black ink layer, and the white ink layer is provided with a two-dimensional code.

Images