CN114501777A

CN114501777A - Prevent FPC structure and camera module of light leak

Info

Publication number: CN114501777A
Application number: CN202111596573.1A
Authority: CN
Inventors: 张广磊
Original assignee: Jiangxi Holitech Technology Co Ltd
Current assignee: Jiangxi Holitech Technology Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-13

Abstract

The invention relates to an FPC structure for preventing light leakage, which comprises an FPC structure body, wherein the FPC structure body comprises a steel sheet positioned at the lowest layer, a reinforcing glue covered on the upper surface of the steel sheet, a protective film covered on the surface of the reinforcing glue, an FPC base material covered on the upper surface of the protective film and a shading layer covered on the upper surface of the FPC base material, the shading layer is a black ink layer manufactured through a printing process, and a black ink layer is added on the original FPC structure and positioned at the uppermost layer of the FPC structure, so that the problem of light leakage of the FPC structure can be effectively solved, the hidden danger of light leakage is eliminated, the imaging quality of a camera module is improved, and the FPC is simple in structure, convenient to manufacture and low in cost.

Description

Prevent FPC structure and camera module of light leak

Technical Field

The invention relates to the technical field of camera modules, in particular to an FPC structure for preventing light leakage and a camera module.

Background

In the field of camera modules, the photosensitive chip plays a role of lifting, and the photosensitive chip can be divided into a front-illuminated type, a back-illuminated type and a stack type according to the manufacturing and stacking process in the photosensitive chip. The photosensitive chip of lower order generally adopts all to be the process of preceding formula of shining, takes the structure that preceding formula process was made, and its light must pass through the opening on circuit layer when arriving photosensitive chip layer, easily causes light loss like this to make photosensitive chip easily receive the interference of the light that comes from its bottom, the penetrating power of light is strong, and a small amount of light gets into and influences the formation of image of photosensitive chip in the module. In the camera module, the FPC manufacturing process adopts the traditional process, namely, the FPC is manufactured by adopting a yellow protective film, and the yellow protective film belongs to a similar semitransparent medium and can cause certain light to penetrate into the bottom of the photosensitive chip, so that the imaging abnormality of the photosensitive chip is caused.

Disclosure of Invention

The invention aims to provide the FPC structure and the camera module which have the advantages of simple structure, convenience in manufacturing, capability of improving imaging quality and low cost and are used for preventing light leakage.

The invention adopts the technical scheme that the FPC structure capable of preventing light leakage comprises an FPC structure body, wherein the FPC structure body comprises a steel sheet positioned at the lowest layer, a reinforcing glue covered on the upper surface of the steel sheet, a protective film covered on the upper surface of the reinforcing glue, an FPC base material covered on the upper surface of the protective film and a shading layer covered on the upper surface of the FPC base material, and the shading layer is a black ink layer manufactured through a printing process.

The invention has the beneficial effects that: adopt this structure, structural at original FPC, add one deck black printing ink layer, this black printing ink layer is located the superiors of FPC structure, just so can effectively solve the problem that the FPC structure takes place the light leak, has eliminated the light leak hidden danger, has improved the imaging quality of camera module, this kind of FPC simple structure, and the preparation is convenient to low cost.

Preferably, the protection film is a black ink layer printed on the upper surface of the reinforcing glue by adopting a printing process, and by adopting the structure, the protection film in the FPC structure is the black ink layer manufactured by the printing process, so that a semitransparent yellow protection film in the prior art is replaced, the purpose of fully shading can be achieved, the light leakage of the FPC structure is prevented, the light leakage problem of a camera module is avoided, the module cost is not increased, the module light leakage problem is effectively solved, the hidden danger of the module light leakage is eliminated, and the integral imaging quality of the module is improved.

Preferably, the FPC substrate comprises a protective film adhesive covered on the upper surface of the protective film, a first copper electroplating layer covered on the upper surface of the protective film adhesive, a first copper layer covered on the upper surface of the first copper electroplating layer, a base thin film layer covered on the upper surface of the first copper layer, a second copper layer covered on the upper surface of the base thin film layer and a second copper electroplating layer covered on the upper surface of the second copper layer.

The utility model provides a camera module, includes above FPC structure body, be located the lens mount of FPC structure body top and be located the lens mount, adopt the camera module of this structure, can prevent effectively that the module from taking place the problem of light leak, eliminated the light leak hidden danger, improved the imaging quality of camera module, this kind of camera module simple structure, the preparation is convenient to low cost.

Drawings

FIG. 1 is a schematic cross-sectional view of an FPC structure for preventing light leakage according to the present invention;

FIG. 2 is a schematic cross-sectional view of a camera module according to the present invention;

as shown in the figure: 1. a steel sheet; 2. reinforcing glue; 3. a protective film; 4. an FPC base material; 5. a light-shielding layer; 6. a lens mount; 7. a lens; 8. FPC structure body.

Detailed Description

The invention is further described below with reference to the accompanying drawings in combination with specific embodiments so that those skilled in the art can practice the invention with reference to the description, and the scope of the invention is not limited to the specific embodiments.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and simplicity in description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular manner of operation, and thus, the terms are not to be construed as limiting the invention.

The invention relates to an FPC structure for preventing light leakage, which comprises an FPC structure body 8, wherein the FPC structure body 8 comprises a steel sheet 1 positioned at the lowest layer, a reinforcing glue 2 covered on the upper surface of the steel sheet 1, a protective film 3 covered on the upper surface of the reinforcing glue 2, an FPC base material 4 covered on the upper surface of the protective film 3 and a shading layer 5 covered on the upper surface of the FPC base material 4, wherein the shading layer 5 is made of black ink, and a black ink layer printed on the upper surface of the FPC base material 4 through a printing process.

Adopt this structure, structural at original FPC, add one deck black printing ink layer, this black printing ink layer is located the superiors of FPC structure, just so can effectively solve the problem that the FPC structure takes place the light leak, has eliminated the light leak hidden danger, has improved the imaging quality of camera module, this kind of FPC simple structure, and the preparation is convenient to low cost. Although there are also prior art that involve the use of printing inks to prevent light leakage, green inks are used, which are not effective in preventing light leakage from FPC structures.

As shown in fig. 1, the black printing ink layer of 2 upper surfaces are glued in the reinforcement for adopting the printing technology printing to protection film 3, protection film 3 in the FPC structure is the black printing ink layer of making through printing technology, translucent yellow protection film 3 among the original technique has been replaced, just so can play the purpose of abundant shading, prevent FPC structure light leak, avoid camera module light leak problem to produce, not only do not increase the module cost, the module light leak problem has effectively been solved in addition, module light leak hidden danger has been eliminated, the holistic formation of image quality of module has been improved.

FPC substrate 4 is including covering the protective film glue of protective film 3 upper surface, the first copper layer of electroplating of covering at the protective film glue upper surface, cover at the first copper layer of electroplating on copper layer upper surface, cover at the basic thin layer of first copper layer upper surface, cover at the second copper layer of basic thin layer upper surface and cover at the second copper layer of electroplating on second copper layer upper surface, adopt this structure, can guarantee the stability of performance of FPC structure. The specific stacking structure of the FPC structure is shown in Table 1, and the thickness parameters of each layer are also given in Table 1.

Stacking structure of FPC structure	Film thickness parameter (um)
		Light shield (Black ink)	25
Second electroplated copper layer	5
		Second copper layer	10
Base film layer	25
		A first copper layer	10
A first electroplated copper layer	5
		Protective film adhesive	16
Protective film	12.5
		Reinforcing glue	40
Steel sheet	150

TABLE 1

As shown in fig. 2, the present invention further provides a camera module, which includes the FPC structure body 8, the lens mount 6 located above the FPC structure body 8, and the lens 7 located in the lens mount 6, and the camera module adopting the structure can effectively prevent the module from light leakage, eliminate hidden trouble of light leakage, and improve the imaging quality of the camera module.

Claims

1. The utility model provides a prevent FPC structure of light leak, includes FPC structure body (8), its characterized in that: the FPC structure body (8) comprises a steel sheet (1) located at the lowest layer, a reinforcing rubber (2) covering the upper surface of the steel sheet (1), a protective film (3) covering the upper surface of the reinforcing rubber (2), an FPC base material (4) covering the upper surface of the protective film (3) and a shading layer (5) covering the upper surface of the FPC base material (4), wherein the shading layer (5) is a black ink layer manufactured through a printing process.

2. The FPC structure for preventing light leakage of claim 1, wherein: the protective film (3) is a black ink layer printed on the upper surface of the reinforcing glue (2) by adopting a printing process.

3. A light leakage prevention FPC structure as claimed in claim 1 or claim 2, wherein: the FPC base material (4) comprises a protective film adhesive covered on the upper surface of the protective film (3), a first copper electroplating layer covered on the upper surface of the protective film adhesive, a first copper layer covered on the upper surface of the first copper electroplating layer, a base thin film layer covered on the upper surface of the first copper layer, a second copper layer covered on the upper surface of the base thin film layer and a second copper electroplating layer covered on the upper surface of the second copper layer.

4. The utility model provides a camera module which characterized in that: comprising the FPC construction body (8) of any one of claims 1 to 3, a lens holder (6) located over the FPC construction body (8), and a lens (7) located within the lens holder (6).