KR100769726B1 - Camera module package - Google Patents

Abstract

A camera module package is provided to employ the material of an adhesive agent which bonds a lens housing to a substrate as a soft material of ASTM D4420 SHORE D60 or less. A camera module package includes a substrate(3) and a lens housing(5). The substrate is provided with an image sensor(2). The lens housing(5) is provided with a lens barrel on the upper portion of the substrate(3). The lens housing(5) is bonded to the substrate(3) by a flexible adhesive agent having shore hardness of D60 or less based on an ASTM D4220 standard. The adhesive agent is coated on the rim of the substrate(3) making contact with a contact surface of the lens housing(5). The adhesive agent includes an epoxy resin-based material.

Description

Camera Module Package {CAMERA MODULE PACKAGE}

1 is an exploded perspective view of a camera module package according to the prior art.

Figure 2 is a front view showing a state after performing the drop test for the camera module package according to the prior art.

3 is an exploded perspective view of the camera module package according to the present invention.

4 is an exploded perspective view of another embodiment of the camera module package to which the present invention is applied.

<Description of Major Symbols in Drawing>

1: Lens barrel 2: Image sensor

3: substrate 4: actuator

5: lens housing 6: cover tape

7: IR filter 8: adhesive

The present invention relates to a camera module package, and more particularly, to a mobile camera module package that can ensure the reliability in the fall and impact.

Recently, due to the rapid development of information and communication technology, the improvement of data communication speed and the increase of data communication amount are realized, and the imaging devices such as CCD image sensor and CMOS image sensor are mounted on mobile electronic devices such as mobile phones and laptops. It is spread | distributing and these can transmit the image data image | photographed by the camera module package besides text data by real-time process. In addition, recently, as the camera module package for mobile devices has become high pixels and high functionalities, rapid technological developments that are similar to those of general high-end digital cameras are underway. Attempts have been made to implement a mobile-size device, and among them, the mainstream is a camera module package that performs autofocusing using an actuator of a voice coil motor (VCM) type.

As shown in FIG. 1, a camera module package including an actuator, which is one of the autofocusing units, includes a lens barrel (1) largely equipped with a lens group and an image for passing an image through the lens barrel (1). An image sensor 2, a substrate 3 on which the image sensor 2 is provided, and an actuator provided on an upper portion of the substrate 3 to move the lens barrel 1 up and down for autofocusing operation ( 4) is provided with a lens housing (5).

In addition, a cover tape 6 is provided on an upper portion of the lens barrel 1 to prevent foreign matter from penetrating into the condensing lens side, and the lens barrel is disposed between the image sensor 2 and the lens housing 5. An IR filter 7 is provided to block infrared rays of excessive long wavelengths flowing into the image sensor 2 from 1).

In addition, the lens housing 5 is mainly provided with an actuator 4 as one of the autofocusing units for implementing the autofocusing function of the camera module package, such an actuator 4 is generally Japanese Patent Laid-Open No. 2004 An actuator that supports the driving unit by adjusting the restoring force of the spring shown in -280031 and the like and performs an autofocusing operation by adjusting the focusing driving degree of the driving unit is commonly used.

Meanwhile, the substrate 3 and the lens housing 5 are adhesively fixed to each other by an adhesive, and the adhesive may be maintained in the bonded state despite the external impact or shaking of the substrate 3 or the lens housing 5. It is attached and supported so that it can be supported.

At this time, as the adhesive according to the prior art, Shore Hardness SHORE D80 or more according to the standard ASTM D4220 specified for plastics, etc. of the American Society for Testing and Materials (ASTM) is used. Shore Hardness The SHORE D80 or higher material corresponds to a hard bonding material, in order to maintain sufficient adhesion strength between the substrate 3 and the lens housing 5.

 On the other hand, as the reliability quality of the external impact of the mobile terminal has recently increased, in particular, the necessity of securing the impact reliability of the camera module package is increased. Durability test items are added to the situation.

However, as mentioned above, when a material of Shore Hardness SHORE D80 or higher is used as an adhesive to adhesively fix the substrate 3 and the lens housing 5, the substrate 3 and the lens housing 5 Although it can maintain the adhesive strength to a certain extent, there is a limit to increase such adhesive strength, and even if the adhesive strength is maintained high, there is a problem that a brittle phenomenon occurs during external impact such as falling.

In particular, an apparatus such as an actuator 4 for adding additional functions such as auto focusing is added to the existing lens housing 5, and is about 3 to 5 times greater than the weight of the camera module package without additional functions (about 0.4 g). The increase in weight (about 1.1 ~ 1.9g) makes it more difficult to secure reliability when dropping or impacting the camera module package.

On the other hand, Figure 2 is a diagram showing such a problem, it shows a photograph showing a state after performing the drop test for the camera module package using a conventional adhesive. That is, as shown in FIG. 2, after performing the drop test, the adhesive part attached between the substrate 3 and the lens housing 5 is broken, so that the substrate 3 and the lens housing 5 are separated from each other. Therefore, it can be confirmed that there is a difficulty in securing the reliability of the product during the drop and impact.

The present invention was derived to solve the above problems, the present invention by using a material having a hardness of less than Shore Hardness (D60) according to the ASTM D4220 standard as an adhesive for assembling the substrate and the lens housing, It is an object of the present invention to provide a camera module package capable of maintaining a predetermined adhesive strength and at the same time absorbing some external shock to secure drop and impact reliability.

Camera package according to an embodiment of the present invention for achieving the above object, a substrate having an image sensor; And a lens housing provided on an upper portion of the substrate and having a lens barrel therein, wherein the lens housing and the substrate have a Shore Hardness D60 or less according to ASTM D4220 standard. It is characterized in that the mutual adhesive fixing through one adhesive.

Here, the adhesive is applied to the substrate, it is preferable to be applied to the edge of the substrate in contact with the adhesive surface of the lens housing.

In addition, the adhesive is made of epoxy resin-based material, it is more preferable that the content of the epoxy resin is 10 to 20%.

On the other hand, the camera module package according to another embodiment of the present invention for achieving the above object, a substrate having an image sensor; And a lens housing provided on an upper portion of the substrate and having a lens barrel therein, and having a unit having an additional function such as an autofocusing unit for auto-focusing in the image sensor. In addition, the lens housing and the substrate, characterized in that the mutual adhesive fixing through a flexible adhesive (Shore Hardness) D60 or less according to ASTM D4220 standard.

In the present invention, the shock is not a material that withstands drops and impacts by adopting the material of the optimal adhesive that serves to fix the substrate and the lens housing in the current structure, without additional components for mechanical reinforcement with respect to the conventional camera module package By applying a soft adhesive material that can absorb the so as to ensure the reliability quality during the drop and impact of the camera module package.

That is, the present invention has been made from the concept of seismic design for earthquake preparedness of a building, and has a technical feature of applying a seismic design for fall and shock even in a camera module package.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when a detailed description of a related well-known configuration or function is apparent to those skilled in the art, or it is determined that the subject matter of the present invention may be obscured, the detailed description thereof will be omitted.

Figure 3 shows an exploded perspective view of the camera module package according to the present invention, Figure 4 shows an exploded perspective view of another type of camera module package to which the present invention is applied. The structure of the camera module package according to the present invention is basically the same as that of a general camera module package as shown in FIG. 1.

That is, referring to FIG. 3, the camera module package according to the present invention also includes a lens barrel 1, an image sensor 2, a substrate 3, an actuator 4, a lens housing 5, and a cover tape 6. ), And an IR filter (7).

The actuator 4 is an actuator 4 which is one of the autofocusing units. In general, the actuator 4 mainly supports the driving unit by using the restoring force of the spring and adjusts the focusing driving degree of the driving unit. do. Of course, the actuator 4 can be applied to various types of actuators.

On the other hand, the lens housing (5) provided with the substrate (3) and the actuator (4) is mutually fixed by an adhesive, the adhesive is the substrate 3 or the lens housing (5) despite the external impact or shaking It is attached and supported to maintain the assembled state.

Hereinafter, an embodiment of the present invention described above will be described in more detail.

Example

In the present embodiment, as shown in Figure 3, the standard ASTM specified for the plastics and the like of the American Society for Testing and Materials (ASTM) as the adhesive (8) for mutually fixing and fixing the substrate 3 and the lens housing (5) Shore Hardness by D4420 It is characterized in that a material of less than SHORE D60 is used. For reference, Shore hardness values are measured using a calibrated hardness tester, the softest material being Shore A, the harder Shore D, and generally materials having a hardness greater than Shore D80 are classified as hard.

That is, as described above, the adhesive used for assembling the substrate 3 and the lens housing 5 with a Shore Hardness SHORE D80 or more according to the related art may maintain the adhesive strength to some extent, but In addition to the limit to increase the adhesive strength, even if the adhesive strength is maintained even if there was a problem that the phenomenon of breaking (Brittling) during the external impact such as falling. However, in the present invention, the material of the adhesive 8, which serves to fix the substrate 3 and the lens housing 5, is selected to be a soft material of ASTM D4420 SHORE D60 or less, and used in the camera module package to absorb external shocks. It can ensure the reliability of the product in case of drop and impact.

In this case, the adhesive 8 may be applied to the substrate 3, and may be evenly applied to the edge portion of the substrate 3, which is in contact with the bottom contact surface of the lens housing 8, from the upper surface of the substrate 3. desirable. That is, as the lower contact surface of the lens housing 5 is formed in a substantially rectangular shape, the adhesive 8 applied to the substrate 3 may also be applied in a rectangular shape so as to correspond to the shape of the lower contact surface of the lens housing 5. desirable.

In addition, the adhesive 8 is made of epoxy resin-based material, it is more preferable that the content of the epoxy resin is 10 to 20%. In other words, by modifying a hard epoxy resin into an epoxy resin having a flexible property and using it as an adhesive for the substrate 3 and the lens housing 5, the adhesive force is increased and the camera module package is used. To absorb and compensate shocks when falling and impacts.

Therefore, the substrate 3 and the lens housing 5 can be prevented from being separated from each other during the drop and impact test of the camera module package, thereby ensuring reliability quality such as improving durability of the camera module package.

On the other hand, the above description has been described in the case where the flexible bonding material of ASTM D4420 SHORE D60 or less adheres the substrate 3 and the lens housing 5, but is not necessarily limited thereto. In other words, if the hard bonding material such as the existing adhesive is broken by the drop and impact can affect the performance of the camera module package, the flexible bonding material of ASTM D4420 SHORE D60 or less can be applied.

Meanwhile, the adhesive 8 of the flexible flexible bonding material of ASTM D4420 SHORE D60 or less of the present invention may be applied to a camera module package having a structure different from that of the camera module package described above. That is, as shown in Figure 4, it may be applied to the case where the housing 50 and the substrate 30 of the general camera module package is not provided with an actuator for autofocusing operation to mutual adhesive fixation. As a result, product reliability against dropping and impact of the camera module package can be further improved.

The above description is merely illustrative of the present invention, and those skilled in the art to which the present invention pertains may various modifications without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed herein are not intended to limit the present invention but to describe the present invention, and the spirit and scope of the present invention are not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all the technologies within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the camera module package according to the present invention, the camera module package against dropping and impact by selecting and using a flexible material of ASTM D4420 SHORE D60 or less as an adhesive material for mutually fixing the substrate and the lens housing It will create an effect that can ensure the reliability of.

Claims (5)

A substrate having an image sensor; And A lens housing provided on an upper portion of the substrate and having a lens barrel mounted therein; The lens housing and the substrate, the camera module package, characterized in that the mutual adhesive fixing through a flexible adhesive (Shore Hardness) D60 or less according to the ASTM D4220 standard. The method of claim 1, The adhesive is applied to the substrate, the camera module package, characterized in that the edge of the substrate is applied in contact with the adhesive surface of the lens housing. The method according to claim 1 or 2, The adhesive is a camera module package, characterized in that made of epoxy (Epoxy) resin-based material. The method of claim 3, The adhesive is a camera module package, characterized in that the content of the epoxy resin 10 to 20%. A substrate having an image sensor; And A lens housing provided on an upper portion of the substrate and having a lens barrel therein, and a unit having an additional function such as an auto focusing unit for auto-focusing in the image sensor; , The lens housing and the substrate, the camera module package, characterized in that the mutual adhesive fixing through a flexible adhesive (Shore Hardness) D60 or less according to the ASTM D4220 standard.

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