JP2003131112A - Camera module and manufacturing method thereof - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a camera module that can be manufactured with a stable yield even when a lens holder and a molded body are bonded with an adhesive, and a manufacturing method thereof. A camera module includes a molded body 6 to which an imaging element 10 is attached and a lens holder 4 attached to the molded body 6 while holding an imaging lens 2. An adhesive is filled between the lens holder 4 and the molded body 6 through a notch 4 a provided on the side surface of the lens holder 4, and the lens holder 4 is joined to the molded body 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to an image pickup apparatus, and more particularly to a camera module which is an image pickup apparatus including an image pickup element and an image pickup lens.

[0002]

2. Description of the Related Art In recent years, a camera module in which an image pickup lens and an image pickup element are integrated has been required to be used as a camera system including a signal processing system for mounting on a small information terminal such as a personal computer or a portable videophone. ing. Along with this, there is an increasing demand for further miniaturization of camera modules.

As a camera module that can be miniaturized,
There is known a camera module in which an imaging element is mounted on one surface of a resin molded body having a through hole for receiving light, and an imaging lens is attached to the other surface side of the resin molding to be integrated. Here, the image sensor detects the light passing through the through hole of the resin molded body on the surface of the element provided with the light receiving portion and the microlens, and photoelectrically converts the detected light into an image signal obtained as a signal. Supply to the processing circuit. The signal processing circuit processes the image signal and displays the image on a screen such as a display.

The distance between the image pickup lens and the light receiving portion of the image pickup element must be accurately determined based on the focal length of the image pickup lens. That is, the image pickup lens needs to be accurately positioned with respect to the light receiving surface of the image pickup element. Therefore, the mounting structure of the imaging lens is configured to be close to or away from the image sensor. For example, the image pickup lens is screwed to a resin molded body on which the image pickup element is mounted, and the distance between the image pickup lens and the image pickup element can be finely adjusted by rotating the image pickup lens.

[0005]

The method for finely adjusting the position of the imaging lens by screw connection or the like complicates the structure of the resin molded body and requires a lens position adjusting step in the assembly process. There is a demand for the development of a camera module in which the distance between the imaging lens and the image sensor can be precisely set without fine adjustment.

Therefore, there has been proposed a structure in which an image pickup lens is attached to a lens holder, an image pickup element is mounted on a resin molded body, and the lens holder and the resin molded body are fixed with an adhesive.

However, the thickness of the adhesive between the lens holder and the resin molded body affects the distance between the image pickup lens and the image pickup element, and if the thickness of the adhesive varies, the image pickup lens is formed. It becomes difficult to accurately set the distance between the image pickup device and the image pickup device to a design value, which causes deterioration of image quality. Further, if there is a partial variation in the thickness of the adhesive in the same camera module, the lens holder and the resin molded body are fixed in a slightly inclined state, and in this case also the image quality is degraded. There is also the problem of leaving.

The present invention has been made in view of the above points, and provides a camera module and a manufacturing method thereof which can be manufactured with a stable yield even when a lens holder and a resin molded body are bonded with an adhesive. The purpose is to

[0009]

In order to solve the above problems, the present invention is characterized by taking the following means.

According to a first aspect of the present invention, there is provided a camera module having a resin molded body to which an image pickup device is attached and a lens holder attached to the resin molded body while holding an imaging lens. A cutout portion is provided on at least a part of a side surface of the lens holder, and the lens holder is provided with the resin molded body by an adhesive supplied between the lens holder and the resin molded body through the cutout portion. It is characterized by being joined to.

According to the first aspect of the present invention, the upper surface of the resin molding is exposed by the notch, and the adhesive is supplied to the exposed surface so that the adhesive is applied between the lens holder and the resin molding. Are filled by capillarity. This facilitates the supply of the adhesive and allows the adhesive to be uniformly filled.

According to a second aspect of the present invention, there is provided a camera module having a resin molded body to which an image pickup element is attached and a lens holder attached to the resin molded body while holding an imaging lens. The lens holder has a protrusion on the bottom surface that faces the resin molded body, and when the protrusion contacts the resin molded body, a gap is formed between the lens holder and the resin molded body. The lens holder is bonded to the resin molded body by an adhesive filled in.

According to the second aspect of the present invention, the gap formed between the lens holder and the resin molded body by the protrusion height of the protrusion is defined by the protrusion height of the protrusion. The thickness can be set uniformly.

According to a third aspect of the present invention, in the camera module according to the second aspect, the protrusions are three columnar protrusions formed on the bottom surface of the lens holder, and the protrusion heights of the protrusions are three. Are characterized by equality.

According to the third aspect of the present invention, since the three columnar protrusions are always in contact with the upper surface of the resin molded body, the lens holder can be placed on the resin molded body without rattling. It is possible to form a gap having a uniform width.

According to a fourth aspect of the present invention, in the camera module according to the second aspect, the projecting portion surrounds a through hole that is formed in the resin molded body and allows light from the imaging lens to pass therethrough. It is characterized by being formed.

According to the fourth aspect of the present invention, the adhesive that flows into the gap between the lens holder and the resin molded body does not flow inside the protruding portion, but the adhesive flows onto the image pickup element. Can be prevented.

According to a fifth aspect of the present invention, there is provided a camera module having a resin molded body to which an image pickup device is attached, and a lens holder attached to the resin molded body while holding an imaging lens. The resin forming body has a groove portion formed on an upper surface facing the lens holder, and the lens holder is bonded to the resin molded body by an adhesive filled in the groove portion. Is.

According to the fifth aspect of the present invention, the bottom surface of the lens holder and the top surface of the resin molded body can be brought into contact with each other by filling the groove portion only with the adhesive, and the thickness of the adhesive has an imaging lens. It does not affect the distance between the image sensor and the image sensor. Further, the adhesion area becomes uniform, and uniform adhesion strength can be obtained.

According to a sixth aspect of the present invention, there is provided a camera module having a resin molded body to which an image pickup device is attached and a lens holder attached to the resin molded body while holding an imaging lens. At least one of the opposing surfaces of the lens holder and the resin molded body is formed as an inclined surface having a high outer peripheral portion and a lower inner surface,
The lens holder is joined to the resin molded body by an adhesive agent filled in a space formed by the inclined surface.

According to the sixth aspect of the present invention, even if the bottom surface of the lens holder and the outer peripheral portion of the upper surface of the resin molded body are brought into contact with each other, a space is formed inside due to the inclined surface. Can be filled. Therefore, the thickness of the adhesive does not affect the distance between the imaging lens and the imaging element. In addition, the adhesive does not stick out of the resin molded body and the lens holder.

According to a seventh aspect of the present invention, there is provided a camera module having a resin molded body to which an image pickup element is attached, and a lens holder attached to the resin molded body while holding an imaging lens. A notch portion is provided on at least a part of a side surface of the lens holder, and the lens holder is joined to the resin molded body by an adhesive applied to the notch portion. .

According to the invention of claim 7, the adhesive can be applied over the side surface of the cutout portion and the upper surface of the resin molded body exposed by the cutout portion, whereby the lens holder is resin-molded. Can be joined to the body. Therefore, the thickness of the adhesive does not affect the distance between the imaging lens and the imaging element.

The invention according to claim 8 is the camera module according to any one of claims 1 to 7, wherein a positioning protrusion is formed on one of the surfaces of the lens holder and the resin molded body facing each other. However, a positioning hole into which the positioning protrusion fits is formed on the other side.

According to the eighth aspect of the present invention, the lens holder can be easily positioned with respect to the resin molded body, and the lens holder will not be displaced in the bonding step with the adhesive. Further, it is possible to prevent the lens holder from being assembled in the wrong direction.

The invention described in claim 9 is the method for manufacturing a camera module according to any one of claims 5 to 7, wherein in the step of bonding the lens holder to the resin molding with an adhesive, The lens holder is pressed against the resin molded body.

According to the ninth aspect of the invention, since the lens holder is kept in contact with the resin molding in the step of joining with the adhesive, the distance between the image pickup lens and the image pickup element can be accurately set. Can be set.

According to a tenth aspect of the present invention, in the method for manufacturing a camera module according to the seventh aspect, the lens holder is placed on the resin molded body, and the lens holder is attached to the resin molded body. The adhesive is applied to the cutout portion of the lens holder in a state where the lens holder is pressed, and the adhesive is cured in a state where the lens holder is pressed against the resin molded body. is there.

According to the tenth aspect of the invention, since the bottom surface of the lens holder is kept in contact with the top surface of the resin molded body in the step of joining with the adhesive, the gap between the imaging lens and the imaging element is maintained. The distance can be set accurately.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. 1A and 1B are views showing a camera module according to a first embodiment of the present invention, wherein FIG. 1A is a plan view thereof and FIG. 1B is a sectional view thereof.

The camera module according to the first embodiment of the present invention includes a lens holder 4 having an imaging lens 2 attached thereto.
And a resin molded body (resin molded body) 6 to which the lens holder 4 is fixed, and a substrate 8 to which the molded body 6 is attached. An opening 8a is formed in a portion of the substrate 8 where the molded body 6 is mounted, and the molded body 6 is arranged in a state where the image pickup device 10 is arranged in the opening 8a.
Attached to.

A resin protrusion 6b is formed on the bottom surface 6a of the molded body 6, and a metal film 12 is formed on the surface of the resin protrusion 6b. The resin protrusion 6b and the metal film 12 function as a protrusion electrode, and the molded body 6 is mounted on the substrate 8 via the protrusion electrode. In addition, the bottom surface 6a of the molded body 6
Is formed with the electrode pad connected to the metal film 12 exposed on the surface. The image pickup device 10 is flip-chip mounted on the molded body 6 by joining the metal bumps 10a to the electrode pads.

The substrate 8 comprises a polyimide film 8A as a base and a wiring pattern 8B formed thereon. The thickness of the substrate 8B is sufficiently smaller than the thickness of the image pickup device 10, and the thickness of the entire camera module shown in FIG. 1, that is, the lens holder 4, the molded body 6, and the image pickup device 10.
And does not affect the overall thickness. Therefore, the thickness of the camera module according to the present embodiment does not include the thickness of the substrate 8, and the reduction in thickness is achieved.

In the camera module having the above structure, the lens holder 4 is fixed to the molded body 6 via the adhesive 14. In this embodiment, the lens holder 4 has a rectangular planar shape, and notches 4a are provided on the four sides of the rectangle. The cutout portion 4a is provided to facilitate the application of the adhesive 14.

FIG. 2 is a view showing the lens holder 4,
(A) is the top view, (b) is a bottom view. In addition, the imaging lens 2 is incorporated inside the lens holder 4,
The IR filter 16 is previously attached to the lower side of the imaging lens.

In order to supply the adhesive 14 between the lens holder 4 and the molded body 6, a method of applying the liquid adhesive 4 to the surface of the molded body 6 in advance and then mounting the lens holder 4 is used. , The lens holder 4 and the molded body 6
Then, the liquid adhesive 14 is supplied from the side surface into the gap between the lens holder 4 and the molded body 6 to be filled therein.

In the method of applying the adhesive agent 14 in advance,
The adhesive may stick out to the outside or inside of the molded body, and may affect the light receiving surface of the image sensor 10. Therefore, the method of pouring the adhesive later is preferable. However, when the adhesive 14 is poured from the gap between the side surfaces, the adhesive may not spread all over the joint surface, which may lead to insufficient adhesive strength.

Therefore, in this embodiment, the lens holder 4 is provided with the notch 4a, and when the lens holder 4 is incorporated into the molded body 6, a part of the upper surface of the molded body 6 is notched. It is configured to be exposed in 4a. In order to supply the adhesive 14, a proper amount of the liquid adhesive 14 may be supplied to the upper surface of the molded body 6 exposed in the cutout portion 4a. The liquid adhesive 14 flows into the gap between the lens holder 4 and the molded body 6 due to the capillary phenomenon, and fills the entire gap.

Since the capillary phenomenon is used, even if the amount of the adhesive agent supplied is too large, the adhesive agent does not pass through the gap to the outside or inside of the molded body 6.
Excess adhesive remains in the cutout 4a and is cured in the cutout 4a.

3A and 3B are views showing a modified example of the lens holder 4, where FIG. 3A is a plan view thereof and FIG. 3B is a bottom view thereof. In the modification shown in FIG. 3, the notch 4a is formed in an arc shape. 4A and 4B are views showing another modification of the lens holder 4, where FIG. 4A is a plan view thereof and FIG. 4B is a bottom view thereof. In the modification shown in FIG. 4, the cutouts 4a are formed at four corners of the rectangular lens holder 4.

Next, a camera module according to a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a sectional view of a camera module according to a second embodiment of the present invention. 5, parts that are the same as the parts shown in FIG. 1 are given the same reference numerals, and descriptions thereof will be omitted.

The camera module according to the second embodiment of the present invention has basically the same configuration as the camera module according to the first embodiment described above, except that a projection 4Aa is provided on the bottom surface of the lens holder 4A. The protrusion 4Aa is provided with an adhesive 14 between the lens holder 4Aa and the molded body 6.
Is provided to form a gap that fills.

FIG. 6 is a view showing the lens holder 4A,
(A) is the top view, (b) is a bottom view. As shown in FIG. 4B, the protrusion 4Aa is provided on the lens holder 4
It is a small columnar protrusion formed at three locations on the bottom surface of Aa. The protrusion height of the protrusions 4Aa sets the gap filled with the adhesive 14, so the protrusion height of the protrusions 4Aa is, for example, 30 μm to 50 μm, but is determined based on the characteristics of the adhesive 14 used. However, for example, 30 μm
It is preferably ˜50 μm. Here, the protrusion 4A
The number of a may be three or more, but in order to stably mount the lens holder 4A on the molded body 6 without rattling, as shown in FIG. It is preferable to form them at three locations separated from each other.

In this embodiment, the lens holder 4
A has the cutout portion 4a similarly to the lens holder 4 according to the first embodiment described above, but it is not necessary to provide the cutout portion 4a and the projection portion 4Aa at the same time, and the cutout portion 4a is provided. Even if it does not exist, the effect of the protrusion 4Aa does not change.

FIG. 7 is a bottom view showing a modified example of the lens holder 4A. In the modification shown in FIG. 7A, the protrusion 4Ab (the hatched portion in the drawing) is the lens holder 4A.
Are formed at the four corners of the bottom surface of the. In the modification shown in FIG. 7B, the protrusion 4Ac (hatched portion in the drawing) is formed so as to surround the central opening of the lens holder 4A. Further, in the modified example shown in FIG. 7C, the portion excluding the four corners of the bottom surface of the lens holder 4A is the protrusion 4A.
d (hatched portion in the figure).

As in this embodiment, the adhesive 1 is formed by the protrusions.
4 by setting a gap filled with adhesive 14
Since the thickness of the film is always uniform, a stable adhesive force can be obtained. Further, since the thickness of the adhesive 14 is uniform, the distance between the image pickup lens 2 and the image pickup element can be set accurately, and the deterioration of the image can be prevented. Further, since it is not necessary to consider the thickness of the adhesive, the camera module can be easily designed.

Next, a camera module according to a third embodiment of the present invention will be described with reference to FIG. FIG. 8 is a sectional view of a camera module according to a third embodiment of the present invention. 8, parts that are the same as the parts shown in FIGS. 1 and 5 are given the same reference numerals, and descriptions thereof will be omitted.

The camera module according to the third embodiment of the present invention has basically the same structure as the camera module according to the first and second embodiments, but has a positioning protrusion 4Ba on the bottom surface of the lens holder 4B. And molded body 6
The difference is that the upper surface of A has a positioning hole 6Aa. By fitting the positioning protrusion 4Ba into the positioning hole 6Aa, the lens holder 4B is positioned in the horizontal direction with respect to the molded body 6.

FIG. 9 is a sectional view of the lens holder 4B.
FIG. 10 is a bottom view of the lens holder. Positioning protrusion 4
Ba is a columnar pin and is formed at two positions on the bottom surface of the lens holder.

The protrusion height of the positioning protrusion 4Ba from the bottom surface of the lens holder 4B is higher than the protrusion height of the protrusion 4Aa, and is, for example, about 100 μm. FIG. 11 is a plan view of the molded body. As shown in FIG. 11, the positioning protrusion 4B of the lens holder 4B is provided on the upper surface of the molded body.
A positioning hole 6Aa is provided at a position corresponding to a. That is, with the lens holder 4B attached to the molded body 6A, the positioning protrusions 4Ba are aligned with the positioning holes 6
Fit to Aa. Thereby, the lens holder 4B is accurately positioned with respect to the molded body 6A, and the imaging lens 2 attached to the lens holder 4B is accurately positioned with respect to the imaging element 10 mounted on the molded body 6A. can do.

Further, the positioning protrusion 4Ba is provided on one side of the lens holder 4B, and the positioning protrusion 4Ba does not fit into the positioning hole 6Aa even when the lens holder 4B is mounted on the molded body 6A with the right and left reversed. Therefore, it cannot be installed properly. Therefore, it is possible to prevent the lens holder 4B from being assembled in the wrong direction.

In this embodiment, the lens holder 4B is fitted with the positioning protrusion 4Ba in the positioning hole 6Aa.
The adhesive 14 is filled in the gap between the mold and the molded body 6A. Therefore, in the step of filling the adhesive 14,
The position of the lens holder 4B and the molded body 6A is not displaced, and the adhesive 14 can be reliably filled.

The number of the positioning protrusions 4Ba is not limited to two and may be three or more, or may be one as described later. When a plurality of positioning protrusions 4Ba are provided, it is preferable that the positioning protrusions 4Ba are located as far apart from each other as possible in order to improve the positioning accuracy.

FIG. 12 is a bottom view showing a modified example of the lens holder 4B, and FIG. 13 is a plan view of a molded body corresponding to the lens holder shown in FIG. In the modification shown in FIG. 12, only one positioning protrusion 4Bb is provided and its shape is a square horizontal cross section. Therefore, FIG.
The molded body 6A shown in is provided with a positioning hole 6Ab having a square horizontal section. As described above, if the positioning protrusion 4Bb has a square horizontal section, the positioning in the rotation direction can be performed by one positioning protrusion. The shape of the horizontal cross section is not limited to a square, and other polygons such as a triangle and a pentagon may be adopted.

Further, in the above-mentioned embodiment, the positioning protrusion is formed on the lens holder and the positioning hole is provided on the molded body. On the contrary, the positioning protrusion is formed on the molded body and the positioning hole is formed. May be provided on the lens holder.

Further, the positioning mechanism including the positioning projections and the positioning holes in this embodiment is the same as the above first and second positioning mechanisms.
It may be applied to the embodiment, and may be used for each embodiment described later.

Next, a camera module according to the fourth embodiment of the present invention will be described with reference to FIG. Figure 1
4 is a plan view of a molded body of a camera module according to a fourth embodiment of the present invention. The configuration of the camera module according to the fourth embodiment of the present invention is the same as that of the camera module shown in FIG. 1 except for the molded body, and the description thereof will be omitted.

The molded body 6B shown in FIG. 14 is characterized by having a groove portion 6Ba (a hatched portion in the drawing) on the upper surface. The groove 6Ba functions as a recess filled with the adhesive 14, and for example, the depth of the groove 6Ba is 30 μm.
˜50 μm. A part of the groove 6Ba extends to the side surface of the molded body 6B, and when the lens holder 4 is attached, an opening 6Bb is formed between the molded body 6B and the lens holder. The adhesive 14 can be supplied to the groove 6Ba from the opening 6Bb.

In the present embodiment, the bottom surface of the lens holder 4 is attached in contact with the top surface of the molded body 6B, and the adhesive 14 is filled only in the groove 6Ba and the opening 6Bb. Therefore, the thickness of the adhesive 14 does not affect the distance between the imaging lens 2 and the imaging element 10. Moreover, since the area of the groove portion 6Ba is constant, the adhesion area can be always constant. A uniform adhesive area and a uniform adhesive force can be obtained.

Next, a camera module according to a fifth embodiment of the present invention will be described with reference to FIG. Figure 1
5 is a sectional view of a camera module according to a fifth embodiment of the present invention. 15, parts that are the same as the parts shown in FIG. 1 are given the same reference numerals, and descriptions thereof will be omitted.

The camera module according to the fifth embodiment of the present invention has basically the same structure as the camera module according to the first embodiment described above, but the shape of the bottom surface of the lens holder 4C is different.

The bottom surface of the lens holder 4C is an inclined surface having a high outer peripheral portion and a lower peripheral portion.
Therefore, with the lens holder 4C attached to the molded body 6, only the outer peripheral portion of the bottom surface of the lens holder 4c contacts the upper surface of the molded body 6, and a space (gap) is formed inside thereof. In this embodiment, the space formed in this way is filled with the adhesive 14, and the lens holder 4C
Is fixed to the molded body 6. Therefore, the adhesive 1
4 is supplied before the lens holder 4C is attached to the molded body 6.

FIG. 16 is a diagram for explaining a process of attaching the lens holder 4C to the molded body. First,
As shown in FIG. 16A, an appropriate amount of adhesive 14 is applied to the upper surface of the molded body 6 on which the image sensor 10 is mounted and which is mounted on the substrate 8. The adhesive is applied using the dispenser 20 or the like. Alternatively, the adhesive may be applied by printing. Next, as shown in FIG.
The lens holder 4C is mounted on the molded body 6.
The applied adhesive agent 14 is enclosed and filled in the space formed between the bottom surface of the lens holder 4C and the upper surface of the molded body 6.

At this time, it is preferable to apply pressure to the lens holder 4C and press it against the molded body 6 until the adhesive 14 is cured. The pressing of the lens holder 4C is performed using a clamp jig or the like. By pressing the lens holder 4C, the lens holder 4C can be fixed to the molded body 6 while the outer peripheral portion of the bottom surface of the lens holder 4C is in contact with the upper surface of the molded body 6. Therefore, the thickness of the adhesive 14 depends on the image pickup lens 2 and the image pickup device 10.
It does not affect the distance between. Further, since the outer peripheral portion of the bottom surface of the lens holder 4C is in contact with the upper surface of the molded body 6, the adhesive 14 does not stick out of the molded body 6.

Next explained is a camera module according to the sixth embodiment of the invention. FIG. 17 is a plan view of a camera module according to the sixth embodiment of the present invention, and FIG. 18 is a view for explaining a manufacturing process of the camera module according to the sixth embodiment of the present invention. 17 and 18, parts that are the same as the parts shown in FIG. 1 are given the same reference numerals, and descriptions thereof will be omitted.

The camera module according to the sixth embodiment of the present invention basically has the same structure as the camera module according to the first embodiment described above, except that the adhesive 14 is applied to the lens holder 4 and the molded body 6. Instead of filling between
They are different in that they are cured while being in contact with the outer peripheral portion of the lens holder and the upper surface of the molded body 6.

Specifically, as shown in FIG.
The adhesive 14 is supplied to the cutout portion 4a of the lens holder 4, and is held in a state of contacting and adhering to the inner side surface of the cutout portion 4a and the upper surface of the molded body 6. Therefore, the adhesive used in this embodiment does not have such a low viscosity that it enters between the lens holder 4 and the molded body 6 due to a capillary phenomenon like the adhesive used in the above-mentioned first embodiment, It has a very high viscosity.

The step of joining the lens holder 4 to the molded body 6 with the adhesive 14 includes the step of supplying the adhesive 14 to the cutout portion 4a and the step of curing the adhesive 14. During this joining step, it is preferable to press the lens holder 4 against the molded body 6 as shown in FIG. 18 (b). FIG. 19 is a diagram showing an example of a pressing mechanism that presses the lens holder 4 against the molded body 6. The pressing mechanism includes the stage 22 for mounting the substrate 8 on which the molded body 6 is mounted, and the lens holder 4
And a pressing tool 24 for applying a pressing force to the. The stage 22 is provided with a recess for accommodating the image sensor 10.

According to the present embodiment, since the adhesive 14 does not exist between the lens holder 4 and the molded body 6, the thickness of the adhesive 14 is the distance between the imaging lens 2 and the imaging element 10. It has no effect.

As described above, according to the present invention, various effects described below can be realized.

According to the first aspect of the present invention, the upper surface of the resin molding is exposed by the notch, and the adhesive is supplied to the exposed surface so that the adhesive is applied between the lens holder and the resin molding. Are filled by capillarity. This facilitates the supply of the adhesive and allows the adhesive to be uniformly filled.

According to the second aspect of the present invention, the gap formed between the lens holder and the resin molding by the protrusion height of the protrusion is defined by the protrusion height of the protrusion. The thickness can be set uniformly.

According to the third aspect of the present invention, since the three columnar protrusions are always in contact with the upper surface of the resin molded body, the lens holder can be placed on the resin molded body without rattling. It is possible to form a gap having a uniform width.

According to the fourth aspect of the present invention, the adhesive flowing into the gap between the lens holder and the resin molded body does not flow into the inside of the protruding portion, but the adhesive flows into the image pickup element. Can be prevented.

According to the fifth aspect of the present invention, the bottom surface of the lens holder and the top surface of the resin molded body can be brought into contact with each other by filling the groove portion only with the adhesive, and the thickness of the adhesive has an imaging lens. It does not affect the distance between the image sensor and the image sensor. Further, the adhesion area becomes uniform, and uniform adhesion strength can be obtained.

According to the sixth aspect of the invention, even if the bottom surface of the lens holder and the outer peripheral portion of the upper surface of the resin molded body are brought into contact with each other, a space is formed inside due to the inclined surface. Can be filled. Therefore, the thickness of the adhesive does not affect the distance between the imaging lens and the imaging element. In addition, the adhesive does not stick out of the resin molded body and the lens holder.

According to the seventh aspect of the invention, the adhesive can be applied over the side surface of the cutout portion and the upper surface of the resin molded body exposed by the cutout portion, whereby the lens holder is resin-molded. Can be fixed to the body. Therefore, the thickness of the adhesive does not affect the distance between the imaging lens and the imaging element.

According to the eighth aspect of the present invention, the lens holder can be easily positioned with respect to the resin molded body, and the lens holder will not be displaced in the bonding step with the adhesive. Further, it is possible to prevent the lens holder from being assembled in the wrong direction.

According to the ninth aspect of the invention, since the lens holder is kept in contact with the resin molding in the step of joining with the adhesive, the distance between the image pickup lens and the image pickup element can be accurately set. Can be set.

According to the tenth aspect of the invention, since the bottom surface of the lens holder is kept in contact with the top surface of the resin molded body in the step of joining with the adhesive, the gap between the imaging lens and the imaging element is maintained. The distance can be set accurately.

[Brief description of drawings]

FIG. 1 is a diagram showing a camera module according to a first embodiment of the present invention, (a) is a plan view thereof, and (b) is a sectional view thereof.

FIG. 2 is a diagram showing the lens holder shown in FIG.
(A) is the top view, (b) is a bottom view.

FIG. 3 is a diagram showing a modified example of a lens holder, (a)
Is a plan view thereof, and (b) is a bottom view.

FIG. 4 is a diagram showing another modification of the lens holder,
(A) is the top view, (b) is a bottom view.

FIG. 5 is a sectional view of a camera module according to a second embodiment of the present invention.

FIG. 6 is a view showing the lens holder shown in FIG. 5, (a)
Is a plan view thereof, and (b) is a bottom view.

7 is a bottom view showing a modified example of the lens holder shown in FIG.

FIG. 8 is a sectional view of a camera module according to a third embodiment of the present invention.

9 is a cross-sectional view of the lens holder shown in FIG.

10 is a bottom view of the lens holder shown in FIG.

FIG. 11 is a plan view of the molded body shown in FIG.

FIG. 12 is a bottom view showing a modified example of the lens holder.

13 is a plan view of a molded body corresponding to the lens holder shown in FIG.

FIG. 14 is a plan view showing a molded body of a camera module according to a fourth embodiment of the present invention.

FIG. 15 is a sectional view of a camera module according to a fifth embodiment of the present invention.

16 is a diagram for explaining a step of attaching the lens holder shown in FIG. 15 to a molded body.

FIG. 17 is a plan view of a camera module according to a sixth embodiment of the present invention.

FIG. 18 is a diagram illustrating a manufacturing process of the camera module according to the sixth embodiment of the present invention.

FIG. 19 is a diagram showing an example of a pressing mechanism that presses the lens holder against the molded body.

[Explanation of symbols]

2 Imaging lens 4,4A, 4B, 4C Lens holder 4a Notch 4Aa, 4Ab, 4Ac, 4Ad Protrusion 4Ba, 4Bb Positioning protrusion 6,6A, 6B Molded body 6Aa, 6Ab Positioning hole 6a bottom 8 substrates 8A polyimide film 8B wiring pattern 10 Image sensor 10a metal bump 12 metal film 14 Adhesive 16 IR filter

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Izumi Kobayashi             4-1, Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa             No. 1 within Fujitsu Limited (72) Inventor Hiroshi Aoki             4-1, Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa             No. 1 within Fujitsu Limited (72) Inventor Toshiyuki Honda             4-1, Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa             No. 1 within Fujitsu Limited F-term (reference) 2H044 AA02 AE01 AJ03 AJ04 AJ06

Claims (10)

[Claims] 1. A camera module having a resin molded body to which an image pickup element is attached, and a lens holder attached to the resin molded body while holding an imaging lens, wherein at least a side surface of the lens holder is provided. A cutout portion is provided in a part, and the lens holder is bonded to the resin molded body by an adhesive supplied between the lens holder and the resin molded body through the cutout portion. A camera module characterized by being 2. A camera module having a resin molded body to which an image pickup device is attached, and a lens holder mounted to the resin molded body while holding an imaging lens, wherein the lens holder is the resin molded body. A protrusion is formed on the bottom surface facing the body, and a gap is formed between the lens holder and the resin molded body by the protrusion contacting the resin molded body, and the adhesive filled in the gap. According to the camera module, the lens holder is joined to the resin molded body. 3. The camera module according to claim 2, wherein the protrusions are three columnar protrusions formed on the bottom surface of the lens holder, and have the same protrusion height. Camera module to be used. 4. The camera module according to claim 2, wherein the protrusion is formed in the resin molded body so as to surround a through hole that allows light from the imaging lens to pass therethrough. And the camera module. 5. A camera module comprising: a resin molded body to which an image pickup device is attached; and a lens holder attached to the resin molded body while holding an imaging lens, wherein the resin formed body is the lens. A camera module having a groove portion formed on an upper surface facing the holder, wherein the lens holder is bonded to the resin molded body by an adhesive agent filled in the groove portion. 6. A camera module having a resin molded body to which an image pickup device is attached and a lens holder attached to the resin molded body while holding an imaging lens, wherein the lens holder and the resin molded body are provided. At least one of the facing surfaces of the body is formed as an inclined surface having a high outer peripheral portion and a lower inner surface, and the lens holder is formed of the resin by an adhesive agent filled in a space formed by the inclined surface. A camera module characterized by being joined to the body. 7. A camera module having a resin molded body to which an image pickup element is attached, and a lens holder attached to the resin molded body while holding an imaging lens, wherein at least a side surface of the lens holder is provided. A camera module, wherein a notch is provided in a part, and the lens holder is joined to the resin molded body by an adhesive applied to the notch. 8. The camera module according to claim 1, wherein a positioning protrusion is formed on one of surfaces of the lens holder and the resin molded body which face each other, and the positioning protrusion is formed on the other surface. A camera module having a positioning hole into which a protrusion fits. 9. The method of manufacturing a camera module according to claim 5, wherein in the step of joining the lens holder to the resin molded body with an adhesive, the lens holder is made of the resin. A method for manufacturing a camera module, which comprises pressing against a molded body. 10. The method of manufacturing a camera module according to claim 7, wherein the lens holder is placed on the resin molded body, and the lens holder is pressed against the resin molded body, A method of manufacturing a camera module, wherein an adhesive is applied to the cutout portion of the lens holder, and the adhesive is cured while the lens holder is pressed against the resin molded body.