Photosensitive assembly, camera module, method for manufacturing camera module, and electronic device

A camera module includes optical lenses, a light filter, a circuit board, a photosensitive chip conductively connected to the circuit board, and a bonding portion. The bonding portion has a lower bonding side, a top bonding surface, and a light path. The lower bonding side of the bonding portion is bonded to a circuit board assembly, and the bonding portion surrounds a photosensitive area of the photosensitive chip, so that the photosensitive area of the photosensitive chip is exposed to the light path of the bonding portion. A periphery of the light filter is bonded to the top bonding surface of the bonding portion, so that the light filter is kept in the light path of the photosensitive chip by the bonding portion. The optical lenses are kept in the photosensitive path of the photosensitive chip, effectively reducing the height of the camera module.

TECHNICAL FIELD

The invention relates to field of optical imaging, in particular to a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device.

BACKGROUND ART

In recent years, smart devices, such as smart phones, have become increasingly lighter, thinner, and more high-performance. This development trend of smart devices has raised more demanding requirements for the size and imaging capabilities of the camera module, which is one of the standard configurations of smart devices.

In terms of hardware, the imaging capability of the camera module depends on the number and size of the electronic components in the circuit and the parameters of the photosensitive chip, for example, the size of the photosensitive surface of the photosensitive chip. In other words, the number and size of electronic components and the parameters of the photosensitive chip are the basis for improving the imaging capability of the camera module. However, the existing technology for packaging camera modules has greatly increased the size of camera modules with a greater number and higher size of electronic components and photosensitive chips with better parameters, as a result, the development trend of the size of the high-performance camera modules is contrary to the development trend of the smart devices.

FIG.1shows a typical camera module in the prior art, which includes a circuit board1P, a set of electronic components2P, a photosensitive chip3P, a lenses holder4P, a light filter5P, a lenses bearing portion6P, and a lenses7P. Firstly, a set of the electronic components2P are mounted on the circuit board1P at intervals; secondly, the photosensitive chip3P is mounted on the circuit board1P, and the photosensitive chip3P is conductively connected to the circuit board1P through at least one set of gold wires8P, wherein a set of the electronic components2P surrounds the photosensitive chip3P; thirdly, the lenses holder4P is mounted on the circuit board1P by surrounding the photosensitive chip3P, and a light filter bearing arm41P of the lenses holder4P protrudes from an inner wall of the lenses holder4P, so as to extend toward the direction of the photosensitive path of the photosensitive chip3P; fourthly, the light filter5P is mounted on the light filter bearing arm41P of the lenses holder4P, so as to maintain the light filter5P in the photosensitive path of the photosensitive chip3P; fifthly, the lenses7P is arranged on the lenses bearing portion6P, and the lenses bearing portion6P is mounted on the lenses holder4P, so as to maintain the lenses7P in the photosensitive path of the photosensitive chip3P. In the camera module of the prior art, the light filter5P needs to be carried by the light filter bearing arm41P of the lenses holder4P. Therefore, the lenses holder4P must be designed to have a structure of the light filter bearing arm41P, and this causes the lenses holder4P to occupy more height space, so that it is difficult to reduce the size in height of the camera module. In addition, in order to prevent the light filter bearing arm41P of the lenses holder4P from contacting with the electronic component2P, a space needs to be reserved between the light filter bearing arm41P and the electronic component2P, this also makes it difficult to reduce the size in height of the camera module.

CONTENTS OF THE INVENTION

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein the size in height of the camera module may be reduced, so that the camera module is particularly suitable for being applied to electronic device pursuing thinner and lighter.

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein a light filter of the camera module does not need to be kept in a photosensitive path of a photosensitive chip by being supported by a lenses holder, so as to save height space occupied by the lenses holder, thereby reducing the size in height of the camera module

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein a back focus size of the camera module may be reduced to effectively reduce the size in height of the camera module, and particularly, in a preferred example of the camera module according to the present invention, the back focus size of the camera module may be reduced to 0.6 mm or less, thereby effectively reducing the size in height of the camera module.

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein a distance between a mounting surface of a lenses bearing portion of the camera module and a lower surface of the light filter may be reduced, so as to effectively reduce the size in height of the camera module, and particularly, in another preferred example of the camera module according to the present invention, the distance between the mounting surface of the lenses bearing portion and the lower surface of the light filter may be reduced to 0.2 mm or less, thereby effectively reducing the size in height of the camera module.

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein the camera module provides a bonding portion, and the bonding portion is used to combine the light filter and a circuit board assembly of the camera module, so that the light filter is kept in the photosensitive path of the photosensitive chip by the bonding portion, and in this way, the light filter does not need to be supported by the lenses holder.

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein a plane on which a top bonding surface of the bonding portion is located is higher than a plane on which a photosensitive area of the photosensitive chip is located, and a height difference between the two is controlled within a suitable range, and in this way, generation of stray light and imaging of dirty spots may be reduced, thereby improving the imaging quality of the camera module.

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein a width of the bonding portion is controlled within a suitable range, and in this way, packaging tolerances may be compensated, thereby ensuring the reliability of the camera module.

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein the top bonding surface of the bonding portion corresponds to a non-photosensitive area of the photosensitive chip, and in this way, flatness of the top bonding surface of the bonding portion may be ensured, thereby ensuring flatness between the light filter and the photosensitive area of the photosensitive chip.

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein the top bonding surface of the bonding portion corresponds to electronic components arranged at a same height, and in this way, the flatness of the top bonding surface of the bonding portion may be ensured, thereby ensuring the flatness between the light filter and the photosensitive area of the photosensitive chip.

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein the lower surface of the lenses holder is bonded to the circuit board, and the inner surface of the lenses holder is bonded to the bonding portion, and in this way, the reliability of the camera module may be improved.

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein the lenses holder has at least one notch, so that glue material for forming the bonding portion may be discharged from the notch of the lenses holder during the process of mounting the lenses holder on the circuit board assembly and heating the lenses holder, thereby avoiding excessive glue material overflow inward to contaminate the photosensitive area of the photosensitive chip.

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein air between the glue material and the inner surfaces of the lenses holder may be discharged from the notch during the process of mounting the lenses holder on the circuit board assembly and heating the lenses holder, thereby guiding the glue material to expand toward the direction of the inner surface of the lenses holder, so as to avoid excessive glue material overflow inward to contaminate the photosensitive area of the photosensitive chip.

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein the camera module is applied to an electronic device, thereby facilitating to increase a screen-to-body ratio of the electronic device.

An object of the present invention is to provide a photosensitive assembly, a camera module, a method for manufacturing the camera module, and an electronic device, wherein at least one side portion of the camera module forms a retracting portion, and in this way, the camera module may be closer to an edge of an electronic device body, thereby facilitating to increase the screen-to-body ratio of the electronic device.

According to one aspect of the present invention, the present invention provides a camera module including:

an optical lenses;

a light filter;

a circuit board assembly, wherein the circuit board assembly includes a circuit board and a photosensitive chip conductively connected to the circuit board; and

a bonding portion, wherein the bonding portion has a lower bonding side, a top bonding surface, and a light path, and the lower bonding side of the bonding portion is bonded to the circuit board assembly, and the bonding portion surrounds a photosensitive area of the photosensitive chip, so that the photosensitive area of the photosensitive chip is exposed to the light path of the bonding portion, and periphery of the light filter is bonded to the top bonding surface of the bonding portion, so that the light filter is kept in the photosensitive path of the photosensitive chip by the bonding portion, and the optical lenses is kept in the photosensitive path of the photosensitive chip.

According to an embodiment of the present invention, the lower bonding side of the bonding portion is bonded to a non-photosensitive area of the photosensitive chip, and the top bonding surface of the bonding portion corresponds to the non-photosensitive area of the photosensitive chip.

According to an embodiment of the present invention, the lower bonding side of the bonding portion is bonded to the circuit board and the non-photosensitive area of the photosensitive chip, and the top bonding surface of the bonding portion corresponding to the non-photosensitive area of the photosensitive chip.

According to an embodiment of the present invention, the circuit board assembly further includes a set of electronic components, wherein at least three of the electronic components are arranged at equal heights on and are conductively connected to the circuit board, and the bonding portion embeds the electronic components, and the top bonding surface of the bonding portion corresponds to the electronic components.

According to an embodiment of the present invention, a plane on which the top bonding surface of the bonding portion is located is lower than a plane on which a top surface of the tallest electronic component is located.

According to an embodiment of the present invention, a distance between the plane on which the top bonding surface of the bonding portion is located and the plane on which the photosensitive area of the photosensitive chip is located is greater than or equal to 0.15 mm.

According to an embodiment of the present invention, the bonding portion has four sides, and the adjacent sides are connected end to end and perpendicular to each other to form the light path between the four sides, and a width of at least one side of the bonding portion is greater than or equal to 0.15 mm.

According to an embodiment of the present invention, the camera module further includes a lenses holder, wherein the lenses holder has a lower surface, and the lower surface of the lenses holder is mounted on the circuit board.

According to an embodiment of the present invention, the camera module further includes a lenses holder, wherein the lenses holder has a lower surface, an upper surface corresponding to the lower surface, and an inner surface extending from the upper surface to the lower surface, wherein the lower surface of the lenses holder is mounted on the circuit board, and the inner surface of the lenses holder is bonded to the bonding portion.

According to an embodiment of the present invention, the camera module further includes a lenses holder, wherein the lenses holder has a lower surface, an upper surface corresponding to the lower surface, and an inner surface extending from the upper surface to the lower surface, wherein the lower surface of the lenses holder is bonded to the circuit board, and the inner surface of the lenses holder is bonded to the bonding portion.

According to an embodiment of the present invention, the camera module further includes a lenses holder, wherein the lenses holder has a lower surface, an upper surface corresponding to the lower surface, and an inner surface extending from the upper surface to the lower surface, wherein the lower surface of the lenses holder is bonded to the circuit board and the non-photosensitive area of the photosensitive chip, and the inner surface of the lenses holder is bonded to the bonding portion.

According to an embodiment of the present invention, the camera module has four side portions, wherein at least one of the side portions has a side surface, a bottom surface, and a connecting surface connected to the side surface and the bottom surface, and wherein a distance from a connection position of the connecting surface and the side surface to a central axis of the camera module is greater than a distance from a connection position of the connecting surface and the bottom surface to the central axis of the camera module.

According to an embodiment of the present invention, the connecting surface is an inclined plane; or the connecting surface is a convex arc surface; or the connecting surface is a step surface.

According to an embodiment of the present invention, the connecting surface is formed on the lenses holder and the circuit board.

According to an embodiment of the present invention, the lenses holder has at least one notch extending from the lower surface of the lenses holder to a direction of the upper surface, wherein a part of the bonding portion is accommodated in the notch of the lenses holder.

According to an embodiment of the present invention, the camera module further includes a lenses bearing portion having a mounting surface, wherein the lenses bearing portion is mounted on the lenses holder by attaching the mounting surface of the lenses bearing portion to the upper surface of the lenses holder, and the optical lenses is arranged on the lenses bearing portion.

According to an embodiment of the present invention, a range of value of a distance parameter D between the mounting surface of the lenses bearing portion and the lower surface of the light filter is: 0.1 mm≤D≤0.2 mm.

According to an embodiment of the present invention, a range of value of a back focal length parameter L of the camera module is: 0.4 mm≤L≤0.6 mm, wherein the back focal length of the camera module refers to a distance between a lower surface of a lens of the optical lenses close to the photosensitive chip and the photosensitive area of the photosensitive chip.

According to another aspect of the present invention, the present invention further provides an electronic device, which includes an electronic device body and at least one camera module arranged in the electronic device body, wherein the camera module includes:an optical lenses;a light filter;a circuit board assembly, wherein the circuit board assembly includes a circuit board and a photosensitive chip conductively connected to the circuit board; anda bonding portion, wherein the bonding portion has a lower bonding side, a top bonding surface, and a light path, wherein the lower bonding side of the bonding portion is bonded to the circuit board assembly, and the bonding portion surrounds a photosensitive area of the photosensitive chip, so that the photosensitive area of the photosensitive chip is exposed to the light path of the bonding portion, and periphery of the light filter is bonded to the top bonding surface of the bonding portion, so that the light filter is kept in the photosensitive path of the photosensitive chip by the bonding portion, and the optical lenses is kept in the photosensitive path of the photosensitive chip.

According to another aspect of the present invention, the present invention further provides a photosensitive assembly including:a light filter;a circuit board assembly, wherein the circuit board assembly includes a circuit board and a photosensitive chip conductively connected to the circuit board; anda bonding portion, wherein the bonding portion has a lower bonding side, a top bonding surface, and a light path, wherein the lower bonding side of the bonding portion is bonded to the circuit board assembly, and the bonding portion surrounds a photosensitive area of the photosensitive chip, so that the photosensitive area of the photosensitive chip is exposed to the light path of the bonding portion, and periphery of the light filter is bonded to the top bonding surface of the bonding portion, so that the light filter is kept in the photosensitive path of the photosensitive chip by the bonding portion.

According to an embodiment of the present invention, the lower bonding side of the bonding portion is bonded to the non-photosensitive area of the photosensitive chip, and the top bonding surface of the bonding portion corresponds to the non-photosensitive area of the photosensitive chip.

According to an embodiment of the present invention, the lower bonding side of the bonding portion is bonded to the circuit board and the non-photosensitive area of the photosensitive chip, and the top bonding surface of the bonding portion corresponds to the non-photosensitive area of the photosensitive chip.

According to an embodiment of the present invention, the circuit board assembly further includes a set of electronic components, wherein at least three of the electronic components are arranged at equal heights on and are conductively connected to the circuit board, and the bonding portion embeds the electronic components, and the top bonding surface of the bonding portion corresponds to the electronic components.

According to an embodiment of the present invention, a plane on which the top bonding surface of the bonding portion is located is lower than a plane on which a top surface of the tallest electronic component is located.

According to an embodiment of the present invention, a distance between the plane on which the top bonding surface of the bonding portion is located and the plane on which the photosensitive area of the photosensitive chip is located is greater than or equal to 0.15 mm.

According to an embodiment of the present invention, the bonding portion has four sides, and the adjacent sides are connected end to end and perpendicular to each other to form the light path between the four sides, and a width of at least one side of the bonding portion is greater than or equal to 0.15 mm.

According to one aspect of the present invention, the present invention provides a method for manufacturing a camera module, wherein the manufacturing method includes the following steps:(a) respectively bonding a lower bonding side of a bonding portion to a circuit board assembly and bonding a light filter to a top bonding surface of the bonding portion, so as to keep the light filter in a photosensitive path of a photosensitive chip of the circuit board assembly; and(b) keeping an optical lenses in the photosensitive path of the photosensitive chip to manufacture the camera module.

According to an embodiment of the present invention, the step (a) further includes the following steps:(a.1) applying glue material to the circuit board assembly around a photosensitive area of the photosensitive chip;(a.2) mounting the light filter on the top of the glue material; and(a.3) curing the glue material to form the bonding portion, wherein a side portion of the glue material bonded to the circuit board assembly forms the lower bonding side of the bonding portion, and a side portion of the glue material bonded to the light filter forms the top bonding surface of the bonding portion.

According to an embodiment of the present invention, in the step (a.2), pressure is applied to the light filter in a direction towards the photosensitive chip, so as to mount the light filter on the top of the glue material.

According to an embodiment of the present invention, before the step (a.3), the step (a) further includes the step of: mounting a lenses holder on a circuit board of the circuit board assembly, so that in the step (a.3), the lower surface of the lenses holder is bonded to the circuit board, and the inner surface of the lenses holder is bonded to the bonding portion.

According to an embodiment of the present invention, in the step (a.3), the glue material is configured to overflow from a notch of the lenses holder.

According to an embodiment of the present invention, in the step (a.3), the glue material is guided to expand toward a direction of the inner surface of the lenses holder.

According to an embodiment of the present invention, in the above method, air held between the glue material and the inner surface of the lenses holder is allowed to escape from a notch of the lenses holder, thereby guiding the glue material to expand toward the direction of the inner surface of the lenses holder.

According to an embodiment of the present invention, in the step (a.1), a glue material is applied to a non-photosensitive area of the photosensitive chip, so that in the step (a.3), the top bonding surface of the bonding portion corresponds to the non-photosensitive area of the photosensitive chip.

According to an embodiment of the present invention, in the step (a.1), a glue material is configured to cover at least three electronic components which are arranged at the same height and conductively connected to a circuit board of the circuit board assembly; so that in the step (a.3), the top bonding surface of the bonding portion corresponds to the electronic components.

According to an embodiment of the present invention, in the step (a.1), a glue material is configured to cover at least three electronic components which are arranged at the same height and conductively connected to a circuit board; so that in the step (a.3), the top bonding surface of the bonding portion corresponds to the electronic components.

According to an embodiment of the present invention, in the step (a.1), a glue material is applied to the circuit board assembly along an extension direction of a set of electronic components of the circuit board, and before the step (a.2) and the step (a.3), a gap formed between the light filter and the circuit board assembly is sealed.

According to an embodiment of the present invention, the step (a) further includes the following steps:(a.1′) forming a ring-shaped boss on peripheral edges of the light filter;(a.2′) mounting the ring-shaped boss on the non-photosensitive area of the photosensitive chip; and(a.3′) curing the ring-shaped boss to form the bonding portion, wherein a side portion of the ring-shaped boss bonded to the non-photosensitive area of the photosensitive chip forms the lower bonding side of the bonding portion, and a side portion of the ring-shaped boss bonded to the light filter forms the top bonding surface of the bonding portion.

According to an embodiment of the present invention, a distance between a plane on which the top bonding surface of the bonding portion is located and a plane on which the photosensitive area of the photosensitive chip is located is greater than or equal to 0.15 mm.

According to an embodiment of the present invention, the bonding portion has four sides, and the adjacent sides are connected end to end and perpendicular to each other to form the light path between the four sides, wherein a width of at least one of the side edges of the bonding portion is greater than or equal to 0.15 mm.

According to an embodiment of the present invention, in the step (a.2′), the ring-shaped boss is mounted on the non-photosensitive area of the photosensitive chip by glue.

According to an embodiment of the present invention, the step (a) further includes the following steps:(a.1″) forming a ring-shaped boss on the non-photosensitive area of the photosensitive chip;(a.2″) mounting peripheral edges of the light filter on the ring-shaped boss; and(a.3″) curing the ring-shaped boss to form the bonding portion, wherein a side portion of the ring-shaped boss bonded to the non-photosensitive area of the photosensitive chip forms the lower bonding side of the bonding portion, and a side portion of the ring-shaped boss bonded to the light filter forms the top bonding surface of the bonding portion.

According to an embodiment of the present invention, in the step (a.2″), the light filter is mounted on the ring-shaped boss by glue.

According to an embodiment of the present invention, after the step (a), the manufacturing method further includes the step of: mounting a lenses holder on a circuit board of the circuit board assembly, so that in the step (c), the optical lenses is kept in the photosensitive path of the photosensitive chip by the lenses holder.

According to an embodiment of the present invention, after the step (a), the manufacturing method further includes the step of: forming a lenses holder on a circuit board of the circuit board assembly, so that in the step (c), the optical lenses is kept in the photosensitive path of the photosensitive chip by the lenses holder.

According to an embodiment of the present invention, after the step (c), the manufacturing method further includes the step of: removing a part of at least one side portion of the camera module, so that the side portion forms a side surface, a bottom surface, and a connecting surface connected to the side surface and the bottom surface, wherein a distance from a connection position of the connecting surface and the side surface to a central axis of the camera module is greater than a distance from a connection position of the connecting surface and the bottom surface to the central axis of the camera module.

According to an embodiment of the present invention, in the above method, the side portion of the camera module is cut, so that the side portion forms the side surface, the bottom surface, and the connecting surface connected to the side surface and the bottom surface.

According to an embodiment of the present invention, in the above method, the side portion of the camera module is ground, so that the side portion forms the side surface, the bottom surface, and the connecting surface connected to the side surface and the bottom surface.

SPECIFIC EMBODIMENTS

The following description is used to disclose the present invention so that those skilled in the art may implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art may think of other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

Those skilled in the art should understand that in the disclosure of the present invention, the orientation or positional relationship indicated by the terms “longitudinal”, “lateral”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, etc. are based on an orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the above-mentioned terms should not be construed as limiting the present invention.

It may be understood that the term “a/an” should be understood as “at least one” or “one or more”, i.e., in one embodiment, the number of an element may be one, and in another embodiment, the number of the element may be more than one, and the term “one” cannot be understood as a restriction on the number.

Referring toFIGS.2-8of the accompanying drawings of the specification of the present invention, a camera module1000according to the first preferred embodiment of the present invention is disclosed and explained in the following description, wherein the camera module1000includes a circuit board assembly10, a bonding portion20, a light filter30, and an optical lenses40.

Referring toFIGS.7-8, the circuit board assembly10includes a circuit board11and a set of electronic components12conductively connected to the circuit board11, and there is a gap between the adjacent electronic components12. The manner of conductively connecting the electronic component12to the circuit board11is not limited. For example, in the specific example of the camera module1000shown inFIGS.7-8, the electronic component12is conductively connected to the circuit board11by being mounted on the surface of the circuit board11. Optionally, the electronic component12is conductively connected to the circuit board11in such a manner that at least a part of it is embedded inside of the circuit board11.

Further referring toFIGS.7-8, the circuit board assembly10further includes a photosensitive chip13, which has a photosensitive area131and a non-sensitive area132surrounding the photosensitive area131, wherein the photosensitive chip13is conductively connected to the circuit board11. The manner of conductively connecting the photosensitive chip13to the circuit board11is not limited. For example, in the specific example of the camera module1000shown inFIGS.7-8, the photosensitive chip13is mounted on the surface of the circuit board11, and two ends of at least one set of guiding wires14formed by a wire bonding process are conductively connected to the photosensitive chip13and the circuit board11, respectively, so that the photosensitive chip13is conductively connected to the circuit board11. Optionally, the photosensitive chip13is mounted on the circuit board11and conductively connected to the circuit board11by a flip-chip process.

Particularly, in the camera module1000shown inFIGS.7-8, a set of the electronic components12form two rows of the electronic components12, wherein one row of the electronic components12are located on the left side of the photosensitive chip13, another row of the electronic components12are located on the right side of the photosensitive chip13. Optionally, a set of the electronic components12form three rows of the electronic components12, wherein the three rows of the electronic components12are respectively located on three sides of the photosensitive chip13. Optionally, a set of the electronic components12form four rows of the electronic components12, wherein the four rows of the electronic components12are located on four sides of the photosensitive chip13. Optionally, more than two rows of the electronic components12may also be arranged on a same side of the photosensitive chip13. Therefore, the relative arrangement of the electronic components12and the photosensitive chip13shown inFIGS.2-7are only for reference, and should not be regarded as a limitation to the content and scope of the camera module1000of the present invention.

The bonding portion20is ring-shaped and has a lower bonding side21, a top bonding surface22corresponding to the lower bonding side21, and a light path23extending from the top bonding surface22to the lower bonding side21. The lower bonding side21of the bonding portion20is bonded to the circuit board assembly10, and the bonding portion20surrounds the photosensitive area131of the photosensitive chip13; a plane on which the top bonding surface22of the bonding portion20is located is higher than a plane on which the photosensitive area131of the photosensitive chip13is located, and the photosensitive area131of the photosensitive chip13corresponds to the light path23of the bonding portion20. Periphery of the light filter30is bonded to the top bonding surface22of the bonding portion20, so that the light filter30is kept in the photosensitive path of the photosensitive chip13. The optical lenses40is kept in the photosensitive path of the photosensitive chip13. In this preferred example of the camera module1000of the present invention shown inFIGS.7-8, the bonding portion20is in a shape of a square ring, i.e., the bonding portion20has four sides24, wherein two adjacent sides24are connected end to end and perpendicular to each other, so that the light path23is formed between the bonding portions20formed by the four sides24. Each side24of the bonding portion20is respectively located outside the photosensitive area131of the photosensitive chip13.

Preferably, the lower bonding side21of the bonding portion20is bonded to the non-photosensitive area132of the photosensitive chip13, and the bonding portion20extends upward from the non-photosensitive area132of the photosensitive chip13to a suitable height, and forms the top bonding surface22of the bonding portion20; and the top bonding surface22of the bonding portion20corresponds to the non-photosensitive area132of the photosensitive chip13; in this way, a flatness of the top bonding surface22of the bonding portion20may be ensured by the non-photosensitive area132of the photosensitive chip13, thereby ensuring the flatness between the light filter30and the photosensitive area131of the photosensitive chip13.

A distance size (parameter H) between the plane on which the top bonding surface22of the bonding portion20is located and the plane on which the photosensitive area131of the photosensitive chip13is located is greater than or equal to 0.15 mm. In this way, it is beneficial for reducing generation of stray light and imaging of dirty spots, thereby improving the imaging quality of the camera module1000.

A width size (parameter W) of the side24of the bonding portion20is greater than or equal to 0.15 mm. In this way, packaging tolerances may be compensated, so that the light filter30is reliably supported in the photosensitive path of the photosensitive chip13by the bonding portion20.

In the present invention, the circuit board assembly10, the bonding portion20, and the light filter30form a photosensitive assembly, i.e., the camera module1000includes the photosensitive assembly and the optical lenses40which is kept in the photosensitive path of the photosensitive chip13, and the light entering the inside of the camera module1000from the optical lenses40may be received by the photosensitive chip13and photo-electrically converted.

Further to refer toFIGS.7-8, the camera module1000further includes a lenses holder50and a lenses bearing portion60mounted on the lenses holder50. The lenses holder50has a lower surface51, an upper surface52corresponding to the lower surface51, and an inner surface53extending from the upper surface52to the lower surface51. The lower surface51of the lenses holder50is integrally bonded to the circuit board11and the non-photosensitive area132of the photosensitive chip13, and the inner surface53of the lenses holder50is integrally bonded to the bonding portion20. The optical lenses40is arranged on the lenses bearing portion60, and the lenses bearing portion60has a mounting surface61, wherein the lenses bearing portion60is mounted on the lenses holder50in such a manner that the mounting surface61of the lenses bearing portion60is mounted on the upper surface52of the lenses holder50, so that the optical lenses40is kept in the photosensitive path of the photosensitive chip13by the lenses holder50and the lenses bearing portion60.

The type of the lenses bearing portion60is selected according to the type of the camera module1000. For example, when the camera module1000is a fixed-focus camera module, the lenses bearing portion60is selected as a lenses barrel. Correspondingly, when the camera module1000is a zoom camera module, the lenses bearing portion60is selected as a motor, such as but not limited to a voice coil motor.

Referring toFIG.7, preferably, a parameter of a distance between the mounting surface61of the lenses bearing portion60and the lower surface of the light filter30is set as D, and a range of value of the parameter D is 0.1-0.2 mm (including 0.1 mm and 0.2 mm) to help reduce the size in height of the camera module1000. It is worth mentioning that, in the camera module1000of the present invention, the light filter30is kept in the photosensitive path of the photosensitive chip13by the bonding portion20, and the lenses bearing portion60is mounted on the lenses holder50, so that compared to the camera module in prior art, in this preferred example of the camera module1000of the present invention, the distance between the mounting surface61of the lenses bearing portion60and the lower surfaces of the light filter30may be smaller, which is particularly important for reducing the size in height of the camera module1000.

Further referring toFIG.7, in this preferred example of the camera module1000according to the present invention, the light filter30is kept in the photosensitive path of the photosensitive chip13by the bonding portion20, and the lenses bearing portion60is mounted on the lenses holder50so that the optical lenses40is kept in the photosensitive path of the photosensitive chip13by the lenses bearing portion60and the lenses holder50. Since the lenses holder50does not need to keep the light filter30in the photosensitive path of the photosensitive chip13, a height of the upper surface52of the lenses holder50(the distance from the upper surface52to the photosensitive chip13) may be reduced, thereby reducing a distance between the optical lenses40and the photosensitive area131of the photosensitive chip13. In this way, a back focus size of the camera module1000may be reduced, thereby facilitating to reduce the size in height of the camera module1000. The back focal length of the camera module1000refers to a distance between a surface of a lens of the optical lenses40which is closest to the photosensitive chip13and the photosensitive area131of the photosensitive chip13. A parameter of the back focal length of the camera module1000is set as L, wherein a range of value of the parameter L is 0.4-0.6 mm (including 0.4 mm and 0.6 mm), as compared with the back focal length of 0.8 mm in the camera module of prior art, the back focal length of the camera module1000according to the present invention may be reduced by a large value, thereby facilitating to reduce the size in height of the camera module1000.

Optionally, in an example of the camera module1000, the lenses bearing portion60and the lenses holder50may be an integrated structure. In another example of the camera module1000, the camera module1000may not be configured with the lenses bearing portion60. In this case, the camera module1000keeps the optical lenses40in the photosensitive path of the photosensitive chip13by directly mounting the optical lenses40on the lenses holder50.

In the camera module1000shown inFIGS.7-8, the lenses holder50is not prefabricated, wherein the lenses holder50may be integrally formed by a molding process and bonded to the circuit board assembly10and the bonding portion20, thereby allowing the lower surface51of the lenses holder50to be integrally bonded to the circuit board11and the non-photosensitive area132of the photosensitive chip13, and allowing the inner surface53of the lenses holder50to be integrally bonded to the bonding portion20. In this way, the reliability for bonding the lenses holder50to the circuit board11, the photosensitive chip13, and the bonding portion20is higher, thereby facilitating to ensure the stability and reliability of the camera module1000. Optionally, the lenses holder50may be further integrally bonded to the peripheral edges of the light filter30.

The camera module1000adopts a manner in which the lenses holder50is integrally bonded to the circuit board11and the non-photosensitive area132of the photosensitive chip13, so that the packaging process of the camera module1000no longer requires the lenses holder50to be prefabricated, thereby facilitating to reduce the cost and risk of the management and control of the components of the camera module1000.

The camera module1000adopts a manner in which the lenses holder50is integrally bonded to the circuit board11and the non-photosensitive area132of the photosensitive chip13; this is not only beneficial to ensure the reliability of the bonding relationship of the circuit board11and the photosensitive chip13, and the flatness of the photosensitive chip13is no longer limited by the flatness of the circuit board11; wherein the flatness of the photosensitive chip13is ensured by the lenses holder50, thereby facilitating to ensure the flatness of the photosensitive chip13. Particularly, in such a manner that the lenses holder50is integrally bonded to the circuit board11and the non-photosensitive area132of the photosensitive chip13through a molding die, the top surface of the lenses holder50may be made flatter and is not affected by the inclination or deformation of the circuit board11, so as to reduce cumulative tolerances during the subsequent assembly; in this way, it is beneficial to ensure the coaxiality of the optical lenses40and the photosensitive chip13.

The camera module1000adopts a manner in which the lenses holder50is integrally bonded to the circuit board11and the non-photosensitive area132of the photosensitive chip13, so that the lenses holder50ensures the flatness of the photosensitive chip13; in this way, a thinner size may be selected for the circuit board11, thereby facilitating to reduce the size in height of the camera module1000. Particularly, in such a manner that the lenses holder50is integrally bonded to the circuit board11through a molding process, the lenses holder50may reinforce the circuit board11, so that the circuit board11may be thinner under the premise of ensuring the flatness of the circuit board11, and this is beneficial to reduce the overall size in height of the camera module1000.

The camera module1000adopts the manner in which the lenses holder50is integrally bonded to the circuit board11and the non-photosensitive area132of the photosensitive chip13, and this may avoid using glue to mount the lenses holder50on the circuit board11, thereby facilitating to reduce the height size of the camera module1000.

Referring toFIG.7, the camera module1000adopts a manner in which the light filter30is kept in the photosensitive path of the photosensitive chip13by the bonding portion20. On one hand, the cost of the camera module1000may be reduced by reducing the size of the light filter30; on the other hand, the lower surface of the light filter30(the surface of the light filter30facing the photosensitive chip13) may be lower than the height of the top surface of the highest electronic component12. In this way, in conjunction with the improvement in the optical design of the camera module1000, and after reducing the back focus of the camera module1000, the light filter30of the camera module1000may be closer to the photosensitive chip13, so that the optical lenses40has the possibility of being adjusted toward the direction of the photosensitive chip13, thereby facilitating to reduce the height size of the camera module1000.

FIGS.2-7show the packaging process of the camera module1000.

Referring toFIG.2, a set of the electronic components12are mounted on the circuit board11. The type of the electronic component12is not limited in the camera module1000of the present invention. For example, the electronic component12may be, but not limited to, a resistor, a capacitor, a controller, and the like.

Referring toFIG.3, the photosensitive chip13is mounted on the circuit board11, and at least one set of guiding wires14with the two ends being conductively connected to the photosensitive chip13and the circuit board11respectively are formed by a wire bonding process, so as to form the circuit board assembly10.

It is worth mentioning that, the stage shown inFIG.3may be prior to the stage shown inFIG.2, i.e., firstly the photosensitive chip13is mounted on the circuit board11, and then a set of the electronic components12are mounted on the circuit board11to form the circuit board assembly10.

Referring toFIG.4, a ring-shaped boss200is formed around one side portion of the light filter30, so as to form a light filter300with a ring-shaped boss. For example, in the preferred example of the camera module1000shown inFIGS.7-8, the ring-shaped boss200may be formed around one side portion of the light filter30through a screen printing process, so as to form the light filter300with the ring-shaped boss. Optionally, the ring-shaped boss200may also be formed around one side portion of the light filter30through a photolithography process, so as to form the light filter300with the ring-shaped boss. The material for forming the ring-shaped boss200may be, but is not limited to, colloid.

It is worth mentioning that, the sequence of forming the circuit board assembly10and forming the light filter300with the ring-shaped boss is not limited.

Referring toFIG.5, firstly, the light filter300with the ring-shaped boss is mounted on the circuit board assembly10, wherein the ring-shaped boss200is mounted on the non-photosensitive area132of the photosensitive chip13; for example, in an example, if the material of the ring-shaped boss200is a colloidal material, the ring-shaped boss200may be directly mounted on the non-photosensitive area132of the photosensitive chip13; in another example, if the material of the ring-shaped boss200is non-colloid, it is necessary to mount the ring-shaped boss200on the non-photosensitive area132of the photosensitive chip13by glue or a similar substance; secondly, the ring-shaped boss200is cured, so that the ring-shaped boss200forms the bonding portion20, and the light filter30is kept in the photosensitive path of the photosensitive chip13by the bonding portion20, wherein the surface of the ring-shaped boss200bonded to the photosensitive chip13forms the lower bonding side21of the bonding portion20, and the surface of the ring-shaped boss200bonded to the light filter30forms the top bonding surface22of the bonding portion20, and a hollow portion in the middle of the ring-shaped boss200forms the light path23of the bonding portion20.

It is worth mentioning that, the way of curing the ring-shaped boss200is not limited, and it is selected according to the material for forming the ring-shaped boss200. For example, the ring-shaped boss200may be cured by heating or irradiation with ultraviolet light, so as to form the bonding portion20.

Referring toFIG.6, the lenses holder50is formed on the circuit board assembly10and the bonding portion20through a molding process, so that the lower surface51of the lenses holder50is integrally bonded to the circuit board11and the photosensitive chip13of the circuit board assembly10, and the inner surface53of the lenses holder50is integrally bonded to the bonding portion20. Preferably, the lenses holder50embeds the electronic components12and the guiding wires14protruding from the circuit board11; in this way, firstly, there is no need to reserve a safe space between the lenses holder50and the electronic components12, thereby facilitating to reduce the height size of the camera module1000; secondly, the lenses holder50prevents the electronic components12from being exposed, thereby preventing the pollutants such as debris falling off the surface of the electronic components12from contaminating other electronic components12or contaminating the photosensitive chip13; thirdly, the upper surface52of the lenses holder50has a higher flatness, so that after the optical lenses40is kept in the photosensitive path of the photosensitive chip13by mounting the lenses bearing portion60on the upper surface52of the lenses holder50, the central axis of the optical lenses40and the central axis of the photosensitive area131of the photosensitive chip13may be overlapped, so as to ensure the imaging quality of the camera module1000; fourthly, the lenses holder50may be filled in the space between the adjacent electronic components12, so as to isolate the adjacent electronic components12and prevent the adjacent electronic components12from interfering with each other. In this way, a distance between the adjacent electronic components12may be smaller, so that the camera module1000may be equipped with a larger number and larger size of the electronic components12.

Referring toFIGS.7-8, the optical lenses40is mounted on the lenses bearing portion60, and the lenses bearing portion60is mounted on the upper surface52of the lenses holder50, so as to keep the optical lenses40in the photosensitive path of the photosensitive chip13, thereby manufacturing the camera module1000.

Optionally, in another manufacturing process of the camera module1000, firstly, the ring-shaped boss200is formed in the non-photosensitive area132of the photosensitive chip13by a screen printing process or a photolithography process; secondly, the light filter30is mounted on the ring-shaped boss200, for example, glue or similar substance may be used to mount the light filter30on the ring-shaped boss200; then, the ring-shaped boss200is cured, so that the ring-shaped boss200forms the bonding portion20, and the light filter30is kept in the photosensitive path of the photosensitive chip13by the bonding portion20, wherein a surface for bonding the ring-shaped boss200to the photosensitive chip13forms the lower bonding side21of the bonding portion20, a surface for bonding the ring-shaped boss200to the light filter30forms the top bonding surface22of the bonding portion20, and the hollow portion in the middle of the ring-shaped boss200forms the light path23of the bonding portion20.

FIG.9shows an application state of the camera module1000, wherein the camera module1000is arranged in an electronic device body2000, so that the electronic device body2000and the camera module1000form an electronic device. It is worth mentioning that, the example in which the electronic device is a smart phone shown inFIG.9is only an example, which does not limit the application scope of the camera module1000according to the present invention. For example, the types of the electronic device may be, but are not limited to, a tablet computer, a notebook computer, a personal digital assistant, and a MP3/4/5.

FIG.10shows a modified implementation of the camera module1000, andFIG.11Ashows an application state of the camera module1000. The difference from the camera module1000shown inFIGS.7-8is that: in this specific example of the camera module1000shown inFIG.10, the camera module1000has four side portions101, wherein at least one side portion101of the camera module1000further has a side surface1011, a bottom surface1012, and a connecting surface1013connected to the side surface1011and the bottom surface1012, and wherein a distance L1from a connection position of the side surface1011and the connecting surface1013to a central axis of the camera module1000is greater than a distance L2from a connection position of the bottom surface1012and the connecting surface1013to the central axis of the camera module1000, so that at least one side portion101of the camera module1000has a retracting portion, so as to match a turning part of a housing of the electronic device body; in this way, the optical lenses40of the camera module1000may be closer to the edge of the housing2001of the electronic device body2000, thereby facilitating to increase the screen-to-body ratio of the electronic device. Particularly, comparing to the relationship between the camera module and the housing of the electronic device in the prior art shown inFIG.11B, it can be seen that the distance between the camera module1000of the present invention and the edge of the housing2001of the electronic device body2000is smaller, thereby facilitating to increase the screen-to-body ratio of the electronic device.

FIG.12Ashows a relationship between the camera module1000and the housing2001of the electronic device body2000after the camera module1000is arranged in the electronic device body to form the electronic device, wherein a side portion101with a locking portion of the camera module1000corresponds to the turning part of the housing2001of the electronic device body2000, so that the optical lenses40of the camera module1000may be closer to the edge of the housing2001of the electronic device body2000, so as to increase the screen-to-body ratio of the electronic device. The connecting surface1013of the camera module1000is an inclined plane, referring toFIG.12A; or the connecting surface1013of the camera module1000is a convex curved surface, referring toFIG.12B; wherein the connecting surface1013of the camera module1000may be formed by removing a part of the circuit board11and/or a part of the lenses holder50. For example, a part of the circuit board11and a part of the lenses holder50may be removed by cutting or grinding the circuit board11and/or the lenses holder50. Optionally, the connecting surface1013of the camera module1000is a step surface, referring toFIG.12C; wherein the connecting surface1013of the camera module1000may be formed by retracting the circuit board11in the process of packaging the camera module1000. Optionally, the connecting surface1013of the camera module1000may also be formed by removing a part of the circuit board11or removing a part of the circuit board11and the lenses holder50after the camera module1000is packaged

FIG.13shows another modified implementation of the camera module1000. The difference from the camera module1000shown inFIGS.2to8is that: in this preferred example of the camera module shown inFIG.13, the camera module1000does not have the lenses bearing portion60, wherein the lenses holder50is mounted on the circuit board11of the circuit board assembly10, and the optical lenses40is mounted on the lenses holder50, so that the optical lenses40is kept in the photosensitive path of the photosensitive chip13by the lenses holder50.

Referring toFIGS.14-20of the accompanying drawings of the specification according to the present invention, a camera module1000according to the second preferred embodiment of the present invention is disclosed and explained in the following description, wherein the camera module1000includes a circuit board assembly10, a bonding portion20, a light filter30, and an optical lenses40.

Referring toFIGS.19-20, the circuit board assembly10includes a circuit board11and a set of electronic components12conductively connected to the circuit board11, and there is a gap between the adjacent electronic components12. The manner in which the electronic component12is conductively connected to the circuit board11is not limited; for example, in the specific example of the camera module1000shown inFIGS.19-20, the electronic component12is conductively connected to the circuit board11by being mounted on the surface of the circuit board11. Optionally, the electronic component12is conductively connected to the circuit board11in such a manner that at least a part of it is embedded inside the circuit board11.

Further referring toFIGS.19-20, the circuit board assembly10further includes a photosensitive chip13which has a photosensitive area131and a non-sensitive area132surrounding the photosensitive area131, wherein the photosensitive chip13is conductively connected to the circuit board11. In addition, a height difference between the photosensitive area131and the non-photosensitive area132of the photosensitive chip13is not limited to a height difference shown inFIGS.15-19. The way of conductively connecting the photosensitive chip13to the circuit board11is not limited; for example, in the specific example of the camera module1000shown inFIGS.19-20, the photosensitive chip13is mounted on the surface of the circuit board11, and two ends of at least one set of guiding wires14formed by a wire bonding process are conductively connected to the photosensitive chip13and the circuit board11respectively, so that the photosensitive chip13is conductively connected to the circuit board11. Optionally, the photosensitive chip13is mounted on the circuit board11by a flip-chip process and conductively connected to the circuit board11.

Particularly, in the camera module1000shown inFIGS.19-20, a set of the electronic components12form two rows of the electronic components12, wherein one row of the electronic components12are located on the left side of the photosensitive chip13, and the other row of the electronic component12sare located on the right side of the photosensitive chip13. Optionally, a set of the electronic components12form three rows of the electronic components12, wherein the three rows of the electronic components12are respectively located on three sides of the photosensitive chip13. Optionally, a set of the electronic components12form four rows of the electronic components12, wherein the four rows of the electronic components12are respectively located on four sides of the photosensitive chip13. Optionally, more than two rows of the electronic components12may also be arranged on the same side of the photosensitive chip13. Therefore, the relative arrangement of the electronic components12and the photosensitive chip13shown inFIGS.2-7are only for reference, and should not be regarded as a limitation to the content and scope of the camera module1000of the present invention.

The bonding portion20is ring shaped and has a lower bonding side21, a top bonding surface22corresponding to the lower bonding side21, and a light path23. The lower bonding side21of the bonding portion20is bonded to the circuit board assembly10, and the bonding portion20surrounds the photosensitive area131of the photosensitive chip13, so that the photosensitive area131of the photosensitive chip13is exposed to the light path23of the bonding portion20; and a plane on which the top bonding surface22of the bonding portion20is located is higher than a plane on which the photosensitive area131of the photosensitive chip13is located. Periphery of the light filter30is bonded to the top bonding surface22of the bonding portion20, so that the light filter30is kept in the photosensitive path of the photosensitive chip13. The optical lenses40are kept in the photosensitive path of the photosensitive chip13. In the camera module1000of the present invention, the bonding portion20is in a shape of a square ring, i.e., the bonding portion20has four sides24, wherein two adjacent sides24are connected end to end and perpendicular to each other, so that the photosensitive path24is formed between the bonding portions20formed by the four sides24. Each side24of the bonding portion20is respectively located outside the photosensitive area131of the photosensitive chip13.

Preferably, referring toFIG.19, the lower bonding side21of the bonding portion20is bonded to the circuit board11of the circuit board assembly10, the electronic component12, the guiding wire14and the non-photosensitive area132of the photosensitive chip13; the bonding portion20extends upward from the circuit board assembly10to a suitable height, and forms the top bonding surface22of the bonding portion20; and the top bonding surface22of the bonding portion20corresponds to the electronic components12arranged at a same height; in this way, a flatness of the top bonding surface22of the bonding portion20may be ensured by the electronic components12arranged at the same height, thereby ensuring a flatness between the light filter30and the photosensitive area131of the photosensitive chip13.

Optionally, referring toFIG.21, the top bonding surface22of the bonding portion20may also correspond to the non-photosensitive area132of the photosensitive chip13; in this way, the flatness of the top bonding surface22of the bonding portion20may be ensured by the non-photosensitive area132of the photosensitive chip13, thereby ensuring the flatness between the light filter30and the photosensitive area131of the photosensitive chip13. Further referring toFIG.21, a height of the top bonding surface22of the bonding portion20may be lower than the highest position of the bonding portion20, for example, the height of the top bonding surface22of the bonding portion20may be lower than the height of the electronic component12; in this way, in conjunction with the improvement in the optical design of the camera module1000, the back focus of the camera module1000may be reduced, thereby further reducing the height size of the camera module1000. In addition, the manner in which the light filter30of the camera module1000according to the present invention is further closer to the photosensitive chip13allows the optical lenses40to have the possibility of being adjusted toward the direction of the photosensitive chip13, thereby facilitating to reduce the height size of the camera module1000.

Further referring toFIG.19, in the camera module1000according to the present invention, the types of the electronic components12may be, but are not limited to, a resistor, a capacitor, a controller or the like. Generally, different types of electronic components12have different height sizes. Therefore, in order to ensure that at least three of the electronic components12may be arranged at the same height, when these electronic components12are conductively connected to the circuit board11, the electronic components12with larger height size may be half embedded in the circuit board11, and the electronic components12with smaller height size are mounted on the surface of the circuit board11, so that these electronic components12are arranged at the same height; alternatively, when these electronic components12are conductively connected to the circuit board11, the electronic components12with larger height size may be mounted on the surface of the circuit board11, and the height of the electronic components12with smaller height size may be adjusted through an additional structure, so that these electronic components12are arranged at the same height.

It is worth mentioning that, when the height of the electronic component12with a smaller height size is adjusted by the additional structure, the additional structure may be arranged between the electronic component12and the circuit board11, or may also be arranged on the top of the electronic component12.

A distance size (parameter H) between the plane on which the top bonding surface22of the bonding portion20is located and the plane on which the photosensitive area131of the photosensitive chip13is located is greater than or equal to 0.15 mm. In this way, it is beneficial for reducing the generation of stray light and the imaging of dirty spots, thereby improving the imaging quality of the camera module1000.

In the present invention, the circuit board assembly10, the bonding portion20, and the light filter30form a photosensitive assembly, i.e., the camera module1000includes the photosensitive assembly and the optical lenses40which is kept in the photosensitive path of the photosensitive chip13of the photosensitive assembly, wherein the light entering the inside of the camera module1000from the optical lenses40may be received by the photosensitive chip13and photo-electrically converted.

Further referring toFIGS.19-20, the camera module1000further includes a lenses holder50and a lenses bearing portion60mounted on the lenses holder50. The lenses holder50has a lower surface51, an upper surface52corresponding to the lower surface51, and an inner surface53extending from the upper surface52to the lower surface51. The lower surface51of the lenses holder50is mounted on the circuit board11, and the inner surface53of the lenses holder50is bonded to the bonding portion20. The optical lenses40is arranged on the lenses bearing portion60, and the lenses bearing portion60is mounted on the upper surface52of the lenses holder50, so that the optical lenses40is kept in the photosensitive path of the photosensitive chip13by the lenses holder50and the lenses bearing portion60.

The type of the lenses bearing portion60is selected according to the type of the camera module1000. For example, when the camera module1000is a fixed-focus camera module, the lenses bearing portion60is selected as a lenses barrel. Correspondingly, when the camera module1000is a zoom camera module, the lenses bearing portion60is selected as a motor, such as but not limited to a voice coil motor.

Optionally, in an example of the camera module1000, the lenses bearing portion60and the lenses holder50may be an integrated structure. In another example of the camera module1000, the camera module1000may not be configured with the lenses bearing portion60, in this case, the camera module1000keeps the optical lenses40in the photosensitive path of the photosensitive chip13by directly mounting the optical lenses40on the lenses holder50.

FIGS.14-19show the packaging process of the camera module1000.

Referring toFIG.14, a set of the electronic components12are mounted on the circuit board11. The type of the electronic component12is not limited in the camera module1000according to the present invention. For example, the electronic component12may be, but not limited to, a resistor, a capacitor, a controller, or the like.

Referring toFIG.15, the photosensitive chip13is mounted on the circuit board11, and at least one set of guiding wires14with the two ends being conductively connected to the photosensitive chip13and the circuit board11respectively are formed by a wire bonding process, so as to form the circuit board assembly10.

It is worth mentioning that, the stage shown inFIG.15may be prior to the stage shown inFIG.14, i.e., firstly the photosensitive chip13is mounted on the circuit board11, and then a set of the electronic components12are mounted on the circuit board11to form the circuit board assembly10.

Referring toFIG.16, a glue material400is applied to the circuit board assembly10so that the glue material400covers the electronic components12. Preferably, the glue material400applied to the circuit board assembly10further extends inward to and wraps the non-photosensitive area132of the photosensitive chip13, and extends outward to and wraps the circuit board11; and the glue material400covers the guiding wires14. More preferably, the glue material400applied to the circuit board assembly10has a ring shape, such as a square ring shape, which surrounds the photosensitive area131of the photosensitive chip13. In this preferred example of the camera module1000shown inFIGS.19-20, the glue material400applied to the circuit board assembly10covers the highest electronic component12.

It is worth mentioning that the glue material400applied to the circuit board assembly10is the glue material400with a relatively high viscosity, so as to avoid an undesirable phenomenon, i.e. prevent the glue material400from flowing after being applied to the circuit board assembly10, thereby avoiding contamination of the photosensitive area131of the photosensitive chip13during the process of packaging the camera module1000.

Referring toFIG.17, the light filter30is mounted on the top of the glue material400applied to the circuit board assembly10, so that the light filter30is kept in the photosensitive path of the photosensitive chip13by the glue material400. When the light filter30is mounted on the top of the glue material400applied to the circuit board assembly10, a force is applied to the light filter30in a direction where the photosensitive chip13is located, so that a flat surface is formed on the top of the glue material400applied to the circuit board assembly10, and the light filter30and the photosensitive area131of the photosensitive chip13are kept flat. Since the glue material400applied to the circuit board assembly10is the glue material400with a relatively high viscosity, after the light filter30is mounted on the top of the glue material400applied to the circuit board assembly10and the external force applied to the light filter30is removed, the relative positions of the light filter30and the photosensitive chip13will not change.

Optionally, in other examples of the camera module1000of the present invention, the glue material400may be applied along a extending direction of the electronic components12, for example, if the electronic components12of the camera module1000are in three rows; at this time, the glue material400is not applied into a state of surrounding the non-photosensitive area131of the photosensitive chip13, i.e., the glue material400is also not applied on a side of the photosensitive chip13where the electronic components12are not arranged. After the photosensitive chip30is mounted on the top of the glue material400, a gap will be formed between the light filter30and the circuit board assembly10, and then the gap formed between the light filter30and the circuit board assembly10may be sealed by replenishing glue or the like.

Referring toFIG.18, the lenses holder50is mounted on the circuit board11of the circuit board assembly10. In this preferred example of the camera module1000according to the present invention, the lower surface51of the lenses holder50is mounted on the circuit board11by the glue material400, and the inner surface53of the lenses holder50is attached to the glue material400.

After the lenses holder50is mounted on the circuit board11, the glue material400applied to the circuit board assembly10is cured, so that the bonding portion20is formed by the glue material400applied to the circuit board assembly10, and the light filter30is kept in the photosensitive path of on the photosensitive chip13by the bonding portion20; wherein a side portion of the glue material400bonded to the circuit board assembly10forms the lower bonding side21of the bonding portion20, and a side portion of the glue material400bonded to the light filter30forms the top bonding surface22; wherein the lower surface51of the lenses holder50is attached to the circuit board11by the glue material400, and the inner surface53of the lenses holder50is bonded to the bonding portion20.

It is worth mentioning that in the camera module1000according to the present invention, the way of curing the glue material400applied to the circuit board assembly10is not limited and it is selected on the basis of the type of the glue material400. For example, the glue material400applied to the circuit board assembly10may be cured by heating or ultraviolet light irradiation.

In the camera module1000according to the present invention, the top bonding surface22of the bonding portion20corresponds to the electronic components12arranged at the same height, so that a flatness of the top bonding surface22of the bonding portion20is ensured by the electronic components12arranged at the same height, thereby ensuring a flatness of the light filter30and the photosensitive area131of the photosensitive chip13.

Referring toFIG.19, the optical lenses40is mounted on the lenses bearing portion60, and the lenses bearing portion60is mounted on the upper surface52of the lenses holder50, so as to keep the optical lenses40in the photosensitive path of the photosensitive chip13, thereby manufacturing the camera module1000.

FIG.22shows a modified implementation of the camera module1000. The difference from the camera module1000shown inFIGS.14-20is that: in this specific example of the camera module1000shown inFIG.22, the camera module1000is not provided with the lenses bearing portion60, and the optical lenses40is directly mounted on the lenses holder50, so that the optical lenses40is kept in the photosensitive path of the photosensitive chip13by the lenses holder50. In the packaging process of the camera module1000shown inFIG.22, firstly the optical lenses40is mounted on the lenses holder50, and then the lenses holder50is mounted on the circuit board11of the circuit board assembly10, finally the glue material400applied to the circuit board assembly10is cured, so that the bonding portion20is formed by the glue material400applied to the circuit board assembly10.

FIG.23shows a modified implementation of the camera module1000. The difference from the camera module1000shown inFIGS.14-20is that: in this specific example of the camera module1000shown inFIG.23, the glue material400is only applied to the circuit board11of the circuit board assembly10, so that after the glue material400is cured, the lower bonding side21of the bonding portion20is only bonded to the circuit board11of the circuit board assembly10.

FIG.24shows a modified implementation of the camera module1000. The difference from the camera module1000shown inFIGS.14-20is that: in this specific example of the camera module1000shown inFIG.24, the glue material400is only applied to the non-photosensitive area132of the photosensitive chip13of the circuit board assembly10, so that after the glue material400is cured, the lower bonding side21of the portion20is only bonded to the non-photosensitive area132of the photosensitive chip13of the circuit board assembly10. In this specific example of the camera module1000shown inFIG.24, the top bonding surface22of the bonding portion20corresponds to the non-photosensitive area132of the photosensitive chip13, so that the flatness of the top bonding surface22of the bonding portion20is ensured by the non-photosensitive area132of the photosensitive chip13, thereby ensuring the flatness of the light filter30and the photosensitive area131of the photosensitive chip13.

FIG.25shows a modified implementation of the camera module1000. The difference from the camera module1000shown inFIGS.14-20is that: in this specific example of the camera module1000shown inFIG.25, the lower surface51of the lenses holder50is mounted on the circuit board11, and the lenses bearing portion60is mounted on the upper surface52of the lenses holder50, so that the optical lenses40is kept in the photosensitive path of the photosensitive chip13by the lenses holder50and the lenses bearing portion60. In the packaging process of the camera module1000shown inFIG.25, firstly the glue material400applied to the circuit board assembly10is cured, so as to form the bonding portion20by the glue material400applied to the circuit board assembly10, and then the lower surface51of the lenses holder50is mounted on the circuit board11, finally the lenses bearing portion60is mounted on the upper surface52of the lenses holder50, so that the optical lenses40is kept in the photosensitive path of the photosensitive chip13by the lenses bearing portion60.

FIG.26shows a modified implementation of the camera module1000. The difference from the camera module1000shown inFIGS.14-20is that: the lenses holder50further has at least one notch54extending from the lower surface51to a direction of the upper surface52, wherein after the lenses holder54is mounted on the circuit board11, a part of the glue material400applied to the circuit board assembly10is accommodated in the notch54of the lenses holder50. In this way, when the glue material400applied to the circuit board assembly10is cured, the gap54of the lenses holder50allows the glue material400to overflow from the inside of the lenses holder50to the outside, thereby preventing the glue material400from expanding inward and contaminating the photosensitive area131of the photosensitive chip13or blocking the photosensitive path of the photosensitive chip13. After the glue material400applied to the circuit board assembly10is cured to form the bonding portion20, a part of the bonding portion20is accommodated in the notch54of the lenses holder50. That is to say, in this specific example of the camera module1000shown inFIG.26, the notch54of the lenses holder50forms an opening for overflowing glue.

FIG.27shows a modified implementation of the camera module1000. The difference from the camera module1000shown inFIG.26is that: in this specific example of the camera module1000shown inFIG.27, the inner surface53of the side portion of the lenses holder50provided with the notch54is not mounted on the glue material400applied to the circuit board assembly10, and a gap is reserved between the inner surface53of the lenses holder50and the glue material400applied to the circuit board assembly10. In this way, when the glue material400applied to the circuit board assembly10is cured, the gap54of the lenses holder50allows the air held between the lenses holder50and the glue material400applied to the circuit board assembly10to escape, so that the glue material400applied to the circuit board assembly10is allowed to expand in a direction of the circuit board assembly10of the lenses holder50, thereby preventing the glue material400from expanding inward and contaminating the photosensitive area131of the photosensitive chip13or blocking the photosensitive path of the photosensitive chip13. After the glue material400applied to the circuit board assembly10is cured to form the bonding portion20, the gap54of the lenses holder50is sealed by the glue material400or other materials.

FIG.28shows a modified implementation of the camera module1000. The difference from the camera module1000shown inFIGS.14-20is that: in the camera module1000shown inFIG.28, the lenses holder50is integrally formed on the circuit board11and the bonding portion20. Particularly, after the glue material400applied to the circuit board assembly10is cured to form the bonding portion20, the lenses holder50is formed by a molding process, so that the lower surface51of the lenses holder50is integrally bonded to the circuit board11, and the inner surface53of the lenses holder50is integrally bonded to the bonding portion20, thereby manufacturing the camera module1000shown inFIG.28.

According to another aspect of the present invention, the present invention further provides a manufacturing method of a camera module1000, wherein the manufacturing method includes the following steps:(a) respectively bonding the lower bonding side21of the bonding portion20to the circuit board assembly10and bonding the light filter30to the top bonding surface22of the bonding portion20, so as to keep the light filter30in the photosensitive path of the photosensitive chip13of the circuit board assembly10; and(b) keeping the optical lenses40in the photosensitive path of the photosensitive chip13to manufacture the camera module1000.

In a preferred example of the manufacturing method of the present invention, the step (a) further includes the following steps:(a.1) applying glue material400to the circuit board assembly10around the photosensitive area131of the photosensitive chip13;(a.2) mounting the light filter30on the top of the glue material400; and(a.3) curing the glue material400to form the bonding portion20, wherein a side portion of the glue material400bonded to the circuit board assembly10forms the lower bonding side21of the bonding portion20, and a side portion of the glue material400bonded to the light filter30forms the top bonding surface22of the bonding portion20.

Preferably, in the step (a.1), the glue material400applied to the circuit board assembly10surrounds the photosensitive area131of the photosensitive chip13, so that after the light filter30is mounted on the top of the glue material400, a sealed space is formed between the light filter30, the glue material400and the photosensitive chip13, and the photosensitive area131of the photosensitive chip13is kept in the sealed space. In this way, during the process of packaging the camera module1000, it is possible to prevent dust and other contaminants from falling into the photosensitive area131of the photosensitive chip13to cause undesirable phenomenon of stain defects. Optionally, in the step (a.1), the glue material400is only applied along an extending direction of the electronic components12of the circuit board assembly10, and after the light filter30is mounted on the top of the glue material400, a gap formed between the light filter30and the circuit board assembly10is sealed. For example, the gap formed between the light filter30and the circuit board assembly10may be sealed with the glue material400by replenishing glue.

In the step (a.2), a pressure is applied to the light filter30in a direction of the photosensitive chip13, so that the light filter30is mounted on the top of the glue material400. In this way, the light filter30forms a flat surface on the top of the glue material400, and at this time, a flatness between the light filter30and the photosensitive area131of the photosensitive chip13may be ensured by the glue material400, so that after the glue material400is cured to form the bonding portion20, the flatness between the light filter30and the photosensitive area131of the photosensitive chip13may be ensured by the bonding portion20.

In a preferred example of the manufacturing method of the present invention, before the step (a.3), the step (a) further includes the step of: mounting the lenses holder50on the circuit board11of the circuit board assembly10, so that in the step (a.3), the lower surface51of the lenses holder50is bonded to the circuit board11, and the inner surface53of the lenses holder50is bonded to the bonding portion20. In this way, the packaging relationship between the lenses holder50, the bonding portion20, and the circuit board assembly10may be more reliable.

Preferably, the lenses holder50is provided with the notch54, so that during the process of curing the glue material400, the glue material400is allowed to overflow from the notch54of the lenses holder50, thereby avoiding the undesirable phenomenon of contaminating the photosensitive area131of the photosensitive chip13or blocking the photosensitive path of the photosensitive chip13by the expansion of the glue material400in a direction of the photosensitive area131of the photosensitive chip13. Optionally, when the lenses holder50is mounted on the circuit board11of the circuit board assembly10, the inner surface53of the side portion of the lenses holder50provided with the notch54is not attached to the glue material400, so that a gap is formed between the glue material400and the inner surface53of the lenses holder50, and during the process of curing the glue material400, the air held between the glue material400and the inner surface53of the lenses holder50is allowed to overflows from the notch54of the lenses holder50, thereby guiding the glue material400to expand in a direction of the inner surface53of the lenses holder50. In this way, it is possible to avoid the undesirable phenomenon of contaminating the photosensitive area131of the photosensitive chip13or blocking the photosensitive path of the photosensitive chip13by the expansion of the glue material400in a direction of the photosensitive area131of the photosensitive chip13.

In a preferred example of the manufacturing method of the present invention, the step (a) further includes the following steps:(a.1′) forming the ring-shaped boss200on the peripheral edges of the light filter30;(a.2′) mounting the ring-shaped boss200on the non-photosensitive area132of the photosensitive chip13; and(a.3′) curing the ring-shaped boss200to form the bonding portion20, wherein a side portion of the ring-shaped boss200bonded to the non-photosensitive area132of the photosensitive chip13forms the lower bonding side21of the bonding portion20, and a side portion of the ring-shaped boss200bonded to the light filter30forms the top bonding surface22of the bonding portion20.

In another preferred example of the manufacturing method of the present invention, the step (a) further includes the following steps:(a.1″) forming the ring-shaped boss200on the non-photosensitive area131of the photosensitive chip13;(a.2″) mounting the peripheral edges of the light filter30on the ring-shaped boss200; and(a.3″) curing the ring-shaped boss200to form the bonding portion20, wherein a side portion of the ring-shaped boss200bonded to the non-photosensitive area132of the photosensitive chip13forms the lower bonding side21of the bonding portion20, and a side portion of the ring-shaped boss200bonded to the light filter30forms the top bonding surface22of the bonding portion20.

Those skilled in the art may understand that, the above embodiments are only examples, in which the features of different embodiments may be combined with each other to obtain implementations that are easily conceivable according to the disclosure of the present invention but are not clearly indicated in the accompanying drawings.

Those skilled in the art should understand that, the above description and the embodiments of the present invention shown in the drawings are only examples and do not limit the present invention. The purpose of the present invention has been completely and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any deformation or modification.