Patent Description:
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> shows a typical camera module in the prior art, which includes a circuit board 1P, a set of electronic components 2P, a photosensitive chip 3P, a lens holder 4P, a light filter 5P, a lens bearing portion 6P, and a lens unit 7P. Firstly, a set of the electronic components 2P are mounted on the circuit board 1P at intervals; secondly, the photosensitive chip 3P is mounted on the circuit board 1P, and the photosensitive chip 3P is conductively connected to the circuit board 1P through at least one set of gold wires 8P, wherein a set of the electronic components 2P surrounds the photosensitive chip 3P; thirdly, the lens holder 4P is mounted on the circuit board 1P by surrounding the photosensitive chip 3P, and a light filter bearing arm 41P of the lens holder 4P protrudes from an inner wall of the lens holder 4P, so as to extend toward the direction of the photosensitive path of the photosensitive chip 3P; fourthly, the light filter 5P is mounted on the light filter bearing arm 41P of the lens holder 4P, so as to maintain the light filter 5P in the photosensitive path of the photosensitive chip 3P; fifthly, the lens unit 7P is arranged on the lens bearing portion 6P, and the lens bearing portion 6P is mounted on the lens holder 4P, so as to maintain the lens unit 7P in the photosensitive path of the photosensitive chip 3P. In the camera module of the prior art, the light filter 5P needs to be carried by the light filter bearing arm 41P of the lens holder 4P. Therefore, the lens holder 4P must be designed to have a structure of the light filter bearing arm 41P, and this causes the lens holder 4P 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 arm 41P of the lens holder 4P from contacting with the electronic component 2P, a space needs to be reserved between the light filter bearing arm 41P and the electronic component 2P, this also makes it difficult to reduce the size in height of the camera module.

<CIT> refers to an image capturing module and molded photosensitive assembly therefor, molded photosensitive assembly semi-finished product and manufacturing method, and electronic device.

The present disclosure provides a photosensitive assembly according to claim <NUM>, a camera module according to claim <NUM>, and an electronic device according to claim <NUM>. Some features of optional or preferred embodiments are recited in the dependent claims.

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 lens holder, so as to save height space occupied by the lens 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 <NUM> 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 lens 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 lens bearing portion and the lower surface of the light filter may be reduced to <NUM> 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 lens 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 lens holder is bonded to the circuit board, and the inner surface of the lens 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 lens holder has at least one notch, so that glue material for forming the bonding portion may be discharged from the notch of the lens holder during the process of mounting the lens holder on the circuit board assembly and heating the lens 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 lens holder may be discharged from the notch during the process of mounting the lens holder on the circuit board assembly and heating the lens holder, thereby guiding the glue material to expand toward the direction of the inner surface of the lens 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:.

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 <NUM>.

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 <NUM>.

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

According to an embodiment of the present invention, the camera module further includes a lens holder, wherein the lens 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 lens holder is mounted on the circuit board, and the inner surface of the lens holder is bonded to the bonding portion.

According to an embodiment of the present invention, the camera module further includes a lens holder, wherein the lens 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 lens holder is bonded to the circuit board, and the inner surface of the lens holder is bonded to the bonding portion.

According to an embodiment of the present invention, the camera module further includes a lens holder, wherein the lens 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 lens holder is bonded to the circuit board and the non-photosensitive area of the photosensitive chip, and the inner surface of the lens 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 lens holder and the circuit board.

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

According to an embodiment of the present invention, the camera module further includes a lens bearing portion having a mounting surface, wherein the lens bearing portion is mounted on the lens holder by attaching the mounting surface of the lens bearing portion to the upper surface of the lens holder, and the optical lens unit is arranged on the lens 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 lens bearing portion and the lower surface of the light filter is: <NUM>≤D≤<NUM>.

According to an embodiment of the present invention, a range of value of a back focal length parameter L of the camera module is: <NUM>≤L≤<NUM>, wherein the back focal length of the camera module refers to a distance between a lower surface of a lens of the optical lens unit 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:.

According to another aspect of the present invention, the present invention further provides a photosensitive assembly including:.

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 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:.

According to an embodiment of the present invention, the step (a) further includes the following steps:.

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

According to an embodiment of the present invention, in the step (a. <NUM>), the glue material is configured to overflow from a notch of the lens holder.

According to an embodiment of the present invention, in the step (a. <NUM>), the glue material is guided to expand toward a direction of the inner surface of the lens 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 lens holder is allowed to escape from a notch of the lens holder, thereby guiding the glue material to expand toward the direction of the inner surface of the lens holder.

According to an embodiment of the present invention, in the step (a. <NUM>), a glue material is applied to a non-photosensitive area of the photosensitive chip, so that in the step (a. <NUM>), 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. <NUM>), 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. <NUM>), 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. <NUM>), 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. <NUM>), 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. <NUM>), 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. <NUM>) and the step (a. <NUM>), a gap formed between the light filter and the circuit board assembly is sealed.

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 <NUM>.

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 <NUM>.

According to an embodiment of the present invention, in the step (a. <NUM>'), 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, in the step (a. <NUM>"), 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 lens holder on a circuit board of the circuit board assembly, so that in the step (c), the optical lens unit is kept in the photosensitive path of the photosensitive chip by the lens holder.

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

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 to <FIG> of the accompanying drawings of the specification of the present invention, a camera module <NUM> according to the first preferred embodiment of the present invention is disclosed and explained in the following description, wherein the camera module <NUM> includes a circuit board assembly <NUM>, a bonding portion <NUM>, a light filter <NUM>, and an optical lens unit <NUM>.

Referring to <FIG>, the circuit board assembly <NUM> includes a circuit board <NUM> and a set of electronic components <NUM> conductively connected to the circuit board <NUM>, and there is a gap between the adjacent electronic components <NUM>. The manner of conductively connecting the electronic component <NUM> to the circuit board <NUM> is not limited. For example, in the specific example of the camera module <NUM> shown in <FIG>, the electronic component <NUM> is conductively connected to the circuit board <NUM> by being mounted on the surface of the circuit board <NUM>. Optionally, the electronic component <NUM> is conductively connected to the circuit board <NUM> in such a manner that at least a part of it is embedded inside of the circuit board <NUM>.

Further referring to <FIG>, the circuit board assembly <NUM> further includes a photosensitive chip <NUM>, which has a photosensitive area <NUM> and a non-sensitive area <NUM> surrounding the photosensitive area <NUM>, wherein the photosensitive chip <NUM> is conductively connected to the circuit board <NUM>. The manner of conductively connecting the photosensitive chip <NUM> to the circuit board <NUM> is not limited. For example, in the specific example of the camera module <NUM> shown in <FIG>, the photosensitive chip <NUM> is mounted on the surface of the circuit board <NUM>, and two ends of at least one set of guiding wires <NUM> formed by a wire bonding process are conductively connected to the photosensitive chip <NUM> and the circuit board <NUM>, respectively, so that the photosensitive chip <NUM> is conductively connected to the circuit board <NUM>. Optionally, the photosensitive chip <NUM> is mounted on the circuit board <NUM> and conductively connected to the circuit board <NUM> by a flip-chip process.

Particularly, in the camera module <NUM> shown in <FIG>, a set of the electronic components <NUM> form two rows of the electronic components <NUM>, wherein one row of the electronic components <NUM> are located on the left side of the photosensitive chip <NUM>, another row of the electronic components <NUM> are located on the right side of the photosensitive chip <NUM>. Optionally, a set of the electronic components <NUM> form three rows of the electronic components <NUM>, wherein the three rows of the electronic components <NUM> are respectively located on three sides of the photosensitive chip <NUM>. Optionally, a set of the electronic components <NUM> form four rows of the electronic components <NUM>, wherein the four rows of the electronic components <NUM> are located on four sides of the photosensitive chip <NUM>. Optionally, more than two rows of the electronic components <NUM> may also be arranged on a same side of the photosensitive chip <NUM>. Therefore, the relative arrangement of the electronic components <NUM> and the photosensitive chip <NUM> shown in <FIG> are only for reference, and should not be regarded as a limitation to the content and scope of the camera module <NUM> of the present invention.

The bonding portion <NUM> is ring-shaped and has a lower bonding side <NUM>, a top bonding surface <NUM> corresponding to the lower bonding side <NUM>, and a light path <NUM> extending from the top bonding surface <NUM> to the lower bonding side <NUM>. The lower bonding side <NUM> of the bonding portion <NUM> is bonded to the circuit board assembly <NUM>, and the bonding portion <NUM> surrounds the photosensitive area <NUM> of the photosensitive chip <NUM>; a plane on which the top bonding surface <NUM> of the bonding portion <NUM> is located is higher than a plane on which the photosensitive area <NUM> of the photosensitive chip <NUM> is located, and the photosensitive area <NUM> of the photosensitive chip <NUM> corresponds to the light path <NUM> of the bonding portion <NUM>. Periphery of the light filter <NUM> is bonded to the top bonding surface <NUM> of the bonding portion <NUM>, so that the light filter <NUM> is kept in the photosensitive path of the photosensitive chip <NUM>. The optical lens unit <NUM> is kept in the photosensitive path of the photosensitive chip <NUM>. In this preferred example of the camera module <NUM> of the present invention shown in <FIG>, the bonding portion <NUM> is in a shape of a square ring, i.e., the bonding portion <NUM> has four sides <NUM>, wherein two adjacent sides <NUM> are connected end to end and perpendicular to each other, so that the light path <NUM> is formed between the bonding portions <NUM> formed by the four sides <NUM>. Each side <NUM> of the bonding portion <NUM> is respectively located outside the photosensitive area <NUM> of the photosensitive chip <NUM>.

Preferably, the lower bonding side <NUM> of the bonding portion <NUM> is bonded to the non-photosensitive area <NUM> of the photosensitive chip <NUM>, and the bonding portion <NUM> extends upward from the non-photosensitive area <NUM> of the photosensitive chip <NUM> to a suitable height, and forms the top bonding surface <NUM> of the bonding portion <NUM>; and the top bonding surface <NUM> of the bonding portion <NUM> corresponds to the non-photosensitive area <NUM> of the photosensitive chip <NUM>; in this way, a flatness of the top bonding surface <NUM> of the bonding portion <NUM> may be ensured by the non-photosensitive area <NUM> of the photosensitive chip <NUM>, thereby ensuring the flatness between the light filter <NUM> and the photosensitive area <NUM> of the photosensitive chip <NUM>.

A distance size (parameter H) between the plane on which the top bonding surface <NUM> of the bonding portion <NUM> is located and the plane on which the photosensitive area <NUM> of the photosensitive chip <NUM> is located is greater than or equal to <NUM>. 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 module <NUM>.

A width size (parameter W) of the side <NUM> of the bonding portion <NUM> is greater than or equal to <NUM>. In this way, packaging tolerances may be compensated, so that the light filter <NUM> is reliably supported in the photosensitive path of the photosensitive chip <NUM> by the bonding portion <NUM>.

In the present invention, the circuit board assembly <NUM>, the bonding portion <NUM>, and the light filter <NUM> form a photosensitive assembly, i.e., the camera module <NUM> includes the photosensitive assembly and the optical lens unit <NUM> which is kept in the photosensitive path of the photosensitive chip <NUM>, and the light entering the inside of the camera module <NUM> from the optical lens unit <NUM> may be received by the photosensitive chip <NUM> and photo-electrically converted.

Further to refer to <FIG>, the camera module <NUM> further includes a lens holder <NUM> and a lens bearing portion <NUM> mounted on the lens holder <NUM>. The lens holder <NUM> has a lower surface <NUM>, an upper surface <NUM> corresponding to the lower surface <NUM>, and an inner surface <NUM> extending from the upper surface <NUM> to the lower surface <NUM>. The lower surface <NUM> of the lens holder <NUM> is integrally bonded to the circuit board <NUM> and the non-photosensitive area <NUM> of the photosensitive chip <NUM>, and the inner surface <NUM> of the lens holder <NUM> is integrally bonded to the bonding portion <NUM>. The optical lens unit <NUM> is arranged on the lens bearing portion <NUM>, and the lens bearing portion <NUM> has a mounting surface <NUM>, wherein the lens bearing portion <NUM> is mounted on the lens holder <NUM> in such a manner that the mounting surface <NUM> of the lens bearing portion <NUM> is mounted on the upper surface <NUM> of the lens holder <NUM>, so that the optical lens unit <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the lens holder <NUM> and the lens bearing portion <NUM>.

The type of the lens bearing portion <NUM> is selected according to the type of the camera module <NUM>. For example, when the camera module <NUM> is a fixed-focus camera module, the lens bearing portion <NUM> is selected as a lens barrel. Correspondingly, when the camera module <NUM> is a zoom camera module, the lens bearing portion <NUM> is selected as a motor, such as but not limited to a voice coil motor.

Referring to <FIG>, preferably, a parameter of a distance between the mounting surface <NUM> of the lens bearing portion <NUM> and the lower surface of the light filter <NUM> is set as D, and a range of value of the parameter D is <NUM>-<NUM> (including <NUM> and <NUM>) to help reduce the size in height of the camera module <NUM>. It is worth mentioning that, in the camera module <NUM> of the present invention, the light filter <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the bonding portion <NUM>, and the lens bearing portion <NUM> is mounted on the lens holder <NUM>, so that compared to the camera module in prior art, in this preferred example of the camera module <NUM> of the present invention, the distance between the mounting surface <NUM> of the lens bearing portion <NUM> and the lower surfaces of the light filter <NUM> may be smaller, which is particularly important for reducing the size in height of the camera module <NUM>.

Further referring to <FIG>, in this preferred example of the camera module <NUM> according to the present invention, the light filter <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the bonding portion <NUM>, and the lens bearing portion <NUM> is mounted on the lens holder <NUM> so that the optical lens unit <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the lens bearing portion <NUM> and the lens holder <NUM>. Since the lens holder <NUM> does not need to keep the light filter <NUM> in the photosensitive path of the photosensitive chip <NUM>, a height of the upper surface <NUM> of the lens holder <NUM> (the distance from the upper surface <NUM> to the photosensitive chip <NUM>) may be reduced, thereby reducing a distance between the optical lens unit <NUM> and the photosensitive area <NUM> of the photosensitive chip <NUM>. In this way, a back focus size of the camera module <NUM> may be reduced, thereby facilitating to reduce the size in height of the camera module <NUM>. The back focal length of the camera module <NUM> refers to a distance between a surface of a lens of the optical lens unit <NUM> which is closest to the photosensitive chip <NUM> and the photosensitive area <NUM> of the photosensitive chip <NUM>. A parameter of the back focal length of the camera module <NUM> is set as L, wherein a range of value of the parameter L is <NUM>-<NUM> (including <NUM> and <NUM>), as compared with the back focal length of <NUM> in the camera module of prior art, the back focal length of the camera module <NUM> according to the present invention may be reduced by a large value, thereby facilitating to reduce the size in height of the camera module <NUM>.

Optionally, in an example of the camera module <NUM>, the lens bearing portion <NUM> and the lens holder <NUM> may be an integrated structure. In another example of the camera module <NUM>, the camera module <NUM> may not be configured with the lens bearing portion <NUM>. In this case, the camera module <NUM> keeps the optical lens unit <NUM> in the photosensitive path of the photosensitive chip <NUM> by directly mounting the optical lens unit <NUM> on the lens holder <NUM>.

In the camera module <NUM> shown in <FIG>, the lens holder <NUM> is not prefabricated, wherein the lens holder <NUM> may be integrally formed by a molding process and bonded to the circuit board assembly <NUM> and the bonding portion <NUM>, thereby allowing the lower surface <NUM> of the lens holder <NUM> to be integrally bonded to the circuit board <NUM> and the non-photosensitive area <NUM> of the photosensitive chip <NUM>, and allowing the inner surface <NUM> of the lens holder <NUM> to be integrally bonded to the bonding portion <NUM>. In this way, the reliability for bonding the lens holder <NUM> to the circuit board <NUM>, the photosensitive chip <NUM>, and the bonding portion <NUM> is higher, thereby facilitating to ensure the stability and reliability of the camera module <NUM>. Optionally, the lens holder <NUM> may be further integrally bonded to the peripheral edges of the light filter <NUM>.

The camera module <NUM> adopts a manner in which the lens holder <NUM> is integrally bonded to the circuit board <NUM> and the non-photosensitive area <NUM> of the photosensitive chip <NUM>, so that the packaging process of the camera module <NUM> no longer requires the lens holder <NUM> to be prefabricated, thereby facilitating to reduce the cost and risk of the management and control of the components of the camera module <NUM>.

The camera module <NUM> adopts a manner in which the lens holder <NUM> is integrally bonded to the circuit board <NUM> and the non-photosensitive area <NUM> of the photosensitive chip <NUM>; this is not only beneficial to ensure the reliability of the bonding relationship of the circuit board <NUM> and the photosensitive chip <NUM>, and the flatness of the photosensitive chip <NUM> is no longer limited by the flatness of the circuit board <NUM>; wherein the flatness of the photosensitive chip <NUM> is ensured by the lens holder <NUM>, thereby facilitating to ensure the flatness of the photosensitive chip <NUM>. Particularly, in such a manner that the lens holder <NUM> is integrally bonded to the circuit board <NUM> and the non-photosensitive area <NUM> of the photosensitive chip <NUM> through a molding die, the top surface of the lens holder <NUM> may be made flatter and is not affected by the inclination or deformation of the circuit board <NUM>, so as to reduce cumulative tolerances during the subsequent assembly; in this way, it is beneficial to ensure the coaxiality of the optical lens unit <NUM> and the photosensitive chip <NUM>.

The camera module <NUM> adopts a manner in which the lens holder <NUM> is integrally bonded to the circuit board <NUM> and the non-photosensitive area <NUM> of the photosensitive chip <NUM>, so that the lens holder <NUM> ensures the flatness of the photosensitive chip <NUM>; in this way, a thinner size may be selected for the circuit board <NUM>, thereby facilitating to reduce the size in height of the camera module <NUM>. Particularly, in such a manner that the lens holder <NUM> is integrally bonded to the circuit board <NUM> through a molding process, the lens holder <NUM> may reinforce the circuit board <NUM>, so that the circuit board <NUM> may be thinner under the premise of ensuring the flatness of the circuit board <NUM>, and this is beneficial to reduce the overall size in height of the camera module <NUM>.

The camera module <NUM> adopts the manner in which the lens holder <NUM> is integrally bonded to the circuit board <NUM> and the non-photosensitive area <NUM> of the photosensitive chip <NUM>, and this may avoid using glue to mount the lens holder <NUM> on the circuit board <NUM>, thereby facilitating to reduce the height size of the camera module <NUM>.

Referring to <FIG>, the camera module <NUM> adopts a manner in which the light filter <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the bonding portion <NUM>. On one hand, the cost of the camera module <NUM> may be reduced by reducing the size of the light filter <NUM>; on the other hand, the lower surface of the light filter <NUM> (the surface of the light filter <NUM> facing the photosensitive chip <NUM>) may be lower than the height of the top surface of the highest electronic component <NUM>. In this way, in conjunction with the improvement in the optical design of the camera module <NUM>, and after reducing the back focus of the camera module <NUM>, the light filter <NUM> of the camera module <NUM> may be closer to the photosensitive chip <NUM>, so that the optical lens unit <NUM> has the possibility of being adjusted toward the direction of the photosensitive chip <NUM>, thereby facilitating to reduce the height size of the camera module <NUM>.

<FIG> show the packaging process of the camera module <NUM>.

Referring to <FIG>, a set of the electronic components <NUM> are mounted on the circuit board <NUM>. The type of the electronic component <NUM> is not limited in the camera module <NUM> of the present invention. For example, the electronic component <NUM> may be, but not limited to, a resistor, a capacitor, a controller, and the like.

Referring to <FIG>, the photosensitive chip <NUM> is mounted on the circuit board <NUM>, and at least one set of guiding wires <NUM> with the two ends being conductively connected to the photosensitive chip <NUM> and the circuit board <NUM> respectively are formed by a wire bonding process, so as to form the circuit board assembly <NUM>.

It is worth mentioning that, the stage shown in <FIG> may be prior to the stage shown in <FIG>, i.e., firstly the photosensitive chip <NUM> is mounted on the circuit board <NUM>, and then a set of the electronic components <NUM> are mounted on the circuit board <NUM> to form the circuit board assembly <NUM>.

Referring to <FIG>, a ring-shaped boss <NUM> is formed around one side portion of the light filter <NUM>, so as to form a light filter <NUM> with a ring-shaped boss. For example, in the preferred example of the camera module <NUM> shown in <FIG>, the ring-shaped boss <NUM> may be formed around one side portion of the light filter <NUM> through a screen printing process, so as to form the light filter <NUM> with the ring-shaped boss. Optionally, the ring-shaped boss <NUM> may also be formed around one side portion of the light filter <NUM> through a photolithography process, so as to form the light filter <NUM> with the ring-shaped boss. The material for forming the ring-shaped boss <NUM> may be, but is not limited to, colloid.

It is worth mentioning that, the sequence of forming the circuit board assembly <NUM> and forming the light filter <NUM> with the ring-shaped boss is not limited.

Referring to <FIG>, firstly, the light filter <NUM> with the ring-shaped boss is mounted on the circuit board assembly <NUM>, wherein the ring-shaped boss <NUM> is mounted on the non-photosensitive area <NUM> of the photosensitive chip <NUM>; for example, in an example, if the material of the ring-shaped boss <NUM> is a colloidal material, the ring-shaped boss <NUM> may be directly mounted on the non-photosensitive area <NUM> of the photosensitive chip <NUM>; in another example, if the material of the ring-shaped boss <NUM> is non-colloid, it is necessary to mount the ring-shaped boss <NUM> on the non-photosensitive area <NUM> of the photosensitive chip <NUM> by glue or a similar substance; secondly, the ring-shaped boss <NUM> is cured, so that the ring-shaped boss <NUM> forms the bonding portion <NUM>, and the light filter <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the bonding portion <NUM>, wherein the surface of the ring-shaped boss <NUM> bonded to the photosensitive chip <NUM> forms the lower bonding side <NUM> of the bonding portion <NUM>, and the surface of the ring-shaped boss <NUM> bonded to the light filter <NUM> forms the top bonding surface <NUM> of the bonding portion <NUM>, and a hollow portion in the middle of the ring-shaped boss <NUM> forms the light path <NUM> of the bonding portion <NUM>.

It is worth mentioning that, the way of curing the ring-shaped boss <NUM> is not limited, and it is selected according to the material for forming the ring-shaped boss <NUM>. For example, the ring-shaped boss <NUM> may be cured by heating or irradiation with ultraviolet light, so as to form the bonding portion <NUM>.

Referring to <FIG>, the lens holder <NUM> is formed on the circuit board assembly <NUM> and the bonding portion <NUM> through a molding process, so that the lower surface <NUM> of the lens holder <NUM> is integrally bonded to the circuit board <NUM> and the photosensitive chip <NUM> of the circuit board assembly <NUM>, and the inner surface <NUM> of the lens holder <NUM> is integrally bonded to the bonding portion <NUM>. Preferably, the lens holder <NUM> embeds the electronic components <NUM> and the guiding wires <NUM> protruding from the circuit board <NUM>; in this way, firstly, there is no need to reserve a safe space between the lens holder <NUM> and the electronic components <NUM>, thereby facilitating to reduce the height size of the camera module <NUM>; secondly, the lens holder <NUM> prevents the electronic components <NUM> from being exposed, thereby preventing the pollutants such as debris falling off the surface of the electronic components <NUM> from contaminating other electronic components <NUM> or contaminating the photosensitive chip <NUM>; thirdly, the upper surface <NUM> of the lens holder <NUM> has a higher flatness, so that after the optical lens unit <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by mounting the lens bearing portion <NUM> on the upper surface <NUM> of the lens holder <NUM>, the central axis of the optical lens unit <NUM> and the central axis of the photosensitive area <NUM> of the photosensitive chip <NUM> may be overlapped, so as to ensure the imaging quality of the camera module <NUM>; fourthly, the lens holder <NUM> may be filled in the space between the adjacent electronic components <NUM>, so as to isolate the adjacent electronic components <NUM> and prevent the adjacent electronic components <NUM> from interfering with each other. In this way, a distance between the adjacent electronic components <NUM> may be smaller, so that the camera module <NUM> may be equipped with a larger number and larger size of the electronic components <NUM>.

Referring to <FIG>, the optical lens unit <NUM> is mounted on the lens bearing portion <NUM>, and the lens bearing portion <NUM> is mounted on the upper surface <NUM> of the lens holder <NUM>, so as to keep the optical lens unit <NUM> in the photosensitive path of the photosensitive chip <NUM>, thereby manufacturing the camera module <NUM>.

Optionally, in another manufacturing process of the camera module <NUM>, firstly, the ring-shaped boss <NUM> is formed in the non-photosensitive area <NUM> of the photosensitive chip <NUM> by a screen printing process or a photolithography process; secondly, the light filter <NUM> is mounted on the ring-shaped boss <NUM>, for example, glue or similar substance may be used to mount the light filter <NUM> on the ring-shaped boss <NUM>; then, the ring-shaped boss <NUM> is cured, so that the ring-shaped boss <NUM> forms the bonding portion <NUM>, and the light filter <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the bonding portion <NUM>, wherein a surface for bonding the ring-shaped boss <NUM> to the photosensitive chip <NUM> forms the lower bonding side <NUM> of the bonding portion <NUM>, a surface for bonding the ring-shaped boss <NUM> to the light filter <NUM> forms the top bonding surface <NUM> of the bonding portion <NUM>, and the hollow portion in the middle of the ring-shaped boss <NUM> forms the light path <NUM> of the bonding portion <NUM>.

<FIG> shows an application state of the camera module <NUM>, wherein the camera module <NUM> is arranged in an electronic device body <NUM>, so that the electronic device body <NUM> and the camera module <NUM> form an electronic device. It is worth mentioning that, the example in which the electronic device is a smart phone shown in <FIG> is only an example, which does not limit the application scope of the camera module <NUM> according 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/<NUM>/<NUM>.

<FIG> shows a modified implementation of the camera module <NUM>, and <FIG> shows an application state of the camera module <NUM>. The difference from the camera module <NUM> shown in <FIG> is that: in this specific example of the camera module <NUM> shown in <FIG>, the camera module <NUM> has four side portions <NUM>, wherein at least one side portion <NUM> of the camera module <NUM> further has a side surface <NUM>, a bottom surface <NUM>, and a connecting surface <NUM> connected to the side surface <NUM> and the bottom surface <NUM>, and wherein a distance L1 from a connection position of the side surface <NUM> and the connecting surface <NUM> to a central axis of the camera module <NUM> is greater than a distance L2 from a connection position of the bottom surface <NUM> and the connecting surface <NUM> to the central axis of the camera module <NUM>, so that at least one side portion <NUM> of the camera module <NUM> has a retracting portion, so as to match a turning part of a housing of the electronic device body; in this way, the optical lens unit <NUM> of the camera module <NUM> may be closer to the edge of the housing <NUM> of the electronic device body <NUM>, 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 in <FIG>, it can be seen that the distance between the camera module <NUM> of the present invention and the edge of the housing <NUM> of the electronic device body <NUM> is smaller, thereby facilitating to increase the screen-to-body ratio of the electronic device.

<FIG> shows a relationship between the camera module <NUM> and the housing <NUM> of the electronic device body <NUM> after the camera module <NUM> is arranged in the electronic device body to form the electronic device, wherein a side portion <NUM> with a locking portion of the camera module <NUM> corresponds to the turning part of the housing <NUM> of the electronic device body <NUM>, so that the optical lens unit <NUM> of the camera module <NUM> may be closer to the edge of the housing <NUM> of the electronic device body <NUM>, so as to increase the screen-to-body ratio of the electronic device. The connecting surface <NUM> of the camera module <NUM> is an inclined plane, referring to <FIG>; or the connecting surface <NUM> of the camera module <NUM> is a convex curved surface, referring to <FIG>; wherein the connecting surface <NUM> of the camera module <NUM> may be formed by removing a part of the circuit board <NUM> and/or a part of the lens holder <NUM>. For example, a part of the circuit board <NUM> and a part of the lens holder <NUM> may be removed by cutting or grinding the circuit board <NUM> and/or the lens holder <NUM>. Optionally, the connecting surface <NUM> of the camera module <NUM> is a step surface, referring to <FIG>; wherein the connecting surface <NUM> of the camera module <NUM> may be formed by retracting the circuit board <NUM> in the process of packaging the camera module <NUM>. Optionally, the connecting surface <NUM> of the camera module <NUM> may also be formed by removing a part of the circuit board <NUM> or removing a part of the circuit board <NUM> and the lens holder <NUM> after the camera module <NUM> is packaged.

<FIG> shows another modified implementation of the camera module <NUM>. The difference from the camera module <NUM> shown in <FIG> is that: in this preferred example of the camera module shown in <FIG>, the camera module <NUM> does not have the lens bearing portion <NUM>, wherein the lens holder <NUM> is mounted on the circuit board <NUM> of the circuit board assembly <NUM>, and the optical lens unit <NUM> is mounted on the lens holder <NUM>, so that the optical lens unit <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the lens holder <NUM>.

Referring to <FIG> of the accompanying drawings of the specification according to the present invention, a camera module <NUM> according to the second preferred embodiment of the present invention is disclosed and explained in the following description, wherein the camera module <NUM> includes a circuit board assembly <NUM>, a bonding portion <NUM>, a light filter <NUM>, and an optical lens unit <NUM>.

Referring to <FIG>, the circuit board assembly <NUM> includes a circuit board <NUM> and a set of electronic components <NUM> conductively connected to the circuit board <NUM>, and there is a gap between the adjacent electronic components <NUM>. The manner in which the electronic component <NUM> is conductively connected to the circuit board <NUM> is not limited; for example, in the specific example of the camera module <NUM> shown in <FIG>, the electronic component <NUM> is conductively connected to the circuit board <NUM> by being mounted on the surface of the circuit board <NUM>. Optionally, the electronic component <NUM> is conductively connected to the circuit board <NUM> in such a manner that at least a part of it is embedded inside the circuit board <NUM>.

Further referring to <FIG>, the circuit board assembly <NUM> further includes a photosensitive chip <NUM> which has a photosensitive area <NUM> and a non-sensitive area <NUM> surrounding the photosensitive area <NUM>, wherein the photosensitive chip <NUM> is conductively connected to the circuit board <NUM>. In addition, a height difference between the photosensitive area <NUM> and the non-photosensitive area <NUM> of the photosensitive chip <NUM> is not limited to a height difference shown in <FIG>. The way of conductively connecting the photosensitive chip <NUM> to the circuit board <NUM> is not limited; for example, in the specific example of the camera module <NUM> shown in <FIG>, the photosensitive chip <NUM> is mounted on the surface of the circuit board <NUM>, and two ends of at least one set of guiding wires <NUM> formed by a wire bonding process are conductively connected to the photosensitive chip <NUM> and the circuit board <NUM> respectively, so that the photosensitive chip <NUM> is conductively connected to the circuit board <NUM>. Optionally, the photosensitive chip <NUM> is mounted on the circuit board <NUM> by a flip-chip process and conductively connected to the circuit board <NUM>.

Particularly, in the camera module <NUM> shown in <FIG>, a set of the electronic components <NUM> form two rows of the electronic components <NUM>, wherein one row of the electronic components <NUM> are located on the left side of the photosensitive chip <NUM>, and the other row of the electronic component <NUM> are located on the right side of the photosensitive chip <NUM>. Optionally, a set of the electronic components <NUM> form three rows of the electronic components <NUM>, wherein the three rows of the electronic components <NUM> are respectively located on three sides of the photosensitive chip <NUM>. Optionally, a set of the electronic components <NUM> form four rows of the electronic components <NUM>, wherein the four rows of the electronic components <NUM> are respectively located on four sides of the photosensitive chip <NUM>. Optionally, more than two rows of the electronic components <NUM> may also be arranged on the same side of the photosensitive chip <NUM>. Therefore, the relative arrangement of the electronic components <NUM> and the photosensitive chip <NUM> shown in <FIG> are only for reference, and should not be regarded as a limitation to the content and scope of the camera module <NUM> of the present invention.

The bonding portion <NUM> is ring shaped and has a lower bonding side <NUM>, a top bonding surface <NUM> corresponding to the lower bonding side <NUM>, and a light path <NUM>. The lower bonding side <NUM> of the bonding portion <NUM> is bonded to the circuit board assembly <NUM>, and the bonding portion <NUM> surrounds the photosensitive area <NUM> of the photosensitive chip <NUM>, so that the photosensitive area <NUM> of the photosensitive chip <NUM> is exposed to the light path <NUM> of the bonding portion <NUM>; and a plane on which the top bonding surface <NUM> of the bonding portion <NUM> is located is higher than a plane on which the photosensitive area <NUM> of the photosensitive chip <NUM> is located. Periphery of the light filter <NUM> is bonded to the top bonding surface <NUM> of the bonding portion <NUM>, so that the light filter <NUM> is kept in the photosensitive path of the photosensitive chip <NUM>. The optical lens unit <NUM> is kept in the photosensitive path of the photosensitive chip <NUM>. In the camera module <NUM> of the present invention, the bonding portion <NUM> is in a shape of a square ring, i.e., the bonding portion <NUM> has four sides <NUM>, wherein two adjacent sides <NUM> are connected end to end and perpendicular to each other, so that the photosensitive path <NUM> is formed between the bonding portions <NUM> formed by the four sides <NUM>. Each side <NUM> of the bonding portion <NUM> is respectively located outside the photosensitive area <NUM> of the photosensitive chip <NUM>.

Preferably, referring to <FIG>, the lower bonding side <NUM> of the bonding portion <NUM> is bonded to the circuit board <NUM> of the circuit board assembly <NUM>, the electronic component <NUM>, the guiding wire <NUM> and the non-photosensitive area <NUM> of the photosensitive chip <NUM>; the bonding portion <NUM> extends upward from the circuit board assembly <NUM> to a suitable height, and forms the top bonding surface <NUM> of the bonding portion <NUM>; and the top bonding surface <NUM> of the bonding portion <NUM> corresponds to the electronic components <NUM> arranged at a same height; in this way, a flatness of the top bonding surface <NUM> of the bonding portion <NUM> may be ensured by the electronic components <NUM> arranged at the same height, thereby ensuring a flatness between the light filter <NUM> and the photosensitive area <NUM> of the photosensitive chip <NUM>.

Optionally, referring to <FIG>, the top bonding surface <NUM> of the bonding portion <NUM> may also correspond to the non-photosensitive area <NUM> of the photosensitive chip <NUM>; in this way, the flatness of the top bonding surface <NUM> of the bonding portion <NUM> may be ensured by the non-photosensitive area <NUM> of the photosensitive chip <NUM>, thereby ensuring the flatness between the light filter <NUM> and the photosensitive area <NUM> of the photosensitive chip <NUM>. Further referring to <FIG>, a height of the top bonding surface <NUM> of the bonding portion <NUM> may be lower than the highest position of the bonding portion <NUM>, for example, the height of the top bonding surface <NUM> of the bonding portion <NUM> may be lower than the height of the electronic component <NUM>; in this way, in conjunction with the improvement in the optical design of the camera module <NUM>, the back focus of the camera module <NUM> may be reduced, thereby further reducing the height size of the camera module <NUM>. In addition, the manner in which the light filter <NUM> of the camera module <NUM> according to the present invention is further closer to the photosensitive chip <NUM> allows the optical lens unit <NUM> to have the possibility of being adjusted toward the direction of the photosensitive chip <NUM>, thereby facilitating to reduce the height size of the camera module <NUM>.

Further referring to <FIG>, in the camera module <NUM> according to the present invention, the types of the electronic components <NUM> may be, but are not limited to, a resistor, a capacitor, a controller or the like. Generally, different types of electronic components <NUM> have different height sizes. Therefore, in order to ensure that at least three of the electronic components <NUM> may be arranged at the same height, when these electronic components <NUM> are conductively connected to the circuit board <NUM>, the electronic components <NUM> with larger height size may be half embedded in the circuit board <NUM>, and the electronic components <NUM> with smaller height size are mounted on the surface of the circuit board <NUM>, so that these electronic components <NUM> are arranged at the same height; alternatively, when these electronic components <NUM> are conductively connected to the circuit board <NUM>, the electronic components <NUM> with larger height size may be mounted on the surface of the circuit board <NUM>, and the height of the electronic components <NUM> with smaller height size may be adjusted through an additional structure, so that these electronic components <NUM> are arranged at the same height.

It is worth mentioning that, when the height of the electronic component <NUM> with a smaller height size is adjusted by the additional structure, the additional structure may be arranged between the electronic component <NUM> and the circuit board <NUM>, or may also be arranged on the top of the electronic component <NUM>.

A distance size (parameter H) between the plane on which the top bonding surface <NUM> of the bonding portion <NUM> is located and the plane on which the photosensitive area <NUM> of the photosensitive chip <NUM> is located is greater than or equal to <NUM>. 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 module <NUM>.

In the present invention, the circuit board assembly <NUM>, the bonding portion <NUM>, and the light filter <NUM> form a photosensitive assembly, i.e., the camera module <NUM> includes the photosensitive assembly and the optical lens unit <NUM> which is kept in the photosensitive path of the photosensitive chip <NUM> of the photosensitive assembly, wherein the light entering the inside of the camera module <NUM> from the optical lens unit <NUM> may be received by the photosensitive chip <NUM> and photo-electrically converted.

Further referring to <FIG>, the camera module <NUM> further includes a lens holder <NUM> and a lens bearing portion <NUM> mounted on the lens holder <NUM>. The lens holder <NUM> has a lower surface <NUM>, an upper surface <NUM> corresponding to the lower surface <NUM>, and an inner surface <NUM> extending from the upper surface <NUM> to the lower surface <NUM>. The lower surface <NUM> of the lens holder <NUM> is mounted on the circuit board <NUM>, and the inner surface <NUM> of the lens holder <NUM> is bonded to the bonding portion <NUM>. The optical lens unit <NUM> is arranged on the lens bearing portion <NUM>, and the lens bearing portion <NUM> is mounted on the upper surface <NUM> of the lens holder <NUM>, so that the optical lens unit <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the lens holder <NUM> and the lens bearing portion <NUM>.

Optionally, in an example of the camera module <NUM>, the lens bearing portion <NUM> and the lens holder <NUM> may be an integrated structure. In another example of the camera module <NUM>, the camera module <NUM> may not be configured with the lens bearing portion <NUM>, in this case, the camera module <NUM> keeps the optical lens unit <NUM> in the photosensitive path of the photosensitive chip <NUM> by directly mounting the optical lens unit <NUM> on the lens holder <NUM>.

Referring to <FIG>, a set of the electronic components <NUM> are mounted on the circuit board <NUM>. The type of the electronic component <NUM> is not limited in the camera module <NUM> according to the present invention. For example, the electronic component <NUM> may be, but not limited to, a resistor, a capacitor, a controller, or the like.

Referring to <FIG>, a glue material <NUM> is applied to the circuit board assembly <NUM> so that the glue material <NUM> covers the electronic components <NUM>. Preferably, the glue material <NUM> applied to the circuit board assembly <NUM> further extends inward to and wraps the non-photosensitive area <NUM> of the photosensitive chip <NUM>, and extends outward to and wraps the circuit board <NUM>; and the glue material <NUM> covers the guiding wires <NUM>. More preferably, the glue material <NUM> applied to the circuit board assembly <NUM> has a ring shape, such as a square ring shape, which surrounds the photosensitive area <NUM> of the photosensitive chip <NUM>. In this preferred example of the camera module <NUM> shown in <FIG>, the glue material <NUM> applied to the circuit board assembly <NUM> covers the highest electronic component <NUM>.

It is worth mentioning that the glue material <NUM> applied to the circuit board assembly <NUM> is the glue material <NUM> with a relatively high viscosity, so as to avoid an undesirable phenomenon, i.e. prevent the glue material <NUM> from flowing after being applied to the circuit board assembly <NUM>, thereby avoiding contamination of the photosensitive area <NUM> of the photosensitive chip <NUM> during the process of packaging the camera module <NUM>.

Referring to <FIG>, the light filter <NUM> is mounted on the top of the glue material <NUM> applied to the circuit board assembly <NUM>, so that the light filter <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the glue material <NUM>. When the light filter <NUM> is mounted on the top of the glue material <NUM> applied to the circuit board assembly <NUM>, a force is applied to the light filter <NUM> in a direction where the photosensitive chip <NUM> is located, so that a flat surface is formed on the top of the glue material <NUM> applied to the circuit board assembly <NUM>, and the light filter <NUM> and the photosensitive area <NUM> of the photosensitive chip <NUM> are kept flat. Since the glue material <NUM> applied to the circuit board assembly <NUM> is the glue material <NUM> with a relatively high viscosity, after the light filter <NUM> is mounted on the top of the glue material <NUM> applied to the circuit board assembly <NUM> and the external force applied to the light filter <NUM> is removed, the relative positions of the light filter <NUM> and the photosensitive chip <NUM> will not change.

Optionally, in other examples of the camera module <NUM> of the present invention, the glue material <NUM> may be applied along a extending direction of the electronic components <NUM>, for example, if the electronic components <NUM> of the camera module <NUM> are in three rows; at this time, the glue material <NUM> is not applied into a state of surrounding the non-photosensitive area <NUM> of the photosensitive chip <NUM>, i.e., the glue material <NUM> is also not applied on a side of the photosensitive chip <NUM> where the electronic components <NUM> are not arranged. After the photosensitive chip <NUM> is mounted on the top of the glue material <NUM>, a gap will be formed between the light filter <NUM> and the circuit board assembly <NUM>, and then the gap formed between the light filter <NUM> and the circuit board assembly <NUM> may be sealed by replenishing glue or the like.

Referring to <FIG>, the lens holder <NUM> is mounted on the circuit board <NUM> of the circuit board assembly <NUM>. In this preferred example of the camera module <NUM> according to the present invention, the lower surface <NUM> of the lens holder <NUM> is mounted on the circuit board <NUM> by the glue material <NUM>, and the inner surface <NUM> of the lens holder <NUM> is attached to the glue material <NUM>.

After the lens holder <NUM> is mounted on the circuit board <NUM>, the glue material <NUM> applied to the circuit board assembly <NUM> is cured, so that the bonding portion <NUM> is formed by the glue material <NUM> applied to the circuit board assembly <NUM>, and the light filter <NUM> is kept in the photosensitive path of on the photosensitive chip <NUM> by the bonding portion <NUM>; wherein a side portion of the glue material <NUM> bonded to the circuit board assembly <NUM> forms the lower bonding side <NUM> of the bonding portion <NUM>, and a side portion of the glue material <NUM> bonded to the light filter <NUM> forms the top bonding surface <NUM>; wherein the lower surface <NUM> of the lens holder <NUM> is attached to the circuit board <NUM> by the glue material <NUM>, and the inner surface <NUM> of the lens holder <NUM> is bonded to the bonding portion <NUM>.

It is worth mentioning that in the camera module <NUM> according to the present invention, the way of curing the glue material <NUM> applied to the circuit board assembly <NUM> is not limited and it is selected on the basis of the type of the glue material <NUM>. For example, the glue material <NUM> applied to the circuit board assembly <NUM> may be cured by heating or ultraviolet light irradiation.

In the camera module <NUM> according to the present invention, the top bonding surface <NUM> of the bonding portion <NUM> corresponds to the electronic components <NUM> arranged at the same height, so that a flatness of the top bonding surface <NUM> of the bonding portion <NUM> is ensured by the electronic components <NUM> arranged at the same height, thereby ensuring a flatness of the light filter <NUM> and the photosensitive area <NUM> of the photosensitive chip <NUM>.

<FIG> shows a modified implementation of the camera module <NUM>. The difference from the camera module <NUM> shown in <FIG> is that: in this specific example of the camera module <NUM> shown in <FIG>, the camera module <NUM> is not provided with the lens bearing portion <NUM>, and the optical lens unit <NUM> is directly mounted on the lens holder <NUM>, so that the optical lens unit <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the lens holder <NUM>. In the packaging process of the camera module <NUM> shown in <FIG>, firstly the optical lens unit <NUM> is mounted on the lens holder <NUM>, and then the lens holder <NUM> is mounted on the circuit board <NUM> of the circuit board assembly <NUM>, finally the glue material <NUM> applied to the circuit board assembly <NUM> is cured, so that the bonding portion <NUM> is formed by the glue material <NUM> applied to the circuit board assembly <NUM>.

<FIG> shows a modified implementation of the camera module <NUM>. The difference from the camera module <NUM> shown in <FIG> is that: in this specific example of the camera module <NUM> shown in <FIG>, the glue material <NUM> is only applied to the circuit board <NUM> of the circuit board assembly <NUM>, so that after the glue material <NUM> is cured, the lower bonding side <NUM> of the bonding portion <NUM> is only bonded to the circuit board <NUM> of the circuit board assembly <NUM>.

<FIG> shows a modified implementation of the camera module <NUM>. The difference from the camera module <NUM> shown in <FIG> is that: in this specific example of the camera module <NUM> shown in <FIG>, the glue material <NUM> is only applied to the non-photosensitive area <NUM> of the photosensitive chip <NUM> of the circuit board assembly <NUM>, so that after the glue material <NUM> is cured, the lower bonding side <NUM> of the portion <NUM> is only bonded to the non-photosensitive area <NUM> of the photosensitive chip <NUM> of the circuit board assembly <NUM>. In this specific example of the camera module <NUM> shown in <FIG>, the top bonding surface <NUM> of the bonding portion <NUM> corresponds to the non-photosensitive area <NUM> of the photosensitive chip <NUM>, so that the flatness of the top bonding surface <NUM> of the bonding portion <NUM> is ensured by the non-photosensitive area <NUM> of the photosensitive chip <NUM>, thereby ensuring the flatness of the light filter <NUM> and the photosensitive area <NUM> of the photosensitive chip <NUM>.

<FIG> shows a modified implementation of the camera module <NUM>. The difference from the camera module <NUM> shown in <FIG> is that: in this specific example of the camera module <NUM> shown in <FIG>, the lower surface <NUM> of the lens holder <NUM> is mounted on the circuit board <NUM>, and the lens bearing portion <NUM> is mounted on the upper surface <NUM> of the lens holder <NUM>, so that the optical lens unit <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the lens holder <NUM> and the lens bearing portion <NUM>. In the packaging process of the camera module <NUM> shown in <FIG>, firstly the glue material <NUM> applied to the circuit board assembly <NUM> is cured, so as to form the bonding portion <NUM> by the glue material <NUM> applied to the circuit board assembly <NUM>, and then the lower surface <NUM> of the lens holder <NUM> is mounted on the circuit board <NUM>, finally the lens bearing portion <NUM> is mounted on the upper surface <NUM> of the lens holder <NUM>, so that the optical lens unit <NUM> is kept in the photosensitive path of the photosensitive chip <NUM> by the lens bearing portion <NUM>.

<FIG> shows a modified implementation of the camera module <NUM>. The difference from the camera module <NUM> shown in <FIG> is that: the lens holder <NUM> further has at least one notch <NUM> extending from the lower surface <NUM> to a direction of the upper surface <NUM>, wherein after the lens holder <NUM> is mounted on the circuit board <NUM>, a part of the glue material <NUM> applied to the circuit board assembly <NUM> is accommodated in the notch <NUM> of the lens holder <NUM>. In this way, when the glue material <NUM> applied to the circuit board assembly <NUM> is cured, the gap <NUM> of the lens holder <NUM> allows the glue material <NUM> to overflow from the inside of the lens holder <NUM> to the outside, thereby preventing the glue material <NUM> from expanding inward and contaminating the photosensitive area <NUM> of the photosensitive chip <NUM> or blocking the photosensitive path of the photosensitive chip <NUM>. After the glue material <NUM> applied to the circuit board assembly <NUM> is cured to form the bonding portion <NUM>, a part of the bonding portion <NUM> is accommodated in the notch <NUM> of the lens holder <NUM>. That is to say, in this specific example of the camera module <NUM> shown in <FIG>, the notch <NUM> of the lens holder <NUM> forms an opening for overflowing glue.

<FIG> shows a modified implementation of the camera module <NUM>. The difference from the camera module <NUM> shown in <FIG> is that: in this specific example of the camera module <NUM> shown in <FIG>, the inner surface <NUM> of the side portion of the lens holder <NUM> provided with the notch <NUM> is not mounted on the glue material <NUM> applied to the circuit board assembly <NUM>, and a gap is reserved between the inner surface <NUM> of the lens holder <NUM> and the glue material <NUM> applied to the circuit board assembly <NUM>. In this way, when the glue material <NUM> applied to the circuit board assembly <NUM> is cured, the gap <NUM> of the lens holder <NUM> allows the air held between the lens holder <NUM> and the glue material <NUM> applied to the circuit board assembly <NUM> to escape, so that the glue material <NUM> applied to the circuit board assembly <NUM> is allowed to expand in a direction of the circuit board assembly <NUM> of the lens holder <NUM>, thereby preventing the glue material <NUM> from expanding inward and contaminating the photosensitive area <NUM> of the photosensitive chip <NUM> or blocking the photosensitive path of the photosensitive chip <NUM>. After the glue material <NUM> applied to the circuit board assembly <NUM> is cured to form the bonding portion <NUM>, the gap <NUM> of the lens holder <NUM> is sealed by the glue material <NUM> or other materials.

<FIG> shows a modified implementation of the camera module <NUM>. The difference from the camera module <NUM> shown in <FIG> is that: in the camera module <NUM> shown in <FIG>, the lens holder <NUM> is integrally formed on the circuit board <NUM> and the bonding portion <NUM>. Particularly, after the glue material <NUM> applied to the circuit board assembly <NUM> is cured to form the bonding portion <NUM>, the lens holder <NUM> is formed by a molding process, so that the lower surface <NUM> of the lens holder <NUM> is integrally bonded to the circuit board <NUM>, and the inner surface <NUM> of the lens holder <NUM> is integrally bonded to the bonding portion <NUM>, thereby manufacturing the camera module <NUM> shown in <FIG>.

According to another aspect of the present invention, the present invention further provides a manufacturing method of a camera module <NUM>, wherein the manufacturing method includes the following steps:.

In a preferred example of the manufacturing method of the present invention, the step (a) further includes the following steps:.

Preferably, in the step (a. <NUM>), the glue material <NUM> applied to the circuit board assembly <NUM> surrounds the photosensitive area <NUM> of the photosensitive chip <NUM>, so that after the light filter <NUM> is mounted on the top of the glue material <NUM>, a sealed space is formed between the light filter <NUM>, the glue material <NUM> and the photosensitive chip <NUM>, and the photosensitive area <NUM> of the photosensitive chip <NUM> is kept in the sealed space. In this way, during the process of packaging the camera module <NUM>, it is possible to prevent dust and other contaminants from falling into the photosensitive area <NUM> of the photosensitive chip <NUM> to cause undesirable phenomenon of stain defects. Optionally, in the step (a. <NUM>), the glue material <NUM> is only applied along an extending direction of the electronic components <NUM> of the circuit board assembly <NUM>, and after the light filter <NUM> is mounted on the top of the glue material <NUM>, a gap formed between the light filter <NUM> and the circuit board assembly <NUM> is sealed. For example, the gap formed between the light filter <NUM> and the circuit board assembly <NUM> may be sealed with the glue material <NUM> by replenishing glue.

In the step (a. <NUM>), a pressure is applied to the light filter <NUM> in a direction of the photosensitive chip <NUM>, so that the light filter <NUM> is mounted on the top of the glue material <NUM>. In this way, the light filter <NUM> forms a flat surface on the top of the glue material <NUM>, and at this time, a flatness between the light filter <NUM> and the photosensitive area <NUM> of the photosensitive chip <NUM> may be ensured by the glue material <NUM>, so that after the glue material <NUM> is cured to form the bonding portion <NUM>, the flatness between the light filter <NUM> and the photosensitive area <NUM> of the photosensitive chip <NUM> may be ensured by the bonding portion <NUM>.

In a preferred example of the manufacturing method of the present invention, before the step (a. <NUM>), the step (a) further includes the step of: mounting the lens holder <NUM> on the circuit board <NUM> of the circuit board assembly <NUM>, so that in the step (a. <NUM>), the lower surface <NUM> of the lens holder <NUM> is bonded to the circuit board <NUM>, and the inner surface <NUM> of the lens holder <NUM> is bonded to the bonding portion <NUM>. In this way, the packaging relationship between the lens holder <NUM>, the bonding portion <NUM>, and the circuit board assembly <NUM> may be more reliable.

Preferably, the lens holder <NUM> is provided with the notch <NUM>, so that during the process of curing the glue material <NUM>, the glue material <NUM> is allowed to overflow from the notch <NUM> of the lens holder <NUM>, thereby avoiding the undesirable phenomenon of contaminating the photosensitive area <NUM> of the photosensitive chip <NUM> or blocking the photosensitive path of the photosensitive chip <NUM> by the expansion of the glue material <NUM> in a direction of the photosensitive area <NUM> of the photosensitive chip <NUM>. Optionally, when the lens holder <NUM> is mounted on the circuit board <NUM> of the circuit board assembly <NUM>, the inner surface <NUM> of the side portion of the lens holder <NUM> provided with the notch <NUM> is not attached to the glue material <NUM>, so that a gap is formed between the glue material <NUM> and the inner surface <NUM> of the lens holder <NUM>, and during the process of curing the glue material <NUM>, the air held between the glue material <NUM> and the inner surface <NUM> of the lens holder <NUM> is allowed to overflows from the notch <NUM> of the lens holder <NUM>, thereby guiding the glue material <NUM> to expand in a direction of the inner surface <NUM> of the lens holder <NUM>. In this way, it is possible to avoid the undesirable phenomenon of contaminating the photosensitive area <NUM> of the photosensitive chip <NUM> or blocking the photosensitive path of the photosensitive chip <NUM> by the expansion of the glue material <NUM> in a direction of the photosensitive area <NUM> of the photosensitive chip <NUM>.

In another preferred example of the manufacturing method of the present invention, the step (a) further includes the following steps:.

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.

Claim 1:
A photosensitive assembly, comprising:
a light filter (<NUM>);
a circuit board assembly (<NUM>), wherein the circuit board assembly includes a circuit board (<NUM>) and a photosensitive chip (<NUM>) conductively connected to the circuit board; and
a bonding portion (<NUM>), wherein the bonding portion has a lower bonding side (<NUM>), a top bonding surface (<NUM>), and a light path (<NUM>), wherein the lower bonding side (<NUM>) of the bonding portion is bonded to the circuit board assembly (<NUM>), and the bonding portion (<NUM>) surrounds a photosensitive area (<NUM>) of the photosensitive chip (<NUM>), 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 (<NUM>) is bonded to the top bonding surface (<NUM>) of the bonding portion (<NUM>), so that the light filter is kept in the photosensitive path of the photosensitive chip by the bonding portion;
characterised in that
the circuit board assembly (<NUM>) further includes a set of electronic components (<NUM>) disposed on the circuit board (<NUM>), and a plane on which the top bonding surface (<NUM>) of the bonding portion (<NUM>) is located is lower than a plane on which a top surface of the tallest electronic component (<NUM>) is located.