Patent Description:
In a conventional compact camera module, an image sensor is usually electrically connected to a circuit board by using a wire. However, as wires have poor stability, a problem, for example, wire sag or sway is very likely to occur, causing adjacent wires to come in contact with each other and then generate a short circuit, thereby affecting use reliability of the compact camera module.

This application provides a compact camera module and an electronic device, to prevent wires from generating sag or sway that causes adjacent wires to come in contact with each other and then generate a short circuit, thereby improving reliability of the compact camera module.

According to a first aspect, this application provides a compact camera module that may be used in an electronic device. The compact camera module includes an image sensor, a circuit board, first wires, second wires, and an insulation adhesive part. The image sensor is disposed on the circuit board, the first wires connect the circuit board to the image sensor, the second wires connect the circuit board to the image sensor and are spaced from the first wires, lengths of the second wires are greater than lengths of the first wires, and the insulation adhesive part is in contact with a top surface of the circuit board and covers at least a part of each first wire and a part of each second wire that are close to the circuit board.

The insulation adhesive part may be formed after being cured in a manner of natural curing, ultraviolet curing, thermal curing or the like following a dispensing process.

In the compact camera module shown in this application, the insulation adhesive part covers at least the part of the first wire and the part of the second wire that are close to the circuit board, to protect and fix the first wires and the second wires, so that loop stability of the first wires and the second wires is improved, and the first wires and the second wires are prevented from having wire sway or sag caused by a touch of a person during assembly of the compact camera module, or are prevented from having wire sway or sag due to overstress from external pressure during use of the compact camera module. In this way, the first wires and the second wires are prevented from coming in contact with each other and generating a short circuit because of wire sway or sag.

In an implementation, there are a plurality of first wires and a plurality of second wires, and the plurality of first wires and the plurality of second wires are in alternately arranged in a direction parallel to the top surface of the circuit board.

In an implementation, in a Y-axis direction, the plurality of first wires and the plurality of second wires are in alternately arranged. The Y-axis direction is a width direction of the compact camera module.

It should be understood that that the plurality of first wires and the plurality of second wires are in alternately arranged means that the plurality of first wires and the plurality of second wires are not arranged simply one classification after another, but there are one or more second wires between two first wires, or there are one or more first wires between two second wires.

In an implementation, the insulation adhesive part is further in contact with a top surface of the image sensor and covers a part of each first wire and a part of each second wire that are close to the image sensor, to assist in fixing the first wires and the second wires and improve the loop stability of the first wires and the second wires.

In an implementation, the top surface of the image sensor includes a photosensitive area and a non-photosensitive area surrounding the photosensitive area, and the insulation adhesive part is outside the photosensitive area, to prevent the insulation adhesive part from affecting the photosensitive area on receiving light for imaging, thereby improving imaging quality of the compact camera module.

In the compact camera module shown in this implementation, a simple dispensing and curing device may be used, and the insulation adhesive part may be formed after a dispensing and curing process to protect the first wires and the second wires, without a need to use a high-precision plastic packaging mold for plastic packaging of the first wires and the second wires. This avoids a microcrack or even damage due to excessive stress on the image sensor if the image sensor is squeezed by the plastic packaging mold, and helps reduce production costs of the compact camera module and improve a yield rate.

In an implementation, the insulation adhesive part covers highest positions of the first wires and the second wires, to improve the loop stability of the first wires and the second wires.

The highest positions of the first wires and the second wires refer to positions of the first wires and the second wires that are farthest from the top surface of the circuit board.

In an implementation, the insulation adhesive part fully covers the first wires and the second wires, to fully protect and fix the first wires and the second wires and ensure the loop stability of the first wires and the second wires.

In an implementation, the image sensor is disposed on the top surface of the circuit board, or the circuit board is provided with a mounting groove, an opening of the mounting groove is on the top surface of the circuit board, and the image sensor is disposed on the mounting groove, and the insulation adhesive part is further in contact with a lateral surface of the image sensor.

In an implementation, first pads and second pads that are spaced from each other are disposed on the top surface of the image sensor, first gold fingers and second gold fingers that are spaced from each other are disposed on the top surface of the circuit board, the first gold fingers and the second gold fingers are exposed relative to the image sensor, the second gold fingers are on a side on which the first gold fingers face away from the image sensor, the first wires connect the first gold fingers to the first pads, the second wires connect the second gold fingers to the second pads, and the insulation adhesive part covers the first gold fingers and the second gold fingers.

In an implementation, the lengths of the first wires range from <NUM> to <NUM>,<NUM>, and the lengths of the second wires range from <NUM> to <NUM>,<NUM>.

That the lengths of the first wires range from <NUM> to <NUM>,<NUM> means that a length of each first wire may not only be any value between <NUM> and <NUM>,<NUM>, but may alternatively be the endpoint value <NUM> or <NUM>,<NUM>. Similarly, that the lengths of the second wires range from <NUM> to <NUM>,<NUM> means that a length of each second wire may not only be any value between <NUM> and <NUM>,<NUM>, but may alternatively be the endpoint value <NUM> or <NUM>,<NUM>.

In an implementation, a distance between each first wire and each second wire is greater than or equal to <NUM>.

In an implementation, the compact camera module further includes a filter holder, an optical filter, a lens holder, and a lens. The filter holder is disposed on a top side of the circuit board, the filter holder has an aperture corresponding to the image sensor, the optical filter is disposed on the filter holder and covers the aperture, the lens holder is disposed on a top side of the filter holder, and the lens is disposed on an inside of the lens holder, to gather light from outside the compact camera module. In this case, the lens can gather light from outside, and transmit the light gathered from outside to the image sensor through the optical filter, to form a corresponding image on the image sensor.

According to a second aspect, this application provides an electronic device, including a housing and any one of the foregoing compact camera modules, where the compact camera module is disposed inside the housing.

In this application, as the insulation adhesive part covers at least the part of the first wire and the part of the second wire that are close to the circuit board, to protect and fix the first wires and the second wires, the loop stability of the first wires and the second wires is improved, and the first wires and the second wires are prevented from having wire sway or sag caused by a touch of a person during assembly of the compact camera module, or are prevented from having wire sway or sag due to overstress from external pressure during use of the compact camera module, so that the first wires and the second wires are prevented from coming in contact with each other and generating a short circuit because of wire sway or sag. This can reduce a fault feedback ratio of the compact camera module and help extend service life of the electronic device.

To describe technical solutions in embodiments of this application or in the background more clearly, the following briefly describes the accompanying drawings for describing the embodiments of this application or the background.

The following describes embodiments of this application with reference to the accompanying drawings in the embodiments of this application.

Refer to <FIG> is a schematic diagram of a structure of an electronic device <NUM> according to an embodiment of this application.

The electronic device <NUM> may be an electronic product having a photographing function, for example, a mobile phone, a tablet computer, a laptop computer, a head unit, a point-of-sale terminal (point-of-sale terminal, POS machine for short), or a wearable device. The wearable device may be a smart band, a smart watch, augmented reality (augmented reality, AR) glasses, virtual reality (virtual reality, VR) glasses, or the like. In this embodiment of this application, an example in which the electronic device <NUM> is a mobile phone is used for description.

For ease of description, it is specified that a width direction of the electronic device <NUM> is an X-axis direction, a length direction of the electronic device <NUM> is a Y-axis direction, and a thickness direction of the electronic device <NUM> is a Z-axis direction, where the X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other.

In this embodiment, the electronic device <NUM> includes a housing <NUM>, a display module <NUM>, a compact camera module <NUM>, and an image processor <NUM>. The housing <NUM> includes a frame <NUM> and a rear cover <NUM>, and the rear cover <NUM> is fixed on one side of the frame <NUM>. The frame <NUM> and the rear cover <NUM> may be fixed to each other by assembly, or may be an integrally formed structure.

The display module <NUM> is disposed in the housing <NUM>, and is enclosed by the housing <NUM>, to form an interior of the electronic device <NUM>. Specifically, the display module <NUM> is fixed on a side, of the frame <NUM>, that faces away from the rear cover <NUM>. In other words, the display module <NUM> and the rear cover <NUM> are fixed on two opposite sides of the frame <NUM>. The display module <NUM> is provided with a light-transmitting area <NUM>, and light outside the electronic device <NUM> may enter the electronic device <NUM> through the light-transmitting area <NUM>.

The compact camera module <NUM> and the image processor <NUM> are disposed inside the housing <NUM>. An interior of the housing <NUM> is the interior of the electronic device <NUM>. The compact camera module <NUM> can gather light from outside the electronic device <NUM> through the light-transmitting area <NUM>, and form corresponding image data. The image processor <NUM> is electrically connected to the compact camera module <NUM>, and the image processor <NUM> is configured to obtain the image data from the compact camera module <NUM> and process the image data. The image data processed by the image processor <NUM> may be displayed by the display module <NUM>, and may further be stored in a memory of the electronic device <NUM>, or may be stored in the cloud by the electronic device <NUM>.

In the electronic device <NUM> shown in this embodiment, the compact camera module <NUM> is on a side of the electronic device <NUM> that is close to the display module <NUM>, and is used as a front-facing compact camera module of the electronic device <NUM>. It should be noted that, in another embodiment, the compact camera module <NUM> may alternatively be on a side of the electronic device <NUM> that faces away from the display module <NUM>, and is used as a rear-facing compact camera module of the electronic device <NUM>. In this case, a photographing opening is provided on the rear cover <NUM>, and the compact camera module <NUM> gathers light from outside the electronic device <NUM> through the photographing opening on the rear cover <NUM>. In other words, the compact camera module <NUM> may be used as the front-facing compact camera module of the electronic device <NUM>, or may be used as the rear-facing compact camera module of the electronic device <NUM>. Alternatively, the electronic device <NUM> may include a plurality of (two or more) compact camera modules <NUM>. At least one of the compact camera modules <NUM> is used as the front-facing compact camera module of the electronic device <NUM>, and at least one of the compact camera modules <NUM> is used as the rear-facing compact camera module of the electronic device <NUM>.

Refer to <FIG> and <FIG>. <FIG> is a schematic diagram of a structure of the compact camera module <NUM> in the electronic device <NUM> shown in <FIG>. <FIG> is a schematic diagram of a partial decomposition structure of the compact camera module <NUM> shown in <FIG> according to an embodiment. A width direction of the compact camera module <NUM> is an X-axis direction, a length direction of the compact camera module <NUM> is a Y-axis direction, and a height direction of the compact camera module <NUM> is a Z-axis direction.

In an embodiment, the compact camera module <NUM> includes a circuit board <NUM>, an image sensor <NUM>, a filter holder <NUM>, an optical filter <NUM>, a lens holder <NUM>, and a lens <NUM>. The circuit board <NUM> is electrically connected to the image processor <NUM>, so that the compact camera module <NUM> is electrically connected to the image processor <NUM>. The circuit board <NUM> includes a top surface <NUM> and a bottom surface <NUM> that are opposite to each other. Both the top surface <NUM> and the bottom surface <NUM> of the circuit board <NUM> are parallel to an X-Y plane (or may be almost parallel to the X-Y plane, that is, a slight deviation is allowed). In other words, both the top surface <NUM> and the bottom surface <NUM> of the circuit board <NUM> are perpendicular to the Z-axis direction (or may be almost perpendicular to the Z-axis direction, that is, a slight deviation is allowed). The circuit board <NUM> is provided with a mounting groove <NUM>, and an opening of the mounting groove <NUM> is on the top surface <NUM> of the circuit board <NUM>. Specifically, the opening of the mounting groove <NUM> is in a middle area of the top surface <NUM>, and the mounting groove <NUM> is cut into the bottom surface <NUM> from the top surface <NUM> of the circuit board <NUM>.

It should be noted that the terms of locality such as "top" and "bottom" in this application are descriptions with reference to orientations in <FIG>, and do not indicate or imply that a described apparatus or element must have a particular orientation or be configured and operated in a particular orientation, and therefore cannot be understood as a limitation on this application.

Also refer to <FIG> is a schematic cross-section diagram of a structure of the compact camera module <NUM> shown in <FIG> that is cut in a direction I-I. "Cutting in the direction I-I" means cutting along a line I-I and a plane on which there are arrows at the two ends of the line I-I. Descriptions of the accompanying drawings below shall be understood in the same way.

In this embodiment, the circuit board <NUM> includes a substrate 31a and a bottom layer 31b. A top surface of the bottom layer 31b is fixedly connected to a bottom surface of the substrate 31a. The top surface of the circuit board <NUM> is formed on a top surface of the substrate 31a, and a bottom surface of the circuit board <NUM> is formed on a bottom surface of the bottom layer 31b. The bottom layer 31b is configured to reinforce the substrate 31a, so that the circuit board <NUM> is strong enough in structure to better support other components and structures. For example, the bottom layer 31b may be made of a stainless steel, copper, steel, or ceramic material. In addition, the bottom layer 31b may be further configured to conduct heat, so that heat of the circuit board <NUM> and a component fixed to the circuit board <NUM> can be dissipated quickly, thereby improving reliability of the compact camera module.

For example, the circuit board <NUM> may further include an adhesive bonding layer 31c. The adhesive bonding layer 31c is between the bottom layer 31b and the substrate 31a. The top surface of the bottom layer 31b is bonded with the adhesive bonding layer 31c, the adhesive bonding layer 31c is bonded with the bottom surface of the substrate 31a, and the bottom layer 31b and the substrate 31a are fixed to each other by adhesive bonding. The adhesive bonding layer 31c may be a conductive adhesive or a non-conductive adhesive. In some other implementations, the bottom layer 31b may alternatively be fixed to the substrate 31a by welding. For example, the circuit board <NUM> may further include a solder layer. The solder layer is between the bottom layer 31b and the substrate 31a, and is configured to fixedly connect the bottom layer 31b and the substrate 31a.

The circuit board <NUM> may be a rigid-flex circuit board. As shown in <FIG>, the substrate 31a includes a first rigid board part 311a, a flexible board part 312a, and a second rigid board part 313a that are sequentially arranged. A board surface size of the first rigid board part 311a is greater than a board surface size of the second rigid board part 313a. The first rigid board part 311a and the second rigid board part 313a are rigid boards, the flexible board part 312a is a flexible board, and the flexible board gets bent more easily than the rigid board. The bottom layer 31b is fixed to the first rigid board part 311a, and a top surface of the first rigid board part 311a that is away from the bottom layer 31b is the top surface <NUM> of the circuit board <NUM> in the foregoing descriptions. The circuit board <NUM> may further include a stiffener fixed to the second rigid board part 313a. Alternatively, the substrate 31a is a flexible board, and the substrate 31a includes a first area, a second area, and a third area that are sequentially arranged. A size of the first area is greater than a size of the third area. The bottom layer 31b is fixed to the first area, and a top surface of the first area that is away from the bottom layer 31b is the top surface <NUM> of the circuit board <NUM> in the foregoing descriptions. The circuit board <NUM> may further include a stiffener fixed to the second area.

As shown in <FIG>, the substrate 31a has a through-hole (not marked in the figure), and the mounting groove <NUM> (as shown in <FIG>) includes the through-hole on the substrate 31a. The adhesive bonding layer 31c (or the solder layer) has a through-hole (not marked in the figure), and the through-hole in the adhesive bonding layer 31c is interconnected to the through-hole on the substrate 31a. In this embodiment of this application, that two spaces are "interconnected" means that the two spaces are connected and drilled through. The mounting groove <NUM> further includes the through-hole in the adhesive bonding layer 31c (or the solder layer). A groove bottom wall of the mounting groove <NUM> is formed with an area of the top surface of the bottom layer 31b that faces the through-hole on the substrate 31a. In this embodiment, manufacturing difficulty of the mounting groove <NUM> is low, helping improve manufacturing precision. In some other embodiments, the mounting groove <NUM> may further include a depression formed on the substrate 31a. In this case, the mounting groove includes the through-hole formed on the substrate 31a, the through-hole formed in the adhesive bonding layer 31c, and the depression formed in the bottom layer 31b.

The image sensor <NUM> is disposed on the circuit board <NUM>, and is electrically connected to the circuit board <NUM>. In this embodiment, the image sensor <NUM> is disposed in the mounting groove <NUM>. In other words, the image sensor <NUM> can be fixed to the circuit board <NUM> from a top side of the circuit board <NUM>. Specifically, the image sensor <NUM> is disposed on the groove bottom wall of the mounting groove <NUM>. The image sensor <NUM> is disposed in a middle area of the groove bottom wall of the mounting groove <NUM>, and is spaced from a groove side wall of the mounting groove <NUM>. For example, the image sensor <NUM> may be disposed on the groove bottom wall of the mounting groove <NUM> by adhesive bonding. For example, the compact camera module <NUM> may include a first adhesive bonding layer <NUM>, and the first adhesive bonding layer <NUM> bonds the image sensor <NUM> and the groove bottom wall of the mounting groove <NUM> together. The image sensor <NUM> may be a chip.

In this embodiment, a height of the image sensor <NUM> is less than a depth of the mounting groove <NUM> on the circuit board <NUM>. The height of the image sensor <NUM> is a dimension of the image sensor <NUM> of the compact camera module <NUM> in a height direction (that is, the Z-axis direction shown in the figure). In this case, the image sensor <NUM> is fully embedded into the circuit board <NUM>, and both the image sensor <NUM> and the circuit board <NUM> can use a thickness space of the compact camera module <NUM>, thereby helping reduce a height of the compact camera module <NUM>.

The filter holder <NUM> is disposed on a top side of the circuit board <NUM>. In this embodiment, the filter holder <NUM> is disposed on the top surface <NUM> of the circuit board <NUM>. Specifically, the filter holder <NUM> is disposed in an edge area of the top surface <NUM>, and covers the top of the image sensor <NUM>. For example, the filter holder <NUM> may be disposed on the top surface <NUM> of the circuit board <NUM> by adhesive bonding. For example, the compact camera module <NUM> may include a second adhesive bonding layer <NUM>, and the second adhesive bonding layer <NUM> bonds the filter holder <NUM> and the top surface <NUM> of the circuit board <NUM> together.

It should be noted that that the filter holder <NUM> is disposed on the top side of the circuit board <NUM> means that at least a large part of the filter holder <NUM> is on the top side of the circuit board <NUM>. In this embodiment, the filter holder <NUM> is cooperatively fixed to the top surface <NUM> of the circuit board <NUM>. In another embodiment, the filter holder <NUM> may alternatively be cooperatively fixed to a lateral surface (not marked in the figure) of the circuit board <NUM>, or the filter holder <NUM> may be cooperatively fixed to the top surface <NUM> and a lateral surface of the circuit board <NUM>.

The filter holder <NUM> includes a top surface <NUM> that faces away from the circuit board <NUM>. The filter holder <NUM> has an aperture <NUM>, and an opening of the aperture <NUM> is on the top surface <NUM> of the filter holder <NUM>. Specifically, the opening of the aperture <NUM> is in a middle area of the top surface <NUM>, and the aperture <NUM> is cut into the circuit board <NUM> from the top surface <NUM> of the filter holder <NUM> through the filter holder <NUM> in the Z-axis direction. The aperture <NUM> corresponds to the image sensor <NUM>. It should be noted that that the aperture <NUM> corresponds to the image sensor <NUM> means that a part or all of a projection of the aperture <NUM> on the circuit board <NUM> overlaps with the image sensor <NUM>, to ensure that the image sensor <NUM> can receive light that enters the filter holder <NUM> through the aperture <NUM>. "Correspond to" in the following descriptions is understood in the same way.

In addition, the aperture <NUM> is a sealed hole (that is, the aperture <NUM> has walls all around). A wall of the aperture <NUM> may be perpendicular to or tilted relative to the top surface <NUM> of the filter holder <NUM>. Specifically, the wall of the aperture <NUM> partially protrudes to form a support part <NUM>. The support part <NUM> is a continuous closed ring. In another embodiment, the support part <NUM> may alternatively be a non-continuous ring. It should be understood that a shape of the support part <NUM> is not limited to a square ring shown in <FIG>, and may alternatively be a circular ring. This is not specifically limited in this application.

In some embodiments, the filter holder <NUM> may further have a positioning marker (not shown in the figure). Specifically, the positioning marker is on the top surface <NUM> of the filter holder <NUM>, so that fast positioning of the lens holder <NUM> with the filter holder <NUM> can be implemented conveniently during assembly of the compact camera module <NUM>. This improves precision and efficiency of assembling the lens holder <NUM> and the filter holder <NUM>. For example, there may be four positioning markers, and the four positioning markers are disposed surrounding the aperture <NUM> and spaced from each other. It should be noted that in some other embodiments, the filter holder <NUM> may have no positioning marker, and positioning of the lens holder <NUM> with the filter holder <NUM> may be implemented in another manner. This is not specifically limited in this application.

The optical filter <NUM> is disposed on the filter holder <NUM> and covers the aperture <NUM>. The optical filter <NUM> is accommodated in the aperture <NUM>, and corresponds to the image sensor <NUM>. Light from outside is filtered through the optical filter <NUM> and then received by the image sensor <NUM>, and the image sensor <NUM> converts the light to perform imaging. Specifically, the optical filter <NUM> is disposed on a top surface (not marked in the figure) of the support part <NUM> in the aperture <NUM>. For example, the optical filter <NUM> may be fixed to the top surface of the support part <NUM> by adhesive bonding. For example, the compact camera module <NUM> may include a third adhesive bonding layer <NUM>, and the third adhesive bonding layer <NUM> bonds the optical filter <NUM> and the filter holder <NUM> together. The optical filter <NUM> includes but is not limited to an infrared cut-off filter or a full-transmission spectral filter.

It should be noted that that the optical filter <NUM> covers the aperture <NUM> means that the optical filter <NUM> covers a narrowest section of the aperture <NUM>, and light from outside can enter the filter holder <NUM> only through the optical filter <NUM>. In another embodiment, the optical filter <NUM> may alternatively be partially accommodated in the aperture <NUM>, or the optical filter <NUM> covers the opening of the aperture <NUM>.

The lens holder <NUM> is disposed on a top side of the filter holder <NUM>. Specifically, the lens holder <NUM> is fixed to the top surface <NUM> of the filter holder <NUM>. The lens holder <NUM> is fixed to an edge area of the top surface <NUM>. For example, the lens holder <NUM> and the filter holder <NUM> may be fixed to each other by adhesive bonding. For example, the compact camera module <NUM> may include a fourth adhesive bonding layer <NUM>, and the fourth adhesive bonding layer <NUM> bonds the lens holder <NUM> and the filter holder <NUM> together. Clearly, in another embodiment, the lens holder <NUM> and the filter holder <NUM> may be fixed to each other by welding. For example, the compact camera module <NUM> may include a solder layer, and the solder layer fixedly connects the lens holder <NUM> to the filter holder <NUM>.

The lens holder <NUM> includes a top surface <NUM> that faces away from the filter holder <NUM> and a bottom surface <NUM> that is opposite to the top surface <NUM>. The lens holder <NUM> includes a mounting groove <NUM>, and an opening of the mounting groove <NUM> is in a middle area of the top surface <NUM>. The mounting groove <NUM> extends from the top surface <NUM> of the lens holder <NUM> to the bottom surface <NUM>, and goes through the bottom surface <NUM> of the lens holder <NUM>. In other words, the mounting groove <NUM> goes through the lens holder <NUM> in a height direction of the lens holder <NUM>. Specifically, the mounting groove <NUM> squarely faces the aperture <NUM>. To be specific, the mounting groove <NUM> squarely faces the image sensor <NUM>. Light outside the compact camera module <NUM> may enter the filter holder <NUM> through the mounting groove <NUM> and the aperture <NUM>, and is received by the image sensor <NUM>.

The lens <NUM> is disposed on an inside of the lens holder <NUM>. Specifically, the lens <NUM> is disposed in the mounting groove <NUM> of the lens holder <NUM>. For example, the lens <NUM> and the lens holder <NUM> may be fixed to each other by adhesive bonding. For example, the compact camera module <NUM> may include a fifth adhesive bonding layer <NUM>, and the fifth adhesive bonding layer <NUM> bonds the lens <NUM> and the lens holder <NUM> together.

The lens <NUM> is configured to gather light from outside the compact camera module <NUM>. That is, the lens <NUM> can gather light from outside and project the light from outside into the image sensor <NUM> through the optical filter <NUM>, to form a corresponding image on the image sensor <NUM>. The lens <NUM> may include a lens cone and a lens set fixed inside the lens cone. For example, there may be a plurality of lenses in the lens set, for example, five lenses, six lenses, seven lenses, or eight lenses.

The lens holder <NUM> is a motor. For example, the motor may be an autofocus motor, and the auto-focus motor can drive the lens set to move in a direction parallel to an optical axis of the lens <NUM>. Alternatively, the motor may be an optical image stabilization motor, and the optical image stabilization motor can drive the lens set to move on a plane perpendicular to the optical axis of the lens <NUM>, or drive the lens set to flip to be tilted relative to the optical axis of the lens <NUM>. Alternatively, the motor may be an autofocus and optical image stabilization motor. For example, the motor may be a voice coil motor (voice coil motor, VCM), may be a shape memory alloy-based motor, or the like. A specific function and type of the motor are not strictly limited in this application. In some other embodiments, the lens holder <NUM> may alternatively be a mount structure. In this case, the compact camera module <NUM> is a fixed-focus module.

Refer to <FIG> and <FIG>. <FIG> is a schematic diagram of a partially assembled structure of the circuit board <NUM> and the image sensor <NUM> in the compact camera module <NUM> shown in <FIG>. <FIG> is a schematic cross-section diagram of the structure shown in <FIG> that is cut in a direction II-II.

First gold fingers <NUM> and second gold fingers <NUM> that are spaced from each other are disposed on the top surface <NUM> of the circuit board <NUM>. Specifically, the first gold fingers <NUM> and the second gold fingers <NUM> are electrically connected to the circuit board <NUM>, and are both exposed relative to the image sensor <NUM>. The second gold fingers <NUM> are on a side on which the first gold fingers <NUM> face away from the image sensor <NUM>. In other words, the second gold fingers <NUM> and the image sensor <NUM> are on two sides of the first gold fingers <NUM>.

It should be understood that the first gold fingers <NUM> and the second gold fingers <NUM> are not limited to be on the top surface <NUM> that protrudes from the circuit board <NUM> as shown in <FIG>, and may alternatively be embedded in the circuit board <NUM> and aligned with the top surface <NUM> of the circuit board <NUM>, or embedded in the circuit board <NUM> and depressed relative to the top surface <NUM> of the circuit board <NUM>, that is, embedded in the circuit board <NUM> and located between the top surface <NUM> and the bottom surface <NUM> of the circuit board <NUM>. This is not specifically limited in this application.

In this embodiment, there are a plurality of first gold fingers <NUM> and a plurality of second gold fingers <NUM>, and the plurality of first gold fingers <NUM> and the plurality of second gold fingers <NUM> are all arranged near the opening of the mounting groove <NUM>. Specifically, a part of first gold fingers <NUM> are arranged in the Y-axis direction and spaced from each other to form a first gold finger set, and a part of first gold fingers <NUM> are arranged in the Y-axis direction and spaced from each other to form a second gold finger set. The first gold finger set and the second gold finger set are arranged in the X-axis direction and spaced from each other on two opposite sides of the opening of the mounting groove <NUM>.

A part of second gold fingers <NUM> are arranged in the Y-axis direction and spaced from each other to form a third gold finger set, and a part of second gold fingers <NUM> are arranged in the Y-axis direction and spaced from each other to form a fourth gold finger set. The third gold finger set and the fourth gold finger are arranged in the X-axis direction and spaced from each other on the two opposite sides of the opening of the mounting groove <NUM>. Specifically, the third gold finger set and the first gold finger set are on a same side of the opening of the mounting groove <NUM>, and are on a side on which the first gold finger set faces away from the opening of the mounting groove <NUM>. To be specific, the third gold finger set and the opening of the mounting groove <NUM> are on two opposite sides of the first gold fingers <NUM>. The fourth gold finger set and the second gold finger set are on a same side of the opening of the mounting groove <NUM>, and are on a side on which the second gold finger set faces away from the opening of the mounting groove <NUM>. To be specific, the fourth gold finger set and the opening of the mounting groove <NUM> are on two opposite sides of the second gold finger set.

The image sensor <NUM> includes a top surface <NUM> facing a same direction as the top surface <NUM> of the circuit board <NUM>. The top surface <NUM> of the image sensor <NUM> includes a photosensitive area <NUM> and a non-photosensitive area <NUM> surrounding the photosensitive area <NUM>. Specifically, the photosensitive area <NUM> is in a middle area of the top surface <NUM> of the image sensor <NUM>, and is used to receive light filtered through the optical filter <NUM>. The non-photosensitive area <NUM> is in an edge area of the top surface <NUM> of the image sensor <NUM>, and is used for implementing an electrical connection between the image sensor <NUM> and the circuit board <NUM>.

First pads <NUM> and second pads <NUM> that are spaced from each other are disposed on the top surface <NUM> of the image sensor <NUM>. Specifically, the first pads <NUM> and the second pads <NUM> are electrically connected to the image sensor <NUM>, and are both disposed in the non-photosensitive area <NUM> of the top surface <NUM>. There are a plurality of first pads <NUM> and a plurality of second pads <NUM>. A part of the first pads <NUM> and a part of the second pads <NUM> are in alternately arranged in the Y-axis direction to form a first pad set, and a part of the first pads <NUM> and a part of the second pads <NUM> are in alternately arranged in the Y-axis direction to form a second pad set. The first pad set and the second pad set are spaced from each other and arranged in the X-axis direction in the non-photosensitive area <NUM> of the top surface <NUM>.

It should be understood that the first pads <NUM> and the second pads <NUM> are not limited to be on the top surface <NUM> that protrudes from the image sensor <NUM> as shown in <FIG>, and may alternatively be embedded in the image sensor <NUM> and aligned with the top surface <NUM> of the image sensor <NUM>, or embedded in the image sensor <NUM> and depressed relative to the top surface <NUM> of the image sensor <NUM>, that is, embedded in the image sensor <NUM> and located between the top surface <NUM> and the bottom surface (not marked in the figure) of the image sensor <NUM>. This is not specifically limited in this application.

In addition, a quantity of the first pads <NUM> matches a quantity of the first gold fingers <NUM>, and a quantity of the second pads <NUM> matches a quantity of the second gold fingers <NUM>. In this embodiment, the quantity of the first pads <NUM> is equal to the quantity of the first gold fingers <NUM>, and the quantity of the second pads <NUM> is equal to the quantity of the second gold fingers <NUM>. In some other embodiments, a quantity of the first pads <NUM> may be greater than or less than a quantity of the first gold fingers <NUM>, and/or a quantity of the second pads <NUM> may be greater than or less than a quantity of the second gold fingers <NUM>.

The compact camera module <NUM> further includes first wires <NUM> and second wires <NUM>. The first wires <NUM> connect the circuit board <NUM> and the image sensor <NUM>, and the second wires <NUM> connect the circuit board <NUM> and the image sensor <NUM> and are spaced from the first wires <NUM>. For example, the first wires <NUM> and the second wires <NUM> may be made of gold, copper, aluminum, or another material. The image sensor <NUM> is connected to the substrate 31a of the circuit board <NUM> through the first wires <NUM> and the second wires <NUM>, to be electrically connected to the circuit board <NUM>. Both the first wires <NUM> and the second wires <NUM> may be formed by a wire bonding (wire bonding, WB) process, and the wire bonding process may also be referred to as a pressure welding process, a bonding process, or a fine wire welding process.

In this embodiment, there are a plurality of first wires <NUM> and a plurality of second wires <NUM>. A quantity of the first wires <NUM> is equal to the quantity of the first pads <NUM> and the quantity of the first gold fingers <NUM>. Each of the first wires <NUM> connects one of the first gold fingers <NUM> and one of the first pads <NUM>. Specifically, each of the first wires <NUM> includes a first end <NUM>, a second end <NUM>, and a connection part <NUM>. The connection part <NUM> connects the first end <NUM> and the second end <NUM>. The first end <NUM> of each first wire <NUM> is fixedly connected to one of the first gold fingers <NUM>, and the second end <NUM> is fixedly connected to one of the second pads <NUM>. Lengths of the first wires <NUM> range from <NUM> to <NUM>,<NUM>, and heights (that is, dimensions in the Z-axis direction) of the first wires <NUM> range from <NUM> to <NUM>.

It should be noted that that the lengths of the first wires <NUM> range from <NUM> to <NUM>,<NUM> means that a length of each first wire <NUM> may not only be any value between <NUM> and <NUM>,<NUM>, but may alternatively be the endpoint value <NUM> or <NUM>,<NUM>. Similarly, that the heights of the first wires <NUM> range from <NUM> to <NUM> means that a height of each first wire <NUM> may not only be any value between <NUM> and <NUM>, but may alternatively be the endpoint value <NUM> or <NUM>.

A quantity of the second wires <NUM> is equal to the quantity of the second pads <NUM> and the quantity of the second gold fingers <NUM>. Each of the second wires <NUM> connects one of the second gold fingers <NUM> and one of the second pads <NUM>, and is spaced from an adjacent first wire <NUM>. Specifically, the plurality of second wires <NUM> and the plurality of first wires <NUM> are in alternately arranged in a direction parallel to the top surface <NUM> of the circuit board <NUM>. In the Y-axis direction, the plurality of second wires <NUM> and the plurality of first wires <NUM> are in alternately arranged. In this case, a distance w between each second wire <NUM> and each adjacent first wire <NUM> is greater than or equal to <NUM>, to avoid a short circuit due to contact between the second wires <NUM> and the first wires <NUM>.

It should be noted that that the plurality of first wires <NUM> and the plurality of second wires <NUM> are in alternately arranged means that the plurality of first wires <NUM> and the plurality of second wires <NUM> are not arranged simply one classification after another, but there are one or more second wires <NUM> between two first wires <NUM>, or there are one or more first wires <NUM> between two second wires <NUM>.

Specifically, each of the second wires <NUM> includes a first end <NUM>, a second end <NUM>, and a connection part <NUM>. The connection part <NUM> connects the first end <NUM> and the second end <NUM>. The first end <NUM> of each of the second wires <NUM> is fixedly connected to one of the second gold fingers <NUM>, and the second end <NUM> is fixedly connected to one of the second pads <NUM>. Lengths of the second wires <NUM> are greater than the lengths of the first wires <NUM>, and the lengths of the second wires <NUM> range from <NUM> to <NUM>,<NUM>. Heights of the second wires <NUM> are equal to the heights of the first wires <NUM>. In some other embodiments, the heights of the second wires <NUM> may alternatively be different from the heights of the first wires <NUM>. To be specific, the heights of the second wires <NUM> may be less than the heights of the first wires <NUM>, or the heights of the second wires <NUM> may be greater than the heights of the first wires <NUM>.

It should be noted that that the lengths of the second wires <NUM> range from <NUM> to <NUM>,<NUM> means that the lengths of the second wires <NUM> may not only be any value between <NUM> and <NUM>,<NUM>, but may alternatively be the endpoint value <NUM> or <NUM>,<NUM>.

In addition, the compact camera module <NUM> further includes insulation adhesive parts <NUM>, and the insulation adhesive parts <NUM> are in contact with the top surface <NUM> of the circuit board <NUM>. There are two insulation adhesive parts <NUM>, and the two insulation adhesive parts <NUM> are arranged in the X-axis direction and spaced from each other on two opposite sides of the image sensor <NUM>. For example, the insulation adhesive parts <NUM> may be formed after being cured in a manner of natural curing, ultraviolet curing, thermal curing or the like following a dispensing process. Specifically, the insulation adhesive parts <NUM> cover at least a part of each first wire <NUM> and a part of each second wire <NUM>. In this embodiment, the insulation adhesive parts <NUM> cover at least a part of each first wire <NUM> and a part of each second wire <NUM> that are close to the circuit board <NUM>. The insulation adhesive parts <NUM> cover the first end <NUM> of each first wire <NUM> and a part, of the connection part <NUM>, that is close to the first end <NUM>, to assist in fixing the first wires <NUM>, improve loop stability of the first wires <NUM>, and prevent the first wires <NUM> from generating wire sway due to a touch of a person during assembly (for example, an operation, inspection, or reworking procedure) of the compact camera module <NUM>, or generating wire sway because of deformation due to overstress from an external pressure during use, coming in contact with the second wires <NUM>, and generating a short circuit.

In addition, a maximum distance H between the insulation adhesive parts <NUM> and the top surface <NUM> of the circuit board <NUM> is greater than a maximum distance h between the first wires <NUM> and the top surface <NUM> of the circuit board <NUM>. In other words, the insulation adhesive parts <NUM> cover highest positions of the first wires <NUM>, so that the first wires <NUM> can be effectively prevented from sagging, and the loop stability of the first wires <NUM> is improved. The highest positions of the first wires <NUM> refer to positions of the first wires <NUM> that are farthest from the top surface <NUM> of the circuit board <NUM>.

The insulation adhesive parts <NUM> cover the first end <NUM> of each second wire <NUM> and a part, of the connection part <NUM>, that is close to the first end <NUM>, to assist in fixing the second wires <NUM>, and prevent the second wires <NUM> from generating a wire sway due to a touch of a person during assembly of the compact camera module <NUM> or overstress during use, coming in contact with the first wires <NUM>, and generating a short circuit, thereby reducing a fault feedback ratio (fault feedback ratio, FFR) of the compact camera module <NUM>. It can be understood that, because the heights of the second wires <NUM> are the same as the heights of the first wires <NUM>, the insulation adhesive parts <NUM> also cover highest positions of the second wires <NUM>, to prevent the second wires <NUM> from generating sag due to a touch of a person during assembly of the compact camera module <NUM> or overstress during use, coming in contact with the first gold fingers <NUM>, and generating a short circuit.

It should be noted that, in some other embodiments, the insulation adhesive parts <NUM> may not cover the highest positions of the first wires <NUM> and/or the second wires <NUM>. When the second wires <NUM> sags, the second wires <NUM> do not come in contact with the first gold fingers <NUM> because of separation of the insulation adhesive part <NUM>, and a short circuit does not occur. In this case, because the insulation adhesive parts <NUM> do not cover the highest points of the first wires <NUM> and/or the second wires <NUM>, an internal height of the filter holder <NUM> fixed above the circuit board <NUM> is reduced, thereby helping reduce the height of the compact camera module <NUM>, and achieving a compact design of the compact camera module <NUM>.

The insulation adhesive parts <NUM> are in contact with a lateral surface of the image sensor <NUM>, and cover the first gold fingers <NUM> and the second gold fingers <NUM>, to improve connection stability of the insulation adhesive parts <NUM> and the circuit board <NUM>, thereby improving an effect of fixing the first wires <NUM> and the second wires <NUM> to the insulation adhesive parts <NUM>. It should be understood that, in a dispensing process, a fluid adhesive flows within a specific area. Therefore, the insulation adhesive parts <NUM> cover a part of an area near the first gold fingers <NUM> and the second gold fingers <NUM>. As shown in <FIG>, the insulation adhesive parts <NUM> further cover a part of an area of the top surface <NUM> of the circuit board <NUM>, to improve connection stability of the insulation adhesive parts <NUM> and the circuit board <NUM>. In addition, a part of the insulation adhesive parts <NUM> is in the mounting groove <NUM>, and connects a side surface of the image sensor <NUM> and the groove side wall of the mounting groove <NUM>, to further improve connection stability of the insulation adhesive parts <NUM> and the circuit board <NUM>. It can be understood that a size of coverage of the insulation adhesive parts <NUM> over the top surface <NUM> of the circuit board <NUM> may be controlled by selection of adhesive viscosity, control of a dispensing path, using a curing parameter, or another process.

It should be noted that, in some other embodiments, a third gold finger may be further disposed on the top surface <NUM> of the circuit board <NUM>, a third pad may be further disposed on the top surface <NUM> of the image sensor <NUM>, and the compact camera module <NUM> may further include a third wire. The third wire connects the third gold finger and the third pad, and the insulation adhesive parts <NUM> may cover a part or all of the third wire. This is not specifically limited in this application.

Refer to <FIG> and <FIG>. <FIG> is a schematic diagram of a partially assembled structure of the circuit board <NUM> and the image sensor <NUM> in a compact camera module of a second electronic device according to an embodiment of this application. <FIG> is a schematic cross-section diagram of the structure shown in <FIG> that is cut in a direction III-III.

A difference between the electronic device shown in this embodiment and the electronic device shown in the foregoing embodiment lies in that the insulation adhesive parts <NUM> further contact the top surface <NUM> of the image sensor <NUM>, and cover a part of each first wire <NUM> and a part of each second wire <NUM> that are close to the image sensor <NUM>. Specifically, the insulation adhesive parts <NUM> fully cover the first wires <NUM> and the second wires <NUM>. The insulation adhesive parts <NUM> cover the first end <NUM>, the connection part <NUM>, and the second end <NUM> of each first wire <NUM>, and the first end <NUM>, the connection part <NUM>, and the second part <NUM> of each second wire <NUM>, to fix the first wires <NUM> and the second wires <NUM> and prevent the first and second wires from generating wire sway, coming in contact with each other, and generating a short circuit.

In this case, the insulation adhesive parts <NUM> further cover the first pads <NUM> and the second pads <NUM>, to improve connection stability of the insulation adhesive parts <NUM> and the image sensor <NUM> and improve an effect of fixing the first wires <NUM> and the second wires <NUM> to the insulation adhesive parts <NUM>. It should be understood that, in a dispensing process, a fluid adhesive flows within a specific area. Therefore, the insulation adhesive parts <NUM> further cover a part of an area near the first pads <NUM> and the second pads <NUM>. As shown in <FIG>, the insulation adhesive parts <NUM> further cover a part of an area of the top surface <NUM> of the image sensor <NUM>, to improve connection stability of the insulation adhesive parts <NUM> and the image sensor <NUM>. In this case, the insulation adhesive parts <NUM> cover a part of the non-photosensitive area <NUM> of the image sensor <NUM>. To be specific, the insulation adhesive parts <NUM> are outside the photosensitive area <NUM> of the image sensor <NUM>, that is, the insulation adhesive parts <NUM> do not cover the photosensitive area <NUM> of the image sensor <NUM>, to prevent the insulation adhesive parts <NUM> from affecting the photosensitive area <NUM> on receiving light for imaging.

In the electronic device <NUM> shown in this embodiment, a simple dispensing and curing device may be used, and the insulation adhesive parts <NUM> may be formed after a dispensing and curing process to protect the first wires <NUM> and the second wires <NUM>, without a need to use a high-precision plastic packaging mold for plastic packaging of the first wires <NUM> and the second wires <NUM>. This avoids a microcrack or even damage due to excessive stress on the image sensor <NUM> if the image sensor <NUM> is squeezed by the plastic packaging mold, and helps reduce production costs of the compact camera module <NUM> and improve a yield rate.

Refer to <FIG> and <FIG>. <FIG> is a schematic diagram of a partially assembled structure of the circuit board <NUM> and the image sensor <NUM> in a compact camera module of a third electronic device according to an embodiment of this application. <FIG> is a schematic cross-section diagram of the structure shown in <FIG> that is cut in a direction IV-IV.

A difference between the electronic device shown in this embodiment and the electronic device shown in the first embodiment described above lies in that the image sensor <NUM> is disposed on the top surface <NUM> of the circuit board <NUM>. Specifically, the image sensor <NUM> is disposed in a middle area of the top surface <NUM> of the circuit board <NUM>. For example, the image sensor <NUM> may be disposed on the top surface of the circuit board <NUM> by adhesive bonding. For example, the compact camera module <NUM> may include a first adhesive bonding layer <NUM>, and the first adhesive bonding layer <NUM> bonds the image sensor <NUM> and the circuit board <NUM> together.

In this embodiment, the insulation adhesive parts <NUM> cover a part of each first wire <NUM> and a part of each second wire <NUM>. Specifically, the insulation adhesive parts <NUM> cover the first end <NUM> of each first wire <NUM> and a part, of the connection part <NUM>, that is close to the first end <NUM>. A height H of each insulation adhesive part <NUM> in a positive direction of the Z-axis is less than a height h of each first wire <NUM> in a positive direction of the Z-axis. In other words, the insulation adhesive parts <NUM> do not cover the highest points of the first wires <NUM>.

The insulation adhesive parts <NUM> cover the first end <NUM> of each second wire <NUM> and a part, of the connection part <NUM>, that is close to the first end <NUM>. The insulation adhesive parts <NUM> do not cover the highest points of the second wires <NUM>. When the second wires <NUM> sags, the second wires <NUM> do not come in contact with the first gold fingers <NUM> because of separation of the insulation adhesive part <NUM>, and a short circuit does not occur.

Refer to <FIG> and <FIG>. <FIG> is a schematic diagram of a partially assembled structure of the circuit board <NUM> and the image sensor <NUM> in a compact camera module of a fourth electronic device according to an embodiment of this application. <FIG> is a schematic cross-section diagram of the structure shown in <FIG> that is cut in a direction V-V.

A difference between the electronic device shown in this embodiment and the electronic device shown in the third embodiment described above lies in that the insulation adhesive parts <NUM> cover the first wires <NUM> and the second wires <NUM>. Specifically, the insulation adhesive parts <NUM> cover the first end <NUM>, the connection part <NUM>, and the second end <NUM> of each first wire <NUM>, and the first end <NUM>, the connection part <NUM>, and the second part of each second wire <NUM>. To be specific, the insulation adhesive parts <NUM> fully cover the first wires <NUM> and the second wires <NUM>, to fix the first wires <NUM> and the second wires <NUM>, and avoid a short circuit when the wires come in contact with each other because of wire sway.

In addition, the insulation adhesive parts <NUM> further cover the first pads <NUM> and the second pads <NUM>, to improve connection stability of the insulation adhesive parts <NUM> and the image sensor <NUM> and improve an effect of fixing the first wires <NUM> and the second wires <NUM> to the insulation adhesive parts <NUM>. It should be understood that, in a dispensing process, a fluid adhesive flows within a specific area. Therefore, the insulation adhesive parts <NUM> further cover a part of an area near the first pads <NUM> and the second pads <NUM>. As shown in <FIG>, the insulation adhesive parts <NUM> further cover a part of an area of the top surface <NUM> of the image sensor <NUM>, to improve connection stability of the insulation adhesive parts <NUM> and the image sensor <NUM>. In this case, the insulation adhesive parts <NUM> cover a part of the non-photosensitive area of the image sensor <NUM>. To be specific, the insulation adhesive parts <NUM> do not cover the photosensitive area of the image sensor <NUM>, to prevent the insulation adhesive parts <NUM> from affecting the photosensitive area on receiving light for imaging.

Claim 1:
A compact camera module (<NUM>), comprising an image sensor (<NUM>), a circuit board (<NUM>), first wires (<NUM>), second wires (<NUM>), and an insulation adhesive part (<NUM>), wherein the image sensor (<NUM>) is disposed on the circuit board (<NUM>), the first wires (<NUM>) connect the circuit board (<NUM>) to the image sensor (<NUM>), the second wires (<NUM>) connect the circuit board (<NUM>) to the image sensor (<NUM>) and are spaced from the first wires (<NUM>), lengths of the second wires (<NUM>) are greater than lengths of the first wires (<NUM>), and the insulation adhesive part (<NUM>) covers at least a part of each first wire (<NUM>) and a part of each second wire (<NUM>) that are close to the circuit board (<NUM>),
characterized in that the insulation adhesive part (<NUM>) is in contact with a top surface (<NUM>) of the circuit board (<NUM>).