Packaging shell, packaging shell matrix, packaging structure and packaging method

Abstract

The invention relates to the technical field of optical sensors, in particular to a packaging shell, a packaging shell matrix, a packaging structure and a packaging method.The packaging shell is provided with a containing groove, the notch end of the containing groove is used for being connected to a substrate, and the middle of the containing groove is provided with a light barrier; the light barrier divides the containing groove into a first containing groove used for containing the light projection chip and a second containing groove used for containing the light receiving chip, a first vent hole is formed in the groove wall of the side, opposite to the light barrier, of the first containing groove, and a second vent hole is formed in the groove wall of the side, opposite to the light barrier, of the second containing groove. The first vent hole and the second vent hole are formed by the same injection mold mandrel, a first space is formed between the light barrier and the base plate, and the injection mold mandrel penetrates through the first space; the first space is also used for arranging an adhesive, so that the light barrier is bonded with the substrate; the pollution of the lens is avoided; and batch processing of packaging shells is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of optical sensors, and in particular to a packaging shell, a packaging shell matrix, a packaging structure and a packaging method. Background Art

[0002] Optical sensors such as ambient light sensors, spectral light sensors, proximity sensors, and time-of-flight sensors are widely used in consumer electronics, industrial automation, automotive electronics, and medical electronics. Optical sensors mainly include working parts such as a light-projecting chip and a light-receiving chip installed on a substrate, and a packaging shell connected to the substrate for encapsulating the above working parts. The packaging shell has two receiving grooves. When the packaging shell is connected to the substrate, the substrate closes the openings of the two receiving grooves, so that two receiving cavities are enclosed between the substrate and the packaging shell. The light-projecting chip and the light-receiving chip are respectively located in one of the two receiving cavities. The cavity walls of the two receiving cavities at the ends opposite to the substrate are provided with light-transmitting holes, and lenses are installed in the light-transmitting holes. If the two installation cavities are completely sealed, the temperature of the light-projecting chip and the light-receiving chip during operation will cause the gas in the receiving cavity to expand, causing the packaging structure to crack. Therefore, the packaging structure needs to be provided with an exhaust structure, and the exhaust structure is used to connect the two receiving cavities with the outside world.

[0003] In the existing packaging structure, an exhaust groove is usually set on one side of the light-transmitting hole, because it is easy to process the exhaust groove when the exhaust groove is set on one side of the light-transmitting hole. Specifically, the packaging shell is usually formed by injection molding. When the packaging shell is injection molded, a core shaft for forming the light-transmitting hole needs to be set in the mold, and a convex rib parallel to the core shaft is processed on the outside of the core shaft to form the exhaust groove. However, the exhaust groove is set at the light-transmitting hole, which easily causes the lens installed in the light-transmitting hole to be contaminated, and the lens cannot be kept clean for a long time. Summary of the invention

[0004] The technical problem to be solved by the present invention is: In order to solve the above technical problem, the purpose of the present invention is to provide a packaging shell, the packaging shell has a receiving groove, the notch end of the receiving groove is used to be connected to a substrate, the middle part of the receiving groove is provided with a light blocking plate, the light blocking plate divides the receiving groove into a first receiving groove and a second receiving groove, the first receiving groove and the second receiving groove are respectively used to accommodate a light projecting chip and a light receiving chip connected to the substrate;

[0005] A first vent hole is provided on the groove wall of the first accommodating groove on the side opposite to the light blocking plate, and a second vent hole is provided on the groove wall of the second accommodating groove on the side opposite to the light blocking plate; the packaging shell is formed by injection molding, the first vent hole and the second vent hole are both molded by the same injection mold core shaft, and the first vent hole and the second vent hole are arranged close to the substrate, and a first space is provided between the end of the light blocking plate close to the substrate and the substrate, and the first space is used for the injection mold core shaft to pass through; the first space is also used to set an adhesive to bond the light blocking plate to the substrate.

[0006] As a preferred solution, the apertures of the first ventilation hole and the second ventilation hole are coaxially arranged.

[0007] As a preferred solution, the first vent hole and the second vent hole have the same aperture.

[0008] As a preferred solution, the first space includes an avoidance groove arranged at one end of the light blocking plate close to the substrate, and the avoidance groove is used for the injection mold core shaft to pass through;

[0009] The distance between the central axis of the first ventilation hole and the second ventilation hole and the substrate is defined as a first distance, and the sum of the radius of the first ventilation hole and the first distance and the sum of the radius of the second ventilation hole and the first distance are both smaller than the distance between the bottom wall of the avoidance groove and the substrate.

[0010] As a preferred solution, the diameters of the first vent hole and the second vent hole are both greater than or equal to 0.1 mm and less than or equal to 0.2 mm.

[0011] As a preferred solution, the bottom of the first accommodating groove has a first lens mounting hole opposite to the light-projecting chip; the bottom of the second accommodating groove has a second lens mounting hole opposite to the light-receiving chip.

[0012] A packaging shell matrix comprises a plurality of the above-mentioned packaging shells, each of which is connected in sequence along the direction from the first vent hole to the second vent hole through a connecting section, and the first vent hole and the second vent hole of each packaging shell are molded by the same injection mold core shaft.

[0013] A packaging structure comprises the above-mentioned packaging shell, and also comprises a substrate connected to the notch end of the packaging shell, a light-projecting chip and a light-receiving chip fixed on the substrate; an adhesive layer is provided in the first space between a light-blocking plate and the substrate.

[0014] A packaging method comprises the following steps:

[0015] A plurality of optical units are connected on the base board along a first direction at intervals, each of the optical units comprising a light-projecting chip and a light-receiving chip arranged along the first direction at intervals;

[0016] Install lenses at each first lens mounting hole and second lens mounting hole of the package shell body to form the package shell body;

[0017] Filling adhesive in each first space of the package shell mother body, connecting the package shell mother body to the substrate mother board, and allowing each light-projecting chip and each light-receiving chip to enter each first receiving groove and each second receiving groove of the package shell mother body respectively, to form a package body mother body;

[0018] The package body matrix is ​​divided into a plurality of packages along each connecting section of the package shell matrix.

[0019] As a preferred solution, before installing the lenses at the first lens mounting holes and the second lens mounting holes of the packaging shell body, the method further comprises:

[0020] The package shell mother body is formed by an injection mold, wherein the injection mold comprises a mold body and a core shaft, wherein the core shaft passes from one side of the mold body to the other side of the mold body to form each first vent hole and a second vent hole.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The packaging shell of the present invention has a receiving groove, the groove end of the receiving groove is used to be connected to the substrate, and the middle part of the receiving groove is provided with a light blocking plate, the light blocking plate divides the receiving groove into a first receiving groove and a second receiving groove, the first receiving groove and the second receiving groove are respectively used to accommodate a light-projecting chip and a light-receiving chip connected to the substrate; a first air vent is provided on the groove wall on the side opposite to the light blocking plate, and a second air vent is provided on the groove wall on the side opposite to the light blocking plate; the packaging shell is formed by injection molding, and the first air vent and the second air vent are both molded by the same injection mold core shaft; a first space is provided between the end of the light blocking plate close to the substrate and the substrate, and the first space is used for the injection mold core shaft to pass through; the first space is also used to set an adhesive to bond the light blocking plate to the substrate; the first air vent and the second air vent are not set at the light-transmitting hole, thereby avoiding contamination of the lens; moreover, the first air vent and the second air vent can be molded by the same injection mold core shaft, which is convenient for batch processing of the packaging shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a first isometric view of the packaging shell of the present invention;

[0024] Figure 2 is a second isometric view of the packaging shell of the present invention;

[0025] Figure 3A top view of the packaging shell of the present invention;

[0026] Figure 4 for Figure 3 Middle AA section view;

[0027] Figure 5 It is a schematic diagram of the structure of the packaging shell mother body of the present invention;

[0028] Figure 6 It is a structural schematic diagram of an injection mold for molding a package shell mother body;

[0029] Figure 7 It is a structural schematic diagram of the packaging structure of the present invention;

[0030] Figure 8 A schematic diagram of the structure of mounting the lens on the packaging shell mother body;

[0031] Fig. 9 It is a schematic diagram of the structure of die bonding and wire bonding on the substrate motherboard;

[0032] Fig.10 It is a schematic diagram of the structure of the package body;

[0033] Fig.11 A schematic diagram of a structure for dividing a package matrix into multiple packages;

[0034] In the figure, 1. packaging shell, 11. light blocking plate, 111. avoidance groove, 12. first accommodating groove, 13. second accommodating groove, 14. first ventilation hole, 15. second ventilation hole, 16. first lens mounting hole, 17. second lens mounting hole, 2. substrate, 21. mounting seat, 3. light projecting chip, 4. light receiving chip, 5. connecting section, 61. injection mold core shaft, 62. upper mold, 63. lower mold, 7. adhesive layer, 8. lens. DETAILED DESCRIPTION

[0035] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and 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 cannot be understood as a limitation of the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0037] like Figures 1 to 4 As shown, a preferred embodiment of the packaging shell of the present invention, the packaging shell 1 has a receiving groove, the groove end of the receiving groove is used to be connected to the substrate 2, the middle part of the receiving groove is provided with a light blocking plate 11, the light blocking plate 11 divides the receiving groove into a first receiving groove 12 and a second receiving groove 13, the first receiving groove 12 and the second receiving groove 13 are respectively used to accommodate the light-projecting chip 3 and the light-receiving chip 4 connected to the substrate 2; the groove wall of the first receiving groove 12 on the side opposite to the light blocking plate 11 is provided with a first vent hole 14, and the groove wall of the second receiving groove 13 on the side opposite to the light blocking plate 11 is provided with a second vent hole 15; the packaging shell 1 is formed by injection molding, the first vent hole 14 and the second vent hole 15 are both formed by the same injection mold core shaft 61, and the first vent hole 14 and the second vent hole 15 are both arranged close to the substrate 2; a first space is provided between the end of the light blocking plate 11 close to the substrate 2 and the substrate 2, and the first space is used for the injection mold core shaft 61 to pass through; the first space is also used to set an adhesive to bond the light blocking plate 11 to the substrate 2.

[0038] Specifically, when the packaging shell 1 is injection molded, the first space can allow the injection mold core shaft 61 to pass through, so that the injection mold core shaft 61 can simultaneously mold the first vent hole 14 and the second vent hole 15. When the packaging shell 1 is packaged on the substrate 2, an adhesive is applied at the first space. The adhesive can close the first space, thereby preventing light in the first receiving groove 12 from entering the second receiving groove 13. In addition, the provision of the adhesive also improves the connection strength between the packaging shell 1 and the substrate 2.

[0039] In order to facilitate the smooth extraction of the injection mold core shaft 61 from the molded packaging shell 1, in this embodiment, the first vent hole 14 and the second vent hole 15 are coaxially arranged. Furthermore, the first vent hole 14 and the second vent hole 15 have the same diameter.

[0040] In this embodiment, the first space includes an avoidance groove 111 arranged at one end of the light shielding plate 11 close to the substrate 2, and the avoidance groove 111 is used for the injection mold core shaft 61 to pass through; the distance between the central axis of the first vent hole 14 and the second vent hole 15 and the substrate 2 is defined as the first distance, and the sum of the radius of the first vent hole 14 and the first distance and the sum of the radius of the second vent hole 15 and the first distance are both smaller than the distance between the bottom wall of the avoidance groove 111 and the substrate 2. The avoidance groove 111 is provided at the end of the light shielding plate 11 with its opening facing the substrate 2, and the avoidance groove 111 is opposite to the first vent hole 14 and the second vent hole 15, and the adhesive can enter the avoidance groove 111 to block the avoidance groove 111 when applying glue.

[0041] Specifically, the apertures of the first air hole 14 and the second air hole 15 are relatively small. Generally, the diameters of the first air hole 14 and the second air hole 15 are set to 0.1 mm to meet the ventilation requirements. In this embodiment, the diameters of the first air hole 14 and the second air hole 15 are both greater than or equal to 0.1 mm and less than or equal to 0.2 mm. The distance between the bottom wall of the avoidance groove 111 and the substrate 2 is 0.3 mm to 0.5 mm. The spacing between the light baffle 11 and the substrate 2 allows the injection mold core shaft 61 to pass smoothly, which ensures both the ventilation effect and the coating requirements of the adhesive.

[0042] In other embodiments of the present invention, the light blocking plate 11 and the substrate 2 can be spaced apart to form a first space, and the sum of the radius of the first ventilation hole 14 and the first distance and the sum of the radius of the second ventilation hole 15 and the first distance are both smaller than the distance between the end of the light blocking plate 11 and the substrate 2.

[0043] In this embodiment, the bottom of the first accommodating groove 12 has a first lens mounting hole 16 opposite to the light projecting chip 3 , and the bottom of the second accommodating groove 13 has a second lens mounting hole 17 opposite to the light receiving chip 4 .

[0044] An embodiment of a package shell mother body, such as Figure 5 As shown, it includes a plurality of the above-mentioned packaging shells 1, each packaging shell 1 is sequentially connected along the direction from the first vent hole 14 to the second vent hole 15 through a connecting section 5, and the first vent hole 14 of each packaging shell 1 and the second vent hole 15 of each packaging shell 1 are molded by the same injection mold core shaft 61. The mold structure for molding the packaging shell mother body is as follows Figure 6As shown, it includes an upper mold 62, a lower mold 63 and an injection mold core shaft 61. The upper mold 62 and the lower mold 63 are matched to form a mold cavity, and the injection mold core shaft 61 is inserted into the upper mold 62. Specifically, the package shell matrix can be in a strip shape or a plate shape. When the package shell matrix is ​​set to a strip shape, a row of package shells 1 arranged along the length direction of the package shell matrix is ​​provided on the package shell matrix; when the package shell matrix is ​​set to a plate shape, multiple rows and columns of package shells 1 are arranged in a rectangular manner on the package shell matrix. By cutting the package shell matrix, multiple package shells 1 can be obtained, which improves the processing efficiency of the package shell 1.

[0045] An embodiment of a packaging structure, such as Figure 7 As shown, the package shell 1 includes the above-mentioned package shell 1, and also includes a substrate 2 connected to the notch end of the package shell 1, a light-projecting chip 3 and a light-receiving chip 4 fixed on the substrate 2; an adhesive is provided in the first space between the light-blocking plate 11 and the substrate 2. Specifically, the light-projecting chip 3 can be directly connected to the substrate 2, and a mounting seat 21 can be provided on the substrate 2, and the light-projecting chip 3 is connected to the mounting seat 21. In this embodiment, the mounting seat 21 is provided on the substrate 2, and the light-projecting chip 3 is connected to the mounting seat 21. The mounting seat 21 is penetrated in the first space, and the end of the light-blocking plate 11 facing the substrate 2 is bonded to the mounting seat 21.

[0046] An embodiment of a packaging method, such as Figures 8 to 11 As shown, the following steps are included:

[0047] A plurality of optical units are connected at intervals along a first direction on a substrate 2, and each optical unit comprises a light-projecting chip 3 and a light-receiving chip 4 arranged at intervals along the first direction;

[0048] Install the lens 8 at each of the first lens mounting hole 16 and the second lens mounting hole 17 of the package shell body to form the package shell body;

[0049] Fill the first spaces of the package shell matrix with adhesive, connect the package shell matrix to the substrate 2, and allow the light-projecting chips 3 and the light-receiving chips 4 to enter the first receiving grooves 12 and the second receiving grooves 13 of the package shell matrix, respectively, to form a package matrix;

[0050] The package body matrix is ​​divided into a plurality of packages along each connecting section 5 of the package shell matrix.

[0051] Before installing the lenses 8 at the first lens mounting holes 16 and the second lens mounting holes 17 of the package shell body, the method further includes:

[0052] The package shell body is formed by an injection mold, the injection mold comprises a mold body and a core shaft, the core shaft passes from one side of the mold body to the other side of the mold body to form the first ventilation holes 14 and the second ventilation holes 15.

[0053] Wherein, a plurality of groups of optical units are connected at intervals along a first direction on the substrate 2, including:

[0054] Bonding: Connect the light-emitting chip 3 and the light-receiving chip 4 to the substrate 2;

[0055] Wire bonding is performed on the substrate 2 and the pads of the light-emitting chip 3 to make the light-emitting chip and the light-receiving chip conductive with the substrate 2.

[0056] In summary, the packaging shell 1 of the present invention has a receiving groove, the notch end of the receiving groove is used to be connected to the substrate 2, the middle part of the receiving groove is provided with a light blocking plate 11, the light blocking plate 11 divides the receiving groove into a first receiving groove 12 and a second receiving groove 13, the first receiving groove 12 and the second receiving groove 13 are respectively used to accommodate the light projecting chip 3 and the light receiving chip 4 connected to the substrate 2; the groove wall of the first receiving groove 12 on the side opposite to the light blocking plate 11 is provided with a first vent hole 14, and the groove wall of the second receiving groove 13 on the side opposite to the light blocking plate 11 is provided with a second vent hole 15; the packaging shell 1 is composed of It is injection molded, and the first air vent 14 and the second air vent 15 are both molded by the same injection mold core shaft 61; there is a first space between the end of the light blocking plate 11 close to the substrate 2 and the substrate 2, and the first space is used for the injection mold core shaft 61 to pass through; the first space is also used to set an adhesive to bond the light blocking plate 11 to the substrate 2; the first air vent 14 and the second air vent 15 are not set at the light-transmitting hole, thereby avoiding contamination of the lens 8; moreover, the first air vent 14 and the second air vent 15 can be molded by the same injection mold core shaft 61, which is convenient for batch processing of the packaging shell 1.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A packaging shell, characterized in that: The invention comprises a packaging shell (1), the packaging shell (1) having a receiving groove, the notch end of the receiving groove being used to be connected to a substrate (2), the middle part of the receiving groove having a light blocking plate (11), the light blocking plate (11) dividing the receiving groove into a first receiving groove (12) and a second receiving groove (13), the first receiving groove (12) and the second receiving groove (13) being used to respectively receive a light projecting chip (3) and a light receiving chip (4) connected to the substrate (2); A first vent hole (14) is provided on the groove wall of the first receiving groove (12) on the side opposite to the light shielding plate (11), and a second vent hole (15) is provided on the groove wall of the second receiving groove (13) on the side opposite to the light shielding plate (11); The packaging shell (1) is formed by injection molding, the first vent hole (14) and the second vent hole (15) are both formed by the same injection mold core shaft (61), and the first vent hole (14) and the second vent hole (15) are both arranged close to the substrate (2), and a first space is provided between the light blocking plate (11) and the substrate (2), and the first space is used for the injection mold core shaft (61) to pass through; the first space is also used for arranging an adhesive so that the light blocking plate (11) and the substrate (2) are bonded.

2. The packaging shell according to claim 1, characterized in that: The apertures of the first ventilation hole (14) and the second ventilation hole (15) are coaxially arranged.

3. The packaging shell according to claim 1, characterized in that: The first ventilation hole (14) and the second ventilation hole (15) have the same aperture.

4. The packaging shell according to claim 1, characterized in that: The first space comprises an avoidance groove (111) arranged at one end of the light blocking plate (11) close to the substrate (2), and the avoidance groove (111) is used for allowing the injection mold core shaft (61) to pass through; The distance between the central axis of the first ventilation hole (14) and the second ventilation hole (15) and the substrate (2) is defined as a first distance, and the sum of the radius of the first ventilation hole (14) and the first distance and the sum of the radius of the second ventilation hole (15) and the first distance are both smaller than the distance between the bottom wall of the avoidance groove (111) and the substrate (2).

5. The packaging shell according to claim 4, characterized in that: The diameters of the first ventilation hole (14) and the second ventilation hole (15) are both greater than or equal to 0.1 mm and less than or equal to 0.2 mm.

6. The packaging shell according to claim 1, characterized in that: The bottom of the first accommodating groove (12) has a first lens mounting hole (16) opposite to the light-projecting chip (3); the bottom of the second accommodating groove (13) has a second lens mounting hole (17) opposite to the light-receiving chip (4).

7. A packaging shell matrix, characterized in that: The invention comprises a plurality of packaging shells (1) as claimed in any one of claims 1 to 6, wherein each of the packaging shells (1) is connected in sequence along the direction from the first vent hole (14) to the second vent hole (15) via a connecting section (5), and the first vent hole (14) of each of the packaging shells (1) and the second vent hole (15) of each of the packaging shells (1) are molded using the same injection mold core shaft (61).

8. A packaging structure, characterized in that: The packaging shell (1) comprises the packaging shell (1) as claimed in any one of claims 1 to 6, and further comprises a substrate (2) connected to the notch end of the packaging shell (1), a light-projecting chip (3) and a light-receiving chip (4) fixed on the substrate (2); and an adhesive layer (7) is provided in the first space between the light-blocking plate (11) and the substrate (2).

9. A packaging method, characterized in that: The following steps are involved: A plurality of groups of optical units are connected on a base plate (2) at intervals along a first direction, each of the optical units comprising a light projecting chip (3) and a light receiving chip (4) arranged at intervals along the first direction; Installing lenses (8) at each of the first lens mounting holes (16) and the second lens mounting holes (17) of the package shell (1) body to form the package shell (1) body; Filling adhesive in each first space of the package shell (1) mother body, connecting the package shell (1) mother body to the substrate (2) mother board, and allowing each light-projecting chip (3) and each light-receiving chip (4) to enter each first receiving groove (12) and each second receiving groove (13) of the package shell (1) mother body, respectively, to form a package body mother body; The package body matrix is ​​divided into a plurality of packages along each connecting section (5) of the package shell (1) matrix.

10. The packaging method according to claim 9, characterized in that: Before installing the lenses (8) at the first lens mounting holes (16) and the second lens mounting holes (17) of the main body of the packaging shell (1), the method further comprises: The encapsulation shell (1) mother body is molded by an injection mold, the injection mold comprising a mold body and a core shaft, the core shaft passes from one side of the mold body to the other side of the mold body to mold each first vent hole (14) and second vent hole (15).

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