Packaging structure of optical module

Abstract

The utility model discloses a packaging structure of an optical module. The packaging structure comprises a substrate, a sealing housing, a sealing member and a fixing member. The sealing shell comprises side plates and a top plate, the top plate, the side plates and the base plate jointly define a containing cavity, and the connecting positions of the side plates and the base plate are filled with adhesives. An air leakage channel is formed in the top plate and communicates with the interior of the containing cavity and the exterior of the sealing shell. The sealing piece blocks the air leakage channel. The fixing piece is fixedly connected with the top plate so as to abut against the sealing piece, and the side, facing the containing cavity, of the fixing piece extrudes the sealing piece so that at least part of the sealing piece can be pressed into the air leakage channel. The sealing piece is extruded through the fixing piece, it is ensured that the sealing piece makes close contact with the inner wall of the air leakage channel, and therefore the sealing effect is improved. And meanwhile, the fixing piece can provide mechanical support for the sealing piece, and the sealing piece is prevented from shifting or falling off under the change of external force or pressure. Through the synergistic effect of the fixing piece and the sealing piece, the liquid tightness, the stability and the reliability of optical module packaging are improved.

Description

Technical Field

[0001] This utility model relates to the field of optical module technology, and in particular to an optical module packaging structure. Background Technology

[0002] In the manufacturing process of optical modules, liquid tightness is one of the important factors affecting product stability and reliability. To achieve a high level of liquid tightness, many optical module manufacturers currently use encapsulation technology to achieve the required liquid tightness.

[0003] When encapsulating optical modules using adhesive encapsulation technology, structural adhesives that require heat curing are typically used to seal the connection between the encapsulation shell and the substrate. However, after the structural adhesive seals the connection between the encapsulation shell and the substrate, the shell and substrate together form a sealed cavity. During the heat curing process of the structural adhesive, the gas inside the cavity expands due to heat. This expanding gas may cause the structural adhesive to be squeezed out from random locations, forming through holes, thus leading to seal failure.

[0004] To address this issue, existing technologies typically incorporate vents in the encapsulation housing to release excess gas generated during heating due to gas expansion. After the structural adhesive cures, the vents are then sealed at room temperature using one of the following methods: UV adhesive, laser sealing, or injection molding. However, UV adhesives have weak adhesion, leading to leakage after prolonged use; laser welding has a low yield rate, and voids or cracks may appear at the solder joints, causing leakage. Injection molding is a complex process, costly, and difficult to implement. Furthermore, achieving a good bond between the injection-molded plastic and other materials is challenging, resulting in poor liquid tightness. Therefore, existing sealing methods cannot reliably guarantee the liquid tightness of the optical module. Utility Model Content

[0005] The embodiments of this utility model provide a packaging structure for an optical module, which aims to improve the liquid tightness and stability of the optical module packaging.

[0006] To solve the above-mentioned technical problems, the embodiments of this utility model disclose the following technical solutions:

[0007] On the one hand, a packaging structure for an optical module is provided, including:

[0008] A substrate on which multiple components are disposed;

[0009] A sealing shell includes a side plate and a top plate. The top plate and the base plate are respectively connected to both sides of the side plate. The top plate, the side plate, and the base plate together enclose a receiving cavity. The connection between the side plate and the base plate is filled with adhesive. At least some of the plurality of components are located inside the receiving cavity. A venting channel is provided on the top plate, and the venting channel connects the inside of the receiving cavity and the outside of the sealing shell.

[0010] Seals are used to block the venting passages;

[0011] A fixing member covers one end of the venting channel away from the receiving cavity and is fixedly connected to the top plate to abut against the sealing member. The fixing member presses the sealing member against the side facing the receiving cavity to press at least a portion of the sealing member into the venting channel.

[0012] Optionally, the fixing member is plate-shaped and located on the side surface of the top plate opposite to the receiving cavity, and the fixing member is fixedly connected to the opposite side surface of the top plate.

[0013] Optionally, a protrusion is provided on the side surface of the top plate opposite to the accommodating cavity, the top plate has a first through hole, the protrusion has a second through hole, and the first through hole and the second through hole are connected to each other to form the venting channel.

[0014] The sealing element blocks the end of the second through hole that is away from the receiving cavity;

[0015] The fastener includes a cap body and a cap cover connected to each other. The cap body is sleeved on the protrusion. The inner peripheral wall of the cap body is fixedly connected to the outer peripheral wall of the protrusion. The cap cover covers the end of the second through hole away from the receiving cavity. The side of the cap cover facing the protrusion is squeezed against the sealing element.

[0016] Optionally, in the thickness direction of the protrusion, the projected portions of the first through hole and the second through hole overlap.

[0017] Optionally, in the thickness direction of the protrusion, the protrusion has a first part and a second part, the first part being closer to the top plate than the second part, and the projection of the first part being located within the projection of the second part;

[0018] The cap body is fitted onto the second part, and a buckle block protrudes from the end of the cap body away from the cap towards the second part, and the buckle block abuts against the end face of the second part facing the first part.

[0019] Optionally, a first groove is formed on the side surface of the protrusion facing away from the receiving cavity, and the second through hole is formed at the bottom of the first groove;

[0020] The sealing element is plate-shaped and is disposed in the first settling groove, covering the end of the venting channel away from the receiving cavity.

[0021] Optionally, the seal is plate-shaped and covers one end of the vent passage away from the receiving cavity.

[0022] Optionally, a second recess is formed on the side surface of the top plate opposite to the accommodating cavity, the venting channel is formed at the bottom of the second recess, and the sealing element is disposed in the second recess.

[0023] Optionally, the seal is spherical.

[0024] Optionally, the inner diameter of the end of the venting channel away from the receiving cavity is larger than the inner diameter of the end facing the receiving cavity;

[0025] Wherein, the inner diameter of the end of the venting channel away from the receiving cavity is larger than the diameter of the sealing element, and the inner diameter of the end of the venting channel facing the receiving cavity is smaller than the diameter of the sealing element.

[0026] Optionally, the seal is made of rubber or silicone.

[0027] One of the above technical solutions has the following advantages or beneficial effects: In this embodiment, after the sealing shell and substrate are bonded together, the venting channel is sealed by a sealing element to prevent external liquids or gases from entering the accommodating cavity through the venting channel. The fixing element is fixedly connected to the top plate, and by pressing the sealing element with the fixing element, it ensures that the sealing element is in close contact with the inner wall of the venting channel, thereby enhancing the sealing effect. At the same time, the fixing element also provides mechanical support for the sealing element, preventing it from shifting or falling off under external force or pressure changes. In summary, through the synergistic effect of the fixing element and the sealing element, the liquid tightness, stability, and reliability of the optical module packaging are improved. Attached Figure Description

[0028] The technical solution and other beneficial effects of this utility model will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the packaging structure of an optical module provided in one embodiment of this application;

[0030] Figure 2 yes Figure 1 A partial cross-sectional view of the packaging structure of the optical module in the illustrated embodiment;

[0031] Figure 3 This is a partial cross-sectional view of the packaging structure of an optical module provided in an embodiment of this application;

[0032] Figure 4 This is a partial cross-sectional view of the packaging structure of an optical module provided in another embodiment of this application;

[0033] Figure 5 This is a partial cross-sectional view of the packaging structure of an optical module provided in another embodiment of this application;

[0034] Figure 6 This is a partial cross-sectional view of the packaging structure of an optical module provided in another embodiment of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. The packaging structure of the optical module;

[0037] 10. Substrate;

[0038] 20. Sealing shell; 21. Side plate; 22. Top plate; 221. Protrusion; 2211. First part; 2212. Second part; 2213. First settling tank; 222. Second settling tank;

[0039] 30. Sealing components;

[0040] 40. Fastener; 41. Clamping block; 42. Cap body; 421. Snap-on block; 43. Cap cover;

[0041] 50. Receptacle cavity;

[0042] 60. Venting channel; 61. First through hole; 62. Second through hole;

[0043] 70. Adhesives;

[0044] 80. Welding position. Detailed Implementation

[0045] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are merely for explaining the present utility model and are not intended to limit the present utility model.

[0046] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] To improve the liquid tightness and stability of optical module packaging, this utility model discloses an optical module packaging structure.

[0050] The embodiment disclosed in this application is as follows: Figure 1 and Figure 2As shown. The optical module packaging structure 1 disclosed in Embodiment 1 includes a substrate 10, a sealing shell 20, a sealing element 30, and a fixing element 40. The sealing shell 20 includes a side plate 21 and a top plate 22. The top plate 22 and the substrate 10 are respectively connected to both sides of the side plate 21. The top plate 22, the side plate 21, and the substrate 10 together form an accommodating cavity 50. The connection between the side plate 21 and the substrate 10 is filled with adhesive 70. A venting channel 60 is provided on the top plate 22, which connects the inside of the accommodating cavity 50 and the outside of the sealing shell 20. The sealing element 30 blocks the venting channel 60. The fixing element 40 covers the end of the venting channel 60 away from the accommodating cavity 50 and is fixedly connected to the top plate 22 to abut against the sealing element 30. The fixing element 40 presses the sealing element 30 towards the side facing the accommodating cavity 50 to press at least a portion of the sealing element 30 into the venting channel 60. The substrate 10 is a circuit board. In some other embodiments, the substrate 10 is provided with a plurality of components, at least some of which are located inside the accommodating cavity 50.

[0051] In Embodiment 1 of this application, after the sealing shell 20 and the substrate 10 are bonded together, the venting channel 60 is sealed by the sealing member 30 to prevent external liquids or gases from entering the accommodating cavity 50 through the venting channel 60. The fixing member 40 is fixedly connected to the top plate 22. By pressing the sealing member 30 with the fixing member 40, it is ensured that the sealing member 30 is in close contact with the inner wall of the venting channel 60, thereby enhancing the sealing effect. At the same time, the fixing member 40 can also provide mechanical support for the sealing member 30, preventing the sealing member 30 from shifting or falling off under external force or pressure changes. In summary, through the synergistic effect of the fixing member 40 and the sealing member 30, the liquid tightness, stability, and reliability of the optical module packaging are improved.

[0052] In Embodiment 1, a protrusion 221 is provided on the surface of the top plate 22 facing away from the receiving cavity 50. A first through hole 61 is provided on the top plate 22, and a second through hole 62 is provided inside the protrusion 221. The first through hole 61 and the second through hole 62 are connected to each other, forming a venting channel 60. The sealing member 30 is spherical and is partially embedded in the end of the second through hole 62 facing away from the receiving cavity 50, sealing the second through hole 62. The fixing member 40 includes a cap body 42 and a cap cover 43 connected to each other. The cap body 42 is sleeved on the protrusion 221. The inner peripheral wall of the cap body 42 is fixedly connected to the outer peripheral wall of the protrusion 221. The cap cover 43 covers the end of the second through hole 62 facing away from the receiving cavity 50, and the side of the cap cover 43 facing the protrusion 221 is pressed against the sealing member 30.

[0053] In Embodiment 1, the projections of the first through hole 61 and the second through hole 62 overlap in the thickness direction of the protrusion 221. In some other embodiments, the projections of the first through hole 61 and the second through hole 62 may partially overlap, as long as the opposite ends of the first through hole 61 and the second through hole 62 are connected.

[0054] In Embodiment 1, the inner diameter of the end of the venting channel 60 away from the receiving cavity 50 is larger than the inner diameter of the end adjacent to the receiving cavity 50. That is, the diameter of the end of the second through hole 62 away from the first through hole 61 is larger than the diameter of the end of the first through hole 61 facing the receiving cavity 50. Simultaneously, the inner diameter of the end of the venting channel 60 away from the receiving cavity 50 is larger than the diameter of the sealing member 30, and the inner diameter of the end of the venting channel 60 adjacent to the receiving cavity 50 is smaller than the diameter of the sealing member 30. That is, the diameter of the end of the second through hole 62 away from the first through hole 61 is larger than the diameter of the sealing member 30, and the diameter of the end of the first through hole 61 facing the receiving cavity 50 is smaller than the diameter of the sealing member 30. Specifically, in Embodiment 1, the second through hole 62 is a tapered hole; the diameter of the second through hole 62 gradually decreases from the second through hole 62 to the first through hole 61. In some other embodiments, the first through hole 61 and the second through hole 62 are both equal diameter holes, and the diameter of the first through hole 61 is smaller than the diameter of the second through hole 62.

[0055] In this embodiment, the design of the venting channel 60 restricts the movement of the seal 30, preventing it from falling into the receiving cavity 50 when subjected to external force or environmental changes. Simultaneously, since the diameter of the first through hole 61 is smaller than the diameter of the seal 30, when the seal 30 is pressed into the venting channel 60, it undergoes a certain deformation and compression effect, ensuring a tight fit between the seal 30 and the hole wall, improving sealing performance and preventing liquid or gas penetration.

[0056] In Example 1, the sealing element 30 can be made of rubber (such as fluororubber, silicone rubber, or nitrile rubber) or silicone. These materials all have sufficient resilience and can provide a good sealing effect under the compression of the fixing element 40, maintaining good liquid tightness and stability even under changes in temperature and pressure.

[0057] It should be noted that the sealing shell 20 disclosed in Embodiment 1 is made of metal, which can be made of Kovar alloy through a metal injection molding process. The fastener 40 can also be made of metal, such as 304 stainless steel or Kovar alloy, and can be made through a metal injection molding process or a stamping process. In Embodiment 1, the outer peripheral wall of the protrusion 221 has multiple welding positions 80. After the fastener 40 is fitted onto the protrusion 221, the outer peripheral wall of the protrusion 221 and the inner peripheral wall of the cap 42 can be welded and fixed by a through-welding process. By welding, the fastener 40 is firmly connected to the protrusion 221, which effectively prevents the fastener 40 from loosening or falling off due to changes in external pressure or long-term use, and improves the liquid tightness.

[0058] Embodiment two disclosed in this application is as follows: Figure 3As shown. The optical module packaging structure 1 provided in Embodiment 2 of this application differs from the optical module packaging structure 1 in Embodiment 1 in that: in the thickness direction of the protrusion 221, the protrusion 221 has a connected first part 2211 and a second part 2212. The first part 2211 is closer to the top plate 22 than the second part 2212. The projection of the first part 2211 is located within the projection of the second part 2212 (in other words, the outer peripheral wall of the second part 2212 protrudes from the outer peripheral wall of the first part 2211). Also different from Embodiment 1, in Embodiment 2, the cap 42 is fitted onto the second part 2212, and a latching block 421 protrudes from the end of the cap 42 away from the cap 43 towards the second part 2212, and the latching block 421 abuts against the end face of the second part 2212 facing the first part 2211.

[0059] The fastener 40 disclosed in Embodiment 2 can be made of metal, such as 304 stainless steel or Kovar alloy, and can be manufactured by a micrometer process or a stamping process. The snap-fit ​​block 421 of the cap 42 abuts against the end face of the second part 2212 to form a mechanical lock, which enhances the fixing effect of the cap 42, prevents it from loosening due to external force or vibration, and improves the reliability of the encapsulation. The snap-fit ​​block 421 allows the cap 42 to be quickly assembled by snap-fit ​​without additional welding or screw fixing, simplifying the assembly process, improving production efficiency, and reducing production costs. At the same time, the fastener 40 effectively wraps around the second part 2212, further improving the liquid tightness of the encapsulation.

[0060] The optical module packaging structure 1 provided in Embodiment 2 of this application differs from the optical module packaging structure 1 in Embodiment 1 in the following ways. In Embodiment 2, the sealing member 30 is plate-shaped and covers one end of the second through hole 62 away from the receiving cavity 50. Under the pressure of the fixing member 40, the side of the sealing member 30 facing the second through hole 62 is pressed into the second through hole 62. Because the plate-shaped sealing member 30 does not need to be integrally embedded in one end port of the second through hole 62 like the spherical sealing member 30, in Embodiment 2, the first through hole 61 and the second through hole 62 can be equal-diameter holes with the same diameter. The sealing member 30 is plate-shaped, making production simpler and allowing for mass production through die-cutting, stamping, or molding processes. The through hole is designed as an equal-diameter hole, eliminating the need for additional stepped or tapered hole processing, reducing processing complexity and further reducing production costs.

[0061] Furthermore, a first recess 2213 is formed on the side of the protrusion 221 facing away from the receiving cavity 50. A second through hole 62 is formed at the bottom of the first recess 2213. A plate-shaped sealing member 30 is disposed in the first recess 2213 to cover the end of the second through hole 62 facing away from the receiving cavity 50, and the thickness of the sealing member 30 is greater than the depth of the first recess 2213. The first recess 2213 provides a fixed space for the sealing member 30, preventing it from sliding or shifting due to external forces, temperature changes, or pressure fluctuations. Since the thickness of the sealing member 30 is greater than the depth of the first recess 2213, the sealing member 30 will slightly protrude from the first recess 2213 during installation, so that it can be squeezed into the venting channel 60 under the squeezing force of the fixing member 40, thereby improving the sealing effect.

[0062] Embodiment 3 disclosed in this application is as follows: Figure 4 As shown, the differences between the optical module packaging structure 1 provided in Embodiment 3 of this application and the optical module packaging structure 1 in Embodiment 1 will be described below. The surface of the top plate 22 facing away from the accommodating cavity 50 does not have protrusions 221. The venting channel 60 is a through hole penetrating the top plate 22. The spherical seal 30 is partially embedded in the through hole. The fixing member 40 is plate-shaped and located on the surface of the top plate 22 facing away from the accommodating cavity 50. The fixing member 40 presses against the portion of the spherical seal 30 not embedded in the through hole. The fixing member 40 and the top plate 22 are fixedly connected. A second recess 222 is formed on the surface of the top plate 22 facing away from the accommodating cavity 50, and a through hole is formed at the bottom of the second recess 222. The surface of the fixing member 40 facing the top plate 22 is welded to the bottom of the second recess 222.

[0063] With the removal of the bump 221, the back of the top plate 22 is flatter, reducing the overall thickness of the optical module's packaging structure 1. This allows the optical module to be thinner and more compact, making it more suitable for devices with strict size requirements. Simultaneously, the second recess 222 serves a positioning function, ensuring that the seal 30 and the fixing component 40 are accurately placed, avoiding assembly errors and improving product consistency.

[0064] In some embodiments, such as Figure 5 As shown, to facilitate gripping and installing the fastener 40, a clamping block 41 protrudes from the side of the fastener 40 facing away from the top plate 22. In some embodiments, the clamping block 41 is integrally formed with the fastener 40. The clamping block 41 provides gripping points, making it easier to position and grip the fastener 40 during manual installation or automated equipment assembly, reducing the possibility of slippage or falling.

[0065] Embodiment four disclosed in this application is as follows: Figure 6As shown, the packaging structure 1 of the optical module provided in Embodiment 4 of this application differs from the packaging structure 1 of the optical module in Embodiment 3 in the following ways. The sealing member 30 is plate-shaped and partially disposed within the second recess 222. The thickness of the sealing member 30 is greater than the depth of the second recess 222. The fixing member 40 covers the second recess 222 and compresses the sealing member 30, pressing the side surface of the sealing member 30 facing the through hole into the through hole. The plate-shaped sealing member 30 has a larger coverage area and is uniformly compressed by the fixing member 40, which can prevent the sealing member 30 from shifting or falling off due to localized stress concentration. Because the thickness of the sealing member 30 is greater than the depth of the second recess 222, under the compression of the fixing member 40, the sealing member 30 will form a certain degree of rebound and filling within the through hole, ensuring a seamless seal.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A packaging structure for an optical module, characterized in that, include: A substrate on which multiple components are disposed; A sealing shell includes a side plate and a top plate. The top plate and the base plate are respectively connected to both sides of the side plate. The top plate, the side plate, and the base plate together enclose a receiving cavity. The connection between the side plate and the base plate is filled with adhesive. At least some of the plurality of components are located inside the receiving cavity. A venting channel is provided on the top plate, and the venting channel connects the inside of the receiving cavity and the outside of the sealing shell. Seals are used to block the venting passages; A fixing member covers one end of the venting channel away from the receiving cavity and is fixedly connected to the top plate to abut against the sealing member. The fixing member presses the sealing member against the side facing the receiving cavity to press at least a portion of the sealing member into the venting channel.

2. The packaging structure of the optical module according to claim 1, characterized in that, The fastener is plate-shaped and located on the side of the top plate opposite to the accommodating cavity. The fastener is fixedly connected to the opposite side of the top plate.

3. The packaging structure of the optical module according to claim 1, characterized in that, The top plate has a protrusion on the side surface opposite to the accommodating cavity. The top plate has a first through hole, and the protrusion has a second through hole. The first through hole and the second through hole are connected to each other and together form the venting channel. The sealing element blocks the end of the second through hole that is away from the accommodating cavity; The fastener includes a cap body and a cap cover connected to each other. The cap body is sleeved on the protrusion. The inner peripheral wall of the cap body is fixedly connected to the outer peripheral wall of the protrusion. The cap cover covers the end of the second through hole away from the receiving cavity. The side of the cap cover facing the protrusion is squeezed against the sealing element.

4. The packaging structure of the optical module according to claim 3, characterized in that, In the thickness direction of the protrusion, the projected portions of the first through hole and the second through hole overlap.

5. The packaging structure of the optical module according to claim 3, characterized in that, In the thickness direction of the protrusion, the protrusion has a first part and a second part, the first part being closer to the top plate than the second part, and the projection of the first part being located within the projection of the second part; The cap body is fitted onto the second part, and a buckle block protrudes from the end of the cap body away from the cap towards the second part, and the buckle block abuts against the end face of the second part facing the first part.

6. The packaging structure of the optical module according to claim 3, characterized in that, The surface of the protrusion facing away from the accommodating cavity has a first groove, and the second through hole is formed at the bottom of the first groove. The sealing element is plate-shaped and is disposed in the first settling groove, covering the end of the venting channel away from the receiving cavity.

7. The packaging structure of the optical module according to claim 1, characterized in that, The sealing element is plate-shaped and covers the end of the venting channel that is away from the receiving cavity.

8. The packaging structure of the optical module according to claim 7, characterized in that, A second recess is provided on the surface of the top plate opposite to the accommodating cavity, the venting channel is provided at the bottom of the second recess, and the sealing element is provided in the second recess.

9. The packaging structure of the optical module according to claim 1, characterized in that, The seal is spherical.

10. The packaging structure of the optical module according to claim 9, characterized in that, The inner diameter of the end of the venting channel away from the receiving cavity is larger than the inner diameter of the end facing the receiving cavity. Wherein, the inner diameter of the end of the venting channel away from the receiving cavity is larger than the diameter of the sealing element, and the inner diameter of the end of the venting channel facing the receiving cavity is smaller than the diameter of the sealing element.

11. The packaging structure of the optical module according to any one of claims 1-10, characterized in that, The sealing element is made of rubber or silicone.

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