Potting shell and potting mold

Abstract

The utility model relates to the technical field of semiconductor manufacturing, and provides a potting shell and a potting mold, comprising a shell body; the shell body is provided with an inner cavity, and the inner cavity is internally provided with a potting area for accommodating a potting material; a protruding part protruding outwards is arranged on the inner wall of the shell body, and the protruding part is located outside the encapsulation area. Through the improvement of the potting shell, when the cover body covers the potting shell, the integrity of the internal potting material is not damaged, and the phenomenon that the potting material has bubbles can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of semiconductor manufacturing, especially relates to a potting shell and potting mould. BACKGROUND

[0002] Potting process is an important part in semiconductor processing technology. Potted is the process of pouring liquid compound potting material into the device containing electronic components and circuit, and curing into a high-performance thermosetting polymer insulating material at room temperature or under heating conditions.

[0003] In the existing potting semiconductor module, the potting shell and the cover plate are matched by the buckle, and the buckle is directly exposed in the inner cavity of the potting shell. When the potting material is poured into the inner cavity of the potting shell, the buckle directly contacts with the potting material.

[0004] Because of the gap between the potting shell and the cover plate, when the blowing stage is carried out after the potting is completed, the blowing gas is easy to enter the inside of the potting shell through the gap between the shell and the cover plate. Because the buckle is inserted into the potting material, the integrity of the surface of the potting material is damaged, and a gap is easy to be formed between the buckle and the potting material. The blowing gas in the inside of the potting shell is easy to enter the potting material through the gap between the potting material and the buckle, so that the bubbles appear in the inside of the potting material, which affects the potting quality.

[0005] Therefore, the utility model provides a kind of potting shell and potting module to improve the phenomenon that the above-mentioned potting material appears bubble. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of potting shell and potting mould, by the improvement of potting shell, when cover body is covered in potting shell, the integrity of internal potting material will not be damaged, and the phenomenon that the potting material appears bubble can be improved.

[0007] The utility model provides a kind of potting shell, comprising:

[0008] The shell body has an inner cavity, and the inner cavity has a potting area for accommodating potting material.

[0009] The inner wall of the shell body is provided with a protruding portion protruding outward, and the protruding portion is located outside the potting area.

[0010] Optionally, the inner wall of the shell body has a buffer surface between the protruding portion and the potting area.

[0011] From the direction close to the potting area to the direction close to the protruding portion, the buffer surface extends to the direction close to the center of the potting area.

[0012] Optionally, the inner wall of the shell body is provided with a flow resistance part protruding outward, and the flow resistance part is located between the protruding part and the pouring area.

[0013] Optionally, when the inner wall of the shell body is provided with a buffer surface, one end of the buffer surface is connected with the inner wall of the pouring area, and the other end of the buffer surface is connected with the flow resistance part.

[0014] Optionally, the protruding part is made of elastic material.

[0015] Optionally, the pouring shell further comprises a clamping piece, and the clamping piece is arranged in the shell body, and at least a part of the clamping piece protrudes from the inner wall of the shell body to form the protruding part.

[0016] Optionally, the clamping piece is detachably arranged on the inner wall of the shell body.

[0017] Optionally, the inner wall of the shell body is provided with a mounting groove, and a part of the clamping piece is arranged in the mounting groove.

[0018] The utility model also provides a pouring mold which comprises a cover body and the pouring shell mentioned above;

[0019] The cover body is provided with a recessed part, the cover body covers the shell body, and the protruding part is clamped in the recessed part.

[0020] Optionally, when the inner wall of the shell body is provided with a flow resistance part, one end of the cover body is attached to the flow resistance part.

[0021] In this way, the pouring shell is provided with the protruding part on the inner wall to cooperate with the cover body, and the cover body is fixed relative to the shell body. Since the protruding part is located outside the pouring area, the protruding part will not contact the pouring material during pouring. Therefore, the surface of the pouring material is smooth, and the integrity of the surface of the pouring material will not be damaged by the protruding part to form a gap. In the blowing stage, the phenomenon of blowing gas entering the pouring material is improved, and the phenomenon of bubbles appearing in the pouring material is improved, the integrity of the pouring material is ensured, and the pouring quality is improved.

[0022] In addition, the protruding part is located outside the pouring area, the protruding part does not directly contact the pouring material, the movement of the protruding part is not restricted by the pouring material, the cooperation between the protruding part and the cover body is facilitated, and the cover body is easy to disassemble, so as to improve the pouring efficiency, reduce the demolding difficulty, and reduce the production cost and labor cost. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a partial structure schematic view of the pouring mold of an embodiment of the utility model;

[0024] Figure 2 Structure diagram of the clamping piece of an embodiment of the present application;

[0025] Figure 3 Structure diagram of the partial structure of the potting shell of an embodiment of the present application;

[0026] Figure 4 Structure diagram of the cover of an embodiment of the present application;

[0027] Figure 5 Structure diagram of the cooperation of the cover and the clamping piece of an embodiment of the present application;

[0028] Figure 6 Structure diagram of the partial structure of the potting mold of another embodiment of the present application;

[0029] Figure 7 Structure diagram of the partial structure of the potting shell of another embodiment of the present application;

[0030] Figure 8 Structure diagram of the partial structure of the clamping piece of another embodiment of the present application.

[0031] In the drawings:

[0032] 100 - potting shell;

[0033] 10 - shell body; 11 - potting area; 12 - protruding part; 13 - mounting groove; 14 - buffer surface; 15 - flow resistance part;

[0034] 20 - clamping piece; 21 - ball head; 22 - circular truncated cone part;

[0035] 200 - cover; 210 - recessed part; 220 - boss;

[0036] 300 - silica gel potting material;

[0037] 400 - anti-sulfur potting material. DETAILED DESCRIPTION

[0038] The potting shell and the potting mold of the present application are further described in detail below in combination with the drawings and specific embodiments. The advantages and features of the present application will be more apparent according to the following description. It should be noted that the drawings are very simplified and use non-precise proportions, and are only used to facilitate and clarify the purpose of assisting the description of the embodiments of the present application.

[0039] As used in the present utility model, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. The term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise. The term "at least one" is generally employed in its sense including "one or more" unless the context clearly dictates otherwise. The terms "first," "second," "third," etc. are merely used to describe one or more features and do not imply relative importance or a number of the features indicated. Thus, features defined with "first," "second," "third," etc. can explicitly or implicitly include one or at least two of the features. In addition, as used in the present utility model, "mounting," "connected," "connection," one element "disposed" in another element should be understood broadly, and generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the two elements can be directly or indirectly connected, coupled, cooperated or transmitted through intermediate elements, and cannot be understood as indicating or implying the spatial position relationship between the two elements, i.e. one element can be in any direction inside, outside, above, below or one side of another element, unless the content is otherwise clearly indicated. For those skilled in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances. In addition, directional terms such as above, below, up, down, upward, downward, left, right, etc. are used relative to the exemplary embodiments as they are shown in the drawings, upward or upward direction is toward the top of the corresponding drawing, and downward or downward direction is toward the bottom of the corresponding drawing.

[0040] The embodiment provides a pouring and sealing mold, which comprises a pouring and sealing shell 100 and a cover 200.

[0041] The pouring and sealing shell 100 comprises a shell body 10;

[0042] The shell body 10 has an inner cavity, and the inner cavity has a pouring area 11 for accommodating pouring material.

[0043] In combination Figure 1 As shown, the shell body 10 is in a hollow structure, and the upper part is in an open structure, and the cover 200 covers the opening of the shell body 10. Figure 1 Only a part (left half) of the shell body 10 is shown.

[0044] In the embodiment, the shell body 10 is in a cuboid structure. In other alternative embodiments, the shape of the shell body 10 can be a cylindrical structure or other special-shaped structure, and the specific shape of the shell body 10 can be set based on the pouring requirement.

[0045] In this embodiment, the shell body 10 can be made of polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), or polyamide fiber (PA), etc. The specific material of the shell body 10 can be selected based on actual use requirements. The material of the cover 200 is consistent with that of the shell body 10.

[0046] Please continue to refer to Figure 1 As shown, the inner cavity of the shell body 10 has two layers of potting materials, namely, a silica gel potting material 300 and a sulfurization-resistant potting material 400. The sulfurization-resistant potting material 400 is located above the silica gel potting material 300. In the inner cavity of the shell body 10, the part corresponding to the silica gel potting material 300 and the sulfurization-resistant potting material 400 is the potting area 11, which is used to accommodate the potting materials.

[0047] In the potting process, first, an electronic component (not shown in the figure) is placed in the inner cavity of the shell body 10, wherein the pins (PINs) of the electronic component are upwardly penetrated to the outside of the shell body 10, then the potting materials are poured, and finally, the cover 200 is covered on the open end of the shell body 10 to solidify and form the potting materials. The cover 200 is provided with an opening hole for the pins to pass through. In other alternative embodiments, when the pins of the electronic component do not penetrate to the outside of the shell body 10, the cover 200 can be adaptively provided with no through hole.

[0048] Please continue to refer to Figure 1 As shown, the inner wall of the shell body 10 is provided with a protruding portion 12 protruding outward, and the protruding portion 12 is located outside the potting area 11.

[0049] In combination with Figure 1 As shown, in this embodiment, the protruding portion 12 is arranged at the inner wall of the shell body 10 close to the opening position thereof. The protruding portion 12 is arranged to cooperate with the cover 200 to fix the cover 200.

[0050] The cover 200 is provided with a recessed portion 210, and when the cover 200 is covered on the shell body 10, a part of the cover 200 extends into the opening of the shell body 10, and the protruding portion 12 is clamped in the recessed portion 210. The positioning of the cover 200 is realized by the cooperation of the protruding portion 12 on the inner wall of the shell body 10 and the recessed portion 210 on the cover 200.

[0051] The protruding part 12 is arranged on the inner wall of the potting shell and used for cooperating with the cover 200, and the cover 200 is further positioned. Since the protruding part 12 is located outside the potting area 11, the protruding part 12 will not be in contact with the potting material during the potting process. Therefore, the surface of the potting material is flat, the integrity of the surface of the potting material will not be damaged by the protruding part 12 to form a gap, and the phenomenon of blowing gas into the potting material is improved during the blowing stage, and the phenomenon of bubbles in the potting material is improved, the integrity of the potting material is ensured, and the potting quality is improved.

[0052] In addition, the protruding part 12 is located outside the potting area 11, and the protruding part 12 will not be in direct contact with the potting material, and the movement of the protruding part 12 will not be restricted by the potting material. The cooperation of the protruding part 12 and the cover is facilitated, and the disassembly of the cover 200 is facilitated, so as to improve the potting efficiency, reduce the demolding difficulty, and further reduce the production cost and the labor cost.

[0053] Please continue to refer to Figure 1 As shown in the drawings, in the embodiment, the protruding part 12 is in a semispherical shape, and the recessed part 210 is in a semispherical structure matched with the protruding part 12. The setting mode facilitates the disassembly of the cover 200. In other alternative embodiments, the protruding part 12 can be set as a cylindrical shape, a cuboid or other shapes, and the specific shape of the protruding part 12 can be flexibly adjusted based on the actual clamping requirements.

[0054] Please refer to Figures 1 to 3 As shown in the drawings, the potting shell 100 further comprises a clamping piece 20, the clamping piece 20 is arranged in the shell body 10, and at least a part of the clamping piece 20 protrudes from the inner wall of the shell body 10 to form the protruding part 12.

[0055] In the embodiment, the inner wall of the shell body 10 is provided with a mounting groove 13, and a part of the clamping piece 20 is arranged in the mounting groove 13, and the other part of the clamping piece 20 is located outside the mounting groove 13 as the protruding part 12. The above setting mode makes the clamping piece 20 detachably arranged on the inner wall of the shell body 10, so as to facilitate the disassembly of the clamping piece 20. In other alternative embodiments, the clamping piece 20 can be integrally formed with the shell body 10.

[0056] Please continue to refer to Figure 2 and Figure 3As shown, in this embodiment, the snap-fit ​​member 20 includes a ball head 21 and a frustum 22, wherein the small-diameter end of the frustum 22 is connected to the ball head 21, the diameter of the small-diameter end of the frustum 22 is smaller than the diameter of the ball head 21, and the diameter of the large-diameter end of the frustum 22 is larger than the diameter of the ball head 21. The mounting groove 13 is shaped to fit the snap-fit ​​member 20. The snap-fit ​​member 20 is conformally snapped into the mounting groove 13, and a portion of the ball head 21 is located outside the mounting groove 13 and protrudes from the inner wall of the outer casing 10 as a protrusion 12.

[0057] In this embodiment, the protrusion 12 is made of an elastic material, and furthermore, the entire snap-fit ​​component 20 is made of an elastic material. For example, the snap-fit ​​component 20 is made of high-temperature resistant silicone or high-temperature resistant rubber. The protrusion 12 can elastically deform, which facilitates the assembly and disassembly of the cover 200. Furthermore, the overall elastic deformation of the snap-fit ​​component 20 also facilitates the assembly of the snap-fit ​​component 20 with the mounting groove 13.

[0058] Please refer to Figure 4 and Figure 5 As shown, in this embodiment, the cover 200 has a plate-like structure. The inner side of the cover 200 has a protrusion 220, which is hollow. The shape of the outer contour of the protrusion 220 matches the shape of the opening of the outer shell 10. When the cover 200 covers the outer shell 10, the protrusion 220 extends into the opening of the outer shell 10. A recess 210 is provided on each side of the protrusion 220. Correspondingly, two snap-fit ​​pieces 20 are installed on the inner wall of the outer shell 10, which are adapted to the two recesses 210. The two snap-fit ​​pieces 20 engage with the two recesses 210 respectively to form a stable and reliable fixation of the cover 200.

[0059] In other alternative embodiments, the number of recesses 210 on the cover 200 and the number of snap-fit ​​members 20 can be three, four, or more. The specific number of recesses 210 and snap-fit ​​members 20 can be adjusted adaptively based on actual usage requirements.

[0060] Please continue to refer to this. Figure 1 and Figure 3 As shown, the inner wall of the outer shell body 10 has a buffer surface 14, which is located between the protrusion 12 and the potting area 11;

[0061] From the direction near the filling area 11 towards the direction near the protrusion 12 ( Figure 1 (From bottom to top), the buffer surface 14 extends toward the center of the filling area 11. The arrangement of the buffer surface 14 in this structure causes the area of ​​the inner cavity of the outer shell body 10 above the filling area 11 to be in an upward constricted shape.

[0062] Combination Figure 1As shown, in this embodiment, the buffer surface 14 is a planar structure, extending obliquely towards the center of the cavity from bottom to top. After the potting material is poured into the potting area 11, the potting material is located below the buffer surface 14. During the purging stage, the buffer surface 14 helps to prevent the airflow entering the outer shell 10 from impacting the interface between the potting material and the outer shell 10, thereby preventing the airflow from entering the potting material through the gap between the potting material and the inner wall of the outer shell 10, further improving the phenomenon of air bubbles appearing inside the potting material, ensuring the integrity of the potting material, and improving the potting quality.

[0063] In this embodiment, the buffer surface 14 is configured as a planar structure. In other alternative embodiments, the buffer surface 14 may also be configured as a curved surface. The specific structure of the buffer surface 14 can be adaptively adjusted based on actual usage requirements.

[0064] Please continue to refer to this. Figure 1 and Figure 3 As shown, the inner wall of the outer shell body 10 is provided with an outwardly protruding flow-blocking part 15, which is located between the protrusion 12 and the potting area 11.

[0065] like Figure 1 As shown, the outer shell body 10 has a wall thickness that is thicker at the top and thinner at the bottom. That is, the wall thickness of the outer shell body 10 is thicker at the position corresponding to the protrusion 12 and thinner at the position corresponding to the potting area 11. A buffer surface 14 is naturally formed at the junction of the thick wall and the thin wall.

[0066] The flow-blocking part 15 is a boss protruding from the surface of the thick wall. The flow-blocking part 15 is elongated and extends horizontally (along...). Figure 1 (Extending perpendicularly to the paper surface), there is a certain gap between the upper surface of the flow-blocking part 15 and the lower edge of the cover 200.

[0067] One end of the buffer surface 14 ( Figure 1 The lower end of the buffer surface 14 is connected to the inner wall of the filling area 11, and the other end of the buffer surface 14 is connected to the inner wall of the filling area 11. Figure 1 The upper end of the flow-blocking part 15 is connected to the bottom of the flow-blocking part 15.

[0068] The flow-blocking part 15 blocks the flow below the mating surface between the cover 200 and the inner wall of the outer casing 10. During the purging stage, when gas flows into the outer casing 10 through the gap between the cover 200 and the inner wall of the outer casing 10, the flow-blocking part 15 can prevent the airflow from flowing downward along the inner wall of the outer casing 10, thereby forcibly changing the flow direction of the airflow to prevent the airflow from flowing along the inner wall of the outer casing 10 into the interior of the potting material.

[0069] Figure 1The diagram only shows the structure of one sidewall of the outer casing 10. Preferably, the buffer surface 14 and the flow-blocking portion 15 are disposed circumferentially on the inner wall of the outer casing 10, that is, the buffer surface 14 and the flow-blocking portion 15 form a closed-loop structure along the circumference of the inner wall of the outer casing 10.

[0070] Please refer to Figure 6 As shown, Figure 6 Another implementation of the potting mold is given in the paper.

[0071] Figure 6 and Figure 1 The difference lies in the different arrangement of the flow-blocking part 15 and the different structure of the cover 200.

[0072] like Figure 6 As shown, from top to bottom, the outer shell body 10 has a thin-thick-thin wall structure. Figure 6 In the outer casing 10, the wall thickness at the top is slightly thicker than that at the bottom. A snap-fit ​​member 20 is installed on the inner wall of the top of the outer casing 10, and the bottom of the outer casing 10 corresponds to the potting area 11. The wall thickness is thicker in the middle of the outer casing 10, forming a protruding structure on its inner wall, which constitutes the flow-blocking part 15. The flow-blocking part 15 is connected to the inner wall of the potting area 11 at an angle, naturally forming a buffer surface 14 at this connection point. The upper surface of the flow-blocking part 15 is horizontal. The cover 200 has a plate structure of uniform thickness. The cover 200 is fully embedded in the opening end of the outer casing 10, and the lower surface of the cover 200 is supported by the upper surface of the flow-blocking part 15, which helps to improve the sealing effect of the cover 200. The flow-blocking part 15 blocks the flow below the joint surface between the cover 200 and the outer casing 10, preventing airflow from flowing downward along the inner wall of the outer casing 10.

[0073] Figure 6 Since the cover 200 has a plate structure with uniform thickness, a handle can be added to the outside of the cover 200 to facilitate its assembly and disassembly.

[0074] Combination Figure 7 and Figure 8 The image shows another embodiment of the snap-fit ​​connector 20 and its installation method.

[0075] The snap-fit ​​component 20 has an approximately T-shaped structure, and the corresponding mounting groove 13 on the inner wall of the outer shell 10 also has a T-shaped structure with the inner side larger than the outer side. The snap-fit ​​component 20 is fitted into the mounting groove 13.

[0076] In other alternative embodiments, the snap-fit ​​member 20 may be connected to the inner wall of the housing body 10 by welding, threaded connection, or other known connection methods. The specific structure of the snap-fit ​​member 20 may be adjusted based on actual usage requirements and the adaptability of the connection method.

[0077] The various embodiments are described in the specification by way of progression, each building on the last to facilitate ease of understanding. The same or similar reference numerals are used in the drawings and description to refer to the same or like parts, components and operations throughout.

[0078] The above description is only a description of the preferred embodiments of the present application, and is not intended to limit the scope of the present application in any way. Any modification or modification made by a person skilled in the art according to the above disclosure is within the protection scope of the claims.

Claims

1. A potted housing characterized by, The potting shell comprises: a shell body; the shell body has an inner cavity, and the inner cavity has a potting area for accommodating potting material; an inner wall of the shell body is provided with a protruding portion protruding outward, and the protruding portion is located outside the potting area.

2. The potted housing of claim 1, wherein, The inner wall of the shell body has a buffer surface, and the buffer surface is located between the protruding portion and the potting area. From a direction close to the potting area to a direction close to the protruding portion, the buffer surface extends towards a center of the potting area.

3. The potted housing according to claim 1 or 2, characterized in that The inner wall of the shell body is provided with a flow resistance portion protruding outward, and the flow resistance portion is located between the protruding portion and the potting area.

4. The potted housing of claim 3, wherein, When the inner wall of the shell body has a buffer surface, one end of the buffer surface is connected to an inner wall of the potting area, and the other end of the buffer surface is connected to the flow resistance portion.

5. The potted housing of claim 1, wherein, The protruding portion is made of elastic material.

6. The potted housing of claim 1, wherein, The potting shell further comprises a clamping piece, and the clamping piece is arranged in the shell body, and at least a part of the clamping piece protrudes from the inner wall of the shell body to form the protruding portion.

7. The potted housing of claim 6, wherein The clamping piece is detachably arranged on the inner wall of the shell body.

8. The potted housing of claim 6, wherein, The inner wall of the shell body is provided with a mounting groove, and a part of the clamping piece is arranged in the mounting groove.

9. A potting mold characterized by, The potting shell comprises a cover and any one of the potting shells according to claims 1 to 8. The cover is provided with a recess, the cover covers the shell body, and the protruding portion is clamped in the recess.

10. The potting mold of claim 9, wherein, When the inner wall of the shell body is provided with a flow resistance portion, one end of the cover is attached to the flow resistance portion.

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