Cap sealing device and cap sealing method for shell of ultra-small discrete device

Abstract

The invention belongs to the technical field of cap sealing of discrete devices, particularly relates to a cap sealing device and method for a shell of an ultra-small-size discrete device, and aims to solve the problems that in the steel clamp fixing process, due to slight vibration of a steel clamp caused by manual operation, a cover plate is likely to deviate, and the surface of the cover plate is likely to be scratched. The balance weight device comprises a base, a balance weight supporting plate and a balance weight rod. The base is connected with the counterweight supporting plate; the base is provided with a plurality of shell positioning grooves which are uniformly distributed, and the groove bottoms of the shell positioning grooves are provided with cover plate positioning grooves; the counterweight support plate is arranged on the upper side of the base, and a plurality of arrangement holes which are uniformly arranged and are through holes are formed in the counterweight support plate; a balance weight lever can be mounted in each mounting hole; when the counterweight rod is mounted, the lower end is inserted into the arrangement hole; the center of the shell positioning groove in the base, the center of the arrangement hole in the balance weight supporting plate and the center of the installation hole in the pressing plate are aligned. According to the invention, the problems of deviation and scratch generated in the fixing process of the shell and the cover plate can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of discrete device capping, and in particular relates to a capping device and a capping method for an ultra-small discrete device housing. Background Art

[0002] A discrete device is a semiconductor device composed of a single transistor or multiple transistors, and is widely used in electronic equipment, communications, computers and other fields.

[0003] In order to ensure that the chips, transistors and other devices in the discrete device will not be disturbed by the outside world and cause damage to the chips, transistors and other devices, a cover is usually installed on the discrete device housing to protect the discrete device. This process is the capping process of the discrete device.

[0004] Most discrete device capping methods use steel clips to fix the housing and cover plates to seal the caps. Especially for ultra-small discrete device housings, which are too small to operate, the housing and cover plates need to be manually aligned and fixed under the steel clips during the production process.

[0005] During the process of fixing the steel clamp, slight vibration of the steel clamp caused by manual operation may cause the cover plate to deviate and the cover plate surface to be scratched. In addition, manual operation can only be performed on a single piece, resulting in low production efficiency and poor consistency, which is not conducive to mass production. Summary of the invention

[0006] In order to solve the above-mentioned problem in the prior art, namely, the problem that slight vibration of the steel clip caused by manual operation during the process of fixing the steel clip may cause the cover plate to deviate and the cover plate surface to be scratched, the present invention provides a capping device and a capping method for an ultra-small discrete device housing.

[0007] In a first aspect, the present application provides a capping device for an ultra-small discrete device housing, which adopts the following technical solution:

[0008] A capping device for an ultra-small discrete device housing comprises a base, a counterweight support plate and a counterweight rod; the base is connected to the counterweight support plate;

[0009] The base is provided with a plurality of uniformly arranged housing positioning grooves, and a cover plate positioning groove is provided at the bottom of the housing positioning groove;

[0010] The counterweight support plate is arranged on the upper side of the base, and a plurality of evenly arranged through holes are provided on the counterweight support;

[0011] There are multiple counterweight rods, and one counterweight rod can be installed in each installation hole; when installing, the lower end of the counterweight rod is inserted into the arrangement hole;

[0012] The center of the outer shell positioning groove on the base, the center of the arrangement hole on the counterweight support plate, and the center of the mounting hole on the pressure plate are aligned.

[0013] By adopting the above technical solution, the counterweight rod is installed between the pressure plate and the counterweight support plate. Finally, the pressure plate, the counterweight support plate and the base are connected together using the clamping screws to complete the arrangement of the capping device. After the capping device is arranged, the cover plate and the ultra-small discrete device housing are inverted in the cover plate positioning groove and the housing positioning groove of the base in turn; the counterweight rod is pressed down, and the lower end of the counterweight rod enters the housing positioning groove, and the housing is pressed down to connect the housing and the cover plate together. The fixing method of the ultra-small discrete device housing and cover plate is cleverly designed. By using the capping device to fix instead of the steel clamp fixing method, the offset and scratch problems caused during the fixing process of the housing and cover plate are avoided, and the fixing efficiency and process consistency of the housing and cover plate are improved.

[0014] Optionally, a pressure plate is installed on the upper side of the counterweight support plate, and a plurality of evenly arranged through-hole mounting holes are opened through the pressure plate, and the upper end of the counterweight rod is inserted into the mounting hole.

[0015] By adopting the above technical solution, a plurality of counterweight rods are pressed down together using a pressing plate, so that the pressing efficiency can be improved.

[0016] Optionally, the counterweight rod includes a lower plug rod, a stopper and an upper plug rod; the stopper is arranged between the counterweight support plate and the pressure plate.

[0017] By adopting the above technical solution and setting a stopper, it is possible to prevent the pressure plate from excessively pressing down the counterweight rod.

[0018] Optionally, a spring is installed between the counterweight support plate and the pressure plate, and the spring is sleeved on the counterweight rod.

[0019] By adopting the above technical solution and setting a spring, the pressure of the counterweight rod directly pressing down the shell and the cover plate can be reduced, thereby avoiding damage to the connection between the cover plate and the shell due to excessive pressure.

[0020] Optionally, top connection holes are formed on both sides of the pressure plate; a counterweight connection hole is formed on the counterweight support plate, and the counterweight connection hole is a threaded hole; a bottom connection hole is formed on the base, and the bottom connection hole is a threaded hole; the top connection hole on the pressure plate, the counterweight connection hole on the counterweight support plate, and the bottom connection hole on the base are aligned;

[0021] The pressing plate is provided with a clamping screw, and the clamping screw passes through the top connecting hole, the counterweight connecting hole and the bottom connecting hole to connect the pressing plate, the counterweight connecting hole and the base together.

[0022] By adopting the above technical solution, the clamping screw is turned to fix the position of the counterweight support plate, the base and the pressure plate, so that the counterweight rod always keeps the shell and the cover plate pressed. Finally, the assembled sealing device, the cover plate and the shell are placed in a vacuum sintering furnace and the vacuum sintering program is run.

[0023] Optionally, a limiting sleeve is sleeved on the rod body of the clamping screw, and the limiting sleeve is arranged between the pressure plate and the counterweight support plate.

[0024] By adopting the above technical solution and setting a limiting sleeve, it is also possible to prevent the pressure plate from pressing the counterweight rod excessively.

[0025] Optionally, a bottom connecting hole is provided on the base, and the end of the clamping screw is inserted into the bottom connecting hole of the base.

[0026] By adopting the above technical solution, the base and the counterweight support plate can be connected together directly by tightening the screws.

[0027] Optionally, a receiving groove is provided on the base, the receiving groove is provided on the upper surface of the base, and the housing positioning groove is provided on the receiving groove;

[0028] The counterweight support plate is provided with an arrangement groove, the arrangement hole is provided on the lower surface of the counterweight support plate where the arrangement groove is provided.

[0029] By adopting the above technical solution, it is convenient to put the shell and the cover plate into the sealing cap device.

[0030] Optionally, the accommodating groove is a through groove in the horizontal direction; and the arranging groove is a through groove in the horizontal direction.

[0031] In a second aspect, the present application provides a capping method of a capping device based on an ultra-small discrete device housing, which adopts the following technical solution:

[0032] A capping method for a capping device based on an ultra-small discrete device housing includes steps S1 to S6, each of which is described in detail as follows:

[0033] Step S1: The cover plate and the ultra-small discrete device housing are sequentially placed upside down in the cover plate positioning groove and the housing positioning groove of the base;

[0034] Step S2: Installing the counterweight rod into the arrangement hole of the counterweight support plate;

[0035] Step S3: putting the spring on the counterweight rod;

[0036] Step S4: Install the pressure plate on the upper end of the counterweight rod equipped with the spring;

[0037] Step S5: Pass the clamping screw through the top connection hole of the spring pressure plate, the limiting sleeve, the counterweight connection hole of the counterweight support plate, and the base, press the pressure plate downward, and when the pressure plate is pressed downward, move the lower edge of the counterweight rod so that the lower end of the counterweight rod enters the positioning groove of the shell, press the shell downward, connect the shell and the cover plate together, and then tighten the clamping screw;

[0038] Step S6: placing the assembled sealing cap device together with the outer shell and the cover plate in a vacuum sintering furnace and running a vacuum sintering program.

[0039] Optionally, before performing step S4, a limiting sleeve is installed on the counterweight support plate.

[0040] Beneficial effects of the present invention:

[0041] (1) The present invention has cleverly designed a fixing method for the housing and cover of ultra-small discrete devices. By using a spring array fixture to fix the housing instead of a steel clip, the problem of displacement and scratching during the fixing process of the housing and cover is avoided, thereby improving the fixing efficiency and process consistency of the housing and cover.

[0042] (2) The present invention increases the capping capacity of a single furnace and improves production efficiency by adopting a vacuum sintering capping method instead of a melting capping method. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0044] Figure 1 Schematic diagram of the structure of the capping device in this embodiment;

[0045] Figure 2 is a schematic diagram of the base in this embodiment;

[0046] Figure 3 is a schematic diagram of a counterweight connecting plate in this embodiment;

[0047] Figure 4 Schematic diagram of the pressing plate in this embodiment;

[0048] Figure 5 Schematic diagram of the counterweight rod in this embodiment.

[0049] Explanation of the accompanying drawings: 1. Base; 11. Receiving groove; 12. Bottom connecting hole; 2. Counterweight support plate; 21. Arrangement groove; 22. Arrangement hole; 23. Counterweight connecting hole; 3. Limiting sleeve; 4. Pressure plate; 41. Mounting hole; 42. Top connecting hole; 5. Pressing screw; 6. Counterweight rod; 61. Lower plug rod; 62. Stop block; 63. Upper plug rod; 7. Spring; 8. Cover plate positioning groove; 9. Shell positioning groove. DETAILED DESCRIPTION

[0050] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0051] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] The present invention provides a capping device and a capping method for an ultra-small discrete device housing. Figure 1 The capping device of the ultra-small discrete device housing includes a base 1, a counterweight support plate 2, a pressing plate 4, a pressing screw 5 and a counterweight rod 6. The base 1, the counterweight support plate 2 and the pressing plate 4 have the same length and width.

[0053] Reference Figure 1 , Figure 2 , a receiving groove 11 is provided on the base 1, and the receiving groove 11 is provided on the upper surface of the base 1, and the receiving groove 11 is a through groove in the horizontal direction. A plurality of shell positioning grooves 9 are provided at the bottom of the receiving groove 11, and the shell is arranged in the shell positioning groove 9. A cover plate positioning groove 8 is provided at the bottom of the shell positioning groove 9, and the cover plate positioning groove 8 is provided along the depth direction of the shell positioning groove 9, and the cover plate is arranged in the cover plate positioning groove 8. Among them, the shapes of the cover plate positioning groove 8 and the shell positioning groove 9 are determined according to the shape of the discrete device shell. In this embodiment, the shell positioning groove 9 and the cover plate positioning groove 8 are both rectangular grooves. A plurality of shell positioning grooves 9 are evenly arranged on the base 1. Two groups of bottom connecting holes 12 are provided on both sides of the base 1, and the bottom connecting holes 12 are threaded holes, and the two groups of bottom connecting holes 12 are symmetrically arranged on the base 1 along the receiving groove 11.

[0054] Reference Figure 3 The counterweight support plate 2 is arranged on the upper side of the base 1. An arrangement groove 21 is provided on the counterweight support plate 2. The arrangement groove 21 is provided on the lower surface of the counterweight support plate 2, and the arrangement groove 21 is a through groove in the horizontal direction. A plurality of arrangement holes 22 are provided at the bottom of the arrangement groove 21. The arrangement holes 22 are through holes, and the plurality of arrangement holes 22 are evenly arranged on the counterweight support plate 2. Two groups of counterweight connection holes 23 are provided on both sides of the counterweight support plate 2. The counterweight connection holes 23 are threaded holes, and the two groups of counterweight connection holes 23 are symmetrically arranged on the base 1 along the arrangement groove 21.

[0055] When the counterweight support plate 2 is installed, the counterweight support plate 2 is installed on the upper side of the base 1, and the counterweight support plate 2 is aligned with the base 1. When aligned, the arrangement groove 21 is aligned with the accommodating groove 11, the center of the arrangement hole 22 is aligned with the center of the outer shell positioning groove 9, and the counterweight connecting hole 23 is aligned with the bottom connecting hole 12.

[0056] Reference Figure 4 The pressing plate 4 is arranged on the upper side of the counterweight support plate 2, and a plurality of mounting holes 41 are formed through the pressing plate 4, and the plurality of mounting holes 41 are evenly arranged on the pressing plate 4. Two groups of top connection holes 42 are formed on both sides of the pressing plate 4, and the two groups of top connection holes 42 are symmetrically arranged on the base 1.

[0057] When installing the pressure plate 4, the pressure plate 4 is installed on the upper side of the counterweight support plate 2, and the pressure plate 4 is aligned with the counterweight support plate 2. When aligned, the center of the installation hole 41 is aligned with the center of the arrangement hole 22, and the top connection hole 42 is aligned with the counterweight connection hole 23.

[0058] The clamping screw 5 is inserted on the pressure plate 4, and the clamping spring 7 passes through the top connecting hole 42, and the end thereof is inserted into the counterweight connecting hole 23 on the counterweight support plate 2, so as to connect the pressure plate 4 and the counterweight support plate 2 together.

[0059] Among them, refer to Figure 1 The rod of the clamping screw 5 is sleeved with a limiting sleeve 3, which is arranged between the pressing plate 4 and the counterweight support plate 2 to separate the counterweight support plate 2 from the pressing plate 4. The end of the clamping screw 5 can also be inserted into the bottom connection hole 12, so that the clamping screw 5 connects the pressing plate 4, the counterweight support plate 2, and the base 1 together. In addition, when the base 1 and the counterweight support plate 2 are connected together, it can be directly realized by the clamping screw 5.

[0060] Reference Figure 5 , a plurality of counterweight rods 6 are provided, and a counterweight rod 6 can be installed in each mounting hole 41. The counterweight rod 6 includes a lower plug rod 61, a block 62 and an upper plug rod 63. The lower plug rod 61, the block 62 and the upper plug rod 63 are integrally formed. The counterweight rod 6 is installed between the counterweight support rod and the pressure plate 4. When the counterweight rod 6 is installed, the lower plug rod 61 is inserted into the arrangement hole 22, and the end of the lower plug rod 61 is inserted into the arrangement groove 21; the block 62 is arranged between the counterweight support plate 2 and the pressure plate 4; the upper plug rod 63 is inserted into the mounting hole 41, and the end of the upper plug rod 63 is inserted into the mounting hole 41. Among them, a spring 7 is installed between the block 62 and the pressure plate 4, and the spring 7 is sleeved on the upper plug rod 63.

[0061] When the lower plug rod 61 is inserted into the arrangement hole 22 , the lower plug rod 61 is plugged and matched with the arrangement hole 22 ; when the upper plug rod 63 is inserted into the installation hole 41 , the upper plug rod 63 is plugged and matched with the installation hole 41 .

[0062] The present application embodiment discloses a method for using a capping device for an ultra-small discrete device housing:

[0063] First, align and install the counterweight support plate 2 on the base 1, then install the counterweight rod 6 between the pressure plate 4 and the counterweight support plate 2, and install the spring 7 and the limiting sleeve 3. Finally, use the compression screw 5 to connect the pressure plate 4, the counterweight support plate 2 and the base 1 together to complete the arrangement of the capping device.

[0064] After the capping device is arranged, the cover plate and the ultra-small discrete device housing are inverted in the cover plate positioning groove 8 and the housing positioning groove 9 of the base 1 in sequence; then the pressing plate 4 is pressed down, and the lower edge of the counterweight rod 6 is pressed down, so that the lower end of the counterweight rod 6 enters the housing positioning groove 9, and the housing is pressed down to connect the housing with the cover plate, and then the clamping screw 5 is screwed, and the clamping screw 5 fixes the position of the counterweight support plate 2, the base 1 and the pressing plate 4 at this time, and under the action of the spring 7, the counterweight rod 6 always keeps the housing and the cover plate pressed. Finally, the assembled capping device together with the cover plate and the housing are placed in a vacuum sintering furnace and the vacuum sintering program is run.

[0065] The provision of spring 7 can reduce the pressure of the counterweight rod 6 directly pressing down the shell and the cover plate, and avoid the pressure causing damage to the connection between the cover plate and the shell. The provision of limiting sleeve 3 and stopper 62 can prevent the pressure plate 4 from excessively pressing down the counterweight rod 6. The present invention has made an ingenious design for the fixing method of the shell and the cover plate of ultra-small discrete devices. By using a sealing cap device to fix instead of a steel clamp fixing method, the deflection and scratch problems generated during the fixing process of the shell and the cover plate are avoided, and the fixing efficiency and process consistency of the shell and the cover plate are improved.

[0066] The present application also discloses a capping method of a capping device based on an ultra-small discrete device housing, including steps S1 to S7, each of which is described in detail as follows:

[0067] Step S1: The cover plate and the ultra-small discrete device housing are sequentially placed upside down in the cover plate positioning groove 8 and the housing positioning groove 9 of the base 1;

[0068] Step S2: Install the counterweight rod 6 into the arrangement hole 22 of the counterweight support plate 2;

[0069] Step S3: Put the spring 7 on the upper plug rod 63 of the counterweight rod 6;

[0070] Step S4: Install the limiting sleeve 3 on the counterweight connecting hole 23 of the counterweight support plate 2;

[0071] Step S5: Install the pressure plate 4 on the upper end of the counterweight rod 6 equipped with the spring 7;

[0072] Step S6: Pass the clamping screw 5 through the top connection hole 42 of the spring 7 pressure plate 4, the limiting sleeve 3, the counterweight connection hole 23 of the counterweight support plate 2, and the bottom connection hole 12 of the base 1, press down the pressure plate 4, and when the pressure plate 4 is pressed down, move the lower edge of the counterweight rod 6 so that the lower end of the counterweight rod 6 enters the positioning groove 9 of the housing, press down the housing, connect the housing and the cover plate together, and then tighten the clamping screw 5 to lock it;

[0073] Step S7: placing the assembled sealing cap device together with the outer shell and the cover plate in a vacuum sintering furnace and running a vacuum sintering program.

[0074] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0075] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A capping device for an ultra-small discrete device housing, characterized in that: It comprises a base (1), a counterweight support plate (2) and a counterweight rod (6); the base (1) and the counterweight support plate (2) are connected together; The base (1) is provided with a plurality of evenly arranged housing positioning grooves (9), and a cover plate positioning groove (8) is provided at the bottom of the housing positioning groove (9); The counterweight support plate (2) is arranged on the upper side of the base (1), and a plurality of evenly arranged through holes (22) are provided on the counterweight support; A plurality of the counterweight rods (6) are provided, and one counterweight rod (6) can be installed in each installation hole (41); when the counterweight rod (6) is installed, the lower end is inserted into the arrangement hole (22); The center of the housing positioning groove (9) on the base (1), the center of the arrangement hole (22) on the counterweight support plate (2), and the center of the mounting hole (41) on the pressure plate (4) are aligned.

2. The capping device for an ultra-small discrete device housing according to claim 1, characterized in that: A pressing plate (4) is installed on the upper side of the counterweight support plate (2), and a plurality of evenly arranged through-holes (41) are formed through the pressing plate (4), and the upper end of the counterweight rod (6) is inserted into the mounting hole (41).

3. The capping device for an ultra-small discrete device housing according to claim 2, characterized in that: The counterweight rod (6) comprises a lower plug rod (61), a stopper (62) and an upper plug rod (63); the stopper (62) is arranged between the counterweight support plate (2) and the pressure plate (4).

4. The capping device for an ultra-small discrete device housing according to claim 2, characterized in that: A spring (7) is installed between the counterweight support plate (2) and the pressure plate (4), and the spring (7) is sleeved on the counterweight rod (6).

5. The capping device for an ultra-small discrete device housing according to claim 2, characterized in that: Top connection holes (42) are formed through both sides of the pressure plate (4); a counterweight connection hole (23) is formed on the counterweight support plate (2), and the counterweight connection hole (23) is a threaded hole; a bottom connection hole (12) is formed on the base (1), and the bottom connection hole (12) is a threaded hole; the top connection hole (42) on the pressure plate (4), the counterweight connection hole (23) on the counterweight support plate (2), and the bottom connection hole (12) on the base (1) are aligned; The pressing plate (4) is provided with a clamping screw (5), and the clamping screw (5) passes through the top connecting hole (42), the counterweight connecting hole (23) and the bottom connecting hole (12) to connect the pressing plate (4), the counterweight connecting hole (23) and the base (1) together.

6. The capping device for the housing of an ultra-small discrete device according to claim 5, characterized in that: A limiting sleeve (3) is sleeved on the rod of the clamping screw (5), and the limiting sleeve (3) is arranged between the pressure plate (4) and the counterweight support plate (2).

7. The capping device for an ultra-small discrete device housing according to claim 1, characterized in that: The base (1) is provided with a receiving groove (11), the receiving groove (11) is provided on the upper surface of the base (1), and the housing positioning groove (9) is provided on the receiving groove (11); The counterweight support plate (2) is provided with an arrangement groove (21), the arrangement groove (21) is provided on the lower surface of the counterweight support plate (2), and the arrangement hole (22) is provided on the arrangement groove (21).

8. The capping device for the housing of an ultra-small discrete device according to claim 7, characterized in that: The accommodating groove (11) is a through groove in the horizontal direction; and the arrangement groove (21) is a through groove in the horizontal direction.

9. A capping method based on the capping device of the ultra-small discrete device housing according to any one of claims 1 to 8, characterized in that: It includes steps S1 to S6, each of which is described in detail as follows: Step S1: The cover plate and the ultra-small discrete device housing are sequentially placed upside down in the cover plate positioning groove (8) and the housing positioning groove (9) of the base (1); Step S2: Installing the counterweight rod (6) into the arrangement hole (22) of the counterweight support plate (2); Step S3: putting the spring (7) on the counterweight rod (6); Step S4: installing the pressure plate (4) on the upper end of the counterweight rod (6) equipped with the spring (7); Step S5: Pass the clamping screw (5) through the top connection hole (42) of the spring (7) pressure plate (4), the limiting sleeve (3), the counterweight connection hole (23) of the counterweight support plate (2), and the base (1), and press the pressure plate (4) downward. When the pressure plate (4) is pressed downward, the lower edge of the counterweight rod (6) is moved so that the lower end of the counterweight rod (6) enters the positioning groove (9) of the housing, and the housing is pressed downward to connect the housing and the cover plate together, and then the clamping screw (5) is turned to lock it; Step S6: placing the assembled sealing cap device together with the outer shell and the cover plate in a vacuum sintering furnace and running a vacuum sintering program.

10. The method for capping a housing of an ultra-small discrete device according to claim 9, characterized in that: Before carrying out step S4, the limiting sleeve (3) is installed on the counterweight support plate (2).

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