Ceramic tube shell structure for optical communication

Abstract

The utility model provides a ceramic tube shell structure for optical communication, which relates to the field of chip packaging and comprises a wall body, a ceramic body and a bottom plate, the wall body is provided with a notch and an optical window support, the optical window support is provided with an optical window, the ceramic body enters the notch and extends outwards relative to the bottom of the wall body, and the outwards-extending part is used for being connected with the bottom plate. According to the optical communication ceramic tube shell provided by the utility model, the first metalized area is welded in the first welding area, the second metalized area is welded in the second welding area, the third metalized area is welded in the third welding area, and the bottom plate is welded at the bottom of the wall body, so that the problem that in a traditional structure, the structure is damaged is solved; the height of the ceramic is limited by the wall welding surface and the bottom plate welding surface, so that the problem of low yield caused by inconsistent ceramic height due to different shrinkage rates of different batches of ceramic is solved, and a forward popularization effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of chip packaging, in particular to a ceramic tube shell structure for optical communication. Background Art

[0002] Optical communication ceramic tube shells play an indispensable role in the field of optical communication due to their excellent physical and chemical properties, providing a solid guarantee for the stable operation of optical communication equipment. Compared with plastic package tube shells and glass package tube shells, optical communication ceramic tube shells have excellent packaging density and electrical and thermal properties, and are suitable for applications in high-speed AD / DA, DDS and other circuits. Existing optical communication ceramic tube shells are generally made of Figure 1 The structure shown consists of a wall, light window, light window bracket, ceramic block, and base plate. Some ceramic tubes and cases also have leads welded to the ceramic block. During the production process, the ceramic is typically welded between the wall and base plate. However, this structure requires the ceramic shell to be perfectly aligned with the wall cavity height, otherwise there is a risk of air leakage and weld seams. Therefore, this traditional structure requires a high tolerance for the wall cavity height and a high height requirement for the ceramic after sintering. This results in low product yield and a sharp increase in processing costs. Utility Model Content

[0003] The purpose of the present utility model is to provide a ceramic tube shell structure for optical communication to solve the above technical problems.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A ceramic tube shell structure for optical communication includes a wall, a ceramic body and a bottom plate. The wall has a gap, a light window bracket, and a light window. The ceramic body enters the gap and extends outward relative to the bottom of the wall. The outward extending portion is used to connect to the bottom plate.

[0006] Furthermore, the wall, the ceramic body and the bottom plate are assembled by welding.

[0007] Furthermore, the wall has a first metallized area, a second metallized area, and a third metallized area, the notch has a first welding area and a second welding area, and the bottom plate has a third welding area;

[0008] The first metallized region is welded to the first welding region, the second metallized region is welded to the second welding region, and the third metallized region is welded to the third welding region.

[0009] Furthermore, the first metallized region, the second metallized region and the third metallized region are nickel-plated on the surface of tungsten slurry, and the thickness of the nickel layer is 0.1-7 μm.

[0010] Furthermore, the bottom plate is welded to the bottom of the wall, wherein the bottom plate is pre-plated with nickel by chemical plating or electroplating before brazing, and the thickness of the nickel layer is 0.05 to 5 μm.

[0011] Furthermore, the welding surface of the bottom plate and the wall is provided with a silver-copper welding piece, which connects the bottom plate and the wall under pressure in a brazing furnace, and the temperature of the brazing furnace is controlled at 750-850°C.

[0012] Furthermore, the material of the base plate is tungsten copper alloy, preferably W30Cu70, and the material of the wall is Kovar metal, which is preferably 4J29 material. It should be noted that if the heat dissipation performance of the base plate is not required to be high, the same Kovar alloy or stainless steel material as the wall can also be used.

[0013] Furthermore, after the wall and the base plate are welded, a clamp is used to assemble and fix the ceramic body to the wall and base plate assembly. Subsequently, a silver-copper solder sheet with a thickness of 0.05 to 0.5 mm is placed between the first metallized area and the first welding area. The second metallized area and the second welding area are welded together based on the solder flowing during welding between the first metallized area and the first welding area. Of course, a clamp can also be used to add welding wire on the sides of the second metallized area and the second welding area to supplement the solder.

[0014] The beneficial effects of the utility model are:

[0015] The optical communication ceramic tube shell proposed by the utility model avoids the limitation of ceramic height caused by the wall welding surface and the bottom plate welding surface in the traditional structure by welding the first metallized area to the first welding area, the second metallized area to the second welding area, the third metallized area to the third welding area, and the bottom plate to the bottom of the wall, thereby solving the problem of low yield caused by inconsistent ceramic height due to different shrinkage rates of different batches of ceramics, and has a positive promotion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an existing optical communication ceramic shell;

[0017] Figure 2 This is a schematic diagram of a ceramic shell structure for optical communications;

[0018] Figure 3 for Figure 2 An exploded view of a portion of the structure shown;

[0019] Figure 4 for Figure 3 Schematic diagram of the structure of the ceramic body and the bottom plate;

[0020] Figure 5 for Figure 3Structure diagram of the structure shown from another perspective;

[0021] Reference numerals: 1, wall body; 2, ceramic body; 3, light window support; 4, light window; 5, bottom plate; 6, first metallization area; 7, second metallization area; 8, third metallization area; 9, notch; 10, first soldering area; 11, second soldering area; 12, third soldering area. DETAILED DESCRIPTION

[0022] For the purpose of facilitating the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application herein is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0024] The specific embodiments of the present application will be described below with reference to the accompanying drawings.

[0025] Embodiment 1

[0026] In this embodiment, a ceramic tube shell structure for optical communication is proposed, please refer to Figure 1 and Figures 2-5 The ceramic tube shell structure for optical communication includes a wall body 1, a ceramic body 2 and a bottom plate 5. The wall body 1 has a notch 9. The wall body 1 has a light window support 3 on the side away from the notch 9. The light window support 3 is integrally formed with the wall body 1. The light window support 3 also has Figure 2 and Figure 3 The light window 4 shown.

[0027] The material of the bottom plate 5 is W30Cu70. The material of the wall body 1 is 4J29 material. It should be noted that if the heat dissipation performance requirement of the bottom plate 5 is not high, the same Kovar alloy or stainless steel material as the wall body 1 can also be used.

[0028] Please refer to Figure 2 and Figure 3 The ceramic body 2 enters the notch 9 and extends outward relative to the bottom of the wall body 1. The outwardly extending part is used to connect the bottom plate 5. It should be noted that the wall body 1, the ceramic body 2 and the bottom plate 5 are assembled by welding.

[0029] Please refer to Figures 3-5, the ceramic body 2 has a metal welding area, the wall body 1 and the bottom plate 5 have welding areas, specifically, the ceramic body 2 has Figure 3 the first metalized area 6, the second metalized area 7 and the third metalized area 8 shown in the figure, the wall body 1 has Figure 4 the first welding area 10 and the second welding area 11 shown in the figure, and the bottom plate 5 has the third welding area 12.

[0030] Please refer to Figures 3-5 the first metalized area 6 is welded in the first welding area 10, the second metalized area 7 is welded in the second welding area 11, and the third metalized area 8 is welded in the third welding area 12.

[0031] It is additionally explained that the first metalized area 6, the second metalized area 7 and the third metalized area 8 are surface plated with tungsten paste and nickel, and the thickness of the nickel layer is 0.1-7 μm.

[0032] In the embodiment, the welding process of the wall body 1, the ceramic body 2 and the bottom plate 5 is as follows: specifically, the wall body 1 is welded with the bottom plate 5, before welding, the bottom plate 5 is pre-plated with nickel by any of chemical plating or electroplating, and the thickness of the nickel layer is 0.05-5 μm, the welding surface of the bottom plate 5 and the wall body 1 has silver copper welding pieces, the silver copper welding pieces combine and connect the bottom plate 5 and the wall body 1 in a brazing furnace under the action of pressure, and the furnace temperature of the brazing furnace is controlled at 750-850 ℃.

[0033] After the wall body 1 is welded with the bottom plate 5, the ceramic body 2 is assembled and fixed with the combined part of the wall body 1 and the bottom plate 5 by using a clamp, then, silver copper welding pieces are placed between the first metalized area 6 and the first welding area 10, the thickness of the silver copper welding pieces is 0.05-0.5 mm, the second metalized area 7 and the second welding area 11 are welded together based on the solder flowing in the welding between the first metalized area 6 and the first welding area 10, of course, welding wires can also be added on the side of the second metalized area 7 and the second welding area 11 to supplement the solder.

[0034] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the range disclosed in the specification.

[0035] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled persons in the art, on the premise of not departing from the utility model concept, a number of deformations and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A ceramic tube shell structure for optical communication, comprising a wall, a ceramic body, and a bottom plate, wherein the wall has a notch, and is characterized in that: The ceramic body enters the gap and extends outward relative to the bottom of the wall body, and the outward extending part is used for connecting the bottom plate; The wall body has a first metallized area, a second metallized area and a third metallized area, the gap has a first welding area and a second welding area, and the bottom plate has a third welding area; The first metallized area is welded to the first welding area, the second metallized area is welded to the second welding area, and the third metallized area is welded to the third welding area.

2. The ceramic package structure for optical communication according to claim 1, wherein: The wall body, the ceramic body and the bottom plate are welded and assembled.

3. The ceramic package structure for optical communication according to claim 1, wherein: The first metallized area, the second metallized area and the third metallized area are surface plated with nickel tungsten paste, and the thickness of the nickel layer is 0.1-7μm.

4. The ceramic package structure for optical communication according to claim 1, wherein: The bottom plate is welded to the bottom of the wall body, wherein the bottom plate is pre-plated with nickel by any one of chemical plating or electroplating before brazing, and the thickness of the nickel layer is 0.05-5μm.

5. The ceramic package structure for optical communication according to claim 4, wherein: The welding surface of the bottom plate and the wall body has a silver copper welding sheet, and the silver copper welding sheet combines and connects the bottom plate and the wall body in the brazing furnace under the action of pressure.

6. The ceramic package structure for optical communication according to claim 4, wherein: The material of the bottom plate is tungsten copper alloy.

7. The ceramic package structure for optical communication according to claim 4, wherein: The material of the wall body is Kovar metal.

8. The ceramic package structure for optical communication according to claim 1, wherein: The wall body has a light window support, and the light window support has a light window.

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