Optical communication tube shell

Abstract

The optical communication tube shell comprises a bottom plate, a supporting frame body, a surrounding frame and an optical window, the supporting frame body is in a hollow thin-wall cuboid shape with openings in the upper portion and the lower portion, the supporting frame body is connected to the bottom plate in a sealed mode, a cavity for containing an optical semiconductor element is defined by the inner wall of the supporting frame body and the top face of the bottom plate, and the surrounding frame is connected to the upper end face of the supporting frame body. The light window is located in a through hole formed in the inner wall of the supporting frame body. The supporting frame body is the integrated ceramic piece and is manufactured in the mode that the raw ceramic casting sheets are stacked and sintered, in the follow-up gold plating process, the situation that gold materials are consumed by the inner wall and the outer wall of the supporting frame body can be avoided, the gold plating cost is about half of that in the prior art, the using amount of kovar alloy is greatly reduced, and in addition, the ceramic materials are low in cost and easy to obtain; in addition, due to the integrated structure, the follow-up brazing difficulty can be reduced, the number of brazing seams can be reduced, accordingly, consumption of brazing materials is reduced, the brazing qualification rate is increased, and the total cost can be reduced to one third of the total cost in the prior art.

Description

Technical Field

[0001] The invention belongs to the technical field of optical communication, and in particular relates to a low-cost and high-cost-performance optical communication tube shell. Background Art

[0002] Optical communication tube shell is a component used to encapsulate optical semiconductor elements and is often used in photoelectric conversion. Existing optical communication tube shells usually include components such as a substrate, a frame, a cover, and a light window bracket. For example, Chinese patent CN116845113A discloses such a packaging tube shell. In order to ensure strength and improve wear resistance and corrosion resistance, the substrate, frame and light window bracket are made of Kovar alloy. Due to the large surface area of ​​the frame, such a structure will consume more gold material during subsequent gold plating. Against the background of rising gold prices, this consumption will greatly increase the material cost. At the same time, the price of Kovar alloy itself is also high, resulting in high prices and low cost performance for such optical communication tube shells. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a low-cost, high-cost-performance optical communication housing.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is that the optical communication shell comprises:

[0005] Base plate;

[0006] A support frame, the support frame is in the shape of a hollow thin-walled rectangular parallelepiped with openings at the top and bottom, the support frame is sealed and connected to the bottom plate, and the inner wall of the support frame and the top surface of the bottom plate form a cavity for accommodating the optical semiconductor element;

[0007] A surrounding frame connected to the upper end surface of the supporting frame;

[0008] A light window, wherein the light window is located in a through hole formed on an inner wall of the support frame;

[0009] The support frame is an integrated ceramic part, and is made by stacking and sintering green ceramic cast sheets.

[0010] Preferably, a step structure for arranging an electrical signal transmission component is provided on the inner wall of the support frame, and the step structure is located on the opposite side of the mounting hole.

[0011] Preferably, the wall thickness of the support frame is less than or equal to 3 mm.

[0012] Further preferably, the wall thickness of the support frame is 1 to 3 mm.

[0013] Preferably, the upper and lower end surfaces of the support frame are metallized by printing tungsten paste so as to be connected to the surrounding frame and the base plate by brazing.

[0014] Preferably, the bottom plate is a heat sink bottom plate.

[0015] Preferably, the bottom plate is a ceramic piece fired integrally with the supporting frame.

[0016] Preferably, the optical communication tube shell further comprises a cylindrical light window bracket, one end of which is inserted into the through hole for embedding the light window, and the other end of which extends outwards to hang outside the supporting frame.

[0017] Further preferably, the end of the light window bracket inserted into the through hole is provided with a countersunk hole for accommodating the light window.

[0018] Further preferably, the outer circumferential surface of the light window is sealedly connected to the inner wall surface of the countersunk hole, and the outer wall of the light window bracket is sealedly connected to the inner wall of the through hole.

[0019] Preferably, an outer end portion of the light window bracket is provided with an outwardly protruding annular flange, and the annular flange is in contact with and sealingly connected to the outer wall of the supporting frame.

[0020] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0021] The optical communication tube shell provided by the present invention comprises a base plate, a support frame, a surrounding frame, and a light window. The support frame is in the shape of a hollow thin-walled rectangular parallelepiped with openings at the top and bottom. The support frame is sealed and connected to the base plate. The inner wall of the support frame and the top surface of the base plate form a cavity for accommodating optical semiconductor elements. The surrounding frame is connected to the upper end surface of the support frame, and the light window is located in a through hole opened on the inner wall of the support frame. By making the support frame an integrated ceramic part, it is made by stacking and sintering raw ceramic cast sheets. During subsequent gold plating, the consumption of gold material on the inner and outer walls of the support frame can be avoided. The gold plating cost is about half of that in the prior art, and the use of Kovar alloy is greatly reduced. In addition, the ceramic material itself is cheap and easy to obtain, so the material cost is also greatly reduced. In addition, due to the integrated structure, the difficulty of subsequent brazing can be reduced, the number of brazing seams can be reduced, thereby reducing the consumption of brazing materials and improving the brazing qualification rate. The total cost can be reduced to one-third of the prior art, and it has broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the first embodiment of the present invention.

[0023] Figure 2 yes Figure 1 Schematic top view of .

[0024] Figure 3 yes Figure 2 Schematic cross-sectional view along the AA direction.

[0025] Figure 4 yes Figure 1 Assembly breakdown diagram of .

[0026] Figure 5 It is a cross-sectional schematic diagram of the second embodiment of the present invention.

[0027] Among them: 10. bottom plate; 20. supporting frame; 21. through hole; 22. step structure; 30. surrounding frame; 40. light window; 50. light window bracket; 51. countersunk hole; 52. annular flange; 60. cavity. DETAILED DESCRIPTION

[0028] Embodiment 1

[0029] like Figures 1 to 4 As shown, the optical communication tube shell provided by the present invention comprises: a bottom plate 10, a supporting frame 20, a surrounding frame 30, a light window 40, and a light window bracket 50, wherein the bottom plate 10 is a heat sink bottom plate, the supporting frame 20 is in the shape of a hollow thin-walled rectangular parallelepiped with openings at the top and bottom, the supporting frame 20 is sealed and connected to the bottom plate 10, and the inner wall of the supporting frame 20 and the top surface of the bottom plate 10 form a cavity 60 for accommodating optical semiconductor elements; the surrounding frame 30 is connected to the upper end surface of the supporting frame 20; the light window 40 is located in the through hole 21 opened on the inner wall of the supporting frame 20; the light window bracket 50 It is cylindrical, and one end of the light window bracket 50 is inserted in the through hole 21 for embedding the light window 40, and the other end extends outward and hangs on the outside of the support frame 20. In order to facilitate the embedding of the light window 40, the end of the light window bracket 50 inserted in the through hole 21 is provided with a countersunk hole 51 for accommodating the light window 40, and the outer circumferential surface of the light window 40 is sealedly connected to the inner wall surface of the countersunk hole 51, and the outer wall of the light window bracket 50 is sealedly connected to the inner wall of the through hole 21. The support frame 20 is an integrated ceramic part, and the support frame 20 is made by stacking and sintering green porcelain cast sheets.

[0030] The advantages of this setting are:

[0031] 1. During subsequent gold plating, due to the ceramic properties of the support frame, the inner and outer walls do not consume gold material, which can reduce the gold plating cost. The gold plating cost of this embodiment is about half of that of the prior art (CN116845113A).

[0032] 2. Using ceramic materials as the support frame can greatly reduce the use of Kovar alloy. In addition, ceramic materials themselves are cheap and easy to obtain, which greatly reduces material costs.

[0033] 3. By using an integrated ceramic part as a supporting frame, the difficulty of subsequent brazing can be reduced, the number of brazing seams can be reduced, thereby reducing the consumption of brazing materials and improving the brazing qualification rate. The total cost can be reduced to one-third of the existing technology (CN116845113A), which has broad market prospects.

[0034] 4. The support frame is made by stacking and sintering green porcelain cast sheets, which can keep its flatness within the set range and meet the needs of optical communication tube shells.

[0035] In an embodiment, the support frame is made by stacking and sintering green porcelain cast sheets, which includes the following steps:

[0036] a. Cut the support frame equidistantly in the up and down directions to obtain a monolithic shape of the support frame;

[0037] b. Casting a raw ceramic sheet in a monolithic shape by a casting device;

[0038] c. The obtained green ceramic sheets are stacked and pressed by isostatic pressing equipment to obtain an embryo;

[0039] d. Send the embryo body into a sintering furnace for sintering to obtain a support frame (integrated ceramic part).

[0040] Preferably, after stacking in step c, the method further includes placing silica gel in the middle cavity of the green ceramic sheets, wherein the silica gel is soft silica gel, preferably 0 degree soft silica gel, to ensure that the flatness of the inner wall of the embryo body after pressing meets the requirements.

[0041] In this embodiment, a step structure 22 for setting an electrical signal transmission component is provided on the inner wall of the support frame 20, and the step structure 22 is located on the opposite side of the mounting hole 21. Furthermore, the wall thickness of the support frame 20 is generally preferably 1 to 3 mm, and the area where the wall thickness is located does not include the part where the step structure 22 is set, nor does it include the part on the outer wall of the support frame 20 that corresponds to the step structure 22 and extends outward.

[0042] In this embodiment, the upper and lower end surfaces of the support frame 20 are metallized by printing tungsten paste so as to be welded to the surrounding frame 30 and the bottom plate 10 .

[0043] To facilitate the insertion of the light window bracket 50 , in the present embodiment, the outer end of the light window bracket 50 is provided with an outwardly protruding annular flange 52 , and the annular flange 52 is in contact with and sealed against the outer wall of the supporting frame 20 .

[0044] Embodiment 2

[0045] like Figure 5 As shown, the second embodiment is substantially the same as the first embodiment, except that, in the second embodiment, the base plate 10 is a ceramic component fired integrally with the support frame 20 .

[0046] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical communication housing, comprising: Base plate; A support frame, the support frame is in the shape of a hollow thin-walled rectangular parallelepiped with openings at the top and bottom, the support frame is sealed and connected to the bottom plate, and the inner wall of the support frame and the top surface of the bottom plate form a cavity for accommodating the optical semiconductor element; A surrounding frame connected to the upper end surface of the supporting frame; A light window, wherein the light window is located in a through hole formed on the inner wall of the support frame; Features: The support frame is an integrated ceramic part, and is made by stacking and sintering green ceramic cast sheets.

2. The optical communication housing according to claim 1, characterized in that: A step structure for arranging an electrical signal transmission component is provided on the inner wall of the support frame, and the step structure is located on the opposite side of the mounting hole.

3. The optical communication housing according to claim 1, characterized in that: The wall thickness of the support frame is less than or equal to 3 mm.

4. The optical communication housing according to claim 1, characterized in that: The upper and lower end surfaces of the support frame are metallized by printing tungsten paste so as to be welded and connected with the surrounding frame and the bottom plate.

5. The optical communication housing according to claim 1, characterized in that: The bottom plate is a heat sink bottom plate.

6. The optical communication housing according to claim 1, characterized in that: The bottom plate is a ceramic piece fired integrally with the supporting frame.

7. The optical communication housing according to claim 1, characterized in that: The optical communication tube shell also includes a cylindrical light window bracket, one end of which is inserted into the through hole for embedding the light window, and the other end extends outward and hangs on the outside of the supporting frame.

8. The optical communication housing according to claim 7, characterized in that: The end of the light window bracket inserted in the through hole is provided with a countersunk hole for accommodating the light window.

9. The optical communication housing according to claim 8, characterized in that: The outer circumferential surface of the light window is sealedly connected to the inner wall surface of the countersunk hole, and the outer wall of the light window bracket is sealedly connected to the inner wall of the through hole.

10. The optical communication housing according to claim 1, characterized in that: An outwardly protruding annular flange is provided at the outer end of the light window bracket, and the annular flange is in contact with and sealedly connected to the outer wall of the support frame.

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