Parallel seal welding cover plate

Abstract

The utility model relates to the technical field of electronic packaging, in particular to a parallel seal welding cover plate, which comprises a cover plate body, an annular solder sheet and a light window, a through groove is arranged at the center of the cover plate body, an annular buffer structure is convexly arranged on the surface of the cover plate body corresponding to the periphery of the through groove, and an annular limit part is limited between the annular buffer structure and the through groove. The annular solder piece is arranged on the annular limiting part, and the light window is arranged in the through groove and is welded and fixed with the cover plate body through the annular solder piece; a circle of buffer structure is arranged on the periphery of the through groove in a surrounding mode to form the annular buffer structure, so that stress generated in the parallel sealing and welding period can be effectively buffered by the annular buffer structure when being transmitted to the light window from the periphery of the cover plate body, and damage of external force to the light window is reduced; and the annular buffer structure is arranged to protrude out of the surface of the cover plate body, so that the annular solder sheet and the light window can be limited, the area of the overlapping area of the light window and the cover plate body is ensured to be consistent, the stress is more uniform, and the seal welding quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic packaging technical field, especially a parallel seal welding cover plate. BACKGROUND

[0002] Parallel seal welding process is a commonly used process of metal packaging shell / ceramic packaging shell, which is used for airtight sealing protection of bare chips assembled in the shell, and the cavity is completely isolated from the outside after being filled with nitrogen or vacuum and being airtight sealed; in the current parallel seal welding process, the cover plate as a key component directly affects the quality and performance of packaging, and the existing parallel seal welding cover plate design often fails to fully consider the stress change during parallel seal welding, causing the cover plate parallel seal welding cover plate to fail, especially for the cover plate with a light window, stress will be transmitted to the light window through the cover plate, causing cracks in the light window, which is not conducive to the further large-size packaging and high-performance development of electronic equipment.

[0003] Therefore, it is crucial for those skilled in the art to design a parallel seal welding cover plate that can prevent the light window area from being damaged by stress during parallel seal welding. SUMMARY

[0004] The technical problem to be solved by the embodiments of the utility model lies in providing a parallel seal welding cover plate that can prevent the light window area from being damaged by stress during parallel seal welding, to solve the problem of cracks in the light window caused by not considering stress change in the prior art.

[0005] The utility model discloses a parallel seal welding cover plate, and the scheme lies in, including: cover plate body, annular solder piece and light window, the center of cover plate body is set up with through groove, the surface of cover plate body corresponds the annular buffer structure of through groove periphery, the annular buffer structure with through groove between definition has annular limiting portion, the annular solder piece sets up on the annular limiting portion, the light window sets up in through groove, and is welded and fixed with cover plate body through the annular solder piece.

[0006] Optionally, the cover plate body and the annular buffer structure are integrally stamped and formed.

[0007] Optionally, the surface of the cover plate body is plated with a nickel gold layer.

[0008] Optionally, the cover plate body is a metal material.

[0009] Optionally, the cover plate body is an alloy material.

[0010] Optionally, the annular solder piece is a gold-tin solder piece.

[0011] Optionally, both surfaces of the light transmission region of the light window are plated with an anti-reflection film.

[0012] Optionally, the light window is sapphire.

[0013] Optionally, the light window is tempered glass.

[0014] Optionally, the coefficient of thermal expansion of the light window matches the coefficient of thermal expansion of the cover plate body.

[0015] Compared with the prior art, the parallel sealing and welding cover plate provided by the embodiment of the utility model has the beneficial effects that: a parallel sealing and welding cover plate is designed, which comprises a cover plate body, an annular solder sheet and a light window, a through groove is formed in the center of the cover plate body, an annular buffer structure is protruded on the surface of the cover plate body corresponding to the outer periphery of the through groove, an annular limiting part is defined between the annular buffer structure and the through groove, the annular solder sheet is arranged on the annular limiting part, the light window is arranged in the through groove and is welded and fixed with the cover plate body through the annular solder sheet; a ring of buffer structures is arranged around the through groove to form the annular buffer structure, so that when the stress generated during the parallel sealing and welding is transmitted from the periphery of the cover plate body to the light window, the stress can be effectively buffered by the annular buffer structure, thereby reducing the damage of external force to the light window; and the annular buffer structure is arranged protruded on the surface of the cover plate body, which can also well limit the annular solder sheet and the light window, thereby ensuring that the area of the mutual lapping region of the light window and the periphery of the cover plate body is consistent, so that the stress is more uniform, thereby improving the sealing and welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0016] The technical scheme of the utility model will be further described in detail below with reference to the drawings and embodiments, and the drawings are as follows:

[0017] Fig. 1 is the structure diagram of the parallel sealing and welding cover plate provided by the embodiment of the utility model;

[0018] Fig. 2 is the exploded view of the parallel sealing and welding cover plate provided by the embodiment of the utility model;

[0019] Fig. 3 is the partial sectional view of the parallel sealing and welding cover plate provided by the embodiment of the utility model.

[0020] The reference signs in the drawings are as follows:

[0021] 100, cover plate body; 200, annular solder sheet; 300, light window; 110, through groove; 120, annular buffer structure; 130, annular limiting part. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The preferred embodiments of the utility model will be described in detail with reference to the drawings.

[0023] AsFigs. 1 to 3 The utility model provides a parallel seal welding cover plate specific embodiment.

[0024] A parallel seal welding cover plate, referring to Figs. 1 to 3 The parallel seal welding cover plate includes cover plate body 100, annular solder sheet 200 and light window 300, the center of cover plate body 100 is provided with through slot 110, the surface of cover plate body 100 corresponds the outer periphery of through slot 110 and is provided with annular buffer structure 120, annular buffer structure 120 and through slot 110 between the definition has annular limiting portion 130, annular solder sheet 200 is set on annular limiting portion 130, light window 300 is set in through slot 110, and is welded and fixed with cover plate body 100 through annular solder sheet 200.

[0025] Specifically, in parallel seal welding process, the cover plate is very key component, and its design directly influences the quality and performance of packaging, and the traditional parallel seal welding cover plate generally does not have light window, and does not have the light transmission function, and it is difficult to meet the optical requirements of device packaging, in this embodiment, parallel seal welding cover plate includes cover plate body 100 and light window 300, and the middle position of cover plate body 100 is provided with through slot 110 to place light window 300, to meet the light transmission requirements of device packaging, and light window 300 and cover plate body 100 are welded and fixed through solder sheet.

[0026] Further, when the parallel cover plate with light window is set, the stress change during parallel seal welding is often not fully considered, since the parallel seal welding cover plate will bear strong impact during parallel seal welding, the cover plate is easy to age during parallel seal welding, and when the parallel seal welding cover plate receives strong impact, larger stress strain will be generated, and the stress will be directly transmitted to the light window, and the light window is brittle material, and when receiving larger stress strain, cracks will appear, and even breakage or tearing, etc.

[0027] In the embodiment, the solder sheet is arranged as a ring-shaped solder sheet 200, a ring-shaped buffer structure 120 is arranged around the through groove 110, and a ring-shaped limiting portion 130 is defined between the ring-shaped buffer structure 120 and the through groove 110 for placing the ring-shaped solder sheet 200. When the ring-shaped solder sheet 200 is placed on a surface of the cover plate body 100 having the ring-shaped buffer structure 120, the ring-shaped solder sheet 200 can be correspondingly attached to the ring-shaped limiting portion 130. When the light window 300 is placed in the through groove 110, one side of the light window 300 can be welded and fixed to the surface of the cover plate body 100 through the ring-shaped solder sheet 200. When parallel sealing is performed, the stress generated during the parallel sealing can be effectively buffered by the ring-shaped buffer structure 120 when the stress is transmitted from the periphery of the cover plate body 100 to the light window 300, thereby reducing the damage of external force to the light window 300. In addition, the ring-shaped buffer structure 120 is arranged to protrude from the surface of the cover plate body 100, and can also well limit the ring-shaped solder sheet 200 and the light window 300, thereby ensuring that the area of the mutual overlapping region of the light window 300 and the periphery of the cover plate body 100 is consistent, so that the stress is more uniform, thereby improving the sealing quality.

[0028] In one embodiment, referring to Fig. 2 and Fig. 3 , the cover plate body 100 and the ring-shaped buffer structure 120 are integrally stamped and formed. Integrally forming effectively avoids joints and connecting points, improves the strength and durability of the overall structure, so that the overall structure can more evenly disperse stress, and also effectively improves the overall sealing performance.

[0029] In one embodiment, referring to Fig. 2 and Fig. 3 , the ring-shaped buffer structure 120 is a U-shaped elastic structure, which can effectively buffer the stress transmitted from the periphery of the cover plate body 100 to the light window 300 after being stressed, thereby reducing the damage of external force to the light window 300, and the U-shaped structure can limit the light window 300 and the ring-shaped solder sheet 200.

[0030] In one embodiment, the cover plate body 100 is made of an alloy or other metal material, the thickness of the cover plate body 100 is at least 0.1 mm, and the surface of the cover plate body 100 is plated with a nickel-gold layer to increase the welding stability with the light window 300. Further, the ring-shaped solder sheet 200 is a gold-tin solder sheet, which is used to weld the light window 300 and the cover plate body 100, to promote the filling of gaps and welding between the light window 300 and the cover plate body 100, so that the air tightness is better.

[0031] In one of the embodiments, the two surfaces of the light-transmitting area of the light window 300 are coated with anti-reflection films; the anti-reflection film is an optical film used to reduce surface reflection to increase light transmission, and can also reduce stray light to improve imaging clarity and contrast, and has anti-scratching, anti-fouling and waterproof functions.

[0032] In one of the embodiments, the light window 300 is sapphire or tempered glass; sapphire has high hardness, wear resistance, good chemical stability and high temperature resistance, and is suitable for long-term use; sapphire has high light transmission, which can ensure efficient light transmission; tempered glass has high heat shock resistance and is not easy to break during parallel sealing.

[0033] In one of the embodiments, the thermal expansion coefficient of the light window 300 matches the thermal expansion coefficient of the cover plate body 100; by setting the thermal expansion coefficient of the light window 300 to be the same as or similar to the thermal expansion coefficient of the cover plate body 100, the defects of cracking and poor air tightness of the light window 300 during sealing can be effectively avoided.

[0034] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; for those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some of the technical features can be replaced by equivalents; all these modifications and replacements should belong to the protection scope of the claims of the present application.

Claims

1. A parallel seal cover panel, characterized by, The application relates to a cover plate body, an annular solder sheet and a light window, a through groove is formed in the center of the cover plate body, an annular buffer structure is protruded on the surface of the cover plate body corresponding to the outer periphery of the through groove, an annular limiting part is defined between the annular buffer structure and the through groove, the annular solder sheet is arranged on the annular limiting part, and the light window is arranged in the through groove and is welded and fixed with the cover plate body through the annular solder sheet. The cover plate body and the annular buffer structure are integrally punched and formed.

2. The parallel seal cover plate of claim 1, wherein, The surface of the cover plate body is plated with a nickel-gold layer.

3. The parallel seal cover plate of claim 1, wherein, The cover plate body is made of metal material.

4. The parallel seal cover panel of claim 1, wherein, The cover plate body is made of alloy material.

5. The parallel seal cover panel of claim 1, wherein, The annular solder sheet is a gold-tin solder sheet.

6. The parallel seal cover panel of claim 1, wherein, The two surfaces of the light-transmitting area of the light window are plated with anti-reflection films.

7. The parallel seal cover panel of claim 1, wherein, The light window is sapphire.

8. The parallel seal cover panel of claim 1, wherein, The light window is tempered glass.

9. The parallel seal lidding panel of claim 1, wherein, The thermal expansion coefficient of the light window matches the thermal expansion coefficient of the cover plate body.

10. The parallel seal cover panel of claim 1, wherein, ​

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