Novel single-channel packaging structure and novel multi-channel packaging structure of optical relay

Abstract

The utility model provides a novel single-channel packaging structure of an optical relay and a novel multi-channel packaging structure of the optical relay, and the novel packaging structure comprises a circular tube, a first frame, a second frame, an optical coupler device, a control chip and plastic packaging glue, and the first frame and the second frame are respectively arranged at the two ends of the circular tube. A light source chip and a light receiving chip in the optocoupler are arranged at the upper end and the lower end in the circular tube respectively, the light source chip in the optocoupler is connected with the first frame, the light receiving chip in the optocoupler is connected with the second frame, and the control chip is electrically connected with the light receiving chip through the second frame. The optocoupler device is composed of a light source signal sealed in a circular tube, a light receiving chip and a free space. The plastic packaging adhesive wraps the circular tube, the first frame, the second frame and the control chip. Thus, the light source and the light receiving chip in the optocoupler are sealed in the circular tube, the sealing structure improves the reliability of the optical relay, the number of packaging materials is smaller, the process is simpler, the cost is reduced, and industrialization of the optical relay is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of device packaging, specifically relates to a single channel novel packaging structure of optical relay and its multichannel novel packaging structure. BACKGROUND

[0002] The optical relay has electrical isolation, signal transmission, isolation protection, signal matching and switch control functions, and the packaging of the optocoupler device seriously affects the performance of the optical relay. In the related art, the packaging of the conventional optical relay includes metal / ceramic packaging (full gold packaging) and full plastic packaging. The full gold packaging optical relay is widely used in high-end markets with high reliability requirements, such as the automotive field and the aerospace field. During the operation of the vehicle or the aircraft, heat, vibration or mechanical impact is generated on the packaged optical relay. Under the influence of temperature, pressure and vibration, the airtightness and performance of the optical relay are adversely affected, and the cost of the full gold packaging is high, which seriously limits the application of the full gold packaging in the middle and low end fields. The full plastic packaging optical relay is applied to the middle and low end markets, and the cost is low, but the light-transmitting organic material in the optical coupling light path greatly limits the reliability and service life of the optical relay.

[0003] Therefore, how to provide a packaging structure of an optical relay with high reliability and low cost is a technical problem to be solved at present. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the utility model provides a single channel novel packaging structure of an optical relay and a multichannel novel packaging structure thereof to solve at least one of the above technical problems.

[0005] To achieve the above-mentioned purposes and other related purposes, the technical scheme provided by the present application is as follows.

[0006] In a first aspect, the present application provides a single channel novel packaging structure of an optical relay, which comprises a circular tube, a first frame, a second frame, an optocoupler device, a control chip and plastic sealing glue. The first frame and the second frame respectively close the two ends of the circular tube. The light source chip and the light receiving chip in the optocoupler device are arranged at the upper and lower ends in the circular tube. The light source chip in the optocoupler device is connected with the first frame, the light receiving chip in the optocoupler device is connected with the second frame, the control chip is connected with the second frame, and the plastic sealing glue wraps the circular tube, the first frame, the second frame and the control chip.

[0007] In an embodiment of the utility model, a first glue layer is arranged between the light source chip in the optocoupler device and the first frame, and a second glue layer is arranged between the light receiving chip in the optocoupler device and the second frame.

[0008] In an embodiment of the utility model, the first end of the circular tube and the first frame are provided with a third glue layer, the second end of the circular tube and the second frame are provided with the third glue layer, the control chip and the second frame are provided with a fourth glue layer, wherein the first end of the circular tube is provided with the light source chip, and the second end of the circular tube is provided with the light receiving chip.

[0009] In an embodiment of the utility model, the inner diameter of the first end of the circular tube is equal to the inner diameter of the second end of the circular tube.

[0010] In an embodiment of the utility model, the inner diameter of the circular tube corresponding to the light source chip in the optocoupler device is less than the inner diameter of the light receiving chip, and the inner diameter of the circular tube increases from one end provided with the light source chip to one end provided with the light receiving chip.

[0011] In an embodiment of the utility model, the circular tube is a free space of one of vacuum, air and nitrogen.

[0012] In a second aspect, the application further provides a multi-channel novel packaging structure of an optical relay, which comprises N circular tubes, a first frame, a second frame, N optocoupler devices, 2N control chips and plastic sealing glue, the first frame and the second frame respectively close two ends of the N circular tubes, light source chips and light receiving chips in the N optocoupler devices are respectively arranged at upper and lower ends in the N circular tubes, the light source chips in the N optocoupler devices are connected with the first frame, the light receiving chips in the N optocoupler devices are connected with the second frame, the 2N control chips are connected with the second frame, and the plastic sealing glue wraps the N circular tubes, the N first frames, the N second frames and the 2N control chips, wherein N is greater than or equal to 2.

[0013] The application provides a single-channel novel packaging structure of an optical relay and a multi-channel novel packaging structure of the optical relay.

[0014] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory and are not restrictive of the application. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application. It is readily apparent to one of ordinary skill in the art that the accompanying drawings only illustrate some embodiments of the application and other drawings can be obtained from these drawings without any creative effort. In the drawings:

[0016] Figure 1 is a cross-sectional view of a full-plastic packaging process of an optical relay in the prior art;

[0017] Figure 2 is an appearance view of an optical relay after transparent white glue plastic packaging in the full-plastic packaging process in the prior art;

[0018] Figure 3 is an appearance view of an optical relay after black glue plastic packaging in the full-plastic packaging process in the prior art;

[0019] Figure 4 is a cross-sectional view of a single-channel novel packaging structure of an optical relay according to an exemplary embodiment of the application;

[0020] Figure 5 is a side packaging view of the single-channel novel packaging structure of the optical relay according to the exemplary embodiment of the application;

[0021] Figure 6is a cross section schematic view of a single channel novel packaging structure of the optical relay when the inner diameters of two ends of the circular tube are not equal according to an example embodiment of the present utility model;

[0022] Figure 7 is a schematic view of a three-dimensional structure of a double channel optical relay according to an example embodiment of the present utility model;

[0023] Reference signs: 410-circular tube, 420-first frame, 430-second frame, 440-optical coupling device, 441-light source chip in the optical coupling device, 442-light receiving chip in the optical coupling device, 450-plastic sealing glue, 460-control chip. DETAILED DESCRIPTION

[0024] The implementation of the present utility model will be described below with reference to the drawings and preferred embodiments, and other advantages and effects of the present utility model can be easily understood by those skilled in the art from the disclosure in the specification. The present utility model can also be implemented or applied in other different specific embodiments, and various modifications or changes can be made based on different viewpoints and applications without departing from the spirit of the present utility model. It should be understood that the preferred embodiments are only for illustrating the present utility model, but not for limiting the protection scope of the present utility model.

[0025] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner, and only the components related to the present utility model are shown in the diagrams, not the number, shape and size of the components when actually implemented. The actual implementation of each component may be arbitrarily changed in shape, number and proportion, and the layout pattern of the components may also be more complex.

[0026] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present utility model, however, it is obvious to those skilled in the art that the embodiments of the present utility model can be implemented without these specific details, and in other embodiments, the known structures and devices are shown in the form of block diagrams rather than in the form of details, to avoid making the embodiments of the present utility model difficult to understand.

[0027] The insulating UV glue is a kind of glue that can be quickly cured under ultraviolet irradiation.

[0028] The optical relay has the functions of electrical isolation, signal transmission, isolation protection, signal matching and switch control, and the packaging of the optical relay will greatly affect the performance of the optical relay. In the related technology, such as Figure 1 In order to fully plastic seal the cross section view of the optical relay, the light source and the light receiving chip of the optical coupling device are fixed and precisely optically aligned by the upper and lower frames, such as Figure 2As shown, the two photorelay channels are grouped together, and the photorelays are first encapsulated with translucent white adhesive, as shown. Figure 3 As shown, then seal with black plastic adhesive. Figure 2 The encapsulated optocoupler undergoes a second molding process to obtain a fully molded optocoupler. Fully molded optocouplers are used in the low-to-mid-end market due to their low cost; however, the presence of transparent organic materials in the optocoupler's optical path significantly limits their reliability and lifespan. Alternatively, optocouplers can be fully encapsulated in gold. Fully gold-encapsulated optocouplers are widely used in high-reliability markets, such as the automotive and aerospace industries. During vehicle or aircraft operation, the encapsulated optocoupler is subjected to heat, vibration, or mechanical shock. These factors negatively impact the optocoupler's airtightness and performance, and the high cost of fully gold-encapsulated optocouplers severely limits their application in the low-to-mid-end market.

[0029] In summary, currently packaged opto-relays suffer from limitations in performance or high cost, resulting in a narrow range of applications.

[0030] To solve the above problems, such as Figure 4 and Figure 5 As shown, this application provides a novel single-channel packaging structure for an optical relay. The packaging structure includes a cylindrical tube 410, a first frame 420, a second frame 430, an optocoupler 440, a molding compound 450, and a control chip 460. The first frame 420 and the second frame 430 respectively enclose the two ends of the cylindrical tube 410. A light source chip 441 and a light receiver chip 442 in the optocoupler 440 are respectively disposed at the upper and lower ends inside the cylindrical tube 410. The light source chip 441 in the optocoupler 440 is connected to the first frame 420, and the light receiver chip 442 in the optocoupler 440 is connected to the second frame 430. The control chip 460 is connected to the second frame 420. The molding compound 450 encapsulates the cylindrical tube 410, the first frame 420, the second frame 430, and the control chip 460. The first frame 420 and the second frame 430 can be made of copper, and the cylindrical tube 410 can be made of ceramic.

[0031] It should be noted that, as Figure 5As shown, the side packaging diagram of the single-channel new packaging structure of the optical relay, the light source chip 441 and the light receiving chip 442 in the optocoupler device are packaged by the circular tube 410, the light source chip 441 in the optocoupler device is connected with the first frame 420, the light receiving chip 442 in the optocoupler device is connected with the second frame 430, the first frame 420 and the second frame 430 provide mounting and positioning for the light source chip 441 and the light receiving chip 442 in the optocoupler device, the circular tube 410 provides support and precise optical alignment for the optocoupler device 440, and the outer side of the circular tube 410 and part of the first frame 420 and part of the second frame 430 are plastic encapsulated by the plastic encapsulating glue 450. Among them, the plastic encapsulating glue 450 can be light-transmitting glue material or black glue, Figure 4 The planar view of the planing surface is obtained by cutting along the position of the dashed line. Figure 5

[0032] Specifically, as shown in Figure 5 and Figure 7 , the three-dimensional diagram of the two-channel optical relay is shown, Figure 7 The control chip 460 is used to feedback the working state of the optocoupler device 440, the light receiving chip 442 and the second frame 430 are electrically connected by gold wires, and the control chip 460 and the second frame 430 are electrically connected by gold wires, so that the control chip 460 and the light receiving chip 442 are electrically connected, so that the control chip 460 feeds back the on-off state of the optocoupler device 440 to other external devices, wherein the control chip 460 can be a MOS chip (Metal-Oxide-Semiconductor Field-Effect Transistor).

[0033] Specifically, as shown in Figure 5 , the light source chip 441 in the optocoupler device is supported and fixed by the first frame 420, the light receiving chip 442 in the optocoupler device is supported and fixed by the second frame 430, and the circular tube 410 is arranged between the first frame 420 and the second frame 430. The length of the circular tube 410 is determined by the preset light coupling degree of the optocoupler device 440.

[0034] In order to enhance the sealing performance of the optocoupler device, a first glue layer (conductive glue) is arranged between the light source chip 441 of the optocoupler device 440 and the first frame 420, and a second glue layer (insulating glue) is arranged between the light receiving chip 442 of the optocoupler device 440 and the second frame 440; so that the circular tube 410 is in a sealed state.

[0035] ​In detail, the first end of the circular tube 410 and the first frame 420 are provided with a third glue layer (insulating UV glue), the second end of the circular tube 410 and the second frame 430 are provided with a third glue layer (insulating UV glue), the control chip 460 and the second frame 430 are provided with a fourth glue layer (conductive glue), wherein the first end of the circular tube 410 is provided with a light source chip 441, and the second end of the circular tube 410 is provided with a light receiving chip 442.

[0036] It should be noted that the first glue layer and the fourth glue layer can be one of epoxy resin, acrylate resin, polyurethane, etc.; the second glue layer can be one of silicone glue, epoxy resin glue, polyurethane glue, and acrylic glue; and the third glue layer can be one of ultraviolet curing glue, acrylic UV glue, and polyurethane UV glue.

[0037] It should be noted that the light source chip 441 and the light receiving chip 442 of the optical coupling device 440 are arranged at the two ends of the circular tube to ensure that the light source chip and the light receiving chip 442 of the optical coupling device 440 meet the predetermined free space coupling requirement.

[0038] The inner diameter of the circular tube 410 plays a crucial role in the performance of the optical coupling device 440. The minimum inner diameter of one end of the circular tube 410 is set according to the lens size of the light source chip 441 of the optical coupling device 440, and the minimum inner diameter of the other end of the circular tube 410 is set according to the size of the light receiving chip 442 of the optical coupling device 440. The length of the circular tube 410 is determined by the coupling condition between the light source chip 441 and the light receiving chip 442. If the coupling condition between the light source chip 441 and the light receiving chip 442 meets the preset coupling condition, the length of the corresponding circular tube is determined as the target length.

[0039] In detail, as shown in Figure 4 , the inner diameter of the first end of the circular tube 410 is equal to the inner diameter of the second end of the circular tube 410.

[0040] In detail, as shown in Figure 6 , in order to enhance the reliability of the optical coupling device during operation, the inner diameter of the circular tube 410 corresponding to the light source chip 441 of the optical coupling device 440 is smaller than the inner diameter of the circular tube 410 corresponding to the light receiving chip 442 of the optical coupling device 440, and the inner diameter of the circular tube 440 increases from the end where the light source chip 441 is arranged to the end where the light receiving chip 442 is arranged.

[0041] More specifically, the inner space of the circular tube 410 is one of vacuum, air, and nitrogen.

[0042] The application keeps the light of the light coupling device in free space during the light transmission process through the circular tube, so that there is no light transmission adhesive material between the light source chip and the light receiving chip, the performance degradation of the light coupling device caused by the transmission medium in different environments is eliminated, the reliability of the packaged light coupling device is greatly improved, and the packaging process only performs epoxy molding compound (EMC, Epoxy Molding Compound) molding on the light coupling device, reduces the packaging cost, and improves the packaging process.

[0043] The application also provides a multi-channel new type packaging structure of a light coupling device, which comprises N circular tubes, a first frame, a second frame, N light coupling devices, a molding compound and 2N control chips, the first frame and the second frame respectively close two ends of the N circular tubes, light source chips and light receiving chips in the N light coupling devices are respectively arranged at upper and lower ends in the N circular tubes, the light source chips in the N light coupling devices are connected with the first frame, the light receiving chips in the N light coupling devices are connected with the second frame, the 2N control chips are connected with the second frame, and the molding compound wraps the N circular tubes, the N first frames, the N second frames and the 2N control chips, wherein N is greater than or equal to 2.

[0044] The above examples only exemplarily illustrate the principle and effect of the application, and are not used to limit the application. Any person skilled in the art can modify or change the above examples without departing from the spirit and scope of the application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought of the application should be covered by the claims of the application.

Claims

1. A novel single channel package structure of an optical relay, characterized by, The packaging structure comprises a circular tube, a first frame, a second frame, an optical coupling device, plastic sealing glue and a control chip.

2. The single channel novel packaging structure of the optical relay according to claim 1, characterized in that, A first glue layer is arranged between the light source chip in the optical coupling device and the first frame, and a second glue layer is arranged between the light receiving chip in the optical coupling device and the second frame.

3. The single channel novel packaging structure of optical relay according to claim 1, characterized in that, A third glue layer is arranged between the first end of the circular tube and the first frame, and the second end of the circular tube and the second frame, and a fourth glue layer is arranged between the control chip and the second frame.

4. The single channel novel packaging structure of optical relay according to claim 3, characterized in that, The inner diameter of the first end of the circular tube is equal to the inner diameter of the second end of the circular tube.

5. The single channel novel packaging structure of optical relay according to claim 1, characterized in that, The inner diameter of the circular tube corresponding to the light source chip in the optical coupling device is smaller than the inner diameter of the light receiving chip in the optical coupling device, and the inner diameter of the circular tube increases from the end where the light source chip is arranged to the end where the light receiving chip is arranged.

6. The single channel novel packaging structure of the optical relay according to claim 4 or 5, characterized in that, The circular tube is a free space of one of vacuum, air and nitrogen.

7. A multi-channel novel packaging structure of an optical relay, characterized by, The multi-channel new packaging structure comprises N circular tubes, a first frame, a second frame, N optical coupling devices, plastic sealing glue and 2N control chips, the first frame and the second frame respectively close two ends of the N circular tubes, light source chips and light receiving chips in the N optical coupling devices are respectively arranged at upper and lower ends in the N circular tubes, the light source chips in the N optical coupling devices are connected with the first frame, the light receiving chips in the N optical coupling devices are connected with the second frame, the 2N control chips are connected with the second frame, the plastic sealing glue wraps the N circular tubes, the N first frames, the N second frames and the 2N control chips, and N≥2.

Images