A packaging shell of a miniaturized isolator for communication and a manufacturing method thereof

Abstract

The present invention discloses a packaging shell of a miniaturized isolator for communication and a manufacturing method thereof, belonging to the technical field of microwave component packaging. The packaging shell comprises a main shell (1) and a metal base (2) located at the bottom of the main shell (1), wherein six pins (3) are provided on the metal base (2), and the six pins (3) include two signal ports (31). A connection point (5) is additionally provided on the side of each signal port (31). The present invention arranges the cutting point of the base of the packaging shell in a non-welding area, which can effectively improve the weldability and environmental resistance of the product. The six pins can be molded first and then injection molded, so that the six pins can ensure a higher flatness and improve the qualified rate of the product. Moreover, the base can be directly used in production after cutting, thereby significantly improving the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave component packaging, and in particular to a packaging shell of a miniaturized isolator for communication and a manufacturing method thereof. Background Art

[0002] Isolators, also known as circulators, are an important fundamental component in microwave engineering. Lumped parameter narrowband, low-power isolators are widely used in the construction of communication base stations.

[0003] The packaging of the isolator is an important part of its production. The use of plastic packaging shells to realize the installation structure of isolator products is the mainstream design method of this type of products. The plastic packaging structure of current products is as follows: Figure 1 and Figure 2 As shown in the figure, it can be seen that it includes a main shell 1 and a base 2 located at the bottom of the main shell 1, wherein the main shell 1 is generally made of plastic materials such as PPS or LCP, and the base 2 is generally made of metal, and Cu electroplated with Ag is common. Six pins 3 are provided on the base 2, two of which are signal ports 31, and the remaining four pins are ground.

[0004] Since the product needs to be industrialized in large quantities, the metal base 2 parts of the isolator plastic shell need to be formed by continuous die stamping, and then combined with continuous injection molding to complete the large-scale and low-cost production of the product. Therefore, the plastic packaging shell is designed in the form of a continuous material strip, such as Figure 3 As shown, connecting strip points 4 are provided.

[0005] The packaging shell with the above structure and manufacturing process has the following problems:

[0006] (1) In the mass production of plastic packaging shells, the cutting point of the shell structure is the welding point of the product. The cutting of the metal material of the metal base 2 destroys the silver layer of the surface base 2, causing the base material to leak, which is not conducive to the installation and welding of the product, and further leads to a decrease in the material's weldability and environmental resistance;

[0007] (2) After the product is cut from the strip, it needs to be bent, which results in low production efficiency: taking an 8-hole mold as an example, the entire production process can only achieve a production efficiency of 3,000 qualified products per hour;

[0008] (3) The flatness of the six pins 3 of the substrate 2 is low, resulting in a low product qualification rate: the flatness between the six pins at the bottom needs to be guaranteed to be less than 0.12 mm, and the qualification rate using traditional processes is only about 79%. Summary of the Invention

[0009] One of the objectives of the present invention is to provide a packaging shell for a miniaturized isolator for communication to solve the above-mentioned problem.

[0010] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a packaging shell of a miniaturized isolator for communication, including a main shell and a metal base located at the bottom of the main shell, six pins are provided on the metal base, and the six pins include two signal ports: a connection point is added on the side of each signal port.

[0011] A second object of the present invention is to provide a method for manufacturing the packaging shell of the above-mentioned miniaturized isolator for communications: first, a metal base is manufactured by mold molding, and six pins are formed, the six pins are formed into a bent portion, and connection points are formed on the side surfaces of two of the six pins' signal ports; then, a plastic main shell is formed on the metal base by injection molding.

[0012] The plastic package housing of the present invention has a new structure, and a completely new design is made at the connection between the metal base and the material strip, and the connection point is designed at a position where the device does not need to be welded;

[0013] The present invention proposes a novel plastic shell material strip connection method, which changes the connection point between the metal base of the plastic shell and the material strip, ensuring that the six pins and ground of the device soldering will not leak out of the base material during the production process of the plastic shell, thereby improving the solderability and environmental adaptability of the plastic shell.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] (1) The new structure of the present invention sets the cutting point of the base of the package shell in the non-welding area, which can effectively improve the product's weldability and environmental resistance performance;

[0016] (2) The six pins of the present invention can be molded first and then injection molded, so that the six pins can ensure higher flatness and improve the product qualification rate. Compared with the qualification rate of about 79% of the traditional method, the production scheme of the present invention can increase the product qualification rate to more than 96%;

[0017] (3) In the substrate of the present invention, the six pins have been bent in the previous mold forming step, and the six pins are bent into the final use state at the same time. After cutting, they can be directly used for production, and the production efficiency is significantly improved. Compared with the traditional method of 3,000 qualified products per hour, the production scheme of the present invention, which also uses an 8-hole mold, can increase the production efficiency to more than 5,000 qualified products per hour. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the disassembly of a packaging shell of the prior art of the present invention;

[0019] Figure 2A schematic diagram of a package shell according to the prior art of the present invention after being combined through an injection molding process;

[0020] Figure 3 This is a schematic diagram of a continuous material strip according to the prior art of the present invention;

[0021] Figure 4 This is a schematic diagram of a disassembled package housing according to an embodiment of the present invention;

[0022] Figure 5 Schematic diagram of a continuous material strip according to an embodiment of the present invention.

[0023] In the figure: 1. Main shell; 2. Base; 3. Pin; 31. Signal port; 4. Connection point of material strip; 5. Connection point; 6. Cutting point. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Example:

[0026] See also Figure 4 A packaging shell of a miniaturized isolator for communication includes a main shell 1 and a metal base 2 located at the bottom of the main shell 1. The metal base 2 is provided with six pins 3. The six pins 3 include two signal ports 31. A connection point 5 is additionally provided on the side of each signal port 31.

[0027] The method for manufacturing the package shell of the above-mentioned miniaturized isolator for communication is as follows: first, a metal base 2 is manufactured by mold forming, and six pins 3 are formed. The six pins 3 are formed into a bent portion, and connection points 5 are formed on the side surfaces of two signal ports 31 of the six pins 3; then, a plastic main shell 1 is formed on the metal base 2 by injection molding, and the result is obtained; see Figure 5 , wherein the cutting point 6 is set in the non-welding area. That is, the main shell 1 is made of plastic and is connected and fixed with other metal parts by injection molding.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A packaging shell of a miniaturized isolator for communication, comprising a main shell (1) and a metal base (2) located at the bottom of the main shell (1), wherein six pins (3) are provided on the metal base (2), and the six pins (3) are composed of two signal ports (31) and four ground ports, characterized in that: A connection point (5) is added to the side of each signal port (31), so that the cutting point of the metal base (2) is set in a non-welding area, and the connection point (5) is located at the connection between the metal base (2) and the material strip.

2. The method for manufacturing a packaging shell of a miniaturized isolator for communication according to claim 1, characterized in that: First, a metal base (2) is manufactured by die molding, and six pins (3) are formed. The six pins (3) are formed into bending portions, and connection points (5) are formed on the sides of two signal ports (31) among the six pins (3); then, a plastic main shell (1) is formed on the metal base (2) by injection molding.

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