Design and development method for improving design maturity of ceramic dielectric capacitor

Abstract

The invention relates to a design and development method for improving the design maturity of a ceramic dielectric capacitor, and belongs to the technical field of capacitors. The method comprises the following specific steps: establishing a customer demand information platform; establishing a ceramic dielectric capacitor structure model; simulating the ceramic dielectric capacitor structure model; optimizing the product structure design according to the simulation result; testing key characteristics of the ceramic dielectric capacitor; and a modeling simulation technology is optimized according to a test result. According to the characteristics of capacitor design and development, a product design and development process is optimized through methods of establishing a customer demand information platform, building a simulation model, self-making a key characteristic test system and the like, and the design maturity is improved by two grades.

Description

Technical Field

[0001] The invention relates to a design and development method for improving the design maturity of a ceramic dielectric capacitor, and belongs to the technical field of capacitors. Background Art

[0002] Ceramic capacitors have good performance in high-frequency circuits and are widely used in mobile communications, aerospace, automotive electronics and other fields. With the development of electronic technology, the types and quantity of electronic components are increasing, and the quality and performance requirements of electronic components, especially ceramic capacitors, are getting higher and higher. However, the design and development of new ceramic capacitor products still have the following problems:

[0003] The capacitor development cycle is long and the cost is high. Figure 1 The traditional manufacturing process of ceramic capacitors shown in the figure is to first design the product according to customer needs based on experience, then conduct sample trial production, and then conduct mass production after the sample is tested and qualified. This production model mainly verifies the accuracy of the product design plan through several rounds of sample trial production. In order to produce qualified products, it is necessary to go through product design → sample trial production → sample testing → adjust product design → sample trial production again... → qualified testing → mass production, resulting in a waste of manpower, raw materials and resources, resulting in a long design and development cycle and high cost for ceramic capacitors.

[0004] Manufacturing maturity is a state that characterizes the degree to which manufacturing capabilities meet the optimal performance, cost, and schedule goals of the product's entire life cycle. The manufacturing system includes the entire supply chain and all manufacturing links, from product design and development to the entire process of final product delivery to users. my country has issued two military standards, GJB 8345-2015 "Definition of Equipment Manufacturing Maturity Levels" and GJB8346-2015 "Equipment Manufacturing Maturity Evaluation Procedures". For the manufacturing maturity evaluation of electronic components, the "Guidelines for Manufacturing Maturity Evaluation of Component Manufacturing Industry" has also been issued. According to this evaluation standard, based on the problems existing in the design and development of the above-mentioned ceramic capacitors, the design maturity of the capacitor manufacturing maturity is evaluated. The product design maturity is basically at the level of about level six, and the maturity level is low, which seriously restricts the development of enterprise modernization. Summary of the invention

[0005] In view of the problems of low design maturity such as long design and development cycle of ceramic dielectric capacitor products, frequent design changes, high research and development cost, and difficulty in testing key characteristics of capacitors, the present invention provides a design and development method for improving the design maturity of ceramic dielectric capacitors. According to the characteristics of capacitor design and development, the product design and development process is optimized by establishing a customer demand information platform, building a simulation model, and making a self-made key characteristic testing system, thereby improving its design maturity by two levels.

[0006] The technical solution adopted by the present invention is a design and development method for improving the design maturity of ceramic capacitors, and the specific steps are as follows:

[0007] Step 1: Establish a customer demand information platform;

[0008] Step 2: Establish a structural model of ceramic capacitor;

[0009] Step 3: Simulate the structural model of the ceramic capacitor;

[0010] Step 4: Optimize product structure design based on simulation results;

[0011] Step 5: Test the key characteristics of ceramic capacitors;

[0012] Step 6: Optimize modeling and simulation technology based on test results.

[0013] Furthermore, the step one is specifically to identify customer needs and establish a customer needs information platform.

[0014] Furthermore, the identifying of customer needs and establishing a customer demand information platform specifically involves conducting a customer demand analysis based on actual usage scenarios of the product among different customers and in different industries, and the establishing of a customer demand information platform specifically involves aggregating information parameters into a customer demand resource library, thereby forming a customer demand information platform.

[0015] Furthermore, the information parameters include usage scenarios and conditions, product functions and performance requirements, environmental applicability requirements, process and environmental protection requirements, etc.

[0016] Furthermore, the step 2 specifically includes establishing a ceramic capacitor structure model according to information such as product structure, external dimensions, inner electrode material and thickness, outer electrode material and thickness, ceramic powder material and dielectric constant.

[0017] Furthermore, the step three specifically involves simulating key characteristics of the capacitor using three-dimensional electromagnetic field simulation software such as CST and HFSS.

[0018] Furthermore, the key characteristics include S parameters of the capacitor.

[0019] Furthermore, the step four specifically determines whether it is necessary to adjust the product design based on the simulation results; if the simulation results can meet the index requirements, the product design scheme can be directly obtained according to the ceramic capacitor structure model; if the simulation results cannot meet the requirements, it is necessary to adjust the material properties and dimensional parameters of the ceramic capacitor structure model to obtain a new ceramic capacitor structure model, and then perform simulation again, and decide whether to adjust the product design again based on the second simulation results, and repeat this process to obtain the optimal product design scheme.

[0020] Furthermore, the step five specifically involves trial production of samples according to the product design scheme obtained by simulation, and testing key characteristics of the samples.

[0021] Furthermore, the step six specifically includes comparing the errors between the simulation results and the actual test results, verifying the accuracy of the simulation results, and optimizing the modeling and simulation technology.

[0022] The present invention discloses a design and development method for improving the design maturity of ceramic capacitors. The beneficial effect is that compared with the prior art, in the design and development process of ceramic capacitors, after analyzing the special needs of customers, product modeling and performance simulation are performed, and key characteristics of the product are tested to ensure the accuracy of the simulation results. The present invention adopts simulation modeling to replace sample trial production, ensures the accuracy of the design, reduces design changes, shortens the product development cycle, reduces the production cost of electronic components, and improves the design maturity of ceramic capacitors. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 The figure shows a schematic diagram of the design and development process of traditional ceramic capacitors;

[0025] Figure 2 Shown is a schematic diagram of the design and development process of the ceramic capacitor optimized by the present invention;

[0026] Figure 3 Shown is a schematic diagram of the structural model of a ceramic dielectric capacitor in Example 1 of the present invention;

[0027] Figure 4 The figure is a schematic diagram of the simulation results of the ceramic capacitor in Example 1 of the present invention;

[0028] Figure 5 Shown is a schematic diagram of actual test results of the ceramic capacitor in Example 1 of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In order to further understand the content of the present invention, this technical solution is further explained below in conjunction with specific implementation methods.

[0031] Example 1: This example takes a capacitor with a length of 0.060 inches, a width of 0.030 inches, and a capacitance of 1pF as an example. The customer requires a rated voltage of 100V, and an S parameter of >-1.2dB when used within a frequency of 20GHz. Figures 2 to 5 As shown, this embodiment provides a design and development method for improving the design maturity of ceramic capacitors, and the specific steps are as follows:

[0032] Step 1: Establish a customer demand information platform; specifically, analyze customer demand for the actual use scenarios of the product for different customers and different industries, and establish a customer demand information platform. Specifically, the information parameters are summarized into a customer demand resource library to form a customer demand information platform; the information parameters include usage scenarios and conditions, product functions and performance requirements, environmental applicability requirements, process and environmental protection requirements, etc. In this embodiment, the customer needs a broadband capacitor with low insertion loss and high self-resonance frequency, so a surface mount product structure is used for design to ensure product performance indicators.

[0033] Step 2: Establish a structural model of ceramic capacitors; specifically, establish a structural model of ceramic capacitors according to the structural design, dimensions, inner electrode material and thickness, outer electrode material and thickness, and the material and dielectric constant of the ceramic powder. The material property parameters of the ceramic capacitor structural model and the parameter settings of the simulation port must be accurate. In this embodiment, according to product requirements, the length and width of the product are set to 0.060 inches and 0.030 inches respectively, the inner electrode is selected to be a silver-palladium alloy, the inner electrode thickness is set to 6um, the outer electrode is made of pure gold, and the thickness is set to 2.5um. According to the product rated voltage of 100V, the minimum distance of the Gap is set to 0.25mm, and the ceramic powder uses a material whose main crystal phase is barium titanate, such as Figure 3 The capacitor structure model is established as shown.

[0034] Step 3: Simulate the ceramic capacitor structure model; specifically, use CST 3D electromagnetic field simulation software to simulate the key characteristics of the capacitor. Figure 4 As shown, when the frequency is within 20GHz, the S parameters are all greater than -1.2dB, and the simulation results meet customer requirements.

[0035] Step 4: Optimize the product structure design according to the simulation results; if the simulation results do not meet the requirements, it is necessary to adjust the ceramic body, inner electrode, outer electrode position and thickness and other related information to optimize the product structure. In this embodiment, if the simulation results can meet the index requirements, the product design scheme can be directly obtained according to the ceramic capacitor structure model.

[0036] Step 5: Test the key characteristics of ceramic capacitors; specifically, according to the product design scheme obtained by simulation, conduct sample trial production, and after the trial production, test the S parameters of the samples, such as Figure 5 As shown, the S parameter test results are as follows. When the frequency is 20GHz, the S parameter is -0.11dB.

[0037] Step 6: Optimize modeling and simulation technology based on test results; compare the errors between simulation data and actual test results. The error rate is 2.6%, which is within the allowable range of 10%. This shows that the structural model and simulation results are accurate and do not need to be optimized, providing support for subsequent new product design and mass production.

[0038] In actual production, modeling and simulation capabilities are developed in the product planning stage to guide the design of prototypes and final products. The simulation model is then verified through test results from small-batch production. Finally, the simulation capability is verified through stable large-scale production, and the simulation model is used to assist in guiding lean production management.

[0039] Through the design and development process of the method of the present invention, two rounds of sample trial production are reduced, the development cycle is shortened by 6 months, and the product development cost is reduced from 10 yuan / unit to 6 yuan / unit. According to the design maturity evaluation standard, design development modeling is adopted for product development, and the design maturity can be improved from level 6 to level 8.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A design and development method for improving the design maturity of ceramic capacitors, characterized in that: The specific steps are as follows: Step 1: Establish a customer demand information platform; Step 2: Establish a ceramic capacitor structure model; Step 3: Simulate the ceramic capacitor structure model; Step 4: Optimize product structure design based on simulation results; Step 5: Test the key characteristics of ceramic capacitors; Step 6: Optimize modeling and simulation technology based on test results.

2. A design and development method for improving the design maturity of ceramic capacitors according to claim 1, characterized in that: Step one specifically involves identifying customer needs and establishing a customer needs information platform.

3. A design and development method for improving the design maturity of ceramic capacitors according to claim 2, characterized in that: Identify customer needs and establish a customer demand information platform. Specifically, conduct customer demand analysis based on the actual usage scenarios of the product among different customers and in different industries, and establish a customer demand information platform. Specifically, aggregate information parameters into a customer demand resource library, thereby forming a customer demand information platform.

4. A design and development method for improving the design maturity of ceramic capacitors according to claim 3, characterized in that: Information parameters include usage scenarios and conditions, product functions and performance requirements, environmental suitability requirements, and process and environmental protection requirements.

5. A design and development method for improving the design maturity of ceramic capacitors according to claim 1, characterized in that: The second step is to establish a ceramic capacitor structure model according to the product structure, external dimensions, inner electrode material and thickness, outer electrode material and thickness, ceramic powder material and dielectric constant.

6. A design and development method for improving the design maturity of ceramic capacitors according to claim 1, characterized in that: Step three specifically involves using CST and HFSS three-dimensional electromagnetic field simulation software to simulate the key characteristics of the capacitor.

7. A design and development method for improving the design maturity of ceramic capacitors according to claim 6, characterized in that: Key characteristics include the S parameters of the capacitor.

8. A design and development method for improving the design maturity of ceramic capacitors according to claim 1, characterized in that: Step 4 is to decide whether the product design needs to be adjusted based on the simulation results; if the simulation results can meet the index requirements, the product design scheme can be directly obtained according to the ceramic capacitor structure model; if the simulation results cannot meet the requirements, it is necessary to adjust the material properties and dimensional parameters of the ceramic capacitor structure model to obtain a new ceramic capacitor structure model, and then perform simulation again. According to the second simulation results, it is decided whether to adjust the product design again, and this process is repeated to obtain the optimal product design scheme.

9. A design and development method for improving the design maturity of ceramic capacitors according to claim 1, characterized in that: Step five is to manufacture samples based on the product design obtained through simulation and test the key characteristics of the samples.

10. A design and development method for improving the design maturity of ceramic capacitors according to claim 1, characterized in that: Step six specifically involves comparing the errors between the simulation results and the actual test results, verifying the accuracy of the simulation results, and optimizing the modeling and simulation technology.

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