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Preparation method of a microwave and hybrid circuit shell made of aluminum silicon carbide

A technology of aluminum silicon carbide and hybrid circuit, which is applied in the direction of microwave heating, electrical equipment shell/cabinet/drawer, electrical components, etc., can solve the problems of unstable use, low life, high thermal expansion coefficient, etc. The effect of high conductivity and low thermal expansion coefficient

Active Publication Date: 2020-06-30
西安明科微电子材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for preparing a microwave and hybrid circuit shell made of aluminum silicon carbide, aiming at solving the problem of high thermal expansion coefficient of the existing metal shells and not using them. Technical issues such as stability and low lifespan

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  • Preparation method of a microwave and hybrid circuit shell made of aluminum silicon carbide
  • Preparation method of a microwave and hybrid circuit shell made of aluminum silicon carbide

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preparation example Construction

[0036] see figure 1 , the invention discloses a method for preparing a microwave and hybrid circuit shell made of aluminum silicon carbide, comprising the following steps:

[0037] S1. Cast aluminum silicon carbide shell 1, then machined and ground to the specified requirements;

[0038] S2. Use electric sparks to punch holes in the aluminum silicon carbide shell 1, and then seal the glass insulator 5 at the hole position. The sealing temperature is 450°C-550°C. The thermal expansion coefficient of the glass insulator 5 is 8-10. The inner lead wire is made of alloy Kovar lead wire 4;

[0039] S3. Using wire cutting and EDM to process the aluminum alloy cover plate 3, and then laser welding the aluminum silicon carbide shell 1 and the aluminum alloy cover plate 3, an aluminum layer is arranged before the aluminum silicon carbide shell 1 and the aluminum alloy cover plate 3 2;

[0040] S4. After sealing and welding, the surface of the shell is gold-plated.

[0041] Wherein, ...

Embodiment 1

[0062] Leave an aluminum layer with a thickness of 0.2 mm on the obtained aluminum silicon carbide tube shell, punch the tube shell and seal the glass insulator, laser seal and weld the aluminum alloy cover plate, the thickness of the aluminum alloy cover plate is selected to be 0.5 mm, nickel-plated 3 μm, gold-plated 2 μm, and the aluminum alloy is obtained. Silicon carbide microwave and hybrid circuit shell, its structure is as follows figure 1 and figure 2 shown.

Embodiment 2

[0064] Leave an aluminum layer with a thickness of 0.5mm on the obtained aluminum silicon carbide tube shell, punch the shell and seal the insulator, laser seal and weld the aluminum alloy cover plate, the thickness of the aluminum alloy cover plate is 1mm, nickel plating 2.5μm, gold plating 1.5μm, to obtain aluminum Silicon carbide microwave and hybrid circuit case.

[0065] Gained embodiment 1 and the shell that embodiment 2 obtains carry out insulator air tightness test result 10 -8 ~10 -9 Pam 3 / s, the airtightness test result of the sealing and welding of the tube shell is 10 -7 ~10 -8 Pam 3 / s.

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Abstract

The invention discloses a preparation method of microwave and hybrid circuit tube shells of aluminum silicon carbide materials. According to the preparation method, the volume percentage of silicon carbide to aluminum silicon carbide is 70%, holes are punched into an aluminum silicon carbide shell by the aid of electric sparks, glass insulators are sintered on the holes in the shell, the sealing temperature of the glass insulators ranges from 450 DEG C to 550 DEG C, a heat expansion coefficient is 6-10, air tightness can reach 10-8Pa m<3> / s-10-9Pa m<3> / s, aluminum alloy cover plates with the thickness of 1mm are machined in a linear cutting and electric spark manner, the tube shells and the cover plates are welded by the aid of lasers, and the surfaces are planted with gold with the thickness of 1-2mum to obtain the microwave and hybrid circuit tube shells of the aluminum silicon carbide materials. The tube shells are high in heat conductivity and air tightness and low in heat expansion coefficient, have bright prospect in microwave and hybrid circuits and can replace market similar metal tube shells.

Description

technical field [0001] The invention belongs to the field of aluminum silicon carbide production, and in particular relates to a method for preparing a microwave and hybrid circuit shell made of aluminum silicon carbide. Background technique [0002] With the advent of the high-power era, the requirements for the stability of electronic components are getting higher and higher. At present, metal shell products such as kovar alloy or copper alloy are mostly used in the market. Although the thermal conductivity of metal products is high, there are problems such as product instability and low service life due to the large difference between the thermal expansion coefficient and the chip. Just greatly restricted the scope of use of the metal shell. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing a microwave and hybrid circuit shell made of aluminum silicon carbide, aiming at solving the proble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K5/00C04B35/565C04B35/622C04B41/90C04B37/02H05B6/64
CPCC04B35/565C04B35/622C04B37/026C04B41/52C04B41/90C04B2235/349C04B2237/121C04B2237/365C04B2237/402H05B6/64H05K5/00C04B41/5155C04B41/4523C04B41/5144C04B41/5116
Inventor 刘波波张伟杨晓青
Owner 西安明科微电子材料有限公司
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