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A kind of insulator solder for aluminum silicon carbide shell and preparation method thereof

A technology of aluminum silicon carbide and insulators, applied in welding equipment, welding/cutting media/materials, manufacturing tools, etc., can solve the problem of limited welding temperature gradient of chips and components, application restrictions of aluminum silicon carbide shells, complex processes, etc. problems, achieve the effect of improving solderability and permeability, enriching the welding range, and good wettability

Active Publication Date: 2021-05-25
西安明科微电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is complex and costly. The most important thing is that the general welding temperature of brazing is lower than 300°C, which limits the temperature gradient of the subsequent chip and component welding of the shell, and the application of aluminum silicon carbide shells is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] A kind of preparation method of insulator solder for aluminum silicon carbide shell of the present invention comprises the following steps:

[0028] S1. Add 1-5% of sodium silicate, 1-5% of germanium sheet, 20-60% of phosphorus pentoxide, 20-40% of diboron trioxide, 3-10% of molybdenum oxide, and 1-10% of cuprous chloride. %, silver chloride 1-5%, bismuth oxide 1-10%, potassium fluoroaluminate 1-5%, anhydrous sodium carbonate 1-5%, sodium oxide 0.1-3%, aluminum oxide 0.1-1%, three Tungsten oxide 0.1-0.5% is dried and mixed evenly, and the whole is recorded as M1;

[0029] S2. Put M1 into a quartz crucible, heat it in a melting furnace, and keep it warm at 1100-1600° C. for 0.5-5 hours;

[0030] S3. Prepare a large amount of ethanol solution at -10~-30°C, take out the crucible, and quickly pour the molten slurry into the low-temperature ethanol solution. The whole process does not exceed 10s;

[0031] S4. Collect the slag in the low-temperature ethanol solution, and af...

Embodiment 1

[0037] 1. Add 4% sodium silicate, 3% germanium flakes, 43% phosphorus pentoxide, 32% boron trioxide, 4% molybdenum oxide, 2% cuprous chloride, 3% silver chloride, and 2% bismuth oxide , potassium fluoroaluminate 1%, anhydrous sodium carbonate 2.5%, sodium oxide 1.5%, aluminum oxide 0.3%, tungsten trioxide 0.2% and mix evenly after drying, the whole is recorded as M1;

[0038] 2. Put M1 into a quartz crucible, heat it in a melting furnace, and keep it at 1400°C for 3 hours;

[0039] 3. Prepare a large amount of -10°C ethanol solution, take out the crucible, and quickly pour the molten slurry into the low-temperature ethanol solution, the whole process does not exceed 10s;

[0040] 4. Collect the slag in the low-temperature ethanol solution, and after crushing, use zirconia balls to mill in the ethanol solution for 48 hours, filter, wash, and dry to obtain powder M2;

[0041]5. Prepare sodium hydroxymethylpropyl cellulose, polyvinyl alcohol, cetyltrimethylammonium bromide, trib...

Embodiment 2

[0044] The difference between Example 2 and Example 1 is that when preparing M1, the content of phosphorus pentoxide is 40%, potassium fluoroaluminate is 2%, molybdenum oxide is 5%, and bismuth oxide is 3%.

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PUM

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Abstract

The invention discloses an insulator solder for an aluminum silicon carbide tube shell and a preparation method thereof. Sodium silicate, germanium sheet, phosphorus pentoxide, diboron trioxide, molybdenum oxide, cuprous Bismuth, potassium fluoroaluminate, anhydrous sodium carbonate and additives are dried and mixed evenly to obtain M1. Put M1 into a quartz crucible to melt, then take it out and pour it into a low-temperature ethanol solution, then collect the slag, and put it in the ethanol solution Ball milling, filtering, cleaning, and drying to obtain the powder M2; then granulate the powder M2, dry press molding to obtain a hollow cylindrical green body M4, sinter the green body M4, and obtain the finished insulator solder after cooling. The solder prepared by the invention has good insulation performance at normal temperature, and can weld metal and aluminum silicon carbide, which meets the requirement of direct sintering of aluminum silicon carbide shell insulators.

Description

technical field [0001] The invention belongs to the technical field of low-temperature solder, and in particular relates to an insulator solder for an aluminum silicon carbide tube shell and a preparation method thereof. Background technique [0002] Silicon carbide reinforced aluminum matrix composite material has good thermal conductivity, small expansion coefficient, high strength, and low density. It is widely used in the field of electronic packaging, especially the shell made of high volume fraction aluminum silicon carbide, which improves the reliability and stability of components. It solves the problem of thermal failure of the circuit and is the material of choice in the harsh environment of aerospace. However, aluminum silicon carbide itself also has great disadvantages, such as poor temperature resistance. Insulators in the traditional sense are all glass or ceramics, and their sintering temperature is generally 800-1200°C, which cannot be applied to aluminum si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/36B23K35/40
CPCB23K35/3601B23K35/40
Inventor 刘昌涛陈燕
Owner 西安明科微电子材料有限公司
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