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Preparation process of light electronic packaging material

A technology for electronic packaging materials and preparation processes, which is applied to the improvement of process efficiency, circuits, electrical components, etc., can solve the problems of high cost and complicated preparation process, and achieve the effects of low cost, simple process and low thermal expansion coefficient

Inactive Publication Date: 2012-04-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the methods for preparing high-silicon-aluminum electronic packaging materials mainly include powder metallurgy and spray deposition, but these two preparation processes are relatively complicated and cost relatively high. Therefore, it is expected that a stable and simple process with low cost can be developed. Excellent preparation technology of material preparation technology

Method used

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  • Preparation process of light electronic packaging material
  • Preparation process of light electronic packaging material
  • Preparation process of light electronic packaging material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Industrial pure aluminum and high-purity silicon are smelted in a vacuum induction furnace at 830°C at a mass ratio of 7:3 (Al-30% Si), and evenly melted and cast into a metal mold with a diameter of 60mm to make aluminum-silicon self-consumption electricity Excellent, the length is 1m; the mass percentage is 21%Na 3 AlF 6 , 27% NaCl, and 52% KCl were mixed evenly, kept at 550°C for 6 hours as electroslag material, and kept in the oven until it was taken out before electroslag treatment to ensure dryness; put the consumable electrode rod into the electric The slag furnace is used for smelting, the working voltage of the electroslag furnace is 40V, the working current is 1.5kV, the arc starting block is pure aluminum block, and the arc starting slag material is CaF 2 During the smelting process, electroslag material is added as needed until the electroslag process is completed; after electroslag smelting, the aluminum-silicon ingot that is rapidly solidified by a water-...

Embodiment 2

[0025] Industrial pure aluminum and high-purity silicon are smelted in a vacuum induction furnace at 1040°C at a mass ratio of 1:1 (Al-50% Si), and evenly melted and cast into a metal mold with a diameter of 60mm to make aluminum-silicon self-consumption electricity Excellent, the length is 1m; the mass percentage is 23%Na 3 AlF 6 , 25% NaCl, and 52% KCl were mixed evenly, kept at 550°C for 7 hours as electroslag material, and kept in the oven until it was taken out before electroslag to ensure dryness; put the consumable electrode rod into electroslag The working voltage of the electroslag furnace is 40V, the working current is 2kV, the arc starting block is pure aluminum block, and the arc starting slag is CaF 2 During the smelting process, electroslag material is added as needed until the electroslag process is completed; after electroslag smelting, the aluminum-silicon ingot that is rapidly solidified by a water-cooled crystallizer is annealed at 340°C for 4 hours and the...

Embodiment 3

[0027] Industrial pure aluminum and high-purity silicon are smelted in a vacuum induction furnace at 1160°C at a mass ratio of 2:3 (Al-60% Si), and evenly melted and cast into a metal mold with a diameter of 60mm to make aluminum-silicon self-consumption electricity Excellent, the length is 1m; the mass percentage is 25%Na 3 AlF 6 , 27% NaCl, and 48% KCl were mixed evenly, kept at 550°C for 6 hours as electroslag material, and kept in the oven until it was taken out before electroslag to ensure dryness; put the consumable electrode rod into electroslag The working voltage of the electroslag furnace is 40V, the working current is 2.5kV, the arc starting block is pure aluminum block, and the arc starting slag is CaF 2 During the smelting process, the electroslag material is continuously added until the electroslag process is completed; after electroslag smelting, the aluminum-silicon ingot that is rapidly solidified by a water-cooled crystallizer is annealed at 360°C for 4.5 ho...

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Abstract

The invention discloses a preparation process of a light electronic packaging material which consists of aluminum and silicon, wherein the content of silicon in mass percent is 30-80% and the balance is aluminum. The process comprises the steps of: mixing the aluminum and the silicon and then placing the mixture in a vacuum induction furnace for smelting at a temperature of 800-1300 DEG C so as to obtain a consumable electrode bar; loading in an electric slag furnace for electric slag smelting, wherein the work voltage of the electric slag furnace is 20-40V, the work current is 1-10kA, the arc strike block is a pure aluminum block and the arc strike slag is CaF2; adding electric slag which is thermally insulated for 4-8h at a temperature within 500-800 DEG C in the smelting process, wherein the addition of the electric slag is 3-4% of the quality of the consumable electrode bar and the electric slag consists of 20-30% of Na3A1F6, 25-35% of NaC1 and 45-55% of KC1 in mass percent; and annealing the aluminum-silicon cast ingot which is rapidly solidified by a water cooling crystallizer for 3-5h at a temperature within 325-375 DEG C after the smelting of the electric slag.

Description

technical field [0001] The invention relates to a preparation process of a lightweight electronic packaging material. The material is high-silicon aluminum and belongs to the field of electronic packaging. Background technique [0002] In recent years, electronic equipment has developed towards high speed, small size, high power, and high reliability, semiconductor devices have developed towards high integration, large-scale, multi-chip, and high power, and circuit wiring has rapidly developed towards micro, short-term, and low resistance. In order to make the computer run faster, more lines need to be arranged on the integrated circuit substrate, which will lead to a substantial increase in the heat generated per unit volume of the integrated block, and the power transmitted by each substrate will also be greatly increased. If the heat cannot be dissipated quickly through the packaging structure such as the substrate, it will be difficult for the integrated block to work no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/18C22C21/02C22C28/00C22F1/043C22F1/16H01L23/28
CPCY02P10/25
Inventor 薛烽刘欢周健白晶孙扬善
Owner SOUTHEAST UNIV
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