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Welding method of WP/Al composite material and Al2O3 ceramic

A composite material and welding method technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as poor wettability, improve bonding strength and air leakage rate, and reduce the probability of forming voids.

Active Publication Date: 2015-07-01
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] for W p / Al composite material and the poor problem of solder wettability commonly used, the purpose of the present invention is to provide a kind of W p / Al composite material with Al 2 o 3 ceramic soldering method to achieve post-soldering W p / Al composite material with Al 2 o 3 Effective Welding of Ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] a W p / Al composite material with Al 2 o 3 The welding method of ceramics, the method is carried out in the following steps:

[0024] (1) First put W p / Al composite material (the volume fraction of W is 30%) is polished, and then the composite material is immersed in Na at a temperature of 60 °C and a concentration of 10 g / L 2 CO 3 5min in aqueous solution, rinsed with deionized water, and then immersed the composite material in 20% HNO 3 After 20 min in the aqueous solution, it was taken out and washed with deionized water.

[0025] (2) The above W p / Al composite material was put into the zinc dipping solution for 20s, wherein, the zinc dipping solution was an aqueous solution containing 100g / L NaOH, 20g / L ZnO, and 50g / L potassium sodium tartrate. Then immerse in 20% HNO at a concentration of 3 soak in the aqueous solution for 10s, then immerse the composite material in the zinc dipping solution for 20s, take it out, wash it with deionized water, and dry it. ...

Embodiment 2

[0030] a W p / Al composite material with Al 2 o 3 The welding method of ceramics, the method is carried out in the following steps:

[0031] (1) First put W p / Al composite material (the volume fraction of W is 26%) is polished, and then the composite material is immersed in Na at a temperature of 80 °C and a concentration of 20 g / L 2 CO 3 2min in aqueous solution, and rinse with deionized water; then immerse the composite material in 50% HNO 3 After 10 min in the aqueous solution, it was taken out and washed with deionized water.

[0032] (2) The above W p / Al composite material was put into the zinc dipping solution for 50s, wherein, the zinc dipping solution was an aqueous solution containing 150g / L NaOH, 10g / L ZnO, and 30g / L potassium sodium tartrate. then immersed in 20% HNO 3 In the aqueous solution for 10s, then immerse the composite material in the zinc dipping solution for 40s, take it out, wash it with deionized water, and dry it.

[0033] (3) The above W p...

Embodiment 3

[0037] a W p / Al composite material with Al 2 o 3 The welding method of ceramics, the method is carried out in the following steps:

[0038] (1) First put W p / Al composite material (the volume fraction of W is 30%) is polished, and then the composite material is immersed in Na at a temperature of 70 °C and a concentration of 20 g / L 2 CO 3 2 min in aqueous solution, rinsed with deionized water, and then immersed the composite material in 30% HNO 3 After 10 min in the aqueous solution, it was taken out and washed with deionized water.

[0039] (2) The above W p / Al composite material was put into the zinc dipping solution for 30s, wherein the zinc dipping solution was an aqueous solution containing 120g / L NaOH, 15g / L ZnO, and 40g / L potassium sodium tartrate. then immersed in 20% HNO 3 In the aqueous solution for 10s, then immerse the composite material in the zinc dipping solution for 30s, take it out, wash it with deionized water, and dry it.

[0040] (3) The above W ...

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Abstract

The invention provides a welding method of a Wp / Al composite material and Al2O3 ceramic. The welding method comprises the following steps: (1) the surface of the Wp / Al composite material is grinded, deoiled and polished, and is washed by de-ionized water; (2) the treated Wp / Al composite material is put into zinc galvanizing liquid to perform the zinc galvanizing pretreatment; (3) a metal deposition layer with a thickness of 0.5-2 microns is sputtered on the surface of the Wp / Al composite material by a magnetron sputtering method; and (4) the Al2O3 ceramic plated with an Au layer on the surface, an Au-Sn solder and the Wp / Al composite material having the metal deposition layer and obtained in the step (2) are stacked in sequence, and are put in a vacuum sintering furnace to perform the vacuum welding; the welding temperature is 310-350 DEG C; the insulating time is 3-10 min; and the products are discharged from the furnace after the temperature is reduced below 50 DEG C. The welding method effectively solves the problem of weak wettability of the Wp / Al composite material and the brazing solder with high volume fraction; and the composite material and the Al2O3 ceramic are formed to effective welding after the welding.

Description

technical field [0001] The invention relates to a welding method of an aluminum-based composite shielding material and ceramics for electronic packaging, in particular to a W p / Al composite material with Al 2 o 3 A welding method for ceramics belongs to the technical field of shielding packaging. Background technique [0002] Semiconductor devices used in the aerospace field work in the space radiation environment for a long time, and are irradiated by cosmic rays, high-energy electrons, protons, etc., and their electrical parameters, especially the threshold voltage of MOS devices, degrade rapidly, which seriously affects the performance of spacecraft. The service life and the research on the anti-radiation hardening process of semiconductor devices have always been a topic of concern in the field of microelectronic shielding packaging. [0003] W p / Al composite material is a structure / function integrated material with radiation shielding function. The W element cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02
CPCB23K31/02
Inventor 马书旺汪宇羿杨剑刘坤梁秋实杨志民毛昌辉杜军
Owner GRIMAT ENG INST CO LTD
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