Diffusion welding method of copper target and aluminum alloy back plate and prepared copper target assembly

Abstract

The invention relates to a diffusion welding method of a copper target and an aluminum alloy back plate and a prepared copper target assembly. The diffusion welding method comprises the following steps that (1) a titanium film is coated on the welding surface of the copper target, then the copper target coated with the titanium film and the aluminum alloy back plate are assembled, and then put into a package sleeve as a whole; (2) the package sleeve obtained in step (1) is sealed and then degassed; and (3) the degassed package sleeve in step (2) is subjected to hot isostatic pressure welding,then the package sleeve is removed, and the diffusion welding of the copper target and the aluminum alloy back plate is completed. According to the diffusion welding method, the welding bonding degreebetween the copper target and the aluminum alloy back plate is advantageously improved through the good diffusion of the titanium film; in addition, the titanium film is coated on the welding surfaceof the copper target, the uniformity of the titanium film can be improved, the welding bonding degree is advantageously enhanced, operation can be simplified, and the cost of materials can be saved;and the welding bonding degree of the copper target assembly prepared by the method is more than 99 %.

Description

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AI Technical Summary

Benefits of technology

This patented technology improves the efficiency and accuracy of joining different metals together without requiring complicated operations or expensive equipment. By utilizing specific techniques such as solder fusion for better joint results, this technique simplifies manufacturing processes while reducing costs compared with traditional methods like resistance spot weldings (RSW). Additionally, the use of special alloys called Titanium targets has been found effective at prevention against corrosion due to their ability to diffuse into the metal substrate during heat transfer. Overall, these technical improvements help make more reliable connections made from various types of metals than previously possible.

Problems solved by technology

This patented technical solution describes various techniques for joining two types of materials during diffusing weldings without causing damage such as oxidation or fusion cracks over time. Existing solutions involve either separately applying molten tin onto both sides of the substrate before depositing the desired elements like silver, gold, platinum, etc., or combining these layers after they are applied. These processes require multiple steps and lead to reduced accuracy and reliability issues associated with conventional approaches.

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