Method for preparing ultrapure copper ingot

Abstract

The invention relates to a method for preparing an ultrapure copper ingot by performing electron beam melting technology on an ultrapure copper plate obtained by adopting an electrolytic method in an electron beam melting furnace. The method is characterized in that: in the preparation process, a 6 N (the purity is more than or equal to 99.9999 percent) electrolytic ultrapure copper plate is taken as a raw material, is subjected to surface cleaning and is subjected to the electron beam melting technology in the electron beam melting furnace so as to obtain a 6 N or more than 6 N ultrapure copper ingot. The invention provides a method which can effectively solve the problems that: the product specification form is single, several impurity elements are difficult to remove and the consistency is low, reduces the production cost, saves the energy, realizes the diversification of product forms, optimizes the physical property, improves the product quality and fully meets the use requirement of various downstream customers.

Description

technical field [0001] A method for preparing ultrapure copper ingots, in particular to a method for preparing ultrapure copper ingots from 6N (purity ≥99.9999%) ultrapure copper plates obtained by electrolysis through an electron beam melting furnace and related electron beam melting technology. Background technique [0002] 6N (purity ≥99.9999%) ultra-pure copper is a new type of metal material with excellent performance, which is used to prepare large electronic tubes, advanced special alloys, copper oxide rectifier components, ultra-miniature transformer windings, ground wires connecting chips and lead frames, lasers Mirror, microelectronics industry sputtering target and ion coating, high-fidelity audio wire, large-scale integrated circuit bonding wire and other fields, mainly used in the electronics industry. With the gradual expansion of circuit integration scale, reduction of device feature size, reduction of line width and increase of wiring layers, the preparation ...

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Problems solved by technology

In the electrolytic production method, the gaseous impurities in the metal are difficult to be removed, the obtained metal density is too far from its theoretical density, and there are too many internal defects; the product specification is also very single, which cannot meet the requirements of various users; through the electron beam The high-purity copper ingot prepared by other fire method equipment is difficult to avoid the pollution of the melting crucible to the metal, and there is still a gap between the density and the theoretical density, and it is difficult to meet the requirements of special users

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