Preparation method of spherical superfine gold powder for electronic materials

Abstract

The invention provides a preparation method of spherical superfine gold powder for electronic materials. The preparation method includes the following steps: a), preparing a fulminic acid gold solution, b), preparing a reductant solution and a dispersant solution, c), preparing the gold powder through a reduction reaction and d), washing and drying the gold powder. The preparation method is simple and reasonable, the spherical superfine gold powder prepared according to the method has the advantages of high dispersibility, centralized granularity, small specific surface area and high tap density, and conductor paste made of the superfine gold powder has excellent electric conductivity and sintering characteristic and compact sintered membrane layers.

Description

technical field

[0001] The invention relates to an electronic material, in particular to a method for preparing spherical ultrafine gold powder for electronic materials, and belongs to the technical field of electronic materials. Background technique

[0002] Electronic materials are the material basis for the development of modern electronics industry and science and technology. They mainly refer to materials used in electronic technology and microelectronic technology, including dielectric materials, semiconductor materials, piezoelectric and ferroelectric materials, conductive metals and their alloy materials. , magnetic materials, optoelectronic materials and other related materials. Electronic materials cover a wide range of materials whose main function is to be optically functional or affect the electrical properties of the product. At present, electronic materials are mainly used in industries such as IC manufacturing, flat panel displays, structures, printed circui...

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