Composite modifier for copper alloy of lead frame

A compound modificator and lead frame technology, applied in the field of copper alloy processing, can solve the problems of backward technical level, restricting the production and development of electronic information industry, semiconductor and integrated circuit packaging industry, etc., achieve scientific and reasonable formula, improve high temperature mechanical properties, The effect of improving the quality of slab

Active Publication Date: 2011-07-20
GRIMAT ENG INST CO LTD
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  • Abstract
  • Description
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Problems solved by technology

Although the development and development of lead frame materials in my country is relatively early, the technical level is still relatively backward, which restricts the production and development of my country's electronic information industry, especially semiconductor and integrated circuit packaging industries.

Method used

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  • Composite modifier for copper alloy of lead frame

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Embodiment Construction

[0023] The following uses 16 implementation examples of the present invention (as shown in Table 1) to further illustrate the excellent performance of the present invention.

[0024] The production and processing technology is ingredients-semi-continuous ingot-milling-heating-hot rolling billeting-pickling-solution treatment-cold rolling-aging treatment-finishing rolling-stress relief annealing-finished product.

[0025] The casting experiment adopts 500KW intermediate frequency induction furnace and continuous casting equipment, and adopts the method of pouring the melt to the tundish to carry out the large ingot semi-continuous casting experiment. First melt the red copper, then add Cu-Fe, Cu-Zn master alloys, keep warm after melting, then add the pre-configured modifiers Cu-RE, Cu-Cr, Cu-Mg and other master alloys, stir for 10-15 minutes, Keep the temperature for 30-50 minutes, add Cu-P master alloy, pouring, and then perform milling and rolling processes to obtain the final pro...

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Abstract

Composite modifier for copper alloy of a lead frame belongs to copper machining technical field and contains one or more than two of rare earth La, Ce, Y and Sc, also contains Cr and Mg, and one or both of Zr and Ti; all elements are prefabricated into copper master alloy. The content of the elements includes (by weight proportion of alloy melt): 0.005-0.02% of Rare Earth (RE), 0.001-0.01% of chromium (Cr), 0.001-0.01% of magnesium (Mg), wherein the total content of zirconium (Zr) and titanium (Ti) is no more than 0.005% of the total weight of the alloy melt. The composite modifier is used for the smelting process of copper alloy for lead frame, can purify melt, refines grain crystals, improves the casting blank quality and the machining performance, and finally improves the strength and electric conductivity of end products.

Description

Technical field [0001] The invention relates to a composite modifier suitable for copper alloys for lead frames. It is a combined (composite) modifier containing rare earths and belongs to the field of copper alloy processing. The modifier can improve the copper alloy melt shape for lead frames. The nucleation rate can purify the alloy melt and refine the crystal grains, thereby improving the processing ability of the ingot and increasing the strength and conductivity of the final product. Background technique [0002] Integrated circuits are the core of modern electronic information technology and the foundation for the development of electronics, computers and information industries. As the main material for the manufacture of integrated circuits, the lead frame plays a role in supporting chips, protecting internal components, connecting external circuits and dissipating heat from components, so it occupies an extremely important position in the manufacture of integrated circui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06
Inventor 谢水生李雷黄国杰米绪军李强
Owner GRIMAT ENG INST CO LTD
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