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A kind of copper alloy strip and preparation method thereof

A copper alloy strip, copper alloy technology, applied in manufacturing tools, heat treatment equipment, furnaces, etc., can solve the problems of etching performance gap, lack of control of internal stress of finished products, etc., to achieve low internal stress, small temperature rise, fast heat dissipation Effect

Active Publication Date: 2022-07-05
NINGBO POWERWAY ALLOY PLATE & STRIP CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

[0003] The high-performance copper alloy strips commonly used for etching lead frames for chip packaging are mainly CuCrSnZn-based and CuFeP-based copper alloys, including C18045, C19210, C19400 and other alloy systems and their improved products, such as Furukawa’s EFTEC64T and EFTEC64T- C, although the performance in terms of strength can still meet the needs of use, but there is a lack of control over the internal stress of the finished product, and there is a gap in etching performance

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  • A kind of copper alloy strip and preparation method thereof
  • A kind of copper alloy strip and preparation method thereof
  • A kind of copper alloy strip and preparation method thereof

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the embodiments.

[0034] Selected 16 embodiment alloys and 1 comparative example alloy, and the specific components are shown in Table 1. The 16 embodiment alloys are all processed into strip finished products with a thickness of 0.1 mm by the preparation method of the present invention, and the key process parameters are controlled as shown in the table. 2; the conventional EFTEC64T alloy available on the market was selected for the comparative example alloy. The preparation process of the copper alloy strip in this embodiment is: batching→melting and casting→hot rolling→milling→rough rolling→solution and quenching treatment→intermediate rolling→aging treatment→cleaning→finishing rolling→tensile annealing, which specifically includes the following steps :

[0035] 1) Batching and casting: Prepare raw materials and batching according to the chemical composition of the alloy, and use an...

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Abstract

The invention discloses a copper alloy strip, which is characterized in that the mass percentage of the copper alloy is composed of Cr: 0.1wt%-1.2wt%, X: 0.01wt%-0.1wt%, M: 0.1wt%-1.0 wt%, the balance is Cu and inevitable impurities; wherein, X is selected from at least one of Si and Ti, and M is selected from at least one of Zn, Sn, and Ag. The copper alloy strip of the present invention has a tensile strength of more than 550 MPa, an electrical conductivity of more than 70% IACS, and an internal stress of less than 35 MPa, and has low internal stress while maintaining high tensile strength and good electrical conductivity. , which can better meet the development trend and performance requirements of miniaturization, multi-function, small temperature rise and fast heat dissipation of the new generation of ultra-large-scale integrated chip etched lead frames.

Description

technical field [0001] The invention belongs to the technical field of copper alloys, and particularly relates to a copper alloy strip and a preparation method thereof. Background technique [0002] With the rapid development of chip technology, chip lead frames put forward higher and higher requirements for the comprehensive properties of copper alloy strips. Chips are developing in the direction of miniaturization, multi-function, and ultra-large-scale integration. The pin spacing of the lead frame for chip packaging is getting smaller and smaller. In order to ensure high reliability support for the chip, the chip lead frame has a higher strength. Requirements; chips are developing towards ultra-large-scale integration, and higher and higher requirements for heat dissipation are also put forward. The conductivity of copper alloy strips for chip packaging is required to reach 70% IACS or more; The lead frame for packaging can only be produced by etching. In order to ensure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C9/02C22C9/04C22F1/08B23P15/00C22C1/02C21D9/52
CPCC22C9/00C22C9/04C22C9/02C22C1/02B23P15/00C22F1/08C22F1/002C21D9/52
Inventor 潘志军孟祥鹏张轩谭豪吕文跃屈董戴开斌
Owner NINGBO POWERWAY ALLOY PLATE & STRIP CO LTD