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Method for producing specially-shaped micro-power mode copper alloy band of lead frame

A lead frame and production method technology are applied to the production field of lead frame special-shaped micro-electric mode alloy copper tape, which can solve the problems of inability to realize continuous production of large rolls, poor chip signal synchronization, poor material performance consistency, etc. The effect of chip signal synchronization performance, improving smoothness and improving compactness

Inactive Publication Date: 2014-04-02
泰兴市永志电子器件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The special-shaped alloy copper strip is the key material of the lead frame. At present, the main production process of the special-shaped copper strip in China is the horizontal continuous casting process or the roll extrusion production process. Uneven distribution, resulting in poor material performance consistency, poor signal synchronization of packaged chips, and materials produced by other production processes are prone to delamination, surface defects, poor roughness, and serious scratches
Although some manufacturers in China have adopted the production process of forging and rolling special-shaped copper strips, the production cycle is long and it is impossible to achieve continuous production of large coils.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The production method of lead frame special-shaped micro-electric mode alloy copper strip, the production process comprises the following steps:

[0024] (1) Uncoiling: Send the blank copper strip to the unwinding machine for unwinding, the thickness of the flat strip blank is 1.5mm, and the width is 40mm;

[0025] (2) Welding: Weld the tail of the first roll and the head of the next roll of the unloaded flat strip blank in step 1 with an argon arc automatic welding machine to ensure continuous production of the production line;

[0026] (3) Forging: The flat strip blank in step 2 is forged on a high-speed precision forging machine with a special mold until it is forged into the required continuous copper strip. The forging pressure is 100 tons, and the forging frequency is 1200 times / min. The stroke of the forging press is 8mm, so that the material is launched wide and does not extend, forming a continuous copper strip with a "T" shape in cross section;

[0027] (4) O...

Embodiment 2

[0033] The production method of lead frame special-shaped micro-electric mode alloy copper strip, the production process comprises the following steps:

[0034] (1) Uncoiling: Send the blank copper strip to the unwinding machine for unwinding. The thickness of the flat strip blank is 2.5mm and the width is 90mm;

[0035] (2) Welding: Weld the tail of the first roll and the head of the next roll of the unloaded flat strip blank in step 1 with an argon arc automatic welding machine to ensure continuous production of the production line;

[0036] (3) Forging: The flat strip blank in step 2 is forged on a high-speed precision hammer forging machine with a special mold until it is forged into the required continuous copper strip. The forging pressure is 100 tons, and the forging frequency is 1750 times / min. The stroke of the forging press is 8mm, so that the material is launched wide and does not extend, forming a continuous copper strip with a "T" shape in cross section;

[0037]...

Embodiment 3

[0043] The production method of lead frame special-shaped micro-electric mode alloy copper strip, the production process comprises the following steps:

[0044] (1) Uncoiling: Send the blank copper strip to the unwinding machine for unwinding, the thickness of the flat strip blank is 3mm, and the width is 120mm;

[0045] (2) Welding: Weld the tail of the first roll and the head of the next roll of the unloaded flat strip blank in step 1 with an argon arc automatic welding machine to ensure continuous production of the production line;

[0046] (3) Forging: Forging the flat strip blank in step 2 with a special mold on a high-speed precision forging machine until it is forged into the required continuous copper strip. The forging pressure is 100 tons, and the forging frequency is 2000 times / min. The stroke of the forging press is 8mm, so that the material is launched wide and does not extend, forming a continuous copper strip with a "T" shape in cross section;

[0047] (4) On-l...

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Abstract

The invention relates to a method for producing a specially-shaped micro-power mode copper alloy band of a lead frame. The method comprises the following steps: cutting a blank copper band into a flat band blank by a cutting machine, forging the welded flat band blank by a special die, continuously carrying out heating, heat preserving and annealing in an online mode, then spraying water for cooling to a normal temperature, brushing the surface of the material, finishing, rolling, positioning for cutting edges, coiling a finished band material by a coiling machine in a follow-up way, coiling lining paper, packaging and warehousing. The method is simple, the production cycle is short, and the copper band has an even internal texture, a smooth surface and excellent material performance.

Description

technical field [0001] The invention relates to a production method of electronic components, in particular to a production method of a special-shaped microelectric mode alloy copper strip applied to an electronic lead frame. Background technique [0002] The special-shaped alloy copper strip is the key material of the lead frame. At present, the main production process of the special-shaped copper strip in China is the horizontal continuous casting process or the roll extrusion production process. Uneven distribution leads to poor material performance consistency and poor signal synchronization of packaged chips. Materials produced by other production processes are prone to delamination, surface defects, poor roughness, and serious scratches. Although some domestic manufacturers have adopted the production process of forging and rolling special-shaped copper strips, the production cycle is long and it is impossible to achieve continuous production of large coils. Contents...

Claims

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Application Information

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IPC IPC(8): H01L21/48
CPCH01L21/4842
Inventor 熊志
Owner 泰兴市永志电子器件有限公司
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