Special-shaped copper strip cleaning and passivating process

A copper strip and special-shaped technology, which is applied in the field of special-shaped copper strip cleaning and passivation technology, can solve the problems of difficult control of product dimensional accuracy, poor roughness and anti-discoloration ability, and high surface roughness, so as to improve product quality and resist oxidation. good ability, good effect

Inactive Publication Date: 2020-02-21
GUIZHOU AEROSPACE NANHAI SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent application mainly talks about the processing process of upward-drawing special-shaped copper strips. The operation is simple, and the dimensional accuracy of the product is not easy to control. The produced special-shaped copper strips have an oxide layer and a high surface roughness, which is a low-end product.
[0006] However, in the prior art, the degreasing and passivation of special-shaped copper strips is simply degreasing and passivation, and the roughness and discoloration resistance of the products are poor. , the surface is in an oxidized state, and the appearance color is poor, which is not conducive to subsequent processing

Method used

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  • Special-shaped copper strip cleaning and passivating process
  • Special-shaped copper strip cleaning and passivating process
  • Special-shaped copper strip cleaning and passivating process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A cleaning and passivation process for special-shaped copper strips, comprising the following steps:

[0047] Step 1: Use scissors to cut the waste copper strip, shrink the uncoiler, remove the waste copper strip, then put the copper strip to be cleaned into the uncoiler, and then tighten the uncoiler to firmly fix the copper strip on the uncoiler On the machine, let the joint part of the copper strip pass through the first pressure roller, and weld it with another part of the copper strip on the production line;

[0048] Step 2: When the looper falls to the marked line position, lift the first pressing plate of the production line, increase the running speed of the copper strip, and let the copper strip pass through the front looper, the first deviation correction, and the front S roller successively; the operation of the copper strip The speed is 5m / min;

[0049] Step 3: When the soldered copper strip joint reaches the alkali cleaning brush wheel, the alkali cleaning...

Embodiment 2

[0055] A cleaning and passivation process for special-shaped copper strips, comprising the following steps:

[0056] Step 1: Use scissors to cut the waste copper strip, shrink the uncoiler, remove the waste copper strip, then put the copper strip to be cleaned into the uncoiler, and then tighten the uncoiler to firmly fix the copper strip on the uncoiler On the machine, let the joint part of the copper strip pass through the first pressure roller, and weld it with another part of the copper strip on the production line;

[0057] Step 2: When the looper falls to the marked line position, lift the first pressing plate of the production line, increase the running speed of the copper strip, and let the copper strip pass through the front looper, the first deviation correction, and the front S roller successively; the operation of the copper strip The speed is 15m / min;

[0058] Step 3: When the soldered copper strip joint reaches the alkali cleaning brush wheel, the alkali cleanin...

Embodiment 3

[0064] A cleaning and passivation process for special-shaped copper strips, comprising the following steps:

[0065] Step 1: Use scissors to cut the waste copper strip, shrink the uncoiler, remove the waste copper strip, then put the copper strip to be cleaned into the uncoiler, and then tighten the uncoiler to firmly fix the copper strip on the uncoiler On the machine, let the joint part of the copper strip pass through the first pressure roller, and weld it with another part of the copper strip on the production line;

[0066] Step 2: When the looper falls to the marked line position, lift the first pressing plate of the production line, increase the running speed of the copper strip, and let the copper strip pass through the front looper, the first deviation correction, and the front S roller successively; the operation of the copper strip The speed is 8m / min;

[0067] Step 3: When the soldered copper strip joint reaches the alkali cleaning brush wheel, the alkali cleaning...

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Abstract

The invention discloses a special-shaped copper strip cleaning and passivating process. The special-shaped copper strip cleaning and passivating process comprises the steps of copper strip unrolling,shearing / welding, first-time plate pressing, front loop treatment, first-time correction, front S roller treatment, alkali washing brushing, first-time wringing roller treatment, first-stage clear water washing, second-time wringing roller treatment, second-stage clear water washing, third-time wringing roller treatment, three-stage clear water washing, fourth-time wringing roller treatment, acidwashing, fifth-time wringing roller treatment, first-stage clear water washing, sixth-time wringing roller treatment, second-stage clear water treatment, seventh-time wringing roller treatment, second-time correction, middle S roller treatment, first-time precise polishing, second-time precise polishing, eight-time wringing roller treatment, first-time hot water washing, ninth-time wringing rollertreatment, passivation, tenth-time wringing roller treatment, second-time hot water washing, eleventh-time wringing roller treatment, drying, rear S roller treatment, second-time roller pressing, rear loop treatment, second-time plate pressing, shearing, third-time roller pressing, third-time correction, copper strip rolling and packaging. According to the special-shaped copper strip cleaning andpassivating process, the roughness of the cleaned and passivated copper strips ranges from 0.05 to 0.25, and the surface of the copper strips can be kept unchanged and is not oxidized for half a year.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing, and in particular relates to a cleaning and passivation process for special-shaped copper strips. Background technique [0002] Special-shaped copper strip is a special alloy strip used to manufacture semiconductors, integrated circuit lead frames and new terminal blocks. It plays the role of supporting chips, connecting external circuits and heat dissipation inside integrated circuits. It is a key material for integrated circuits. It occupies an extremely important position in integrated circuit devices and various assembly procedures. It is widely used in various emerging fields such as consumer electronics, computers and peripherals, network communications, automotive electronics, equipment and instruments, and electronic lighting. [0003] In recent years, with the continuous expansion of large-scale integrated circuit and ultra-large-scale integrated circuit production l...

Claims

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Application Information

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IPC IPC(8): C23G3/02C23G1/10C23C22/73
CPCC23C22/73C23G1/103C23G3/027
Inventor李海东余波刘小军周华宇
OwnerGUIZHOU AEROSPACE NANHAI SCI & TECH