Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of silver alloy bonding wire

A silver alloy bond and wire technology, applied in the field of chemical detection, can solve the problems of large solidification interval of FAB and golf ball, and achieve the effect of good bonding performance and optimized manufacturing process

Active Publication Date: 2021-04-09
NANCHANG HANGKONG UNIVERSITY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for silver alloy wires, unreasonable alloy composition or uneven alloy composition will lead to a large solidification range of FAB, resulting in defects such as eccentric balls and golf balls. Therefore, the optimized alloy composition and the uniformity of the alloy composition are to ensure The key to good bonding performance of silver alloy wire

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a silver alloy bonding wire, comprising the following processes of smelting, casting, primary wire drawing, intermediate annealing, secondary wire drawing, and final annealing;

[0021] When casting, the smelting raw materials are: 0.006% cerium, 2% copper, 0.04% lanthanum, 0.02% tungsten, 1%~4% aluminum, 0.5% palladium, the balance: silver, silver is 88 silver; In the silver raw material, cerium, copper, lanthanum, tungsten, aluminum and palladium are added in sequence according to the above ratio;

[0022] The high-frequency furnace is used for vacuum protection for multiple smelting, and the smelting temperature is 1200 ° C ~ 1400 ° C, and refining is performed at this temperature for 30 minutes;

[0023] After cooling to room temperature, the smelting process is repeated for three times in total;

[0024] Pull casting, the casting temperature is 1100℃, the cold cutting water of the mold is controlled at 0.8MPa, and the water flow is controlle...

Embodiment 2

[0030] A method for preparing a silver alloy bonding wire, comprising the following processes of smelting, casting, primary wire drawing, intermediate annealing, secondary wire drawing, and final annealing;

[0031] When casting, the smelting raw materials are: 0.012% cerium, 5% copper, 0.08% lanthanum, 0.05% tungsten, 4% aluminum, 1% palladium, the balance: silver, silver is 88 silver; In, add cerium, copper, lanthanum, tungsten, aluminum, palladium in sequence according to the above ratio;

[0032] The high-frequency furnace is used for vacuum protection for multiple smelting, and the smelting temperature is 1200 ° C ~ 1400 ° C, and refining is performed at this temperature for 30 minutes;

[0033] After cooling to room temperature, the smelting process is repeated for three times in total;

[0034] Pull casting, the casting temperature is 1100℃, the cold cutting water of the mold is controlled at 0.8MPa, and the water flow is controlled at 20~25m 3 / h, the speed is 30mm / s...

Embodiment 3

[0040] A method for preparing a silver alloy bonding wire, comprising the following processes of smelting, casting, primary wire drawing, intermediate annealing, secondary wire drawing, and final annealing;

[0041] When casting, the smelting raw materials are: 0.010% cerium, 3% copper, 0.05% lanthanum, 0.03% tungsten, 3% aluminum, 0.8% palladium, the balance: silver, silver is 88 silver; In, add cerium, copper, lanthanum, tungsten, aluminum, palladium in sequence according to the above ratio;

[0042] The high-frequency furnace is used for vacuum protection for multiple smelting, and the smelting temperature is 1200 ° C ~ 1400 ° C, and refining is performed at this temperature for 30 minutes;

[0043] After cooling to room temperature, the smelting process is repeated for three times in total;

[0044] Pull casting, the casting temperature is 1100℃, the cold cutting water of the mold is controlled at 0.8MPa, and the water flow is controlled at 20~25m 3 / h, the speed is 30mm...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Breaking forceaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a silver alloy bonding wire. The preparation method of the silver alloy bonding wire comprises the steps of smelting, drawing casting, primary wire drawing, intermediate annealing, secondary wire drawing and final annealing. During casting, smelting raw materials comprise 0.006 percent to 0.012 percent of cerium, 2 percent to 5 percent of copper, 0.04 to 0.08 percent of lanthanum, 0.02 percent to 0.05 percent of tungsten, 1 percent to 4 percent of aluminum, 0.5 percent to 1 percent of palladium and the balance 88 silver; In the silver raw material, the cerium, the copper, the lanthanum, the tungsten, the aluminum and the palladium are sequentially added according to the proportion.

Description

technical field [0001] The invention relates to the technical field of chemical detection, in particular to a preparation method of a silver alloy bonding wire. Background technique [0002] Wire bonding is still the mainstream technology in LED packaging due to its simple process, mature technology, low cost and suitable for various packaging forms. With the vigorous development of the microelectronics industry, the requirements for packaging technology are getting higher and higher. The packaging technology is developing in the direction of high density, miniaturization, and adaptation to high heat generation. Bonding wires with high thermal conductivity, low curvature, and ultra-fine diameter have become the focus of research and development. Because of its good corrosion resistance and high reliability, bonding wire is widely used in mid-to-high-end products in the packaging industry, but the gold wire is expensive. In order to reduce the packaging cost, various gold wi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22C5/06C22C5/08B21C37/04H01L23/49
CPCC22C5/08C22C5/06B21C37/047H01L23/49
Inventor 王善林尹立孟陈玉华王刚黄永德陈宜闫玲
Owner NANCHANG HANGKONG UNIVERSITY