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Wiredrawing lubricating oil, preparation method thereof and drawing method of bonding wire

A technology of lubricating oil and bonding wire, applied in the field of microelectronic packaging and interconnection, which can solve the problems of influence, increase of material hardness, unfavorable bonding, etc.

Inactive Publication Date: 2018-06-01
GUANGDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Oxidized bonding wires will affect their conductivity and bonding properties during EFO treatment, which is not allowed in the field of microelectronic packaging. The current general method is to coat a layer of precious metals such as palladium on the metal surface , play a certain role in anti-oxidation, but the production cost is greatly increased, and the hardness of the material is significantly increased, which is not conducive to bonding

Method used

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  • Wiredrawing lubricating oil, preparation method thereof and drawing method of bonding wire

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preparation example Construction

[0028] The present invention also provides a preparation method of the above wire drawing lubricating oil, comprising: heating the lubricating oil, adding graphene powder, and ultrasonic treatment to obtain the wire drawing lubricating oil.

[0029] Wherein, the temperature of the heating is preferably 35° C. to 50° C.; the graphene powder is the same as described above, and will not be repeated here; the frequency of the ultrasonic treatment is preferably 2000 to 3000 HZ; the time of the ultrasonic treatment is preferably 20-60 min, more preferably 30-50 min, and more preferably 30-40 min; during the ultrasonic treatment, the temperature is preferably maintained at 35°C-50°C.

[0030] The present invention also provides a bonding wire drawing method, comprising: covering the drawing die with wire-drawing lubricating oil, and then drawing the metal wire to obtain bonding wire; the wire-drawing lubricating oil includes lubricating oil and graphene powder body.

[0031] In the ...

Embodiment 1

[0044] 1.1 The main components are 28% of No. 7 engine oil, 25% of triethanolamine oleate, 12% of sodium petroleum sulfonate, 3% of Turkish red oil, 4% of polyvinyl butyl ether, 26% of water, and 2% of other components for lubrication Heat the oil to 35-50°C and keep stirring.

[0045] 1.2 Add graphene powder to the stirring lubricating oil to obtain a liquid with a graphene powder mass percentage concentration of 5%. The diameter of the graphene powder is about 2-10 μm, the average thickness is less than 20 nm, and the carbon content is greater than 90.0%.

[0046] 1.3 Seal the above liquid and place it under ultrasonic conditions for half an hour, wherein the temperature of the liquid is kept between 35-50°C during the ultrasonic process to obtain wire drawing lubricating oil.

[0047] 1.4 Add wire drawing lubricating oil into the lubricating oil tank of the wire drawing module, then place the module completely in the middle of the oil tank, use the rotation and stirring char...

Embodiment 2

[0050] 2.1 The main components are 28% of No. 7 engine oil, 25% of triethanolamine oleate, 12% of sodium petroleum sulfonate, 3% of Turkish red oil, 4% of polyvinyl butyl ether, 26% of water, and 2% of other components for lubrication Heat the oil to 35-50°C and keep stirring.

[0051] 2.2 Add graphene powder to the stirring lubricating oil to obtain a liquid with a graphene powder mass percentage concentration of 10%. The graphene powder has a diameter of about 2 to 10 μm, an average thickness of less than 20 nm, and a carbon content greater than 90.0%.

[0052] 2.3 Seal the liquid above and place it under ultrasonic conditions for half an hour, wherein the temperature of the liquid is kept between 35°C and 50°C during the ultrasonic process to obtain wire drawing lubricating oil.

[0053] 2.4 Add the super-drawing lubricating oil into the lubricating oil tank of the wire drawing module, then place the module completely in the middle of the oil tank, and draw the copper wire...

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Abstract

The invention provides a drawing method of a bonding wire. The drawing method comprises the following steps: enabling a wiredrawing module to be covered with wiredrawing lubricating oil, and then drawing a metal wire to obtain the bonding wire, wherein the wiredrawing lubricating oil comprises lubricating oil and a graphene powder. Compared with the prior art, the graphene powder is added into thelubricating oil, graphene has high liquid absorption performance, when the graphene powder is uniformly dispersed into a liquid, the graphene powder is adsorbed onto the metal wire and the wiredrawing module through Van der Waals' force so as to form a protective film, a lubricating medium between the metal wire and the wiredrawing module becomes into a graphene film from the lubricating oil, thegraphene film takes effect with the lubricating oil, in one hand, the abrasion of the wiredrawing module can be reduced, namely the service life of the wiredrawing module is prolonged by increasing the lubrication degree in the pulling process, the processing precision and finished product rate are also improved simultaneously, the production cost is reduced, and in the other hand, oxidization ofthe bonding wire can also be prevented.

Description

technical field [0001] The invention belongs to the technical field of microelectronic packaging and interconnection, and in particular relates to a wire drawing lubricating oil, a preparation method thereof, and a bonding wire drawing method. Background technique [0002] Bonding wire is one of the four key basic materials in the field of microelectronic packaging and interconnection. In the manufacturing process of bonding wire, it is necessary to gradually draw thick wires with a diameter of several thousand microns to meet the requirements of use. Micron filaments, and this process is realized by the wire drawing module installed on the wire drawing machine. However, after a large amount of production and long-term work of the wire drawing die, the repeated friction between the copper wire and the wire drawing die will cause different degrees of wear on the wire drawing die on the one hand, and on the other hand, the scratches on the wire drawing die will also cause As ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/02C10M173/02C10M177/00H01L21/48B21C3/14C10N40/24
CPCB21C3/14C10M125/02C10M173/02C10M177/00C10M2201/041C10M2207/126C10M2209/04C10M2215/042C10M2219/044C10N2040/24H01L21/4896C10N2020/06
Inventor 张昱崔成强周章桥杨斌陈新杨海东
Owner GUANGDONG UNIV OF TECH
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