Can gold Bond with copper?

Both gold and copper wires have been wire-bonded successfully to the copper die even without prior plasma cleaning. The ball diameter for both wires are 60 μm on a 100 μm fine pitch bond pad.

What Bond does copper wire have?

metallic bonding
Explanation: Copper wire consists of Cu nuclei (that are positively charged due to the positively charged protons) that are surrounded by a “sea” of delocalized electrons (that are negatively charged that move freely throughout the material which is known as metallic bonding.

Why is gold wire bonded?

Gold has several benefits, which make it the preferred material for bonding wire. These benefits include high electrical conductivity, good corrosion resistance, and the capability to be bonded in position in an ambient environment.

What is gold bonding wire?

Gold wire bonding is the process by which gold wire is attached to two points in an assembly to form an interconnection or an electrically conductive path. Heat, ultrasonics, and force are all employed to form the attachment points for the gold wire.

How does gold wire bond to copper wire?

Gold wire that has no oxide and is softer will allow bonding to a less rigid pad, however, copper is much less forgiving. For example with a QFN package, the gold plated bond pads on which the second bond is placed, are supported by tape (see Figure 7).

Which is better Cu wire or gold wire?

Long wire bonds can be critical to the overall package performance. In applications where resistance can improve performance, using Copper (Cu) wire can offer real technical benefits. Furthermore, Cu wire reduces heat dissipation within a package. Copper wire offers better resistance than gold wire. There are no drawbacks on Cu wire capacitance:

Are there any drawbacks to copper wire bonding?

There are no drawbacks on Copper wire inductance: Self inductance is nearly the same for Gold (Au) and Copper (Cu) wire. Copper wire bonding is widely adopted in the industry and gaining acceptance in all market segments including the automotive industry.

Is the self inductance of copper and gold the same?

Copper wire self capacitance is nearly the same for Gold (Au). There are no drawbacks on Copper wire inductance: Self inductance is nearly the same for Gold (Au) and Copper (Cu) wire. Copper wire bonding is widely adopted in the industry and gaining acceptance in all market segments including the automotive industry.