Voids Formed in Si at Contact Interfaces
- Practical Electron Microscopy and Database -
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Ideally, to form contacts in ICs, Al (aluminum) can be deposited directly onto Si with perfect interfaces between Al and Si as shown in Figure 2017 (a). Unfortunately, the Si migrates into the Al, resulting in voids formed in the Si as shown in Figure 2017 (b).

Voids Formed in Si at Contact Interfaces

Figure 2017. (a) Al deposited directly onto Si; (b) Voids formed in Si.

 

 

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