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A 90 nm Communication Technology Featuring SiGe HBT ...

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<strong>SiGe</strong>:C <strong>HBT</strong> Architecture<br />

Extrinsic base implant<br />

2<br />

1<br />

Emitter poly<br />

B<br />

a.<br />

E<br />

<strong>SiGe</strong><br />

C<br />

Quasi-<br />

Self-aligned<br />

B<br />

b.<br />

1<br />

Replacement emitter<br />

pedestal<br />

Spacer<br />

Fully<br />

Self-aligned<br />

Quasi-self-aligned chosen as the better tradeoff<br />

between manufacturing complexity and performance<br />

IEDM 2002 17

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