Goodard v. Google, Inc.

Filing 73

Goodard v. Google, Inc.

Doc. 73 Att. 7

EXHIBIT G

Dockets.Justia.com

Sakamoto Sakamoto
U.S. Patent No. U.S. 5,248,893 5,248,893

The Goal: Smaller Transistors
Designers seek to make smaller transistors. When they Designers shrink them, the distance between the source and the drain shrinks, and so does the channel and the channeldrain free length.
CHANNEL-FREE LENGTH CHANNEL REGION

Sakamoto: '893 Patent Sakamoto:

GATE
(P) DRAIN

(P) SOURCE

N

FIG. 9 PRIOR ART

The Goal: Smaller Transistors
When the channel-free length gets too small: 1) current can flow when it should not; 2) current can escape from the channel region into other 2) parts of the transistor. This causes the transistor to degrade to the point that it stops functioning. degrade
CHANNEL REGION

Sakamoto: '893 Patent Sakamoto:

GATE
(P) DRAIN

(P) SOURCE

N

FIG. 9 PRIOR ART

Sakamoto: '893 Patent

Invention

Sakamoto: '893 Patent Sakamoto:
Using a curved, recessed gate to create a longer Using channel without increasing the size of the transistor. channel
GATE
SOURCE DRAIN

Prior Art

Channel
GATE
SOURCE DRAIN

Invention