AN3994 datasheet(7/53 Pages) STMICROELECTRONICS

Part #	AN3994

Description	One of the bigger challenges

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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AN3994

ST multidrain technology evolution

Doc ID 022380 Rev 1

7/53

Figure 4.

ST’s HV technology evolution

The MD II generation has already optimized the RDS(on) * area of about 40% compared to

the first MD version, with an average value of about 30 m

Ω*cm2.

The excellent achievement of the MD II enabled STMicroelectronics to establish a new

milestone in the power switch arena with the last MD V generation.

Thanks to a proprietary ST technology, an extremely low value of p-column distance has

been reached, therefore overcoming the physical limit imposed by the diffusion process.

Additionally, the geometry of the p-columns was also optimized by a more effective diffusion

process which enabled up to 40% reduction of RDS(on) * area if compared to the previous

MD II generation.

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