Senthil Kumar

“Emerging Memory Trends and Career Opportunities”

By

Chinnu SenthilkumarGeneral Manager Engineering

India Device Design Centre

Private Limited

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Down the Memory Lane…

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Early Stages of Memory - Punch cards

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Early Stages of Memory - Tape Drive

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Early Stages of Memory - Magnetic disc

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Semiconductor Memories - Volatile

Present Generation SRAM

Features: Fast access, Low Power, High Cost, Volatile Applications: Cache Memory

DRAM Features: Med access, High Power, High density, Low

Cost, Volatile Applications: DIMM and RIMM cards in PC

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Semiconductor Memories: Non-Volatile

FLASH NOR

Features: Random Access, Med Density, Med Power, Multi-Level

Applications: Boot block, Code storage

NAND Features: Sequential access, High Density, Reliability, Low

Cost/bit, Low Power, Multi-Level Applications: MP3 Players, Digital Camera, Cell Phone SD

Cards, PDAs, USB Sticks etc…

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Consumer Electronics Requirements

Reasonable Access Time

High Density meeting Mass Storage requirements (in 10s of GB range)

Non-Volatility Feature as in Flash Memory

All the above with Low Process Cost Low Standby Power 

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Semiconductor Memories Comparison

Comparative Study of Semiconductor Memories

DRAM SRAM NAND FLASH

Write Speed Moderate Fast Moderate

Read Speed Moderate Fast Fast

Density Medium Low High

Power High Moderate Low

Refresh Yes No No

Retention No No Yes

Scalability Bad Good Good

Write/Erase Charge (Capacitance) CMOS Logic Charge (Tunneling)

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NOR Vs. NAND flash

NAND Flash - Overview

Introduction Applications

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Flash Memory – How does it work?

WL =0V

I 0nA

VTH = 4V

Programmed Cell

WL =0V

I = Sense Current

VTH = -1V

Erased Cell

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SLC Vs MLC

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NOR vs. NAND Flash - Applications

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NOR vs. NAND Flash – Market Growth

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Looking Forward…

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Where are we in this key segment?…

SanDisk Market Presence…

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SanDisk Mega Markets…

NAND flash Primarily used for bulk data storage Examples:

Music - MP3 players Digital Images - Digital cameras Videos - Camcorders Phone book/multimedia/ applications - Mobile Phones

& PDA Data - USB drives Games - PSP

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Opportunities…

Overview- Opportunities in Flash

Memory/Applications Sector

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Engineering Opportunities VLSI Design

Analog/Mixed Signal Design ASIC Design/Arch VLSI CAD Si characterization

Hardware System HW design System Validation

FW/SW Development Validation

CMOS Process

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Non-Engineering Opportunities

IT Supply Chain Management Business Intelligence Sales/Marketing Technical Support Center

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Companies in this sector…

SanDisk India operations started in Bangalore

Toshiba Samsung Apple Portal Player Intel AMD ST Microelectronics

….

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SanDisk India Business Objective

Incorporated in March 2005

Focus Areas Mixed Signal Chip design & development System design and Testing Embedded SW development/Testing

Future Plans Enterprise SW (Supply Chain Management) Customer return material QA

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Why SanDisk? Fastest Growing Company

Fortune ranked SanDisk as the 8th Fastest Growing Company in US

Fosters Creativity and Innovations Holds 400+ Key Patents in Flash Memory & Systems 2005 Royalty amounted to $200+ Million USD

Muti-Geographical Team Presence in US, Japan, Israel, India, Scotland, Taiwan,

Hong Kong

Opportunity to work in Cutting Edge Technology Advanced CMOS NAND Technology in Deep Sub-Micron Leader in NAND Technology & Controllers

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Key Executives

Top Notch Management Team CEO Dr. Eli Harari Ph.D, Princeton University

Pioneer in Non-Volatile Memory (from 1970s) Founded SanDisk and Wafer Scale Integration Listed in Forbes “America’s Most Powerful People”

COO Mr. Sanjay Mehrotra, MSEE, UC Berkeley Pioneer in EEPROM & Flash Memory Co-Founder of SanDisk

VP Dr. Khandker Quader, BSEE MIT, Ph.D UC Berkeley

Pioneer in Flash Memory and Key Contributor in NAND Memory Industry

Holds Several Patents and published articles

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India Management

SanDisk India GM, Chinnu Senthilkumar, BE Anna University, MSEE University of Utah

12+ Years of Experience in Analog/Mixed Signal Design & Development

Worked in Intel(Folsom, California) and Texas Instruments(India) in Technical & Managerial capacities

Holds 12 Patents (Approved and Pending) in the areas of Analog/Mixed Signal Design

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Thank You….

Q & A

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Back-up Slides

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NOR Vs. NAND flash