Introduction to Semiconductor Manufacturing Technology. Chapter 1, Introduction. Hong Xiao, Ph. D.
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1 Introduction to Semiconductor Manufacturing Technology Chapter 1, Introduction Hong Xiao, Ph. D. Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 1
2 Objective After taking this course, you will able to Use common semiconductor terminology Describe a basic IC fabrication sequence Briefly explain each process step Relate your job or products to semiconductor manufacturing process Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 2
3 Topics Introduction IC Device and Design Semiconductor Manufacturing Processes Future Trends Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 3
4 Introduction First Transistor, AT&T Bell Labs, 1947 First Single Crystal Germanium, 1952 First Single Crystal Silicon, 1954 First IC device, TI, 1958 First IC product, Fairchild Camera, 1961 Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 4
5 First Transistor, Bell Lab, 1947 Photo courtesy: AT&T Archive Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 5
6 First Transistor and Its Inventors John Bardeen, William Shockley and Walter Brattain Photo courtesy: Lucent Technologies Inc. Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 6
7 First IC Device Made by Jack Kilby of Texas Instrument in 1958 Photo courtesy: Texas Instruments Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 7
8 First Silicon IC Chip Made by Robert Noyce of Fairchild Camera in 1961 Photo courtesy: Fairchild Semiconductor International Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 8
9 Moore s Law Intel co-founder Gorden Moore notice in 1964 Number of transistors doubled ever 12 months while price keeping unchanged Slowed down in the 1980s to every 18 months Amazingly still correct, likely to keep until Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 9
10 Moore s Law, Intel s Version Transistors Pentium III 10M 1M Pentium 100K K 1K Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 10
11 IC Scales Integration level Abbreviation Number of devices on a chip Small Scale Integration SSI 2 to 50 Medium Scale Integration MSI 50 to 5,000 Large Scale Integration LSI 5,000 to 100,000 Very Large Scale Integration VLSI 100,000 to 10,000,000 Ultra Large Scale Integration ULSI 10,000,000 to 1,000,000,000 Super Large Scale Integration SLSI over 1,000,000,000 Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 11
12 Road Map Semiconductor Industry Minimum feature size (µm) DRAM Bits/chip 64 M 256 M 1 G 4 G 16 G 64 G volume (millicents) Microprocessor Transistors/cm 2 4 M 7 M 13 M 25 M 50 M 90 M volume (millicents) ASIC Transistors/cm 2 2 M 4 M 7 M 13 M 25 M 40 M volume (millicents) Wafer size (mm) (?) Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 12
13 Feature Size and Wafer Size Chip made with 0.35 µm technology with 0.25 µm technology with 0.18 µm technology Chip or die 300 mm 200 mm 150 mm Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 13
14 Smallest Known Transistor Made by NEC in 1997 Source Lower gate Upper gate Dielectric Drain n + n + P-type substrate Ultra shallow junctions micron lower gate width Photo courtesy: NEC Corporation Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 14
15 Limit of the IC Geometry Size of the atom Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 15
16 Limit of the IC device Atom size: several Å Need some atoms to form a device Likely the final limit is around 100 Å or 0.01 micron. About 30 silicon atoms Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 16
17 IC Design: First IC Photo courtesy: Texas Instruments Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 17
18 IC Design: CMOS Inverter V in V dd (a) NMOS PMOS V ss V out N-channel active region N-channel Vt N-channel LDD N-channel S/D Shallow trench isolation (STI) P-channel active region P-channel Vt P-channel LDD P-channel S/D (b) P-well Metal 1 Polycide gate and local interconnection N-well Contact Metal 1, AlCu W PMD n + P-Well n + P-Epi STI P-Wafer p + p + N-Well (c) Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 18
19 IC Design: Layout and Masks of CMOS Inverter CMOS inverter layout Mask 1, N-well Mask 2, P-well Mask 3, shallow trench isolation Mask 4, 7, 9, N-Vt, LDD, S/D Mask 5, 8, 10, P-Vt, LDD, S/D Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 19 Mask 6, gate/local interconnection Mask 11, contact Mask 12, metal 1
20 Mask/Reticle Pellicle Chrome pattern Phase shift coating Quartz substrate Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 20
21 A Mast and a Reticle Photo courtesy: SGS Thompson Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 21
22 Wafer Process Flow Materials IC Fab Metallization CMP Dielectric deposition Test Wafers Masks Thermal Processes Implant PR strip Etch PR strip Packaging Photolithography Final Test Design Hong Xiao, Ph. D. www2.austin.cc.tx.us/hongxiao/book.htm 22
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