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1

2 HDD 1-1 HDD HDD HDD ()

3 1-3 HDD 1-3 HDD GMR 1-4 HDD HD-DVD Blu-ray Disc HDD 25 HDD 26 TMR Seagate Technology ( GST) 3 HDD HDD 1-4 HDD 13Gb/inch 2 3 HDD TMR 2

4 HDD HDD 1-4 HDD [DTM] [] (Gb/inch2) 2 ) HDD HDD HDD 4 3 HDD LSI HDD HDD AV HDD JEITA() HDD 1 2 1) 1) [ ] 3

5 1-5 HDD 27 3 HDD HDD Trace Storage Technology () TDK GST TDK TDKSAE Magnetics Headway Technologies 4

6 HDDHard Disk Drive PCT/ PATOLIS (a) 1998 (b) (a-b) 3, ,65 2,595 4,6 75 3,931 2,182 3, ,982 2,256 3, ,529 1,47 6, ,111 3,919 2, ,618 () 17,79 12,422 11,929 () DERWENT WPI 7,4 1,3 EPDEFRGB ITCHNLDKSE ATBEFILI

7 HDD (1) HDD % ,5 4, 3,5 3, 2,5 2, 1,5 1, % % 6% 54% (2) % ,5 2, 5% 2% 1% % 1,5 1, % 6

8 % HDD ,6 1,4 1,2 1, % 34% 2% 1% 58% (3) % 7

9 , 4, 6, 8, 1, 12, % 6% 34% 54% 1%, 2% % 5% 92%, 1,964 48%, 24%, 1%, 8%, 19%, 5%, 36%, %. 21%, 38%, 58%, 4,271 34%, 2,553 1%, 5% 2%, 1 11,929 1,337 1,279 7,418

10 % 37 6% 18 47% ,7 1% 4 33% 95 2% 4% 94% 1,4 2% % 2% % % 56% 71% 5% % 5% 19% 38 % 25% 19% 5% 1,987 4,45 46% 1,868 2, 2, 2, 2, 1,5 1,5 1,5 1,5 1, 1, 1, 1,

11 HDD HDD HDD Head Disc Head control Mecha Electric cont Head Disc Head control Mecha Electric cont Head Disc Head control Mecha Electric cont Head Disc Head control Mecha Electric cont 1

12 % % 8% 6% 4% 2% % Head Disc Head Mecha Electric control cont % 8% 6% 4% 2% % Head Disc Head Mecha Electric control cont

13 HDD TDK AV Seagate 3 TDK TDK ( TDK HOYA(183) ( TDK 292 Seagate Technology 18 2 IBM Seagate Technology Seagate Technology Western Digital 131 Seagate Technology 117 Western Digital Seagate Technology41 36 (29) Maxtor76 36 Texas Instruments 33 IBM(26) IBM73 25 IBM

14 2-3-1 GMR TMR MR 1) 7 MR MR AMR 1) AMR GMR GMR TMR MR MR TMR GMR ) MR GMR TMR MR MR AMR(Anisotropic magnetoresistance) HDD MR 13

15 CPP-GMR TDK TMR CPP-GMR Seagate Technology Seagate Technology TDK CIP-GMR Seagate Technology TDK Seagate Technology TDK Seagate Technology

16 2-3-3 HDD Seagate Technology Seagate Technology 26 HDD ( )

17 TDK Seagate TDK Seagate Technology TDK Seagate Technology

18 a DFHA HDI b c CSS dvcm VCM e f , 13% 158, 7% 596, 26% (11, 5%) (31, 15%) (465, 23%) VCM 249, 11% VCM (193, 1%) 272, 12% 699, 31% (217, 11%) (719, 36%) 1999 ~25 [ ] 17

19 2-3-7 TDK Seagate Seagate 9 Seagate VCM TDK Seagate Technology V C M TDK V C M [ ] 18

20 a b chdd HDD d (121, 8%) ( 172, 12%) (938, 64%) (111, 15%) (86, 11%) (421, 55%) ( 239, 16%) (144,19%) [ ] [ ] , 13% 475, 51% , 14% , 12% 14 95, 1% 2 [ ] 19

21 HDD HDD PRML(Partial Response Maximum Likelihood) HDD FPC(Flexible Printed Circuit)IC HDD AV HDD HDD HDD, 271,16%, 19, 6%, 443, 27%, 152, 17%, 49, 6%, 223, 25%, 222, 13%, 182, 2%, 289, 17%, 364, 21%, 113, 13%, 169, 19%

22 PLL(Phase-Locked Loop) MR GMRTMR HDD 3 Texas Instruments HDD Seagate Technology [] [] Texas Instruments IBM 12 Infineon Technologies 12 Agere Systems 11 Seagate Technology

23 HDD HDD AV RAID(Redundant Arrays of Inexpensive Disks) HDD HDD HDD / HDD RAID HDD, 181, 8%, 187, 8%, 657, 31%, 1, 4%, 19, 8%, 54, 23%, 232, 1%, 245, 11%, 318, 14%, 41, 18%, 59, 26%, 34, 14% , , 18, 8%, 41, 17% HDD AV HDD

24 4 HDD CPP MR 7 CPP MR AMR GMR (MR) CIP(Current-in-plane) MR CPP(Current-perpendicularto-plane) TMR CPP-GMR BMR MR TMR TMR CPP-GMR TMR CPP-GMR TDK TMR CPP-GMR TMR TDK CPP-GMR TDK

25 3 1) 2) 3) Bs TDK Seagate TDK Seagate Technology

26 2 (Ku) Co/Pd,Pt L1 ECCCGC CoCr CoCr CoCrCoCrPt CoCrPtTa CoCr 24 25

27 HDD [ ] [ ]

28 TPTP(Thermal Pole Tip Protrusion) PRML(Partial Response Maximum Likelihood) 199 EPRML(Extended PRML) EEPRML(Enhanced Extended PRML)MEEPRML(Modified Enhanced Extended PRML) Turbo LDPC(Low Density Parity Check) PRML % FIR(Finite Impulse Response) AGC(Automatic Gain Control) AGC PLL(Phase-Locked Loop) PLL Turbo LDPC(Low Density Parity Check) PLLPRMLAGCTurbo LDPC TPTP, 9, 9%, 9, 9%, 32, 33% TA, 16, 8% Turbo LDPC, 31, 15%, 5, 2%, 59, 28%, 22, 23% , 25, 26% AGC, 33, 15% PLL, 35, 16% PRML, 34, 16%

29 CM CM % 8% , 16, 2%, 24, 2%, 12, 1%, 5, 5%, 6, 6%, 8, 8%, 1, 1%, 923, 95%, 75, 8% , 129, 14%, 146, 15%, 447, 48%, 22, 23% 28

30 HDD 1nm 1nm TDK DTM1; DTM2;( ) PTM1;() PTM2;() TDK Seagate Technology PTM1 PTM2 DTM1 DTM2 [ ]

31 Seagate Technology JSTPlus ) 1, HDD [] HDD 1) 3

32 Data Storage Inst.(SG) [ ] INSPEC HDD HDI INSPEC )1, ) IEEEAIP,APSASME 31

33 Seagate Technology 22 IBM HDD Seagate Data Storage Inst (19, 8%) (448, 32%) (143, 11%) (644, 49%) (43, 3%) (268, 19%) (524, 38%) (517, 4%) [ ] [ ] 3-5 (64, 5%) (89, 7%) (3, 2%) (66, 46%) 3-6 [] (98, 7%) (43, 33%) [ ] Data Storage Inst. California Univ. Seagate Technol. IBM Carnegie Mellon Univ. 32

34 3-7 Seagate Technol.(US) IBM(US) Carnegie Mellon Univ.(US) Data Storage Inst.(SG) California Univ.(US) [ ] 1995 HDD 1995 NEDO GB HDD HDD HDD NEDO NEDO NEDO IT NEDO 33

35 HDD NIST National Institute of Standards and TechnologyNSFNational Institute of Standards and Technology DARPA (Defense Advanced Research Projects Agency) DARPA (Defense Advanced Research Projects Agency) HDD 2 MEMS Institute for Information Storage Technology (IIST) at Santa Clara University Data Storage Systems Center (DSSC) at Carnegie Mellon University Center for Magnetic Recording Research (CMRR) at UC San Diego Center for Micro Magnetics and Information Technologies (MINT) at University of Minnesota Materials Research Science and Engineering Center (MRSEC) at University of Alabama 4-2 HDD HDD )

36 HDD HDD HDD 3 7, , , , HDD OEM , HDD 7, 6, 5, 4, 3, 2, 1, , 45, 4, 35, 3, 25, 2, 15, 1, 5, 5, 45, 4, 35, 3, 25, 2, 15, 1, 5, 5-2 HDD OEM OEM , 16, 14, 12, 1, 8, 6, 4, 2, OEM P9126 P P

37 HDD 5-3 HDD 3.5 ATA ATA GB211 15GBNAND ipodmini NAND ( 7, 6, 5, 4, 3, 2, ATA 3.5ATA 2.5/3.5SCSI 5-3 HDD 1, HDD 5-4 PC Non-PC Non-PC 5-4 HDD 7, ( 6, 5, 4, 3, 2, Non-PC PC 1, [] P15,P ATAAdvanced Technology Attachment(AT Attachment) HDD 36

38 HDD 5-5 HDD HDD Maxtor Quantum 23 IBM HDD Seagate Technology Maxtor HDD HDD a2 HDD b22 HDD 4.% 5.% Western Digital 1.% 3.% 6.% Seagate Technology 2.% Quantum 15.% 5.8% 4.4% IBM 12.5% 5.% 3.2% Seagate Technology 27.5% 12.% IBM 12.% Maxtor 13.% Western Digital 15.1% Maxtor 26.4% 13 P c25 HDD d26 HDD 7.% 8.7% 6.8% Cornice.2% GS Magic.1% Seagate Technology 29.4% 9.1% 1.8% 7.7% Cornice.2% Seagate Technology 36.3% Maxtor 14.8% GST 14.9% Western Digital 18.1% GST 16.4% Western Digital 19.4% b 23 P c 26 P d 27 P

39 HDD Maxtor Seagate Technology Maxtor Seagate Technology 3.5/2.5 SCSI Seagate Technology 3.5/2.5 SCSI 3.5 ATA 2.5 ATA GST GST Seagate Technology 27 Apple ipod Seagate Technology GST HDD 26 GST 14.9% a3.5/2.5 SCSI b3.5 ATA GST 1.1% 25.3% Seagate Technology 59.8% 14.4% Western Digital 3.1% Seagate Technology 45.5% 8.3% c2.5 ATA d1.8 Western Digital 5.2% GST 23.4% 16.8% GST 29.% Seagate Technology 18.2% 22.5% Western Digital 4.1% Cornice 2.4% e1. Seagate Technology 31.6% 76.6% 2.4% GST 23.5% 27 P

40 HDD , , TDK , 9, 26 1,8 8, Seagate 1,6 7, 1,4 4.4% Technology 6, 32.2% 1,2 5, 1.% 1, 4, 8 Western 3, 6 Digital 4 2, 12.8% 2 1, GST 14.9% () () , % 4, Seagate Technology GST 5-9 1,2 1, , 5, 4, 3, 2, 1, P197( 5-7)P134( 5-9) 26 P278( 5-7)P29( 5-9) 27 P34( 5-7)P35( 5-8)P227( 5-9)P228( 5-1) () () TDK 25.7% Seagate HOYA Technology 3.1% 23.4% 5.% DT 12.2% GST 14.6% Komag 2.4% 21.2% 39

41 HDD NAND HDD NAND GB 26 32GB HDD MLC 11 1GB HDD HDD IBM IBM HDD TMR CoCrPt SN TMR MgO MR ( 1-4) Seagate Technology Seagate Technology ( 2-3-7) Seagate Technology ( 3-7) Seagate Technology Seagate Technology 2122 ( 3-6) ( 3-2) 7 11 HDD HDD 89% 66% 1 TDK2 3 Seagate Technology ( ) 1 4

42 2 75% Seagate Technology 2 Seagate Technology ( ) Seagate Technology * 2 ()6 ()3 ()1 19 ()4 () ()13 ()9 ()5 ()8 ()1 ()1 ()1 14 ()2 ()1 275 ()4 181 ()4 [ ] HDD HDD , , Maxtor Seagate Technology 7 1 Seagate Technology2 Western Digital % 5-5(d) PC HDD ) 1) Fourth_Quarter_and_Year-End_26_Results&vgnextoid=f76b814fef83e1VgnVCM1dd49aRC RD 2) 3) 41

43 GST HDD HDD HDD TDK 2 5-8TDK TMR Komag() HOYA 5-1 HDD 5-5 5% 5-5 AV HDD 2 ) HDD ivdr 1) NHK 16 2) HDD HDD ) 32GB HDD HDD 16GB 1GB HDD HDD 1) ivdrinformation Versatile Disk for Removable usage 2 2)

44 Seagate Technology TMR 274Gbit /inch 2 5 Gbit/inch 2 HDD TMR HDD Seagate Technology TMR CPP-GMR CPP-GMR MIG MR GMR GMR 13 TMR CPP CPP-GMR CPP-GMR AV HDD HDD HDD AV AV HDD AV AV HDD ( 2-4-1) HDD TMR HDD HDD AV HDD HDD HDD 43

45 HDD 4 NEDO SRC HDD ( 4-2) Seagate Technology HDD TMR 5 3% ( ) 1) TMR MEMS 44

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