2000 5 6 15 36 105-0003 2-11-9 6F TEL 03-3539-7071 FAX 03-3539-7072 http://www.idema.gr.jp 7 http://www.idema.gr.jp/qsem/qsem_home.htm 7 14 1 http://www.idema.gr.jp/class/class_home.htm 25 5 19 ( ) 26 6 16 ( ) 1 13:00 17:00 10,000 12,000
HDD HDD HDD HDD HDD HDD IDEMA Japan News No. 36 2
1. HDD 20 1Gbits/in 2 HDD 21 2. 1 HDD Desktop PC 3.5 HDD Portable PC 2.5 HDD HDD 1 1 HDD 1 HDD TMR Track Misregistration TMR SNR 2 2 R&D 2 100 IDEMA Japan News No. 36
3 TMR Co SNR Co 50Gbits/in 2 Co Co Pt Ku Co Co 3 150 200Gbits/in 2 Co 400Gbits/in 2 Co TMR 3. TMR 3 IDEMA Japan News No. 36
6 TMR 4 HDD PES Position Error Signal 4 FFT PES 5 5 Ave. 3 1 Specific Modulus HDD Ave. 3 6 Ave. 3 10 6 IDEMA Japan News No. 36
7 NSIC 100Gbits/in 2 580KBPI 170KTPI 10000rpm 3.0 1.0 7200rpm HDD 3.0 1.27 2.5 0.89 10000rpm 100Gbits/in 2 TMR 100Gbits/in 2 HDD HDD 4. 7 3 3 Co CrMo CoCrPtTa NiAl NiAl Co CoCrPt Si Cr 7 0.25Hz IDEMA Japan News No. 36
Co Co Co 7 Dynamic Remanence Coercivity 7 Hcr Co 7 Co 7 Co 7 Switching Volume Dynamic Remanence Coercivity Dynamic Remanence Coercivity Co Co Co and/or Co 5. 2.5 1.27 2.5 HDD 6. HDD 21 HDD HDD HDD 21 HDD IDEMA Japan News No. 36
Disk vibration vs. TMR * LDV FFT DAD:Disk Axial Displacement Po wer spectral of the Disk Axial Displacement PES:Position Error Signal VCM SERVO FFT Cumulative TMR = 3σ = 3 Diskmodes axialvariance= σ f 0 PSD 2 = f 0 PES ( f ) df PSD DAD ( f ) df Po wer spectral of the Position Error Signal CTMR Axial Disk Modes We can estimate TMR from the axial disk modes by disk vibration measurement. *Jeffrey S.McAllister, Th e effect of d isk platter reso nances on tr ack misreg istration in 3.5 inch disk dr ives IEEE Trans.Mag n.,vo l.33,pp.1762-1766,1996 IDEMA 11/5/99 4 TMR
基 板 振 動 特 性 ( 変 位 量 共 振 周 波 数 ) Axial displacement :3 σ [um] 1.0 0.8 0.6 0.4 0.2 0.0 Al 3.5" x 1.27 Al 3.5" x 0.8 Gl 3.0" x 1.0 BW=3.2[kHz] 0 5000 10000 15000 Revolution[rpm] Axial displacement:3σ[um] 1.00 0.10 0.01 Axial Disp. 1 / F(n,m) Rev.[rpm] 5400 10000 15000 0 500 1000 1500 2000 Frequency of the 1st. bending mode: F(0,1)[Hz] Fig. Disk axial displacement vs. rpm for the various disks Fig. Freq. of the 1st. Bending mode vs. Disk flatter Fig. Waterfall plot of the disk vibration vs. rpm IDEMA 11/5/99 Frequency of the 1st bending mode:f(0,1)[hz] 1600 1400 1200 1000 800 600 400 F E/ρ Current servo band width 2.5" x t0.635 5 3.5" 3.0" x t1.27 2.5"xt1.0 t1.27 t1.0 t0.8 3.0" x t1.0 F t 20 30 40 50 Specific modulus : E/ρ Fig. Freq. of the 1st. Bending mode vs. Specific modulus
HOYA 2.5 3.5 3.5 2.5 1 1999 12 10 / 60-80% 2000 30 / 2002 70-100 / 35 / 10-15 / 30-40nm 30 / 18nm Ra 0.2nm Rmax 3.0nm Ra 10 10nm 10m (LZT) 10 IDEMA Japan News No. 36
Ra Load/Unload Load/Unload 1 HDD 100-400G 100-400G 200G 2 IDEMA Japan News No. 36 11
1 2 2 Na K KNO3 400 16 Li Na KNO3 NaNO3 4 ( 150 ) 3 AFM 100nm 10nm Track isregistration (TMR 5400rpm 7200rpm 10000rpm 12000rpm 3 AFM 4 4 TMR F( rpm) a 2 1 W = 3 4 Eβh λ 2 ( ν ) W F(rpm) E h W h a E W HDD 12 IDEMA Japan News No. 36
4 TMR 3.5 3.0 36% 30% 150GPa 3.5 70GPa 2.5 5 Quantum TMR TMR Al2O3 ZrO2 SiC 2 2 Al 3.5inch/0.8mm ( 6) 150GPa 1.5 2 150GPa 215GPa ZrO2 TMR 150GPa 0.8mm 1.1mm Al 3.5 2.5 Al 2.5 Al 5 2.5 Al 3 3.5 IDEMA Japan News No. 36 13
2 5 TMR 6 14 IDEMA Japan News No. 36
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HDD 98 1 4251 22.1% 1-a 98 99 99 1-b HDD 2000 2000 1Q 231 1$ 110 2 6 98 235 1.8% 1-a HDD 99 3Q WD IBM Maxtor 6 Maxtor 2-a HDD 200 180 160 Sh 140 ip 120 m 100 80 en 60 40 20 0 19891990199119921993199419951996199719981999 CY 50 45 40 35 Sa 30 les 25 20 ($ 15 10 5 0 Shipment Sales 1-b 1999 HDD 1999 1 7394 2-b 3 3 60,000 50,000 Shipment (k/q) 40,000 30,000 20,000 10,000 0 1Q 99 2Q 3Q 4Q CY 2 HDD 1998 3 Seagate Quantum WD 3 IBM Maxtor 99 3-a c 4 Quantum Seagate WD Maxtor 4 19 IDEMA Japan News No. 36
Revenue ($M/Q) 70% HDD IIT 1999 12 WD 97 9 99 3,000 2,500 2,000 1,500 1,000 500 3-a 0 1Q 97 2Q 3Q 4Q 1Q 98 2Q 3Q 4Q 1Q 99 CY 2Q 3Q 4Q Seagate Quantum Maxtor WD Sales ($M/Q) 6,000 5,000 4,000 3,000 2,000 1,000 0 1Q 97 3-c 2Q 3Q 4Q 1Q 98 2Q 3Q 4Q 1Q 99 CY 4 HDD HDD PC 2003 3 2002 A/V HDD 99 2004 5 15.6% 1999 132 2004 109 99 229 2004 393 99 2004 11.3% 35% 30% 25% 20% 15% 10% 5% 0% 2Q 3Q 4Q 4 HDD Inventory/Sales FGI WIP RAW Sales 3-b 400,000 350,000 40,000 35,000 Net Income ($M/Q) 300 200 100 0-100 -200 Seagate Quantum Maxtor WD Shipment (k/y) 300,000 250,000 200,000 150,000 100,000 50,000 0 1999 2000 2001 2002 2003 2004 CY 30,000 25,000 20,000 15,000 10,000 5,000 0 Revenue ($M/y) Shipment Revenue -300 1Q 97 2Q 3Q 4Q 1Q 98 2Q 3Q 4Q 1Q 99 2Q 3Q 4Q CY IDEMA Japan News No. 36 20