Slide 1: R&D Center
R&D Center, Karuizawa, Japan R&D Center, PMDM GmbH, Bang Pa-in, Thailand Villingen, Germany R&D Center Technical Center, R&D Center, Michigan, USA Chai Chee, Singapore March 23, 2001 0
Slide 2: R&D Center agenda
7． R&D Center 1. Collaborated Organization and Its Major Activity Fields. 2. HDD Major Technology. 3. Sustaining The HDD Technology Innovation (Spindle Motor and Pivot Assy.). - Grease Development for RO (Ball) Bearing - Steel Alloy Development (Free-Machining Stainless Steel) 4. Chemical Integratio
Slide 3: Collaborated Organization and Its Major Activity Fields
7． R&D Center 1. Collaborated Organization and It’s Major Activity Fields. Technical Center (USA) Karuizawa R&D PM DM GmbH (7) Center (17) (2) Cleanliness Technology Tribology Lab. Metal Surface Bearing Evaluation Lab. (5) Treatment Lab. (6) (3) (3) Thai R&D Center S’pore R&D Center Shanghai R&D Cen
Slide 4: HDD Major Technology
7． R&D Center 2. HDD Major Technology. zCHANNEL INTEGRATION －R/W CHANNEL －CODING －SERVO zMECHANICAL INTEGRATION － HEAD/DISK TECHNOLOGY － OTP/TMR zCHEMICAL INTEGRATION － RELIABBILITY － CLEAN TECHNOLOGY Spindle Motor/Pivot Assembly March 23, 2001 Mechanical integration and chemical integration are fac
Slide 5: Innovation (Spindle Motor and Pivot Assy.)
7． R&D Center 3． Sustaining The HDD Technology Innovation (Spindle Motor and Pivot Assy.). SPINDLE MOTOR PIVOT zHigher Rotational Bearing zLess Access Time Steel Ball (Grease Development) Less Hystersis Ceramic Ball Thermal Expansion Matching zLess Noise zLess Friction Torque Bearing Cleanliness Imp
Slide 6: Lubricating Grease Structure
7． R&D Center 3． Sustaining The HDD Technology Innovation (Spindle Motor and Pivot Assy.). LUBRICATING GREASE STRUCTURE SOAP SOAP (Li、Na….) THICKENER ORGANIC (UREA,PTFE) NON-SOAP INORGANIC (SILICAGEL, TREATED CLAY) MINERAL (PETROLEUM) GREASE BASE OIL SYNTHETIC (POLY-α-OLEFIN, DIBASIC ACID ESTER, POL
Slide 7: Old and Current Li Soap, New Li Soap
7． R&D Center 3． Sustaining The HDD Technology Innovation (Spindle Motor and Pivot Assy.). Old and Current Li Soap New Li Soap March 23, 2001 As thickner in the grease for high-speed rotation RO bearings, Minebea changed lithium soap from 12-hydro stearic acid lithium to stearic acid lithium. We hav
Slide 8: Steel Alloy Development (Spindle Motor and Pivot Assy.)
7． R&D Center 3． Sustaining The HDD Technology Innovation (Spindle Motor and Pivot Assy.). Steel Alloy Development (Spindle Motor And Pivot Assy.) Spindle Motor Nonferrous Metal 6061T-6 Hub Stainless Steels SUS430F QSF190L DHS-1 (Ferritec) SF-20T Pivot Assy. Stainless Steels NBK3HM Ferritec Type Sha
Slide 9: SUS 430F (Mn/S Ratio 4.43)
7． R&D Center 3． Sustaining The HDD Technology Innovation (Spindle Motor and Pivot Assy.). SUS 430F ( Mn/S Ratio ; 4.43 ) March 23, 2001 The photos show an electron microscopic view of the surface of SUS430F. The black dots are manganese sulfide. 8
Slide 10: Improvement of Sulfur Outgas on Alloy Steel
7． R&D Center 3． Sustaining The HDD Technology Innovation (Spindle Motor and Pivot Assy.). IMPROVEMENT OF SULFUR OUTGAS ON ALLOY STEEL SILVER COUPON CORROSION TEST MATERIAL SULFUR LEVEL Mn/S Cr(%) Ferritec SUS430F 5 4.5 17 DHS-1 0 1.2 19 Austenitec Stainless Steel SUS303Cu 2 5.0 17.8 ASK3000SM 1 5.0
Slide 11: Chemical Integration and Spindle Motor
7． R&D Center 4. Chemical Integration (Spindle Motor) CHEMICAL INTEGRATION AND SPINDLE MOTOR Thermal Asperity CONTAMINANTS RELIABILITY ANALYSIS METHOD Head Disk Hard Particle Interference LPC Stiction SEM/EDX Organics (Silicone, Amine) FT-IR Corrosion Siloxisane DHS-GC-MS Sulfur Lock Ionics ESCA(XPS
Slide 12: Chemical Integration and Spindle Motor
7． R&D Center 4. Chemical Integration (Spindle Motor) CHEMICAL INTEGRATION AND SPINDLE MOTOR Electrostatic Spectroscopy for Chemical Analysis (X-Ray Photoelectron Spectroscopy) March 23, 2001 The photo on the left shows an electrostatic spectroscopy for chemical analysis of an extremely thin surface
Slide 13: Chemical Integration Supports HDD Components Technology
7． R&D Center 5. Summary Chemical Integration Supports HDD Components Technology Spindle Motor Outgas RO (Ball) Bearing FDB Grease Oil Cleanliness Precision Machining March 23, 2001 For mass-production of high-performance and highly reliable spindle motors, it is essential to integrate outgassing co