Development of high reliability chip tantalum capacitor for space

Transcription

1 R Technical Information A MA TSUO Development of high reliability chip tantalum capacitor for space Matsuo Electric CO., LTD

2 Contents Technical Information A MATSUO S tantalum capacitor was qualified JAXA CWS11. March (Capacitors, Chip, Solid, Electrolytic, Tantalum, High Reliability, Space Use) Overview of Tantalum Capacitor Overview and Structure of Chip Tantalum Capacitor Manufacturing Policy of Matsuo MATSUO supplies products in a wide range from high reliability applications to consumer applications. Concept of MATSUO S manufacturing. Overview of JAXA CWS11 and Reliability test results Overview of JAXA CWS11 (Chip Tantalum Capacitor ). High reliability test results. Summary

3 Overview of Tantalum Capacitor Technical Information A Overview of Tantalum Capacitor

4 Capacitor Classification Technical Information A Tantalum capacitor Electric double layer capacitor Film capacitor Capacitor MLCC Aluminum electrolytic capacitor

5 Subject Tantalum Capacitor MLCC Film Capacitor Aluminum Electrolytic Capacitor Electric double layer Capacitor Capacitor Classification Dielectric Ta 2 O 5 (Tantalum pentoxide) BaTi0 3 (Barium titanate ) Ti0 2 (Titanium oxide) etc. PET (polyethylene terephthalate) PP (polypropylene) PPS (polyphenylene sulfide) etc. Al 2 O 3 (Auminium oxide) - Relative dielectric constant 22~27 1,000~20, or less 2~3 8~10 Electrolyte (Cathode) Manganese dioxide Conductive polymer Electrolyte No No Electrolyte Conductive polymer Technical Information A Feature Miniature and high capacitance Long life Wide temperature range (-55~+125 ) Miniature and high capacitance Low ESR Miniature and high capacitance Long life and high reliability Low ESR Non polar Miniature Low ESR/Low ESL Wide voltage range High precision (Capacitance) Non polar Low ESR High capacitance Low price Miniature and high capacitance Low ESR Ultra high capacitance Low voltage JAXA-CWS11(Chip tantalum capacitor) : Tantalum Pentoxide (Ta2O5), dielectric film, is formed on surface of tantalum metal, and manganese dioxide is formed on its surface.

6 Technical Information A Overview of Tantalum Capacitor Tantalum capacitor Dielectric film : Very stable in thermal and in chemical. Manganese dioxide : Very stable inorganic solid. Stable electric characteristics at low and high temperature. Long life. Dielectric film : Thin, Uniformity, High insulation. Dielectric constant is approx. 3 times higher than the aluminum oxide film. Miniature and high capacitance

7 Technical Information A Structure of chip Tantalum Capacitor mark Polarity mark (Anode) Mold resin (Epoxy resin) Silver (adhesive) Cathode terminal Silver paste MnO2 layer (Manganese dioxide layer) Tantalum element Anode terminal Teflon Tantalum wire Reference: JAXA-ADS-2040/K201A

8 Technical Information A Basic Structure of Tantalum Capacitor Chip tantalum capacitor Basic structure and principle of function Basic structure figure ( Cross Section ) Mold resin Tantalum wire Teflon ring principle of function Cathode terminal Cathode terminal silver plating Silver (adhesive) Silver Paste (Dipping) Graphite layer Manganese dioxide layer(mno 2 ) Dielectric(Ta 2 O 5 ) Tantalum(Anode) Cathode layer Anode terminal Cathode terminal Tantalum Anode read)

9 High Reliability Equipment MATSUO S Products (Chip Tantalum Capacitor) Matsuo s chip tantalum capacitors have a wide range line-up from high reliability equipments to consumer equipments (ultra miniature). For Space JAXA CWS11 Technical Information A For automotive High Reliability for High Temp. 271N High heat resistance For Automotive 267N Miniature AEC-Q200 For Automotive 252M Face-Down Terminal Automotive Industrial Equipment Safety Built in Fuse 269M,E High Reliability Standard Series Extend Cap. Series 267M 267E High Performance Low ESR 281M Ultra Low ESR Built in Pb Free Fuse 279M,E Conductive polymer TCA Consumer Equipment Miniature Low Profile Low Profile (1.2mm max.) 277M,E Miniature (2012size) 278M Face-Down Terminal Ultra miniature Ultra Low Profile High capacitance Ultra miniature High Volumetric efficiency (1005,1608,2012,3216,3528size) 251M Ultra Low Profile (0.6,0.8mm max.) 251T Ultra Low ESR Conductive Polymer TCB

10 Manufacturing Policy of Matsuo Technical Information A MATSUO supplies products in a wide range from high reliability applications to consumer applications.

11 Classification of Suitability for Market Technical Information A Market Classification Overview Application Guidelines High Reliability Equipment 1 High reliability equipment Aerospace (satellite, rocket) Military Automotive Industrial Equipment 2 3 Automotive equipment Industrial equipment Electric equipment for Automotive General industrial equipment Automotive electronics application. (Engine, Drive, Break) ECU (Electronic control unit ). Industrial equipment ( High end ). Automotive electronics application. (air conditioner, car navigation) controlled equipment for Industrial. Design Process Quality Consumer Equipment 4 Consumer products Mobile phone, DSC, DVC, PDA. Audio Visual Application. Hearing aid. Home electronics, PC, Office LAN. Market is divided into three fields, the application is classified into four classes. Guidelines (Design, Process, Quality ) has specified for each class.

12 Process control not make a failure Technical Information A Failures in Soldering Most of the Ta Capacitor s failures is Short or Increase of leakage current at soldering process, because of thermal stress. Bathtub Curve Tantalum capacitor is initial failure type, and the failure rate is reduced as time passed. The initial failure rate is reduced and high reliability is maintained by proper screening in manufacturing process. Bathtub Curve 耐熱初期不良 Failures in soldering バスタブカーブ Failure rate 故障率 %/1000H %/1000H 初期故障 Initial failures 磨耗故障 Wear-out failures 偶発故障 Random failures 時 間 Time

13 Technical Information A Manufacturing process of chip tantalum capacitor 13 Process Chart Process Delineation PRESSING Cathode Layer Forming SITERING BAR WELDING FORMATION IMPREGNATION &PYROLYSIS RE-FORMATION CATHODIZING ANODE LEAD WELDING Anode process Anode process Assembly process The process for manufacturing the internal element (Pellet) of tantalum capacitor [Pressing ~ Cathodizing ] Assembly process for chip capacitor [ Anode lead welding ~ Markings ] VISUAL INSPECTION RESIN MOLDING MARKING PRODUCT INSPECTION LEAD FORMING/ PACKING QUALIFICATION TEST Assembling process Inspection and Packaging process Inspection Packing process The process of inspection and packing the capacitor [ Inspection ~ Packaging ]

14 Technical Information A Capacitors Design and Process control of high reliability product Process Subject High reliability product Manufacturing Process Qualification Test Tantalum Powder Formation (dielectric formation) Tantalum element visual inspection Strength test (Extraction) Product inspection JAXA-QTS-2040 Group-A Test All Components To use the powder of highest purity for high quality. To apply conditions for high-quality. Special design for high reliability. Visual Inspection for all components before resin molding. Strength test of welding point and connecting point. Special inspection. Aging and Surge 100% inspection. Reflow conditioning:ensure failure in soldering Thermal shock : Ensure initial failure Surge current Test: Ensure initial failure Voltage aging (Burn-in): Ensure initial failure By proper screening in manufacturing process, the initial failure rate is reduced and high reliability is maintained.

15 Technical Information A Overview of JAXA CWS11 (Chip Tantalum Capacitor) Overview of JAXA CWS11 Capacitors, Chip, Solid, Electrolytic, Tantalum, High Reliability, Space Use

16 Technical Information A Overview of JAXA CWS11 (Chip Tantalum Capacitor) Lineup Rated voltage : 4~50V Maximum capacitance : 100µF 5 case size 3216 ~ 7343H Overview Line-up to low ESR product (10V-68µF 7343H) less than ESR80mΩ(100kHz,RT) Durability125 4,000hr 100% surge inspection Reflow compliant Solder plating Application examples POL (Point of load) DC/DC converter MPU (Micro Processing Unite) IC etc.

17 Method of low ESR Technical Information A K 10V68µF,7343H ESR at100khz,rt (Ω) H Type MnO 2 二酸化マンガン 等価直列抵抗 (Ω) インピーダンス (Ω) ESR & Impedance (Ω) K Impedance 内部タンタル素子の表面積 surface area of internal (mm2) element(mm 2 ) 0.1 ESR K K K M M 周波数 (Hz) Frequency(Hz) MATSUO S Tantalum Capacitors have an excellent reputation for frequency dependence of ESR by own pelleting and a cathodizing technology.

18 Technical Information A JAXA CWS11 (Chip Tantalum Capacitor Line-up) Rated Voltage (VDC) A A Case code EIA CODE L±0.2 W±0.2 T± A B A A B B A B C D A B C 3 H 7343H A B C A B C3 Capacitance (µf) 1.5 A B C3 D A B C3 D3 3.3 A B C3 C3 D3 4.7 B C3 D3 D3 6.8 B C3 D3 D3 10 B C3 C3 D3 D3 15 C3 C3 D3 D3 22 C3 C3 D3 D3 33 C3 D3 D3 47 D3 D3 D3 68 D3 D3 H 100 D3 D3

19 Test Results ( Life test :JAXA-QTS-2040) JAXA CWS11FH107J : 10V-68µF,7343H (For Example) Technical Information A 静電容量変化率 Capacitance (%) Change (%) 誘電正接 DF (%) (%) 等価直列抵抗 100kHz ESR(Ω) (Ω) ,10V N=206 JAXA CWS11 F H 686 (10V-68μF 7343H ケース n=206) 6% 0.1Ω Capacitance 静電容量変化率 Change (%) (%) 誘電正接 DF (%) (%) 100kHz ESR(Ω) 等価直列抵抗 (Ω) ,6.7V N=24 JAXA CWS11 F H 686 (10V-68μF 7343H ケース n=24) ±10% ±10% 6% Leakage 漏れ電流 current (μa) (µa) uA Leakage 漏れ電流 current (μa) (µa) uA 0.01 初期値 Initial Time 時間 (h) 0.01 初期値 Initial Time 時間 (h) As a test result, no failure and all characteristics meet the required performance.

20 Life Test Results (JAXA-QTS-2040) Technical Information A Subject Life 85,Rated voltage JAXA-QTS-2040 K Life 125,De-rating voltage JAXA-QTS-2040 K Product No, (J CWS11) CH107J [4V-100µF] NH475J [50V-4.7µF] FH686J [10V-68µF] CH107J [4V-100µF] NH475J [50V-4.7µF] FH686J [10V-68µF] Sample Number (p) Failure Number (p) Component hour 2,000h 4,000h at 4,000h , , , , , ,000 Total ,760,000 Failure rate (at 4,000h) 0.033%/1,000h (Confidence level60%) Failure rate is 0.033%/1,000h. (No Failure)

21 SUMMERY Technical Information A MATSUO S chip tantalum capacitor was solely qualified JAXA CWS11 (Capacitors, Chip, Solid, Electrolytic, Tantalum, High Reliability, Space Use) in Japan. (March ) We would like to contribute to progression at space development. While maintaining high reliability. Targeting high performance. (low ESR) Miniaturizing

22 Technical Information A Capacitors Thank you for your attention.