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  • 1. MLCC ♦ MLCC (Multi Layer Ceramic Capacitor) : ♦ classification - C: NPO, COG : ε ~ ≤30: - B: X7R: ε ~ 3,000 : -55 ~125oC: ±15% - F: Y5V: ε ~ 12,000: -25 ~85oC: -20 ~ + 80% ♦ electrode: from Ag-Pd to Ni (sintering in reducing atmosphere) ♦ about 250 C and 15 L components / mobile phone ♦capacitance range : current: pF ~ 1µF, near future: pF ~ 50µF ♦ size: current: 1005, near future: 0603 - 0402 Advanced Electronic Ceramics I (2004) MLCC의 분류 용량 전압(V) 1pF 6 l 10 10pF 16 l 25 100pF 50 l 100 Dimension EIA Code 1nF 200 Code l 250 L W T (Max) BW 10nF 300 0201 0.60 0.30 0.30 0.15 0603 l 500 0402 1.00 0.50 0.50 0.20 1005 100nF 630 l 1,000 1608 0603 1.60 0.80 0.80 0.30 1uF 1,500 0805 2.00 1.25 1.25 0.50 2012 l 2,000 1206 3.20 1.60 1.60 0.50 3216 10uF 2,500 l 3,150 1210 3.20 2.50 2.50 0.60 3225 100uF 4,000 1812 4.50 3.20 2.50 0.80 4532 5,000 2220 5.70 5.00 2.50 1.00 5750 10,000 Advanced Electronic Ceramics I (2004)
  • 2. MLCC의 분류 Class I Class II 온도 범위 -5 5 ~ +1 2 5 C 온도 계수 ( ppm/C) ;유효숫자*승수 공차 ( ppm/C) 온도 범위 용량 변화율 유효숫자 기호 승수 기호 값 기호 저온( C) 기호 고온( C) 기호 값( %) 기호 0 .0 C -1 0 +-3 0 G +1 0 Z +4 5 2 +-1 .0 A 1 .0 M -1 0 1 +-6 0 H -3 0 Y +6 5 4 +-1 .5 B 1 .5 P -1 0 0 2 +-1 2 0 J -5 5 X +8 5 5 +-2 .2 C 2 .2 R -1 0 0 0 3 +-2 5 0 K +1 0 5 6 +-3 .3 D 3 .3 S -1 0 0 0 0 4 +-5 0 0 L +1 2 5 7 +-4 .7 E 4 .7 T +1 5 +-1 0 0 0 M +1 5 0 8 +-7 .5 F 7 .5 U +1 0 6 +-2 5 0 0 N +-1 0 .0 P +1 0 0 7 +-1 5 .0 R +1 0 0 0 8 +-2 2 .0 S +1 0 0 0 0 9 +2 2 , -3 3 T +2 2 , -5 6 U COG (NPO) +2 2 , -8 2 V F B Class I Class II - Small loss, high IR, high stability - high dielectric constant - Linear and moderate TC between +100and -1500ppm/oC - temperature dependence of the capacitance is large Advanced Electronic Ceramics I (2004) MLCC: X7R 1. The most popular intermediate dielectric-constant materials. 2. Increasingly important as the improvement of the integration technology enables the high capacitance with lower temperature coefficient (possibility to replace the Ta capacitor) ε ~ 3,000 : -55 ~125oC: ±15% From http://www.sem.samsung.co.kr/product/ca/mlcc/information.pdf Advanced Electronic Ceramics I (2004)
  • 3. MLCC: Y5V High dielectric constant with high temperature coefficient SrTiO3 shifter CaCO3 depressor From http://www.sem.samsung.co.kr/product/ca/mlcc/information.pdf Advanced Electronic Ceramics I (2004) MLCC: Technical Trends: 1. High Capacitance http://www.sem.samsung.co.kr Advanced Electronic Ceramics I (2004)
  • 4. MLCC: Technical Trends: 2. Miniaturization http://www.sem.samsung.co.kr Advanced Electronic Ceramics I (2004) MLCC: Technical Trends: 3. Base-Metal Technology http://www.sem.samsung.co.kr Advanced Electronic Ceramics I (2004)
  • 5. Multi Layer Ceramic Capacitor C = nε0εrA/t C: Capacitance n: number of layer ε0 : permittivity in vacuum εr : dielectric constant A: area t: thickness For high C in small volume n↑, t ↓ (1005→ 0603 → 0402) Ni electrode for cost reduction Advanced Electronic Ceramics I (2004) 전자신문 Advanced Electronic Ceramics I (2004)
  • 6. 삼성전기(대표 강호문)는 지난달부터 0603 크기의 적층세라믹콘덴서(MLCC)를 월 2000만개씩 양산, 기존 1608 크기의 MLCC보다 공급단가가 최소 100배 이상 비싼 고수익 부품사업 확대에 본격 나섰다. 특히 1005와 0603형 크기의 극소형 MLCC 생산비중을 현재 15%선에서 연말까지 30%대로 높일 계획이다. 업계 관계자들은 “범용 부품의 경우 가격경쟁이 치열해 수익성이 떨어지는 반면, 고부가 제품들은 매출 및 수익성 창출효과가 크다”면서 “수동부품업체들이 범용 제품 생산기지를 중국 및 동남아로 이전하는 대신 국내 공장은 고부가 제품 위주로 빠르게 생산구조를 재편하는 추세”라고 강조했다. 전자신문 2002년 9월 5일자 Advanced Electronic Ceramics I (2004) Multi Layer Ceramic Capacitor Powder preparation technique 1. Solid State Reaction (past) 2. Hydrothermal (current) 3. Coprecipitation (current) Starting particle size : < 0.5 µm - particle size↓ → surface area ↑ → additive content↑ → difficult to increase solid loading → advanced dispersion technique is required Advanced Electronic Ceramics I (2004)