DRAM 커패시터 용 TiN 박막 전극의 스퍼터링 공정 최적화

• 영문명: Optimization of the Sputtering Process for TiN Thin Films as Electrodes in DRAM Capacitors
• 발행기관: 한국세라믹학회
• 저자명: 조석호(Seokho Cho) 이웅규(Woogkyu Lee)
• 간행물 정보: 『세라미스트』제28권 제1호, 117~125쪽, 전체 9쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2025.03.31

국문 초록

The metal/insulator/metal capacitor structure demands high capacitance density and effective leakage current suppression. Titanium nitride (TiN), with its suitable work function (∼4.3 eV) and exceptional thermal stability, is a widely adopted electrode material. TiN thin films deposited via Radio frequency (RF) sputtering ensure superior interface quality and device reliability due to precise compositional control, high deposition rates, and minimal contamination. In this study, TiN deposition was optimized using RF sputtering by systematically adjusting deposition parameters, including pressure, plasma power, and gas flow rate. As a result, the resistivity of TiN was successfully reduced to 140.0 μΩㆍcm under optimal conditions: deposition pressure of 0.3 mTorr, plasma power of 200 W, and an argon gas flow rate of 35 sccm. This optimized TiN sputtering process was applied to the bottom electrode of TiO₂-based capacitors, achieving a dielectric constant of 37 and maintaining a low leakage current, demonstrating its suitability for high-performance capacitor applications.

목차

1. 서론

2. 실험방법

3. 본론

4. 결론

REFERENCES

키워드

Capacitors Electrode Resistivity RF sputtering Titanium nitride