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A Study on the High Viscosity Photosensitive Polyimide Degassing and Pumping System

반도체 생산공정을 위한 고점도 감광성 폴리이미드 탈포 및 공급시스템에 관한 연구

  • 박형근 (남서울대학교 전자공학과)
  • Received : 2014.10.07
  • Accepted : 2015.02.12
  • Published : 2015.02.28

Abstract

As the wire bonding process has been converted into BUMP process due to the high density integration of semiconductor chip, the telecommunication line connecting to semiconductor chip and external devices have become finer. As a result, a more precise work is necessary. However, it is difficult to control quantity given the nature of high viscosity of PSPI and the yield rate continues to decline due to the inflow of bubble. Therefore, this paper developed the D&P(degassing and pumping) system to remove and supply gas that is generated from coating the high viscosity photosensitive polyimide(PSPI) in the semiconductor BUMP process.

반도체 칩의 고집적화로 과거 와이어 본딩 공정에서 BUMP 공정으로 전환되면서 반도체칩과 외부 기기로 이어지는 통신선도 더욱 미세해짐으로 인해 보다 정밀한 작업이 필요한 실정이지만 PSPI의 고점도 특성상 정량제어가 어렵고 버블유입에 따른 수율의 저하가 계속되고 있는 실정이다. 따라서 본 논문에서는 반도체 BUMP 공정에서 고점도 감광성 폴리이미드(PSPI : Photosensitive Polyimide)의 도포(coating)시 발생하는 기포(gas)를 제거하여 공급하는 D&P(Degassing and Pumping) 시스템을 개발하였다.

Keywords

References

  1. Korea semiconductor industry association, http://ksia.or.kr, Understanding of semiconductor and status of semiconductor industry
  2. Hyoung-Keun Park, "Study on the FPCS for Photoresist Coating of Semiconductor Manufacturing Process", Journal of the Korea Academia-Industrial cooperation Society, Vol. 14, No. 9, pp.4467-4471, September 2013. DOI: http://dx.doi.org/10.5762/KAIS.2013.14.9.4467
  3. Hyoung-Keun Park, Keun-Wang Lee, "Development of DWCCS for Chemical Temperature Control of Semiconductor Manufacturing", International Journal of Control and Automation, Vol. 6, No. 3, pp.125-132, June 2013
  4. Villegas I, Napolitano P., "Development of a continuous-flow system for the growth of compound semiconductor thin films via electrochemical atomic layer epitaxy", Journal of the Electrochemical Society, Vol. 146, No. 1, pp. 117-124, Jan. 1999 DOI: http://dx.doi.org/10.1149/1.1391573
  5. Chiu WKS, Jaluria Y, "Continuous chemical vapor deposition processing with a moving finite thickness susceptor", Journal of Materials Research, Vol. 15, No. 2, pp.317-328, Feb. 2000 DOI: http://dx.doi.org/10.1557/JMR.2000.0050