Non-destructive Inspection of Semiconductor Package by Laser Speckle Interferometry

레이저 스페클 간섭법을 이용한 반도체 패키지의 비파괴검사

  • Published : 2005.04.30

Abstract

This paper proposes a non-destructive ESPI technique to quantitatively evaluate defects inside a semiconductor package. The inspection system consists of the ESPI system, a thermal loading system and an adiabatic chamber. The technique is high feasibility for non-destructive testing of a semiconductor and overcomes the weaknesses of previous techniques, such as time-consumption and difficult quantitative evaluation. Most defects are classified as delamination defects, resulting from the insufficient adhesive strength between layers and from non-homogeneous heat spread. Ninety percent of the tested samples had delamination defects which originated at the corner of the chip and nay be related to heat spread design.

본 논문에서는 반도체 패키지 내부결함의 비파괴 정량평가를 위한 ESPI 기법을 이용한 시스템 및 검사기 법을 제안하고 있으며, 검사시스템은 ESPI 검사장치, 열변형유도장치, 단열챔버로 구성되어있다. 기존 초음파, X-ray 기반의 검사기법에 비하여 측정시간 및 검사방법이 용이하며, 결함의 정량검출이 가능하다는 장점이 있다. 검사결과에서 대부분의 결함이 열 방출이 많은 칩 주위에서 박리결함으로 나타났으며, 원인은 층간 접착강도의 약화와 열분배 설계에서 문제점인 것으로 사료된다.

Keywords

References

  1. 반도체 결함의 패턴인식을 위한 신경 회로망 운영과 디지털 초음파 탐상원리의 응용 김훈조
  2. Reliability to Electronic Package Kim, Young-Ho;Lee, Soon-Bok
  3. NDT & E International v.35 Wavelet analysis based deconvolution to improve the resolution of scanning acoustic microscope images for the inspection of thin die layer in semiconductor Jhang, K.Y.;Jang, H.S.;Park, B.G.;Ha, J.;Park, I.K.;Kim, K.S. https://doi.org/10.1016/S0963-8695(02)00028-2
  4. Microelectronics Reliability v.44 Sub-pixel image correlation: an alternative to SAM and dye penetrant for crack detection and mechanical stress localization in semiconductor packages Goh, J.Y.L.;Pitter, M.C.;See, C.W.;Somekh, M.G.;Vanderstraeten, D. https://doi.org/10.1016/S0026-2714(03)00162-8
  5. Holographic and Speckle Interferometry Jones, R.;Wykes, C.
  6. Applied Optics v.30 no.13 Image processing algorithms for the analysis of phase-shifted speckle interference pattern Henri, A.V.;Mass, Ad.A.M.
  7. Optical Methods of Engineering Analysis Cloud, G.L.