Effectiveness of X-ray grating interferometry for non-destructive inspection of packaged devices

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


It is difficult to inspect packaged devices such as IC packages and power modules because the devices contain various components, such as semiconductors, metals, ceramics, and resin. In this paper, we demonstrated the effectiveness of X-ray grating interferometry (XGI) using a laboratory X-ray tube for the industrial inspection of packaged devices. The obtained conventional absorption image showed heavy-elemental components such as metal wires and electrodes, but the image did not reveal the defects in the light-elemental components. On the other hand, the differential phase-contrast image obtained by XGI revealed microvoids and scars in the encapsulant of the samples. The visibility contrast image also obtained by XGI showed some cracks in the ceramic insulator of power module sample. In addition, the image showed the silicon plate surrounded by the encapsulant having the same X-ray absorption coefficient. While these defects and components are invisible in the conventional industrial X-ray imaging, XGI thus has an attractive potential for the industrial inspection of the packaged devices.

Original languageEnglish
Article number134901
JournalJournal of Applied Physics
Issue number13
Publication statusPublished - 2013 Oct 7

ASJC Scopus subject areas

  • Physics and Astronomy(all)


Dive into the research topics of 'Effectiveness of X-ray grating interferometry for non-destructive inspection of packaged devices'. Together they form a unique fingerprint.

Cite this