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Characteristics of the Gases Emitted from Semiconductor Packing Plastics due to $\gamma$-ray Radiations
New Phys.: Sae Mulli 2017; 67: 1308~1311
Published online November 30, 2017;
© 2017 New Physics: Sae Mulli.

Donghoon OH*, Deokjoon CHA

Department of Physics, Kunsan National University, Gunsan 54150, Korea
Correspondence to:
Received September 29, 2017; Revised October 20, 2017; Accepted October 20, 2017.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
We measured the type and the amount of gas emitted by the plastic packing material for semiconductor packing when it was irradiated. In order to measure the gas emitted from the plastic material, we produced the plastic material in the form of a round bar. The plastic material was sealed with a glass tube and then irradiated with gamma rays from Co-60 (Cobalt-60) source. The irradiated gamma doses were 1 Gy, 1$\times$10$^2$ Gy, 1$\times$10$^4$ Gy, 1$\times$10$^6$ and 1$\times$10$^7$ Gy, and the tubes were classified according to the dose. Gamma-irradiated glass tubes were placed in a facility equipped with a GC analyzer to determine the amount and the type of gas in the glass tube according to the gamma dose. An analysis of the emitted gas confirmed that carbon monoxide, methane, carbon dioxide, and hydrogen carbon were generated. No emitted gas was observed at low doses; gas emission was confirmed as starting at 1$\times$10$^4$ Gy and increasing rapidly with increasing dose up to 1$\times$10$^6$ Gy.
PACS numbers: 81.05.Hd
Keywords: Gamma-ray, Epoxy molding compound (EMC), Gas emitted

March 2018, 68 (3)
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