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用于微型电子装置的玻璃布
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作者 方之 《玻璃纤维》 CAS 1998年第6期38-39,共2页
1序言收音机体积从大到小的演变,以及移动电话的出现,都离不开复合材料,因为用复合材料制成了印刷电路板。最早使用的印刷电路基板是纸基酚醛层压板,单面覆铜。在铜箔上,最初是用丝网印刷后来很快改用一种感光膜系统印出电路图,... 1序言收音机体积从大到小的演变,以及移动电话的出现,都离不开复合材料,因为用复合材料制成了印刷电路板。最早使用的印刷电路基板是纸基酚醛层压板,单面覆铜。在铜箔上,最初是用丝网印刷后来很快改用一种感光膜系统印出电路图,然后用蚀刻法显出铜的线道,代替以前... 展开更多
关键词 微型电子装置 玻璃布 玻璃纤维
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Morgan微型氧化铝陶瓷器件
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《电子产品世界》 2004年第09B期42-42,共1页
关键词 Morgan公司 氧化铝陶瓷器件 干燥压缩方法 微型电子装置
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Objects Obtained by y Quanta Irradiation with Threshold Energy of 10 MeV of Pure Gaseous He, under High Pressure, in CuBe2 Apparatus 被引量:1
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作者 Roland Wisniewski Alexander Yu. Didyk Teresa Wilczyfiska-Kitowska 《Journal of Physical Science and Application》 2015年第4期268-276,共9页
A HeHPC (Helium high pressure chamber) filled up with pure gaseous helium at initial pressure about 1.1 bar was irradiated by braking γ-rays of 10 MeV threshold energy during 1.0 × 10^5 s at the electron beam ... A HeHPC (Helium high pressure chamber) filled up with pure gaseous helium at initial pressure about 1.1 bar was irradiated by braking γ-rays of 10 MeV threshold energy during 1.0 × 10^5 s at the electron beam current 22 - 24 μA. After irradiation, the residual pressure inside was equal to 430 bar. Synthesized foils of black color and other multiple objects were found inside the HeHPC mainly at the entrance window for γ-rays made from beryllium bronze as a plug of beryllium bronze HPC, at the inner surfaces of the reaction chamber made of high purity copper and at the copper collector. The element analysis, using SEM (Scanning electron microscopy) and MPRA (Microprobe roentgen analysis), allowed us to establish that the foils consist predominantly of carbon and the smaller quantities of other elements from carbon to iron. An explanation for the observed elements is suggested on the basis of helium fusion reactions under the action of y-rays with the reactions taking place in giant stars (thermally activated). The possible mechanism after 3α reaction is nα reactions and under barrier reactions. A second experiment with initial pressure of 3.05 kbar (with pressure drop by about 65 bar - after almost the same procedure of y-rays irradiation and with fully beryl bronze environment) suggests another possible nuclear reactions - He(Be, p)C, He(C, γ)O, and so on. The developed approach agrees well with a series of studies carried out by the authors where dense hydrogen and deuterium gases are acted on by γ-rays in the presence or absence of metals in the reaction chambers. 展开更多
关键词 IRRADIATION high pressure HELIUM PACS 25.20.Dc 25.45.De.
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