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本文研究了用四氟化碳-氧等离子体进行干法显影的电子束刻蚀技术。负型电子束抗蚀剂是由聚环己烯砜和2,6-双-(4'-叠氮苯亚甲基)-4-甲基环己酮组成,其灵敏度为1.5×10-5C/cm2,分辨率小于1μm,反差约1.43。并讨论了干法显影的影响因素和机理。 相似文献
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长征厂磁性材料车间磁学教研组热压铁氧体小组 《物理学报》1974,23(6):1-12
本文从实验上研究了起始粉料的制备方法和热压条件对磁头用的Mn-Zn及Ni-Zn热压铁氧体的密度、显微结构和磁性的影响。实验结果表明,化学共沉淀法制备的铁氧体粉料比氧化物法及硫酸盐法制备的要好。适当选择热压条件,可以获得晶粒分布均匀、晶粒大小不同(10μm—300μm)的高密度铁氧体;可以获得μ0=7420以及Bm=4950Gs的高密度Mn-Zn铁氧体和μ0等于100—2500的高密度Ni-Zn铁氧体。 相似文献
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本文对钕玻璃的光泵感应热畸变作了理论分析,给出了光泵感应热畸变与钕玻璃热光性质的关系,并对高重复率脉冲器件和单次脉冲器件作了热畸变的定量测量,实验结果在一定程度上与理论分析相符。 相似文献
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91.IntroductionTheso-calledWestwaterprocessisthecoordinateprocessunderthepolymermeasureu(g)in3-dimensionsconstructedbyWestwater(see[7,8]),andthepolymermeasurev(g)onCo([O,1]-R')isformallydefinedbywhereC,isthenormalization,gE[o,oo)isacouplingconstant,pistheWienermeasureonCo([o,11-R').Inarecentpaper(see[9]),weprovedthattheHausdorffdimensionofthesamplepathoftheWestwaterprocess{X,,t6[O,1]}isalsotwowithprobability1tou(g).Actually,weprovedin[9]thatgh(ImX)5C,y(g)-a.e.(1.1)m(ImX)5C,y(g)-a.e.(1.… 相似文献
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Gromnitskaya EL Yagafarov OF Stalgorova OV Brazhkin VV Lyapin AG 《Physical review letters》2007,98(16):165503
We present the ultrasonic study of gallium (Ga I) under high pressure up to 1.7 GPa, including the measurements of the density and elastic properties during phase transitions to Ga II and to a liquid state. The observed large drop of both bulk and shear moduli (by 30% and 55%, correspondingly) during the phase transition to Ga II, as well as the increase of the Poisson's ratio from typically "covalent" ( approximately 0.22) to "metallic" ( approximately 0.32) values, experimentally testifies to the coexistence of a molecular and metallic behavior in Ga I and to the disappearance of the "covalency" during the transition to Ga II. A high value of the pressure derivative of the bulk modulus for Ga I and the increase in the Poisson's ratio can be associated with the weakening of the covalency in compressed Ga I and considered as a precursor of the transition to normal metal. 相似文献
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In this paper, we propose an SU(4)×S3a scheme of the Straton Model and discuss the classification of mesons. We suggest the possible existence of several colour excited states with masses around 2 GeV in companion with charm mesons. We also discuss the properties and the experimental behavior of these colour excited states, especially, the possible contribution of these states in several new phenomena. 相似文献