新しい固定砥粒パッドによるのセミドライ加工方法の研究

Semi-dry polishing method for silicon oxide wafer CMP with Spiral type Fixed Ceria Abrasive polishing pad is proposed in this paper. High MRR of 400nm/min and high WIWNU of 8% are obtained by this method. Semi-dry pol ishing method is one of the method of slurry free CMP and is the new method using small amount of pure water instead of slurry and chemical liquid. Key technique of this method is how to control the amount of pure water on the pad surface before pol ishing. Control technique is examined, and polishing mechanism is discussed.textapplication/pdfdepartmental bulletin pape

Observation of B̅0→DsJ*(2317)+K- Decay

journal articl

Solar neutrino measurements in Super-Kamiokande-II

The results of the second phase of the Super-Kamiokande solar neutrino measurement are presented and compared to the first phase. The solar neutrino flux spectrum and time variation as well as oscillation results are statistically consistent with the first phase and do not show spectral distortion. The timedependent flux measurement of the combined first and second phases coincides with the full period of solar cycle 23 and shows no correlation with solar activity. The measured 8B total flux is (2:38± 0.05(stat.)/begin+0.16 // -0.15/end (sys.)) × 10^6 cm^{-2} s^{-1} and the day-night difference is found to be (-6.3 ±4.2(stat.)±3.7(sys.))%.There is no evidence of systematic tendencies between the first and second phases.journal articl

Mesosoma (side view) of a female of (Parque Nacional Soberanía, Panamá, CWEM)

<p><b>Copyright information:</b></p><p>Taken from "The ants of North and Central America: the genus (Hymenoptera: Formicidae)"</p><p>Journal of Insect Science 2004;4():-.</p><p>Published online 24 Aug 2004</p><p>PMCID:PMC1081568.</p><p>Copyright © 2004. Open access; copyright is maintained by the authors.</p

Mesosoma and petiole (side view) of the holotype worker of (modified from )

<p><b>Copyright information:</b></p><p>Taken from "The ants of North and Central America: the genus (Hymenoptera: Formicidae)"</p><p>Journal of Insect Science 2004;4():-.</p><p>Published online 24 Aug 2004</p><p>PMCID:PMC1081568.</p><p>Copyright © 2004. Open access; copyright is maintained by the authors.</p

Mesosoma, petiole and postpetiole (side view) of a female of (Río Frijolito, Panamá, CWEM)

<p><b>Copyright information:</b></p><p>Taken from "The ants of North and Central America: the genus (Hymenoptera: Formicidae)"</p><p>Journal of Insect Science 2004;4():-.</p><p>Published online 24 Aug 2004</p><p>PMCID:PMC1081568.</p><p>Copyright © 2004. Open access; copyright is maintained by the authors.</p> The inset shows the scutellum and propodeum as seen from above

Pronotum and mesonotum (top view) of a worker of , showing the crown of spines on the promesonotum (modified from )

<p><b>Copyright information:</b></p><p>Taken from "The ants of North and Central America: the genus (Hymenoptera: Formicidae)"</p><p>Journal of Insect Science 2004;4():-.</p><p>Published online 24 Aug 2004</p><p>PMCID:PMC1081568.</p><p>Copyright © 2004. Open access; copyright is maintained by the authors.</p> All figures are oriented with the anterior end of the ant to the left