Effect of tungsten content on friction welding of copper-tungsten sintered alloy to oxygen free copper. (Report 2). Effect of tungsten content on bond strength of friction welded joint of copper-tungsten sintered alloy to oxygen free copper.

the washback effect of discretepoint vs. integrative tests on the retention of content in knowledge tests

در این پایان نامه تاثیر دو نوع تست جزیی نگر و کلی نگر بر به یادسپاری محتوا ارزیابی شده که نتایج نشان دهندهکارایی تستهای کلی نگر بیشتر از سایر آزمونها است

Breakdown Studies in Tungsten and Copper Structures

Tungsten Nitride Barrier/Tungsten Via to Copper Interconnect for Memory Device Applications

In this paper, we report a novel, high productivity and low cost integration scheme for copper interconnects in memory devices using a tungsten nitride barrier and a tungsten via. Key integration challenges overcome in this work include zero sputter Cu2O reduction, damage-free conformal WN barrier deposition, void-free W fill, and W CMP with minimal dishing, plug coring, or barrier erosion. Ele...

Numerical and Experimental Studies on the Explosive Welding of Tungsten Foil to Copper

This work verifies that the W foil could be successfully welded on Cu through conventional explosive welding, without any cracks. The microstructure was observed through scanning electron microscopy (SEM), optical microscopy and energy-dispersive X-ray spectrometry (EDS). The W/Cu interface exhibited a wavy morphology, and no intermetallic or transition layer was observed. The wavy interface fo...

effect of oral presentation on development of l2 learners grammar

this experimental study has been conducted to test the effect of oral presentation on the development of l2 learners grammar. but this oral presentation is not merely a deductive instruction of grammatical points, in this presentation two hypotheses of krashen (input and low filter hypotheses), stevicks viewpoints on grammar explanation and correction and widdowsons opinion on limited use of l1...