ss_1 - 2.1. An interconnect is a small wire between two...

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Unformatted text preview: 2.1. An interconnect is a small wire between two points on a semiconductor device. For a copper interconnect with a rectangular cross section which is 5 pm wide, 1 pm thick, 3 1 mm long, estimate how many atoms are contained in the interconnect. :— \)\.'7/V\ MOM W3 M 2.4. Aluminum foil used for storing food weighs about 0.3g/in2. Estimate how many atoms are contained in one square inch of aluminum foil. Estimate the volume per aluminum atom and, from this, determine a dimension characteristic of a single aluminum atom. Compare your estimate value to the tabulated atomic radius for aluminum. I , 7,7,)! 33% um was; glfiLmigag/biéo “um/L"— ? 6.10mi)“ PPM—B 3 \iFmL; Q‘E%BL\O:7—ZHD@: 0'“ 0" 27> 3 .. : O‘\\\C/ ‘- .6WMD o~ MW h éfimtg‘k‘st \ ' v : ,7§§ 31% N \iwm‘v 3 7.53 M1930“ o N“ Woumb bmwmi pawsam 0.191: «m NR bx$CWM17 \S wh‘ww W K NT v.31, N23; Mobwuz, No Rumba-x mm P: 0&1 N35 coma; NQDMMR‘gD/ 0W»? Vsam may» cm Vs: \uiwtfib. 2.8. Iron (Fe), Cobalt (Co), and Nickel (Ni) are transition metals whose 3d shells are partially filled. Use the spdf notation to describe the electron configuration of each of these and briefly justify why all three have electronegativities of 1.8. (3?? 3T EMEE ZL Va 21 Co 754 \ 1 A a w. may as 3:“ w? M (D “ u 753“ p , u “ 3018 WE RM M W M _ 2.9. Write the electron configurations (spdf notation) characterizing Potassium (K) and Chlorine (Cl). Use these to rationalize the electronegativity of each element. N; wzvb E mmmmm‘ m 96‘", Dr “I 2‘1 ZY" 351 S" “5‘ (E m WEE 33 REE \s7' 2&2 2T6 1‘1 g“: : 0.33 \L .2 7:.D 6a Vomson was \x \Dbu euumz’mm game; \D$\L)Zr x» mm»; w\\L LEM; “— \mN k pom ‘3? 3M» . was \s W 5mm»: m.» M MW crest WW “3 ‘-\s sm. ‘ C\*kDVmE\ mm W M, W“: \k WM RWuLtAhqu‘ ,me‘i \T mm F\\L as ‘5? sm \§ \‘Y’ mm mm {cw/um WM wen—y, kp mum» wank gym LN \T mm k WNW Rank 3? U‘ $V‘<€ . 2.14. (a) Sketch a real-space picture of a chlorine atom using a planetary model. ([3) Sketch a qualitative energy-level diagram describing the electron energy states for a chlorine atom (the energy to remove a is electron from C1 is 2823 cV). {A \QQOMVL 3? \3— \e} 2&2 2‘; 755? 3‘5, 18. The figure below presents an energy—level diagram for an isolated carbon atom with its six electrons in the Sp3 hybridized configuration. Consider the case where such an atom is bombarded by electrons with an energy of 10 keV. Suppose an incident 10 keV electron collides with a carbon 15 electron and gives up 900 eV of its initial 10 keV. a) What is the energy of the incident electron E = 0 after the collision? b) What is the kinetic energy of the is electron after the collision? c) Assuming that after the collision the excited atom relaxes by X-ray emission, caicuiate the wavelength of the emitted X-ray. d) Suppose the incident beam of electrons is used to irradiate a material of unknown composition. How can the X-ray emission from the unknown sample (say a few grams of unknown metal) be used to determine what element(s) is present in it? E = -25eV E = -300eV 15 M. \ , \ ‘ ‘4 - mafia-5 \D‘Elfl I “JVW; Sid/HG, " Q’J’Z‘W’b 32/ $61 7" 56* M5 ‘06 '3, Hex is?“ g To \ \5 WSW-‘3 ~.-. {\M F SDPT )QQRV. ® 3 was; mamas WV [mus (new,ch wth ND> W nekueS Foil b~FFMEJ Wh‘s‘ and: CA» Nih— Wet-em OLLuEL W xii-db; MWSM ‘Hfi W37 oFBMMkaVSMungng-W y wasp-s ‘rv macaw W WV: as W W mmkfii ...
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ss_1 - 2.1. An interconnect is a small wire between two...

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