【文章內(nèi)容簡(jiǎn)介】 if both colors are shown. Intensity of color indicates relative strength. Figure 169。 2023 by Prentice Hall Semiconductor Manufacturing Technology by Michael Quirk and Julian Serda G r o u p N u m b e r Ch a r a c t e r is t ic sIA ? 1 v a l e n c e e l e ct r o n t h a t is e a sil y g iv e n u p 。 lo w e le c tr o n e g a tivi t y? Hig h l y u n s ta b l e? V e r y r e a ct ive 。 e xp lo siv e? F o r m s i o n ic b o n d s? P r e fe r n o t to u se th e m e ta ls in t h is g r o u p d u e t o c o n t a m in a ti o n is su e sII A ? 2 v a l e n c e e l e ct r o n s? S o m e wh a t u n st a b le? Q u ite r e a ct iv e? P r e fe r n o t to u se m e ta ls i n t h is g r o u pIIIA ? 3 v a l e n c e e l e ct r o n s? Do p a n t e le m e n ts ( p r im a r il y B) a d d e d t o s e m ic o n d u ct o r m a te r i a l? Co m m o n in t e r c o n n e c t co n d u ct o r m a t e r ia l ( A l)I V A ? 4 v a l e n c e e l e ct r o n s? S e m ico n d u ct o r m a t e r i a ls? F o r m s co v a le n t b o n d sCharacteristics of Chemicals used in Wafer Fabrication Continued on next slide Table 169。 2023 by Prentice Hall Semiconductor Manufacturing Technology by Michael Quirk and Julian Serda Gr o u pNu m b e rCh a r a c t e r is t ic sVA ? 5 v a l e n c e e l e ct r o n s? Do p a n t e le m e n ts ( p r im a r il y P a n d As)V I A ? 6 v a l e n c e e l e ct r o n sV II A ? 7 v a l e n c e e l e ct r o n s。 r e a d il y a cce p ts e le ct r o n s。 h ig h e l e ct r o n e g a tivit y? Co r r o siv e? V e r y r e a ct ive? F o r m s i o n ic b o n d s? Use fu l in s o m e s e m ico n d u ct o r a p p li ca tio n 。 d a n g e r o u s e tc h in g a n d cle a n in gco m p o u n d sV II I A ? 8 v a l e n c e e l e ct r o n s? S ta b le 。 n o n r e a ct ive? In e r t g a s? S a fe t o u se i n s e m ic o n d u ct o r m a n u f a ct u r i n gIB ? B e st m e t a l co n d u ct o r s? Cu is r e p l a cin g Al a s p r im a r y i n t e r c o n n e ct co n d u c to r m a te r ia lI V B – V I B ? Re fr a ct o r y ( h ig h m e lti n g te m p e r a t u r e ) m e ta ls co m m o n l y u se d in s e m ico n d u ct o rm a n u f a ct u r in g t o im p r o ve m e ta ll i z a tio n ( e sp e cia ll y T i, W , M o , T a , a n d C r )? Re a ct s w e ll w i th s il i co n t o fo r m s ta b le c o m p o u n d w ith g o o d e le ct r ic a lch a r a ct e r isti csCharacteristics of Chemicals used in Wafer Fabrication (continued) Table 169。 2023 by Prentice Hall Semiconductor Manufacturing Technology by Michael Quirk and Julian Serda Ionic Bond for NaCl Cl Na+ Figure 169。 2023 by Prentice Hall Semiconductor Manufacturing Technology by Michael Quirk and Julian Serda Cl 17 H 1 Hydrogen atom Chlorine atom H + Cl ? HCl Electron shared between two atoms to form a covalent bond. Covalent Bond for HCl Figure 169。 2023 by Prentice Hall Semiconductor Manufacturing Technology by Michael Quirk and Julian Serda Classifying Materials ? Conductors ? Insulators ? Semiconductors 169。 2023 by Prentice Hall Semiconductor Manufacturing Technology by Michael Quirk and Julian Serda Electrical Current Flow Figure Copper wires provide connections that allow electrons to flow from the terminal, through the filament inside the lamp, and back into the + terminal of the battery.