Area of the Wafer

  • Thread starter onqun
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  • #1
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Hello guys, I have an upcoming test. When I was doing a question about finding the area of the wafer. it is circular. In the solution manual it says pi*r^2 / 4 . I do not understand where 1/4 comes from. Since it is circular , I assumed the pi*r^2 would be fine.
 

Answers and Replies

  • #2
dlgoff
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Usable area? I could see a little waste but not that much.
 
  • #3
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it just says compare the areas of wafers for the gven diameters .
 
  • #4
13
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nevermind i just found d=2r ;lol sorry
 

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