Jan 5, 2011 #1 S Santosh.K Newbie level 3 Joined Jan 4, 2011 Messages 3 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,299 Hi can any one explain why unit sized cap is always square. Thanks in advance.
Jan 5, 2011 #2 M manrajgujral Junior Member level 1 Joined Dec 10, 2010 Messages 19 Helped 19 Reputation 38 Reaction score 18 Trophy points 1,283 Location UK Activity points 1,455 Intresting, but i am not sure what you mean actually? what is a unit sized capacitor?
Jan 5, 2011 #3 S Santosh.K Newbie level 3 Joined Jan 4, 2011 Messages 3 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,299 In cmos process the capacitors which are used of some unit sizes depending on technology are called unit sized caps.
In cmos process the capacitors which are used of some unit sizes depending on technology are called unit sized caps.
Jan 5, 2011 #4 D dick_freebird Advanced Member level 7 Joined Mar 4, 2008 Messages 9,230 Helped 2,343 Reputation 4,707 Reaction score 2,583 Trophy points 1,393 Location USA Activity points 73,238 Squares pack nicely, and square maximizes (within ortho geometry anyway) the desired areal capacitance against the undesired periphery / fringe capacitance.
Squares pack nicely, and square maximizes (within ortho geometry anyway) the desired areal capacitance against the undesired periphery / fringe capacitance.
Jan 5, 2011 #5 S Santosh.K Newbie level 3 Joined Jan 4, 2011 Messages 3 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,299 Thanks,,, Does it add on to the error calculation like the ratio of perimeter to area...???
Jan 6, 2011 #6 leo_o2 Advanced Member level 4 Joined Sep 3, 2004 Messages 1,322 Helped 278 Reputation 558 Reaction score 241 Trophy points 1,343 Location China Activity points 5,761 In fact, you don't need to have square cap always. In many conmercial chips, other shape is used for unit-cap.
In fact, you don't need to have square cap always. In many conmercial chips, other shape is used for unit-cap.
Jan 7, 2011 #7 I ira2008 Junior Member level 2 Joined Sep 20, 2010 Messages 22 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,283 Location China Activity points 1,429 According to matching theory, you should keep perimeter comparing to area the more smaller it is, the better matching it is.
According to matching theory, you should keep perimeter comparing to area the more smaller it is, the better matching it is.
Jan 7, 2011 #8 Z zeldazzz Junior Member level 3 Joined Jun 23, 2005 Messages 27 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,445 probably, easy to manufacture. lower chance to get it wrong.