itsallabtamrit
New Member
can anyone tell me what is meant by WAFERS in IC'S..?And why it is used..
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Papabravo said:As an intellectual exercise you might want to compute how many rectangles measuring L by W you can fit on a circular disc of diameter D. For extra credit you can compute the amount of waste as a percentage of the original area.
Guys who can do this are in high demand.
Yeah, it's kinda like guys who can calculate the product of two huge numbers in their heads - neat trick, but who needs it?Nigel Goodwin said:Wouldn't 15 minutes with any programming language easily produce a program that could do it?.
Ron H said:Yeah, it's kinda like guys who can calculate the product of two huge numbers in their heads - neat trick, but who needs it??
He reminds me of the kind of person who could always cut the tension at a meeting / boring seminar with a witty one liner. I always tried to sit beside those guys, made the event much more memorable, and I usually retained whatever it was I was supposed to get from the assemblage.Ron H said:Do I detect some cynicism from Papabravo?
I'd say, 5 minutesWouldn't 15 minutes with any programming language easily produce a program that could do it?.
#include <iostream>
#include "../_aux/_maths/constants.hpp"
void main()
{
[INDENT]int _nRects = 0;
int _nDiam = 0;
int _nLength = 0;
int _nWidth = 0;
std::cin >> _nLength;
std::cin >> _nWidth;
std::cin >> _nDiam;
_nRects = (_nLength*_nWidth)/(((_nDiam/2)*(_nDiam/2)) * _aux::_maths::constants::pi);
std::cout << "The approximated number of rects fitting into the circle is:" << _nRects << " ." << std::endl;[/INDENT]
}
Guys who can do this are in high demand.
As I said above,Papabravo said:I notice on the actual wafer that some chips just goe right up to the edge and there are some empty spots. That's why I think this problem is more involved than it looks.
Nox is strangely silent on this. He's on line, but he may not be watching this thread.Ron H said:Well, I don't code, but that looks like the die area divided by the wafer area. Isn't that inverted? And it doesn't seem to account for the wasted partial dice around the edge, which is the hard part.
indeed - to be honest, i couldn't find this thread.Nox is strangely silent on this. He's on line, but he may not be watching this thread.
sure - but this will not decrease the number of dies fitting on the wafer.there need to be separation between 2 dies (to cut them)
I've said <<[...] which cannot be calculated exactly [...]>>... of course you can calculate[...] the minimum and the average, so some numbers can be made
sure it does! But you can add this space to the chips' own area. So nothing is wasted ( in mathematical sense =) )also the separation does takeaway wafer space altough it would be a small thing,
it's not a program - just some equations.but for your program its not wasted space but needed space