Archived posting to the Leica Users Group, 2008/05/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hexagons! Do they really use a saw these days, or a cnc cutter that could easily cut any shape they want? Tom On May 10, 2008, at 4:17 PM, Frank Filippone wrote: > Having made this suggestion tongue in cheek, let me address the > problems.... > > First, there were and probably are circular chips made. Not many, > but some. > > When you make a wafer of chips, you then CUT the wafer into many > parts, > called chips ( ! ). This is done with a saw. First in horizontal > rows > then in vertical rows. Pretty easy. Straight cuts. > Ever try to cut a round thing out?? Ain;t easy. > Second, if you ( could ) make round chips, you would waste the area > between > the circles.... draw it and you will see what I mean. Waste is not > in the > IC designers' dictionary. > So mostly all chips are rectangular. > > Now let's consider circuit elements on the chip. > Some truly are not rectangular. But again there must be a reason > else you > are wasting chip area. > > It has been 40 years since I actually made an active device in a > lab. Too > long ago to remember all the reasons you do not want a circular > circuit > element. > > > Frank Filippone > red735i@earthlink.net > > > > Why not a circular sensor? Aren't the chips manufactured on circles? > Tom > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information