why are platters round? lol

M

miggittymacdaddy

New member
whenever i see the platters, or disks, or whatever you call the round plates that cpu's are originally made of, i always wonder why they need to made onto this ROUND plate? where there is obviously ones on the edges that are getting cut though that become useless. compared to say an orthagonal or square shape that would give better use wouldnt it? image below if of one of these, just in case i'm not describing them right. thanks for curing my novice curiosity.

overclock3d.net/news.php?/cpu_mainboard/intel_nehalem_8_core_to_come_to_us_in_2009/1
 
I'm looking at the preparation as to the reason why.

Why the end results, such as disks are, that would involve it being easier for the disc to spin within the device rather than the device to spin or move around the disc.

If the 'disc' was square-ish, it wouldn't be so efficient a process. There would be runs of a head then a turn, then a run etc. Meaning the inside of the device would be circular, bigger than the square platter or disc inside. Size is important, or was important as is efficiency for the sake of it.

The sheets they cut the discs from, I'm sure the triangle-esq curved bits get reused as something.
 
I'm not entirely sure but I'm quite sure that it's because it naturally occurs when the material is spun and heated as well. I also think that the notion that you'd get more workable cores in a given area when opting for a circular wafer holds true. I'd imagine that the way the wafer is produced, the cores closer to the edge are weaker and more strained anyway. This would be in keeping with the idea that the better yielding CPU batches in terms of clockspeed/overclocks come from nearer the centre of the wafer?
 
Now that's a rather expensive game of frisbee. May as well go the whole way and play ultimate frisbee. Good fun, that :)
 
It's due to how they make the wafers in the first place.

Here's a good guide showing you how a CPU is made from start to finish :)

Dan
 
name='stuartpb' said:
It's so they can play frisbee when they are bored :D
Click to expand...

haha, deff the best reason.

but ok, now that i know how they are made, it makes total sense. i didnt know they were spun like that. the term wafer now helps in google searches also. lol. thanks for thee responses guys.
 
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