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  Wafer

Background
When microprocessors are produced, they are etched onto a flat round wafers of silicon, and then chopped up to yield a certain amount of processors per silicon wafer. Silicon wafer production began with small silicon wafers, and those wafers have now scaled up to 200mm (8 inch) and 300mm (12 inch) sizes. Microchip production / fabrication equipment capable of handling large 300mm wafers is capable of increasing the yield of chips per wafer by a large degree, and lowering total costs of chip production. Since wafers are round and chip dies are square or rectangular, you lose a certain amount of chips around the edges of a wafer, so there's a classic problem of fitting as many chips as you can onto a wafer.

Summary
Wafer is a program designed to graphically display the metrics of microprocessor production, with a focus on comparing the yields of 200mm and 300mm silicon wafers. Chip dies come in different sizes, typically between 50 square mm and 200 square mm, and amount of chips you can build on a given silicon wafer depends on that die size. Newer production technologies can fit more transisters onto smaller chip dies, but at the same time, the amount of transistors packed into microchips continues to increase at a rapid pace, such as specified by Moore's Law.

With Wafer, you can check out a close approximation of the amount of chips that companies like AMD, Via and Intel can build using different technologies.

Download
Wafer 2.13 application - 117 KB
Wafer 2.13 app and source code - 321 KB
Wafer.dat file - 7 KB

Change Log
Wafer 2.13 - February 20, 2003
- New chip data

Wafer 2.12 - September 2, 2002
- Updated QuickSelect interface
- Keyboard shortcuts (TAB & Shift-TAB)

Wafer 2.10 - April 10, 2002
- Margin (unusable area at wafer's edge)
- Ability to save CSV die data
- Ability to save "defaults setting", including default die width, height, spacer and wafer margin
- A new "auto-calc" feature which does a "fast-calc best fit bias" on QuickSelect or Refresh
- The ChipGeek auto-update feature takes the user to the Wafer page
- Plus, a few internal algorithms are more error-free. :)

Wafer 2.00 - April 1, 2002
- Free commented source code to Wafer available
- Ability to download wafer.dat updates separately
- New options for best-fit bias

Wafer 1.23 - March 21, 2002
- Cleaner interface
- Separate wafer.dat file that can be hand edited
- Much larger list of chips to choose from


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