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Re: jeunke22 post# 81240

Saturday, 10/02/2021 6:08:32 PM

Saturday, October 02, 2021 6:08:32 PM

Post# of 199919

Silicon is an anorganic (sic) material, you need to dig it up and process it. Polymer is organic , you grow it in the lab.


Not quite. But expected, as you clearly have no idea how silicon boules are grown. Most folks do not.

In fact, silicon boules (ingots) are grown in a lab environment under carefully controlled conditions, to the atomic level. Much as you attribute to your vaunted polymer.

It is important to understand the physics and chemistry of semiconductor manufacture if you want to try to understand what adding polymers to the mix requires. And the risks and costs inherent in doing so.

Growing a Silicon Ingot

To grow a silicon ingot, the first procedure is to heat the silicon to 1420°C, which is above the melting point of silicon. Once the crystal and dopant mixture has been dissolved, the single silicon crystal seed is put on top of the melt, hardly touching the surface.

The Next Steps

Keep in mind that the seed must have the same crystal orientation in the accomplished ingot. The doping must also be uniform. To achieve this, the seed crystal and the container of molten silicon must rotate in opposite directions. Once it reaches the required conditions for crystal growth, the seed crystal can be taken out of the melt. The growth will then begin to take place with a fast pulling of the seed crystal. Doing this will reduce the number of crystal defects within the seed while it’s still at the beginning of the silicon wafer manufacturing.

Finishing Process

After this, the pulling speed will be reduced to allow the size of the crystal to increase. Once the desired size is achieved, the growth conditions are maintained to control the diameter. After removing from the melt, and as it starts to cool, the atoms start to orient themselves to the crystal structure of the seed.


https://www.waferworld.com/silicon-wafer-manufacturing-process-growing-silicon-ingots/
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