Polysilicon production time
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At which hour during polysilicon production does the output reach its maximum value, the optimal level?
It is necessary to take into account the specific production characteristics of each factory, as well as what your current average startup time is.
For electronic-grade applications, it takes longer; for solar energy, it only takes over 20 hours
Reply to 3# Wind and Rain Without Clear Skies: How long will it take for the electronic-grade one?
Are there any significant differences between electronic-grade and solar-grade materials in terms of feeding procedures? Isn’t this not the main factor affecting purity?
There is a difference; electronic-grade materials are required to be dense in structure
Reply to 6# Minos: Density is indeed good, but does longer density necessarily mean higher purity? Or does longer porosity necessarily mean lower purity? There’s no necessary connection between the two, right?
Reply to 3# Wind and Rain Without Clear Skies: Reaching the maximum amount in over 20 hours? How many hours is your production cycle? It can’t be that fast, right? It has only changed by a minimal amount after over 20 hours; it should increase gradually
It grows in a loose structure, and the loose areas are prone to adsorbing or even trapping impurities; therefore, if silane is used as the feed gas, a loose structure can be formed, but this is not the case when TCS is used
Reply to 9# Minos: You’re referring to the specific surface area, right? That’s correct. However, if the temperature is well controlled, the formation of popcorn-like particles can be minimized. If the raw materials are pure enough, there will be no absorption of impurities, and high-pressure production can also result in electronic products of top quality.
Pure raw materials are of no use either; if the Cl element itself is adsorbed and enclosed, the purity still cannot be increased. But it’s different in the case of *alkanes, which contain only H and no Cl