Patent ID: 8337615

Claim:
A method of making a single-crystalline Si wafer with an approximately polygonal cross section and having a material property that is the same as a zone-pulled Si crystal, the method comprising: pulling at least one bottle neck of a crystal vertically downwards from a rotating hanging melt drop; reducing a rotational speed of the crystal to between 0 and less than 1 rpm; pulling, in a crystal-growth phase, a Si single crystal ingot vertically downwards, the Si single crystal ingot having an approximately polygonal cross section; generating a temperature profile at a growth phase boundary using an inductor configured to create a polygonal flow distribution, the temperature profile corresponding to a shape of a cross section of the Si single crystal ingot; ending a growth of the Si single crystal ingot at a desired pulling length; and cutting the Si single crystal ingot into wafers having an approximately polygonal cross section.