Abstract: A method of growing a single crystal ingot includes growing a single crystal silicon ingot from a silicon melt in a crucible within an inner chamber, adding a volatile dopant into a feed tube, positioning the feed tube within an inner chamber at a first height relative to a surface of the melt, adjusting the feed tube within the inner chamber to a second height at a speed rate, and heating the volatile dopant to form a gaseous dopant as the feed tube is moved from the first height to the second height at the speed rate. Each of the second height and the speed rate are selected to control a vaporization rate of the volatile dopant. The method also includes introducing dopant species into the melt while growing the ingot by contacting the surface of the melt with the gaseous dopant.

Abstract: A method of growing a single crystal ingot includes growing a single crystal silicon ingot from a silicon melt in a crucible within an inner chamber, adding a volatile dopant into a feed tube, positioning the feed tube within an inner chamber at a first height relative to a surface of the melt, adjusting the feed tube within the inner chamber to a second height at a speed rate, and heating the volatile dopant to form a gaseous dopant as the feed tube is moved from the first height to the second height at the speed rate. Each of the second height and the speed rate are selected to control a vaporization rate of the volatile dopant. The method also includes introducing dopant species into the melt while growing the ingot by contacting the surface of the melt with the gaseous dopant.

Abstract: A pair of eyeglasses with a sunshade comprising a sunshade releasably combined with a frame and a plate glass also collapsibly combined with the frame, the sunshade and the plate glass being replaceable to be combined with the frame according to the taste of a user.

Abstract: Eyeglasses with lenses replaceable comprising a lens frame and a plurality of pairs of lenses to be selectably used and fitted in two lens holes of the lens frame by a user with easiness without need of any tools, each lens hole and each lens having the same shape, each lens hole having a circumferential wedge-shaped ridge to engage exactly with a circumferential wedge-shaped groove of each lens, each lens hole and each lens having a wedge-shape position portion and a nearly-round fitting portion to correspond with each other so that each lens may fit in each lens hole with firm stability.