Abstract: A punching training device includes: a base; a supporting assembly including a fixed rod and a telescopic rod, the fixed rod connected to the base, the telescopic rod being detachably connected to the fixed rod, the telescopic rod being retractable in an axial direction of the fixed rod relative to the fixed rod; and a punching assembly including an elastic rod and a strike body, the elastic rod being detachably connected to the telescopic rod, the elastic rod being made of elastic material, the strike body being disposed on the elastic rod.

Abstract: An explosion-proof hitting ball and a training device including the same are provided, wherein the explosion-proof hitting ball includes: a tubular member made of plastic material and including an outer wall; and a ball member made of explosion-proof material and including a tubular wall and a ball wall, the tubular wall and the ball wall being transverse and connected to each other to form a chamber, the tubular wall being disposed around the tubular member and integrally connected to the outer wall by melting-connection.

Abstract: A barbell is provided. The barbell includes a main body and two holding elements. The main body is elongated and hollow to enclose a receiving room. The receiving room is adapted for being filled with fluid or solid. The main body defines a longitudinal direction. The main body is formed with at least one positioning recess on the outer surface thereof. Each holding element is movable sleeved onto the main body. The holding element has a positioning element which is selectively abutted against the positioning recess to position the holding element on the main body. The holding element further has a holding portion for holding.

Abstract: A barbell is provided. The barbell includes a main body and two holding elements. The main body is elongated and hollow to enclose a receiving room. The receiving room is adapted for being filled with fluid or solid. The main body defines a longitudinal direction. The main body is formed with at least one positioning recess on the outer surface thereof. Each holding element is movable sleeved onto the main body. The holding element has a positioning element which is selectively abutted against the positioning recess to position the holding element on the main body. The holding element further has a holding portion for holding.

Abstract: Methods for an oxide layer over an epitaxial layer. In an embodiment, a method includes forming an epitaxial layer of semiconductor material over a semiconductor substrate; forming an oxide layer over the epitaxial layer; applying a solution including an oxidizer to the oxide layer; and cleaning the oxide layer with a cleaning solution. In another embodiment, a densification process is applied to an oxide layer including treating with thermal energy, UV energy, or both. In an embodiment for a gate-all-around device, the cleaning process is applied to an oxide layer over an epitaxial portion of a fin. Additional methods are disclosed.

Abstract: Methods for an oxide layer over an epitaxial layer. In an embodiment, a method includes forming an epitaxial layer of semiconductor material over a semiconductor substrate; forming an oxide layer over the epitaxial layer; applying a solution including an oxidizer to the oxide layer; and cleaning the oxide layer with a cleaning solution. In another embodiment, a densification process is applied to an oxide layer including treating with thermal energy, UV energy, or both. In an embodiment for a gate-all-around device, the cleaning process is applied to an oxide layer over an epitaxial portion of a fin. Additional methods are disclosed.