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 packing box for headphones has a body. The body has an inner chamber, at least one opening, at least one lid and a window. The opening is defined through the body and communicates with the inner chamber. The lid covers the at least one opening. The window is defined through the body, communicates with the inner chamber and has at least one curved edge. The curved edge displays operational characteristics of the headphones. Potential buyers can quickly discern the operational characteristics of the headphones from the curved edge of the window. Therefore, the correct headphones for buyers' particular needs can be selected quickly and accurately.

Abstract: A packing box for headphones has a body. The body has an inner chamber, at least one opening, at least one lid and a window. The opening is defined through the body and communicates with the inner chamber. The lid covers the at least one opening. The window is defined through the body, communicates with the inner chamber and has at least one curved edge. The curved edge displays operational characteristics of the headphones. Potential buyers can quickly discern the operational characteristics of the headphones from the curved edge of the window. Therefore, the correct headphones for buyers' particular needs can be selected quickly and accurately.

Abstract: An earphone has a body, a connecting element and a speaker. The body has a distal end, a joint, a core, a base, an outer side, an inner side, and a connecting cylinder. The joint extends from the distal end. The base is formed in the core. The connecting cylinder is formed on the inner side. The connecting element has an inner side and an outer side. The outer side is formed annularly multiple tabs and multiple circular recesses. The multiple circular recesses are formed respectively between the multiple tabs and hold respectively the multiple protrusions inside. The speaker is mounted in the base. Therefore, manufacturers can switch between the different connecting elements to provide both a plug-type earphone and an insert-type earphone during the manufacturing process.

Abstract: A wireless headphone with a self-actuated switch has a belt, two retainers and a self-actuated switch. The self-actuated switch has a base and a resilient bar. The base is mounted in a mounting recess in the belt and has a button. The resilient bar is mounted in the mounting recess in the belt and selectively presses against the button. Bending the belt will force the resilient bar to move forward to press the button. When the button is pressed, the wireless headphone will be actuated, and reverse.

Abstract: A grinding wheel has a base ring, a positioning disk disposed on the base ring, a grinding cloth assembly disposed on the positioning disk, and an upper ring disposed on the grinding cloth assembly. The positioning disk has an upper annular flange and a circular hole. The upper ring has a round hole. The grinding cloth assembly has a first grinding cloth disk, a second grinding cloth disk, and a third grinding cloth disk adhered together. The upper annular flange passes through the first grinding cloth disk, the second grinding cloth disk, and the third grinding cloth disk to be inserted in the round hole of the upper ring.

Abstract: A compact disc case includes an integrally formed foldable cover and a plate mounted to the cover. The cover has a first part having a first compact disc holding element and a first locking element, a middle part having a reinforcement structure which has two longitudinal parallel side walls defining an engaging slot, and a second part having a second holding element and a second locking element to engage with the first locking element when the cover is folded. The plate has two compact disc holding elements formed on both sides thereof and is inserted in the engaging slot and retained therein by way of engaging a number of connecting elements thereof with a corresponding number of catching elements formed on the side walls. Whereby, the case has a maximum capacity of containing up to four compact discs therein.