Abstract: A manufacturing method of a semiconductor device includes at least the following steps. A sacrificial substrate is provided. An etch stop layer is formed on the sacrificial substrate. A portion of the etch stop layer is oxidized to form an oxide layer between the sacrificial substrate and the remaining etch stop layer. A capping layer is formed on the remaining etch stop layer. A device layer is formed on the capping layer. A first etching process is performed to remove the sacrificial substrate. A second etching process is performed to remove the oxide layer. A third etching process is performed to remove the remaining etch stop layer. A power rail is formed on the capping layer opposite to the device layer.

Abstract: A manufacturing method of a semiconductor device includes at least the following steps. A sacrificial substrate is provided. An epitaxial layer is formed on the sacrificial substrate. An etch stop layer is formed on the epitaxial layer. Carbon atoms are implanted into the etch stop layer. A capping layer and a device layer are formed on the etch stop layer. A handle substrate is bonded to the device layer. The sacrificial substrate, the epitaxial layer, and the etch stop layer having the carbon atoms are removed from the handle substrate.

Abstract: A lighting system includes: at least one lamp each including an LED unit; and a power converting device disposed outside of each lamp, and including a first EMI filter, a power converter and a second EMI filter. The first EMI filter is for receiving an AC input voltage from an AC power source, and filters the AC input voltage to generate a filtered voltage. The power converter is for receiving the filtered voltage from the first EMI filter, and performs AC to DC conversion on the filtered voltage to generate a converted voltage. The second EMI filter is for receiving the converted voltage from the power converter, and filters the converted voltage to generate a DC output voltage for receipt by the LED unit of each lamp.

Abstract: A lighting system includes: at least one lamp each including an LED unit; and a power converting device disposed outside of each lamp, and including a first EMI filter, a power converter and a second EMI filter. The first EMI filter is for receiving an AC input voltage from an AC power source, and filters the AC input voltage to generate a filtered voltage. The power converter is for receiving the filtered voltage from the first EMI filter, and performs AC to DC conversion on the filtered voltage to generate a converted voltage. The second EMI filter is for receiving the converted voltage from the power converter, and filters the converted voltage to generate a DC output voltage for receipt by the LED unit of each lamp.