Abstract: The steps of the present invention are as follows: (a) a detachable film is formed on both sides of a substrate, respectively; (b) a number of vias running through both sides of the detachable films are formed in the substrate; (c) the vias are filled with a conductive paste; (d) the detachable films are peeled off; (e) a metallic conductive layer is deposited on both sides of the substrate, respectively; (f) a specific mold pattern is formed on the metallic conductive layers, respectively, by a photolithographic process; (g) a metallic circuit layout layer is formed on the patterns, respectively, by an electrochemical process; and (h) the mold patterns and the metallic conductive layers are removed. As such, the substrate is not contaminated by the conductive paste. Further, by using deposition, metallic conductive layers are directly adhered to the substrate and, by using photolithography, layouts with small linewidth could be formed.

Abstract: A portable electronic device and control method thereof perform an unlocking operation and several page turning operations for a display of the portable electronic device. Light intensities in several positions of the light sensors are detected in a preset time period. The portable electronic device determines whether the operating mode is a predetermined operating mode and determines whether the portable electronic device is locked by the detected light intensities. The portable electronic device unlocks the portable electronic device upon detecting the portable electronic device is locked. Furthermore, the portable electronic executes at least one page turning operation on the display unit upon detecting the portable electronic device is unlocked.

Abstract: A multifunctional portable electronic device includes a smoke sensing device, a controlling module, a positioning module, an alarm module; and a wireless transmitting/receiving module electrically connected together. The smoke sensing device senses the smoke concentration in the air. The controlling module determines whether the smoke concentration exceeds a preset smoke concentration threshold; and when the smoke concentration exceeds a preset smoke concentration threshold, the controlling module controls the positioning module to identify the position of the portable electronic device. The alarm module converts the position information to alarming information, and the alarming information is sent to a preset object via the wireless transmitting/receiving module.