Abstract: Methods and semiconductor devices are provided. A method includes determining a location of a polyimide opening (PIO) corresponding to an under-bump metallization (UBM) feature in a die. The die includes a substrate and an interconnect structure over the substrate. The method also includes determining a location of a stacked via structure in the interconnect structure based on the location of the PIO. The method further includes forming, in the interconnect structure, the stacked via structure comprising at most three stacked contact vias at the location of the PIO.

Abstract: A semiconductor device includes a substrate, a dielectric layer disposed over the substrate, and an interconnect structure extending through the dielectric layer. The dielectric layer includes a low-k dielectric material which includes silicon carbonitride having a carbon content ranging from about 30 atomic % to about 45 atomic %. The semiconductor device further includes a thermal dissipation feature extending through the dielectric layer and disposed to be spaced apart from the interconnect structure.

Abstract: A hair styler and its heating device which can heat the thermal storage piece inside the hair roller quickly to a desired temperature by electromagnetic heating. The thermal storage piece is made of high thermal conductivity material which absorbs heat quite quick and disposed inside the hair roller to prevent the hair from directly contacting the thermal storage piece during hair styling, consequently preventing the hair from being burned. Then a low thermal conductivity isolating layer retains the heat within the hair roller and enables the heat to be uniformly and constantly transmitted to the outer surface of the hair roller, providing an effect of low energy consumption and long-lasting heat. A temperature sensing piece is used to detect and indicate the temperature of the hair styler by using different colors, making it easier for the user to know the temperature of the hair styler.

Abstract: A hair styler and its heating device which can heat the thermal storage piece inside the hair roller quickly to a desired temperature by electromagnetic heating. The thermal storage piece is made of high thermal conductivity material which absorbs heat quite quick and disposed inside the hair roller to prevent the hair from directly contacting the thermal storage piece during hair styling, consequently preventing the hair from being burned. Then a low thermal conductivity isolating layer retains the heat within the hair roller and enables the heat to be uniformly and constantly transmitted to the outer surface of the hair roller, providing an effect of low energy consumption and long-lasting heat. A temperature sensing piece is used to detect and indicate the temperature of the hair styler by using different colors, making it easier for the user to know the temperature of the hair styler.

Abstract: A heating apparatus for heating hair curlers is disposed in a housing and clamped by at least one hair clip. The heating apparatus comprises two assembling members and two thermal conductive members which are coupled one another and disposed on a base. Each of the thermal conductive members includes a heating member and an elastic piece for fixing the heating member. Above the assembling members and the thermal conductive members is disposed a cover. The two heating members are closely pushed against the thermal conductive layers of the hair clip, so as to reduce the length of heat transferring route, and consequently improving heating efficiency and enhancing temperature control accuracy. Furthermore, the heating apparatus has a simple structure and can be easily assembled at a low manufacturing cost.

Abstract: A dual gas and AC electric hair styler comprises: a heater, a housing, and a control member movably disposed in the housing. One end of the control member is exposed out of the housing and another end of the control member is inserted in the housing to connect a linkage device of the heater. The linkage device includes a guiding member. A gas supply and an electric power supply are selectively inserted in the housing to the heater and each have a valve which is pressed to achieve connection. The axial movement of the control member causes axial movements of the linkage device and the guiding member to affect connection of the gas and the electric power supply to the heater. The hair styler can be powered by gas or electric power, and the switching of gas and electric power supplies can be done by the control member.

Abstract: A hair styler capable of producing steam not only can produce steam to assistant the user doing hair style, but also that the hair styler is provided with leak proof members between the respective parts of the hair styler, which can provide better sealing effect and prevent water leakage problems.

Abstract: A dual gas and AC electric hair styler comprises: a heater, a housing, and a control member movably disposed in the housing. One end of the control member is exposed out of the housing and another end of the control member is inserted in the housing to connect a linkage device of the heater. The linkage device includes a guiding member. A gas supply and an electric power supply are selectively inserted in the housing to the heater and each have a valve which is pressed to achieve connection. The axial movement of the control member causes axial movements of the linkage device and the guiding member to affect connection of the gas and the electric power supply to the heater. The hair styler can be powered by gas or electric power, and the switching of gas and electric power supplies can be done by the control member.

Abstract: A hair styler capable of producing steam not only can produce steam to assistant the user doing hair style, but also that the hair styler is provided with leak proof members between the respective parts of the hair styler, which can provide better sealing effect and prevent water leakage problems.