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: There is provided a smoke detector including a first light source, a second light source surface, a light sensor and a processor. The light sensor receives reflected light when the first light source and the second light source emit light, and generates a first detection signal corresponding to light emission of the first light source and a second detection signal corresponding to light emission of the second light source. The processor distinguishes smoke and floating particles according to a similarity between the first detection signal and the second detection signal.

Abstract: A method for indicating the user's name on a blood-sampling needle pen and the product thereof includes providing a see-through window on the housing of the blood-sampling needle pen, or having the housing made of transparent materials, forming a media compartment of hollow chamber inside of the housing such that a curled note indicating the user's name, the date and the relevant data, etc. can be inserted thereinto, covering a cap on the rear end of the blood-sampling needle pen, and mounting a dust cover on the front end of the blood-sampling needle pen, thereby forming a blood-sampling needle pen different from the disposable ones of the prior art for the purposes of enhancing economic and environmental effect.

Abstract: A method for indicating the user's name on a blood-sampling needle pen and the product thereof includes providing a see-through window on the housing of the blood-sampling needle pen, or having the housing made of transparent materials, forming a media compartment of hollow chamber inside of the housing such that a curled note indicating the user's name, the date and the relevant data, etc. can be inserted thereinto, covering a cap on the rear end of the blood-sampling needle pen, and mounting a dust cover on the front end of the blood-sampling needle pen, thereby forming a blood-sampling needle pen different from the disposable ones of the prior art for the purposes of enhancing economic and environmental effect.