Abstract: A semiconductor device and a method of forming the same are provided. The method includes forming a bottom electrode layer over a substrate. A magnetic tunnel junction (MTJ) layers are formed over the bottom electrode layer. A top electrode layer is formed over the MTJ layers. The top electrode layer is patterned. After patterning the top electrode layer, one or more process cycles are performed on the MTJ layers and the bottom electrode layer. A patterned top electrode layer, patterned MTJ layers and a patterned bottom electrode layer form MTJ structures. Each of the one or more process cycles includes performing an etching process on the MTJ layers and the bottom electrode layer for a first duration and performing a magnetic treatment on the MTJ layers and the bottom electrode layer for a second duration.

Abstract: A self-propelled cleaning machine includes a cleaner body, a sensing module disposed at the cleaner body and a control module. The sensing module senses a distance between an object and the sensing module, and includes a transmitter tramsmitting a light signal, and first and second receivers. The first and second receivers receive the light signal respectively to form a first sensing signal and a second sensing signal. The control module controls the cleaning machine according to the two sensing signals. Center lines of a signal range of the transmitter and a view field of the first receiver form a first intersection point. Center lines of the signal range of the transmitter and a view field of the second receiver form a second intersection point. A distance between the second intersection point and the sensing module is greater than a distance between the first intersection point and the sensing module.