Concepts and technologies are disclosed herein for event-based security challenges. The method also includes forming a second conductive hard mask on the first conductive hard mask for etching magnetic layers of the MTJ apparatus during a second etching step. A user chills the entire device or a cooling component within the device, and then places the pharmaceutical item inside the device and closes the device around it. The diffusing plate cooperates with the frame to define a space that accommodates the light source. Air and mixture passages in operation are at least partially connected to each other. It is possible to reduce the cost of manufacturing a multi-chip module wherein plural types of chips having different terminal pitches are mounted on a wiring substrate.